TNPSC Combined Technical Service 2025: COMBINED TECHNICAL SERVICES EXAMINATION IN DIPLOMA / ITI LEVEL, TRADE - MACHINIST
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COMBINED TECHNICAL SERVICE EXAMINATIONS
DIPLOMA / ITI STANDARD - 2025
TENTATIVE KEYS MARKED QUESTION PAPER
TRADE: MACHINIST (539)
1. Which one is water filled extinguishers?
uspº { ¨£¨£mh w¯øn¨£õß Gx?
(A) Foam extinguishers (B) Dry powder extinguishers
~ø Aøn¨£õßPÒ E»º ö£õi w Aøn¨£õßPÒ
(C) Halon extinguishers (D) CO2 (or) water
íõ»ß w¯øn¨£õßPÒ Põº£ß&øh&BUøék (or) uspº
(E) Answer not known
Âøh öu¯ÂÀø»
2. Which one is the categories of -PPEs?
PPE&PÎß ¤ÄPÒ GøÁ?
(A) Ventilation
PõØ÷Óõmh Á\v
(B) Non-respiratory and Respiratory
_Áõ\ öuõhº¦øh¯øÁ ©ØÖ® öuõhº£ØÓøÁ
(C) Respiratory protective equipments
_Áõ\ £õxPõ¨¦ PÁ\ \õuÚ®
(D) Arms and hands protection
øPPÒ £õxPõ¨¦ EøÓ
(E) Answer not known
Âøh öu¯ÂÀø»
3. Common soft skills are
ö£õxÁõÚ ö©ß vÓßPÒ __________ BS®.
(A) Strong work ethic (B) Positive attitude
Á¾ÁõÚ öuõÈÀ uº©® £õêiÆ ©÷Úõ£õÁ®
(C) Good communication skills (D) All of these
|À» uPÁÀ öuõhº¦z vÓß AøÚzx®
(E) Answer not known
Âøh öu¯ÂÀø»
3 539-Trade Machinist
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4. Which colour code for paper waste?
PõQu® PÈĨ ö£õ¸Îß {Ó® GßÚ?
(A) Yellow (B) Red
©g\Ò ]P¨¦
(C) Green (D) Blue
£aø\ }»®
(E) Answer not known
Âøh öu¯ÂÀø»
5. How many classification of fire?
Gö£õ¸Ò GzuøÚ ÁøPPÍõP ¤UP¨£mkÒÍx?
(A) 5 (B) 7
I¢x HÊ
(C) 9 (D) 4
Jߣx |õßS
(E) Answer not known
Âøh öu¯ÂÀø»
6. Origin of 5S concept
5S uzxÁ® E¸ÁõUQ¯x
(A) India (B) America
C¢v¯õ Aö©UPõ
(C) England (D) Japan
C[Q»õ¢x ᨣõß
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 4
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7. Declaring Death by
CÓ¢xÂmhøu EÖvö\´£Áº
(A) Doctor (B) Qualified medical doctor
©¸zxÁº |ßS uSvÁõ´¢u ©¸zxÁº
(C) Nurse (D) Qualified Nurse
ö\¼¯º |ßS uSvÁõ´¢u ö\¼¯º
(E) Answer not known
Âøh öu¯ÂÀø»
8. Expansion of MCB
MCB&ß ÂÁõUP®
(A) Main circuit Breaker (B) Main control Breaker
ö©°ß \ºUSm ¤÷ UPº ö©°ß Pßm÷ õÀ ¤÷ UPº
(C) Most circuit Breaker (D) Miniature circuit Breaker
÷©õìm \ºUSm ¤÷ UPº ªÛ÷¯a\º \ºUSm ¤÷ UPº
(E) Answer not known
Âøh öu¯ÂÀø»
9. The emergency of patient to reach the hospital with first 30 minutes is
called as
CUPmhõÚ `Ì{ø»°À ÷|õ¯õÎ 30 {ªh[PÐUSÒ ©¸zxÁ©øÚUS
öPõsk ö\À¾® øÓø¯ SÔ¨£x
(A) Bronze period (B) Golden period
öÁsP» Põ»® u[P©õÚ Põ»®
(C) Iron period (D) Silver period
C¸®¦ Põ»® öÁÒÎ Põ»®
(E) Answer not known
Âøh öu¯ÂÀø»
5 539-Trade Machinist
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10. should be used while work on live circuits.
ªß\õ ® £õ´¢x öPõsi¸US® ªß_ØÔÀ ÷Áø» ö\´²®ö£õÊx __________
£¯ß£kzv°¸UP ÷Ásk®.
(A) Helmet (B) Rubber gloves
uø»PÁ\® ¨£º øP²ø PÒ
(C) Goggles (D) Tie
£õxPõ¨¦ Psnõi PÊzx¨ £møh
(E) Answer not known
Âøh öu¯ÂÀø»
11. For marking purposes, a vernier height gauge must be used on the
©õºUQ[ ÷Áø» ö\´²® ö£õÊx, öÁºÛ¯º øím ÷Päø¯ __________ Ähß
Psi¨£õP ÷©÷» Aø©zx £¯ß£kzu ÷Ásk®.
(A) Bed of machine (B) Surface plate
C¯¢v zvß ö£m \º÷£ì ¤÷Ím
(C) Square Block (D) Any flat surface
ìöPõ¯º ¤ÍõU ©mh ÷©Ø£ ¨¦ H÷uÝ®
(E) Answer not known
Âøh öu¯ÂÀø»
12. As per BIS standard, round rods are designated by
BIS øÓ¨£i, E¸øÍ ÁiÁ £o¨ö£õ¸øÍ __________ GÚ SÔ¨¤h
÷Ásk®.
(A) Diameter in mm (B) Diameter ISRO
Âmh® ªÀ¼ «mhÀ Âmh® ISRO
(C) Length Diameter (D) Diameter length
}Í® Âmh® Âmh® }Í®
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 6
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13. What is the function of thumb lever of vernier caliper?
öÁºÛ¯º Põ¼£ß u®¨ ¼Áº&ß ÷Áø» GßÚ?
(A) For getting least count
½ìm PÄsøh ö£Ó
(B) To take internal measurement
EÒ AÍÃkPøÍ AÍUP
(C) To take external measurement
öÁÎ AÍÃkPøÍ AÍUP
(D) To set vernier slide at any position
öÁºÛ¯º ]ø»øh G¢u {ø»°¾® {ø» {Özu
(E) Answer not known
Âøh öu¯ÂÀø»
14. What is the least count of the micrometer if the circumference of thimble
is divided in to 50 division and the pitch of thread is 0.5 mm?
v®¤Ò _ØÖ£Sv 50 ¤ÄPÍõP ¤UP¨£mk ©ØÖ® Auß ¤a 0.5 mm BP
EÒÍ ø©U÷ õ «mhß ½ìm PÄsm GßÚ?
(A) 0.001 mm (B) 0.010 mm
(C) 0.020 mm (D) 0.050 mm
(E) Answer not known
Âøh öu¯ÂÀø»
7 539-Trade Machinist
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15. How does the concentricity of shaft can be checked?
J¸ ì\õ¨iß Põßìö\ßi ]miø¯ GÆÁõÖ PshÔ¯ ÷Ásk®
(A) Using combination set
Põ®¤÷Ú\ß ö\møh £¯ß£kzv
(B) Using dial test indicator
h¯À öhìm Cßi÷Pmø £¯ß£kzv
(C) Using centre gauge
ö\ßhº ÷Pä £¯ß£kzv
(D) Using vernier caliper
öÁºÛ¯º Põ¼¨£ø £¯ß£kzv
(E) Answer not known
Âøh öu¯ÂÀø»
16. Which one of the following symbols belongs to the location group of
geometrical tolerance?
¤ßÁ¸® SÔ±kPÎÀ Gx â÷¯õö©mUPÀ hõ» ßì&°ß ö»õU÷P\ß
SÊÂØS ö\õ¢u©õÚx
(A) (B) //
(C) (D)
(E) Answer not known
Âøh öu¯ÂÀø»
17. How many sets available in telescopic gauge?
öh»ì÷Põ¤U ÷PâÀ ö\miÀ GzuøÚ GsoUøP EÒÍx?
(A) 5 (B) 10
(C) 6 (D) 8
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 8
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18. Which one of the following Geometrical tolerance symbol in flatness
RÌPshøÁPÎÀ G¢u JßÖ Geometrical tolerance symbol in flatness
(A) (B)
(C) (D) //
(E) Answer not known
Âøh öu¯ÂÀø»
19. marking medium will give very clear lines. But, takes more
time for drying than other medium.
__________ ©õºUQ[ ö£õ¸ÍõÚx ©ØÓ ©õºUQ[ ö£õ¸øÍ Âh Põ´ÁuØS ÷| ®
Gkzuõ¾® Áø ÷PõkPøÍ öuÎÁõP ¤ v£¼US®.
(A) Copper sulphate (B) Cellulose lacquer
Põ¨£º \À÷£m ö\À¾÷»õì ¼UPº
(C) Prussian Blue (D) Chaulk white wash
¦¹æ¯ß ¦Ñ \õU öÁõ°m Áõè
(E) Answer not known
Âøh öu¯ÂÀø»
20. Try square is specified by its
ö£õxÁõP __________ ß »® iø ìöPõ¯º SÔ¨¤h¨£kQÓx.
(A) Material (B) Length of the stock
Auß E÷»õP® ìhõUQß }Ízvß
(C) Thickness (D) Length of the Blade
PÚzvß ¤÷Íiß }Ízvß
(E) Answer not known
Âøh öu¯ÂÀø»
9 539-Trade Machinist
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21. Commonly, surface Gauge is used to setting machine surface
to the reference surface.
ö£õxÁõP, \º÷£ì ÷PäáõÚx u Ä £ ¨¤ØS __________ BP C¯¢v £ ¨ø£
Aø©UP £¯ß£kzu¨£kQßÓx.
(A) Perpendicular (B) Parallel
ö\[SzuõP Cøn¯õP
(C) Cross wise (D) Right angle
SÖUS Á\©õP Á»x ÷PõnzvÀ
(E) Answer not known
Âøh öu¯ÂÀø»
22. The part of the universal surface gauge which helps to draw a parallel
line along edge is the
ö£õx ÷©Ø£ ¨¦©õÛ°ß G¢u £õP® K [PÎÀ Cøn¯õP ÷Põk Áø ÁuØS
£¯ß£kQÓx?
(A) Rocker arm (B) Snug
Au Aø\Áß ì|U
(C) Fine adjustment screw (D) Guide Pins
|ßS \ ö\´¯UTi¯ v¸S ÁÈ |hzv F]PÒ
(E) Answer not known
Âøh öu¯ÂÀø»
23. In combination set, the square head has one measuring fact at 90 and
another at
Põ®¤÷Ú\ß ö\miÀ J¸ ìöPõ¯º öím J¸ AÍÂk® P¨¦ 90 iQ°¾®
©ØöÓõßÖ
(A) 15 (B) 30
(C) 45 (D) 60
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 10
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24. Try squares Blade length off
mø ìöPõ¯ºPÒ, ¤÷Íiß }Ízøu¨ ö£õÖzx SÔ¨¤h¨£kQßÓÚ AuõÁx
(A) 100, 150, 200 mm (B) 250, 300, 350 mm
(C) 400, 450, 500 mm (D) 25, 50, 75 mm
(E) Answer not known
Âøh öu¯ÂÀø»
25. Which one of the marking media is quick drying and sticks to surfaces
well?
G¢u J¸ ©õºUQ[ «i¯õ ÷ÁP©õP E» Ä® £ ¨¦PÎÀ |ßS JmhÄ® ö\´QÓx?
(A) Prussion blue (B) Copper sulphate
¦¹æ¯ß ¦Ñ Põ¨£º \À÷£m
(C) White wash (D) Cellulose Lacquer
J°m Áõè ö\À¾÷»õì ÷»U³º
(E) Answer not known
Âøh öu¯ÂÀø»
26. The stub arbors are used to hold cutter in machines.
__________ C¯¢v zvÀ PmhºPøÍ ¤izx ÷Áø» ö\´¯ ìh¨ Bº£ºPÒ
£¯ß£kQÓx.
(A) Horizontal milling (B) Vertical milling
í\õßhÀ ªÀ¼[ öÁºiPÀ ªÀ¼[
(C) Universal milling (D) Omniversal milling
²ÛÁº\À ªÀ¼[ K®²ÛÁº\À ªÀ¼[
(E) Answer not known
Âøh öu¯ÂÀø»
11 539-Trade Machinist
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27. End mill cutters are usually used in
Gsm ªÀ PmhºPÒ ö£õxÁõP £¯ß£kzu¨£kÁx __________ ö©æÛÀ
(A) Surface grinding machine (B) Horizontal milling machine
\ºL÷£ì Qø si[ ö©æß í\õshÀ ªÀ¼[ ö©æß
(C) Vertical milling machine (D) Cylindrical grinding machine
öÁºiPÀ ªÀ¼[ ö©æß ]¼siPÀ Qø si[ ö©æß
(E) Answer not known
Âøh öu¯ÂÀø»
28. The portion of the reamer which is held and driven. It can be parallel or
taper. That is called
©ß G¢u £õPzøu ¤izx Ax C¯UP¨£kQÓx A¢u £õP® ÷£ »»õP÷Áõ
AÀ»x ÷h¨£ õP÷Áõ C¸US®
(A) Body (B) Shank
£õi ÷å[
(C) Racess (D) Axis
\ì BU]ì
(E) Answer not known
Âøh öu¯ÂÀø»
29. The general purposes the roughness values are graded into 12 grades
designated as
ö£õx ÷|õUP[PÐUPõP L¨Úì ©v¨¦PÒ 12 u [PÍõP __________ uÀ
__________ Áø u ¨£kzu¨£kQßÓÚ.
(A) N-0 to N-12 (B) N-1 to N-12
(C) 0 to 12 (D) 1 to 12
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 12
Text of page 11
30. A spiral can be produced on a surface.
__________ ÁiÁ ÷©Ø£ ¨¤À J¸ ìø£ ø» E¸ÁõUP i²®.
(A) Conical (B) Square
T®¦ \x ®
(C) Rectangular (D) Hexagon
ö\ÆÁP® AÖ[÷Põn®
(E) Answer not known
Âøh öu¯ÂÀø»
31. A is a multipoint cutting tool used for enlarging by finishing
previously drilled holes to accurate sizes.
HØPÚ÷Á xøÍ°h¨£mh xøÍPøÍ \Ø÷Ó ö£uõUPÄ®, \¯õÚ AÍÂØS
L¤Ûæ[ ö\´ÁuØS® £¯ß£kzu¨£k® P¸ÂUS __________ GßÖ ö£¯º.
(A) Die (B) Taps
øh ÷h¨ì
(C) Drills (D) Reamers
iÀì ©ºì
(E) Answer not known
Âøh öu¯ÂÀø»
32. Drills and milling cutters tempering Temperature of
iÀ¼[ ©ØÖ® ªÀ¼[ Pmhø £u¨£kzxuÀ ö\´¯ öh®£÷ a\º
(A) 220 C (B) 230 C
(C) 240 C (D) 250 C
(E) Answer not known
Âøh öu¯ÂÀø»
13 539-Trade Machinist
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33. The property of a metal to melt and become liquid when heated is called
J¸ E÷»õP® `hõS® ÷£õx E¸Q v Á©õP ©õÖ® £s¦
(A) Fusibility (B) Conductivity
E¸S® ußø© Phzx® ußø©
(C) Magnetic property (D) Mechanical property
Põ¢uz ußø© C¯¢v Sn ußø©
(E) Answer not known
Âøh öu¯ÂÀø»
34. The property that measures how well a metal conducts heat and
electricity is called
J¸ E÷»õP® öÁ¨£zøu²® ªß\õ zøu²® GÆÁÍÄ ]Ó¨£õP PhzxQÓx
Gߣøu AÍÂk® £s¦ __________ GÚ¨£k®.
(A) Structure (B) Conductivity
Pmhø©¨¦ Phzx® ußø©
(C) Weight (D) Colour
Gøh {Ó®
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 14
Text of page 13
35. In one complete revolution of worm shaft the worm wheel revolves.
Áõ® åõ¨øh J¸ Ê _ØÖ AøhÁuØS Áõ® ÃÀ __________ _ØÓ¨£kQÓx.
1 th 1 th
(A) of revolution (B) of revolution
10 20
1 1
£[S _ØÖuÀ £[S _ØÖuÀ
10 20
1 th 1 th
(C) of revolution (D) of revolution
30 40
1 1
£[S _ØÖuÀ £[S _ØÖuÀ
30 40
(E) Answer not known
Âøh öu¯ÂÀø»
36. Calculate the index crank movement required to index 8 divisions in
simple Indexing?
]®¤Ò CßöhUê[&À CßöhUì Q õ[ 8 £SvPÍõP ¤UP GzuøÚ øÓ
_ÇØÓ ÷Ásk®?
(A) 3 Turn (B) 4 Turn
(C) 5 Turn (D) 6 Turn
(E) Answer not known
Âøh öu¯ÂÀø»
37. Which one of the following is Not a heat treatment process?
RÌPshøÁPÎÀ G¢u JßÖ öÁ¨£ £uÛk® øÓ AÀ»?
(A) Annealing (B) Normalising
Aßܼ[ |õº©¼][
(C) Tempering (D) Machining
öh®£[ ª]Û[
(E) Answer not known
Âøh öu¯ÂÀø»
15 539-Trade Machinist
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38. One turn of crank of Indexing head rotates the spindle.
CßöhUê[ öím Q õ[ß J¸ _ØÖ ì¤siø» __________ _ÇØÖQÓx.
(A) 9 (B) 18
(C) 40 (D) 45
(E) Answer not known
Âøh öu¯ÂÀø»
39. What is the formula for index crank movement for simple indexing?
]®¤Ò CßöhUê[&À CßöhUì Q õ[ _ØÖÁuØS `zv ® GßÚ?
(A) D/9 (B) 9/D
(C) 40/N (D) N/40
(E) Answer not known
Âøh öu¯ÂÀø»
40. Which one of the following is used to clamp the job in relation to the tool
in mass production?
RÌPshÁØÔÀ G¢u JßÖ ö£¸©Í»õÚ EØ£zv°À áõø£ l¾US HxÁõP
¤iUP £¯ß£kQÓx.
(A) Jig (B) Fixture
âU L¤U\º
(C) Housing (D) Gauge
íÄ][ ÷Pä
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 16
Text of page 15
41. Jig is of box-like construction which is generally employed to
drill a number of holes on a component from different angles.
__________ âU BÚx ö£mi ÷£õßÓ Aø©¨ø£ öPsi¸US® ©ØÖ® Ax J¸
ö£õ¸ÎÀ öÁÆ÷ÁÖ ÷Põn[PÎÀ £» xøÍPÒ Ch £¯ß£k®
(A) Ring Jig (B) Leaf Jig
[ âU ½L¨ âU
(C) Box Jig (D) Plate Jig
£õUì âU ¤÷Ím âU
(E) Answer not known
Âøh öu¯ÂÀø»
42. Jig is employed to drill holes on circular flanged parts
__________ âU Ámh ÁiÁ L¨÷Íga £SvPøÍ xøÍ°h £¯ß£kQÓx.
(A) Template Jig (B) Plate Jig
öh®¨÷Ím âU ¤÷Ím âU
(C) Ring Jig (D) Channel Jig
[ âU ÷\ÚÀ âU
(E) Answer not known
Âøh öu¯ÂÀø»
43. guide the tool
__________ lø» ÁÈ|hzx®
(A) Jig (B) Fixture
âU L¤Uéº
(C) Vice (D) Clamp
øÁì QÍõ®¨
(E) Answer not known
Âøh öu¯ÂÀø»
17 539-Trade Machinist
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44. In milling cutter, if the radial line and tooth face coincide in the
diameter plan the rake angle is
ªÀ¼[ PmhÀ ÷ i¯À ø»ß ©ØÖ® £À¼ß Pzvß ø»Ý® J÷
÷|ºU÷PõmiÀ øh¯õ «mhº uÍzvÀ ÷ U B[QÎß ©v¨£õÚx
(A) Positive
£õ]miÆÁõS®
(B) Zero
ã÷ õ
(C) Negative
ö|PiÆ
(D) Either positive or negative
£õ]miÆ AÀ»x ö|PiÁõP÷Áõ C¸US®
(E) Answer not known
Âøh öu¯ÂÀø»
45. Why the clearance Angle given in milling cutter cutting edges?
Hß ªÀ¼[ Pmhß Pmi[ Gmä&À Qί ßì B[QÒ öPõkUP¨£kQÓx?
(A) To Avoid Rubbing the workpiece
£o¨ö£õ¸Îß Pmi[ Gmäß £UPÁõmk¨ £Sv E \õ©À C¸UP
(B) To Increase the strength of the Tooth
£ØPÐUS AvP EÖvø¯ u
(C) For Beauty purpose
AÇPõÚ ÷uõØÓzvØPõP
(D) To Reduce the weight of the cutter
Pmhß Gøhø¯ SøÓ¨£uØPõP
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 18
Text of page 17
46. cutter used for pocket milling
£õUöPm ªÀ¼[ (öuõmi £ÒÍ®) ªÀ¼[ ö\´¯ __________ Pmhº
£¯ß£kzu£kQÓx.
(A) Slitting saw cutter (B) Side and face mill cutter
]¼mi[ \õ Pmhº ø\k Ask ÷£ì ªÀ Pmhº
(C) Single Angle milling cutter (D) End mill cutter
][QÒ B[QÒ ªÀ¼[ Pmhº Gsk ªÀ Pmhº
(E) Answer not known
Âøh öu¯ÂÀø»
47. cutters arc made in width of 3 to 6 mm.
__________ PmhºPÒ 3 uÀ 6 ª« ui©ßPÎÀ u¯õUP¨£kQßÓÚ.
(A) Slitting saw (B) End mill
]¼mi[ \õ Gsk ªÀ
(C) Cylindrical mill (D) Face mill
]¼siUPÀ ªÀ ÷£ì ªÀ
(E) Answer not known
Âøh öu¯ÂÀø»
48. Generally milling long Arbor length is
ö£õxÁõP ªÀ¼[ »õ[U Bº£ß }Í®
(A) 300 mm (B) 400 mm
300 ª« 400 ª«
(C) 500 mm (D) 600 mm
500 ª« 600 ª«
(E) Answer not known
Âøh öu¯ÂÀø»
19 539-Trade Machinist
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49. Generally cutters are used for straddle milling operation.
ö£õxÁõP ì÷hh À ªÀ¼[ ÷Áø»US __________ PmhºPÒ
£¯ß£kzu¨£kQßÓÚ.
(A) Side and milling (B) Slitting saw
ø\k ©ØÖ® ªÀ¼[ ]¼mi[ \õ
(C) Cylindrical milling (D) End mill
]¼siUPÒ ªÀ¼[ Gsk ªÀ
(E) Answer not known
Âøh öu¯ÂÀø»
50. Milling machine Table having movements in __________ Directions.
ªÀ¼[ ö©æÛß ÷h¤ÍõÚx __________ vø\PÎÀ C¯UP[PøÍ
öPõskÒÍx.
(A) 2 (B) 3
(C) 4 (D) 5
(E) Answer not known
Âøh öu¯ÂÀø»
51. Tool holding device in milling machine is as follows.
ªÀ¼[ ª]ÛÀ öÁmkÎø¯ uõ[S® \õuÚ©õÚx
(A) Jig (B) Fixture
âU ¤U\º
(C) Arbor (D) Table
Bº£º ÷h¦Ò
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 20
Text of page 19
52. The another name of the climb milling is
HÖ ªÀ¼[Qß ÷ÁÖ ö£¯º
(A) Up milling (B) Down milling
÷©À÷|õUS ªÀ¼[ RÌ÷|õUS ªÀ¼[
(C) Conventional milling (D) None of the above
PßöÁß\éÚÀ ªÀ¼[ ÷©ØPshÁØÔÀ HxªÀø»
(E) Answer not known
Âøh öu¯ÂÀø»
53. Self release taper arbor having diameter ranges are as follows
ö\À¨¼ì ÷h¨£º ÷é[ Bº£ß Âmh[PÎß AÍÄPÎß ©v¨£õÚx
(A) 15 to 100 mm in diameter
15 uÀ 100 ª« Áø °»õÚ Âmh[PøÍ öPõskÒÍx
(B) 16 to 100 mm in diameter
16 uÀ 100 ª« Áø °»õÚ Âmh[PøÍ öPõskÒÍx
(C) 17 to 100 mm in diameter
17 uÀ 100 ª« Áø °»õÚ Âmh[PøÍ öPõskÒÍx
(D) 18 to 100 mm in diameter
18 uÀ 100 ª« Áø °»õÚ Âmh[PøÍ öPõskÒÍx
(E) Answer not known
Âøh öu¯ÂÀø»
54. is produce more chatter mark in milling machine.
ªÀ¼[ C¯¢v zvÀ Aø»ÄÖuÀ AvP©õP HØ£kzuTi¯ \õuÚ®
(A) Stub arbor (B) Long arbor
ìh¨ Bº£º »õ[ Bº£º
(C) Draw bolt (D) Spindle
m õ ÷£õÀm ì¤ßiÀ
(E) Answer not known
Âøh öu¯ÂÀø»
21 539-Trade Machinist
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55. Choose the right matches among type
\¯õÚ Cønø¯ Psk¤iUPÄ®.
(1) Column and knee Plain milling machine
Põ»® ©ØÖ® }´ ¤øÍß ªÀ¼[ ö©]ß
(2) Fixed bed type Universal milling machine
¤U\k ö£m øh¨ ²ÛÁº\À ªÀ¼[ ö©]ß
(3) Special type Drum milling machine
ìö£\À øh¨ i ® ªÀ¼[ ö©]ß
(4) Planer type Omniversal milling machine
¤ÍõÚº øh¨ Jª²ÛÁº\À ªÀ¼[ ö©]ß
(A) (1) and (2) are correct (B) (1) and (3) are correct
(1) ©ØÖ® (2) BÚx \ (1) ©ØÖ® (3) BÚx \
(C) (2) and (3) are correct (D) (3) and (4) are correct
(2) ©ØÖ® (3) BÚx \ (3) ©ØÖ® (4) BÚx \
(E) Answer not known
Âøh öu¯ÂÀø»
56. What is D command in tool offset?
lÀ B¨ö\m CÀ D PmhøÍ GßÚ?
(A) Wear off cutter (B) Tool material
¯º B¨ Pmhº lÀ ö©mh¯À
(C) Length of cutter (D) Radius tool
ö»ßz B¨ Pmhº ÷ i¯ì lÀ
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 22
Text of page 21
57. Zero offset is expressed in a programme by the code
¨÷ õQ õªÀ ã÷ õ B¨ö\m ÷Põk Gøu SÔUQÓx
(A) X, Y and Z (B) X 0 , Y0 and Z0
(C) X10 , Y20 and Z30 (D) G 71
(E) Answer not known
Âøh öu¯ÂÀø»
58. Which is the offset from nose of the holder to overhanging length of
cutter?
Pmhº }Ízøu uõ[S® }ÍzxUS ÷íõÀhº UQ¼¸¢x Gvk Gx?
(A) Work offset (B) Wear offset
JºU B¨ö\m ¯º B¨ö\m
(C) Tool offset (D) Geometry offset
lÀ B¨ö\m â¯õö©m B¨ö\m
(E) Answer not known
Âøh öu¯ÂÀø»
59. Which M-code is defined and implement to spindles stop?
G¢u M&SÔ±k ì¤siÀPøÍ {ÖzxÁuØS Áø ¯ÖUP¨£mk
ö\¯À£kzu¨£kQÓx?
(A) M 05 (B) M 08
G® 05 G® 08
(C) M 11 (D) M 14
G® 11 G® 14
(E) Answer not known
Âøh öu¯ÂÀø»
23 539-Trade Machinist
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60. What does the word Q stand in FANUC system peak drilling cycle
syntex as G83 X-Y-Z-R-Q-F-K
FANUC ]ìh® ö£U iÀ¼[ _ÇØ]°ß öuõh¯¼À Q GßÓ ö\õÀ GßÚÁõP
EÒÍx G83 XYZRQFK?
(A) Depth
BÇ®
(B) Position of R plane
Bº uÍ® {ø»
(C) Depth of per Pass
J¸ £õêß BÇ®
(D) Number of repeates
JÆöÁõ¸ øÓ²® HÔ & CÓ[SuÀ
(E) Answer not known
Âøh öu¯ÂÀø»
61. is the composition of stellite tool material?
__________ ìöhÀø»m P¸Â¨ ö£õ¸Îß P»øÁ BS®.
(A) Cobalt, chromium and Tungsten
÷Põ£õÀm, S÷ õª¯® ©ØÖ® h[ìhß
(B) Cobalt, Nickel and Tungsten
÷Põ£õÀm, {UPÀ ©ØÖ® h[ìhß
(C) Cobalt, chromium and Nickel
÷Põ£õÀm S÷ õª¯® ©ØÖ® {UPÀ
(D) Cobalt, carbon and Tungsten
÷P£õÀm Põº£ß ©ØÖ® h[ìhß
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 24
Text of page 23
62. After the program is entered, as a command group from the
key board the machine can be run according to the program.
¦÷ õU õø© EÒÏk ö\´u ¤ÓS J¸ P©õsm SÔ¨£õP __________ R ÷£õºiÀ
C¸¢x ¦÷ õQ õªß £i C¯¢v zøu C¯UP i²®.
(A) Single block mode (B) Automatic mode
][QÒ ¤ÍõU ÷©õk Bm÷hõ÷©iU ÷©õk
(C) Edit mode (D) MDI mode
Gim ÷©õk G®.i.I. ÷©õk
(E) Answer not known
Âøh öu¯ÂÀø»
63. Feed back system also called as
¥k÷£U ]ìh® Gߣøu RÌPshÁØÔÀ Gx ö£õ¸zu©õÚx?
(A) Measuring the speed
÷ÁPzøu AÍÂh SÔ¨¤h¨£kQÓx
(B) Measuring the displacement
|P¸® öuõø»øÁ SÔ¨¤h¨£kQÓx
(C) Measuring the feed
Fmhzøu AÍÂh SÔ¨¤h¨£kQÓx
(D) Measuring the power
vÓøÚ AÍÂh SÔ¨¤h¨£kQÓx
(E) Answer not known
Âøh öu¯ÂÀø»
25 539-Trade Machinist
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64. Type of Guide way preferred to co-ordinate measuring machine is.
÷Põ Bºi÷Úm ö©\[ ªæÛÀ G¢u ÁøP¯õÚ øPk÷Áì
ußø©£kzu¨£kQÓx?
(A) Friction guideway (B) Vee guideway
L¤U\ß øPk÷Á´ì à øPk ÷Á´ì
(C) Flat guideway (D) Aerostatic guideway
L¤Íõm øPk ÷Á´ì H÷ õì÷hiU øPk ÷Áì
(E) Answer not known
Âøh öu¯ÂÀø»
65. In CNC machine the following motor is suitable for eliminating feedback
control in open loop system.
]Gß] ö©]°ßÀ RÌPsh ÷©õmh õÚx K£ß ¿¨ øÓ°À ¥k ÷£U
øÓø¯ }UP Eu¯õP EÒÍx
(A) AC servo motor (B) DC servo motor
AC \º÷Áõ ÷©õmhõº DC \º÷Áõ ÷©õmhõº
(C) Stepper motor (D) None of the above
ìöh¨£º ÷©õmhõº ÷©ØPshÁØÔÀ HxªÀø»
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 26
Text of page 25
66. slotting machine has two or three slotting heads. These
slotting heads can function Independently.
__________ ]»õmi[ ö©æß C sk AÀ»x ßÖ ]»õmi[ öímkPøÍ
öPõskÒÍx AøÁPÒ uÛzuÛ÷¯ |P¸® Aø©¨ø£ ö£ØÔ¸US®.
(A) Travelling head slotting machine
i õÁ¼[ öím ]»õmi[ ö©æß
(B) Locomotive frame slotting machine
÷»õ÷Põ÷©õmiÆ ]»õmi[ ö©æß
(C) Die slotting machine
øh ]»õmi[ ö©æß
(D) Precision tool room slotting machine
xÀ¼¯©õÚ lÀ ¹® ]»õmi[ ö©æß
(E) Answer not known
Âøh öu¯ÂÀø»
67. Rotary Table is mounted on the Top of the in slotting
machine.
]»õmi[ ö©æÛÀ __________ ß «x ÷ õmh ÷h¤Ò ö£õ¸zu¨£mkÒÍx.
(A) Saddle (B) Cross slide
÷\iÀ Q õì ìø»k
(C) Table (D) Bed
÷h¤Ò ö£m
(E) Answer not known
Âøh öu¯ÂÀø»
27 539-Trade Machinist
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68. PMS - is Related to
RÌÁ¸ÁÚÁØÖÒ PMS&Gøu SÔUQÓx
(A) Control the expenses (B) High expenses
ö\»ÄPÒ Pmk¨£kzu¨£k® ö\»ÄPÒ ªP AvP®
(C) Machine wear (D) Frequent break down
C¯¢v ÷u´©õÚ® AiUPi C¯¢v ® ¤÷ U hÄß
(E) Answer not known
Âøh öu¯ÂÀø»
69. In machine tool testing, the term backlash refers to
J¸ C¯¢v zøu £÷\õvUS®÷£õx ÷£U»õì Gߣx __________ ø¯U SÔUS®.
(A) Cutting tool wear
öÁmkÎ ÷u´©õÚ® BÁx
(B) Play between mating components
C¸ ö£õ¸mPÒ CønÁøu
(C) Reverse current in motors
÷©õmhõºPÎß ªß ¤ßÞmh®
(D) Slippage in belt drive
ö£Àm |ÊÄÁøu
(E) Answer not known
Âøh öu¯ÂÀø»
70. In lubrication system square shape is used for
¿¤÷Påß øÓ°À \x ÁiÁ® __________ £¯ß£õmøh SÔUQÓx.
(A) Daily (B) Weekly once
vÚ\ Áõ zvØS J¸øÓ
(C) Monthly once (D) Yearly once
©õuzvØS J¸øÓ Á¸hzvØS J¸øÓ
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 28
Text of page 27
71. Non-mechanical Equipment example is
ö©UPõÛUPÀ AÀ»õu E£P nzvØS GkzxUPõmk
(A) Electric panel (B) Air compressor
G»UmU ÷£ÚÀ Hº P®£÷ \º
(C) Refrigeration unit (D) Fork lift
Sͺ£uÚ A»S ÷£õºU ¼¨m
(E) Answer not known
Âøh öu¯ÂÀø»
72. Is not an important condition for preventive maintenance
uk¨¦ £ õ©¨¦US Cx J¸ UQ¯ {£¢uøÚ AÀ»
(A) Size (B) Age
AÍÄ Á¯x
(C) Location (D) Oil used
C¸¨¤h® Gsön´ £¯ß£õk
(E) Answer not known
Âøh öu¯ÂÀø»
73. For machine tools that are frequently used, its extremely important to
inspect the machines lubrication levels on a basis.
AiUPi £¯ß£kzu¨£k® C¯¢v P¸ÂPÐUS __________ C¯¢v zvß
¿¨÷P\ß AÍøÁ B´Ä ö\´Áx ªPÄ® UQ¯®.
(A) Hourly (B) Daily
J¸ ©o ÷| ® / ©o ÷| zvØS |õöÍõßÖUS / vÚ\
(C) Weekly (D) Monthly
Áõ ö©õ¸øÓ ©õuö©õ¸øÓ
(E) Answer not known
Âøh öu¯ÂÀø»
29 539-Trade Machinist
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74. The following is not a classification of maintenance.
RÌPshÁØÖÒ Gx £ õ©¨¦ ÁøPø¯ \õº¢ux AÀ»
(A) Corrective maintenance (B) Timely maintenance
\¯õÚ £ õ©¨¦ øh®¼ £ õ©¨¦
(C) Scheduled maintenance (D) Preventive maintenance
vmhªh¨£mh £ õ©¨¦ uk¨¦ £ õ©¨¦
(E) Answer not known
Âøh öu¯ÂÀø»
75. The best example lubricant is for semi liquid.
Aø v Á E¯ÄUS ]Ó¢u Euõ n®
(A) Grease (B) Graphite
Qì Q õø£m
(C) Castor oil (D) Lard oil
÷Pìhº B°À »õk B°À
(E) Answer not known
Âøh öu¯ÂÀø»
76. The temperature at which the lubricant is able to flow when poured is
¾¨Psm Gsön´ FØÓ¨£k® ÷£õx £õ²® öÁ¨£{ø»
(A) Pour point (B) Fire point
÷£õº £õ°sm £¯º £õ°sm
(C) Flash point (D) Oilness
¤Íõè £õ°sm Gsön´ ußø©
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 30
Text of page 29
77. An Automatic Lubrication system sometimes referred to as a
Lubrication system.
J¸ uõÛ¯[Q ¿¨÷Påß ]ìh® ]» ÷| [PÎÀ __________ ¿¨÷Påß
]ìh® GÚ SÔUP¨£kQÓx.
(A) Flash point (B) Centralized
¤Íõè £õ°sm ø©¯¨£kzu¨£mh
(C) Pour point (D) Fire point
÷£õº £õ°sm £¯º £õ°sm
(E) Answer not known
Âøh öu¯ÂÀø»
78. Which type of maintenance involves if a machine until it completely
breaks down?
G¢v ® ÊÁx©õP £Êx HØ£mhõÀ G¢u ÁøP¯õÚ G¢v £ õ©¨¦ øÓ
Pøh¤iUP¨£k®?
(A) Preventive maintenance (B) Predictive maintenance
¤öÁsiÆ ö©°ßhÚßì ¤UmiÆ ö©°ßhÚßì
(C) Corrective maintenance (D) Breakdown maintenance
Pö UiÆ ö©°ßhÚßì ¤÷ UhÄß ö©°ßhÚßì
(E) Answer not known
Âøh öu¯ÂÀø»
31 539-Trade Machinist
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79. Lubricant is necessary to
¿¨÷Pßm&ß AÁ]¯®
(A) Run the machine smoothly taking least load
SøÓ¢u£m\ Gøh²hß C¯¢v zøu ^ õP C¯UP
(B) Run the machine Quickly
C¯¢v zøu ÷ÁP©õP C¯UP
(C) Stop the machine immediately
C¯¢v zøu EhÚi¯õP {Özu
(D) Produce workpiece of greater accuracy
£oö£õ¸øÍ ªP ~qUP©õP u¯õUP
(E) Answer not known
Âøh öu¯ÂÀø»
80. This is solid lubricant
Cx vh ¿¨÷Psm
(A) Mineral oil (B) Fatty
ªÚ À Gsön´ öPõʨ¦
(C) Synthetic oil (D) Graphite
ö\¯ØøP Gsön´ Q õLø£m
(E) Answer not known
Âøh öu¯ÂÀø»
81. Which is used to impart a reciprocating motion the followers in a
machine?
C¯¢v zvÀ £õ÷»õÁº I ßÝ® ¤ßÝ® Aø\øÁ AÎUP Gx £¯ß£kQÓx?
(A) Gear (B) Shaft
Q¯º íõ¨m
(C) Cam (D) Clutch
÷P® U»mä
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 32
Text of page 31
82. The primary function of a cam is to convert.
÷P®ß uø»¯õ¯ £o Cøu ©õØÖÁx
(A) Reciprocating motion to rotary motion
ß ¤ß C¯UPzøu _Ǽ¯UP©õP ©õØÓÀ
(B) Rotary motion to reciprocating motion
_Ǽ¯UPzøu ß ¤ß C¯UP©õP ©õØÓÀ
(C) Up and down motion to reciprocating motion
÷©À RÌ C¯UPzøu ß ¤ß C¯UP©õP ©õØÓÀ
(D) Linear motion to angular motion
÷|º÷Põmi¯UPzøu ÷Põn C¯UP©õP ©õØÓÀ
(E) Answer not known
Âøh öu¯ÂÀø»
83. What is mZ1 in worm calculation
mZ1 Áõ® PnURmiÀ Cx GßÚ?
(A) Length of worm (B) Lead of worm
ö»ßz B¨ Áõ® ½k B¨ Áõ®
(C) Lead angle of worm (D) Tooth thickness
½k B[QÀ B¨ Áõ® lz vUÚì
(E) Answer not known
Âøh öu¯ÂÀø»
84. The name of the key which allows axial movement of the hub/pulley
when fitted on the shaft is
Aa_ ÁÈ C¯UPzvÀ C¯[S® í¨/¦ÒÎø¯ åõ¨miÀ ö£õ¸zu £¯ß£k® R
(A) Feather key (B) Gib head key
Lö£uº R ⨠öím R
(C) Woodruff key (D) Parallel sunk key
Em L¨ R ÷£ »À \[ R
(E) Answer not known
Âøh öu¯ÂÀø»
33 539-Trade Machinist
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85. Formula for Total Depth of Bevel Gear is in Diametral pitch.
h¯õ«mh À ¤ma ö£ÁÀ Q¯À ö©õzu BÇzøu Põn EuÄ® `zv ®
1.157 2.157
(A) (B)
DP DP
3.157 4.157
(C) (D)
DP DP
(E) Answer not known
Âøh öu¯ÂÀø»
86. Calculate the pitch diameter of bevel gear given module = 3, No. of
Teeth = 24
£ÁÀ Q¯ß ¤ma h¯õ «mhø PnUQkP. ©õkÀ = 3, £ØPÎß GsoUøP =
24
(A) 48 mm (B) 56 mm
48 ª« 56 ª«
(C) 64 mm (D) 72 mm
64 ª« 72 ª«
(E) Answer not known
Âøh öu¯ÂÀø»
87. Hand Reamers have straight shanks with square at the end for holding
with
÷ísm ©º ÷| õÚ ÷å[øP öPõskÒÍx Cuß øÚ°À EÒÍ \x ÁiÁ®
__________ »® ¤iUP EuÄQÓx.
(A) Tap wrench (B) Pipe wrench
÷h¨ ga ø£¨ ga
(C) Die stock (D) Spanners
øh ìhõU ì÷£ÚºPÒ
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 34
Text of page 35
93. The radial distance between the pitch circle and the root circle is
¤a \ºQμ¸¢x ¹m \ºQÐUS B zvß ÁÈ÷¯ EÒÍ y ®
(A) Addendum (B) Dedendum
Ahßh® ihßh®
(C) Circular pitch (D) Land
\ºS»º ¤ma ÷»ßm
(E) Answer not known
Âøh öu¯ÂÀø»
94. While cutting rack, the gear cutter should be fixed on the arbor
£Ø\mh® öÁmk®÷£õx ^Ózvß «x £Ø\UP öÁmi ö£õ¸zu¨£h ÷Ásk®
(A) Nearer to the column (B) Nearer to the arbor support
yqUS A¸QÀ ^Óa_ uõ[Q¯¸QÀ
(C) At the middle (D) At any point along the arbor
ø©¯£õPzvÀ ^Óa]ß «x HuõÁx KhzvÀ
(E) Answer not known
Âøh öu¯ÂÀø»
95. The addendum of a rack gear is equal to the
J¸ ÷ U Q¯ß Ahsh® __________ ØS \©® BS®.
(A) Module (B) Teeth
©õkÀ jz
(C) Linear pitch (D) Dedendum
½Û¯º ¤ma ihsh®
(E) Answer not known
Âøh öu¯ÂÀø»
37 539-Trade Machinist
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96. is the radial distance between the pitch circle and the root
circle and is denoted by hf
Cx __________ ¤ma \ºQÒ ©ØÖ® ¹m \ºUQÒ CÁØÔØQøh£mh ÷ i¯À
y ©õS® AuøÚ hf GÚ SÔ¨¤h»õ®
(A) Base circle (B) Addendum
÷£ì \ºUQÒ Aöhsh®
(C) Dedendum (D) Land
ihsh® ÷»sm
(E) Answer not known
Âøh öu¯ÂÀø»
97. To measure tooth thickness by using of
£À¼ß PÚ® AÍUP Cøu E£÷¯õQ
(A) Universal vernier caliper (B) Gear tooth vernier caliper
ö£õx öÁºÛ¯º Põ¼¨£º £Ø\UP £À öÁºÛ¯º Põ¼¨£º
(C) Disc micrometer (D) Inside micrometer caliper
umk ø©U÷ õ «mhº Em¦Ó ø©U÷ õ «mhº Põ¼¨£º
(E) Answer not known
Âøh öu¯ÂÀø»
98. 2.5 module helical rack with 15 helix angle find Normal tooth
thickness?
2.5 ©õlÀ ©ØÖ® 15 öí¼Uì B[QÒ öPõsh öí¼UPÀ ÷ UQß |õº©À lz
vUöÚì PshÔP.
(A) 3.93 mm (B) 7.86 mm
(C) 5.62 mm (D) 3.12 mm
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 38
Text of page 37
99. The lengthy rack blank is held
}Í©õÚ £Ø\mh vh® CÆÁõÖ øÁUP¨£kQÓx
(A) Direct on the table with clamps
÷| õP ÷©ø\°À CÖUQ²hß
(B) On the block vice
vh¨¤i¨£õß ÷©À
(C) Between two machine vice
C sk C¯¢v ¤i¨£õß ø©¯zvÀ
(D) On two magnetic chucks
C sk Põ¢uU PÆ°À
(E) Answer not known
Âøh öu¯ÂÀø»
100. 2.5 module helical rack with 15 helix angle find linear pitch.
2.5 ©õlÀ ©ØÖ® 15 öí¼Uì B[QÒ öPõsh öí¼UPÀ ÷ UQß ½Û¯º
¤ma GßÚ?
(A) 3.93 mm (B) 4.24 mm
(C) 8.14 mm (D) 7.86 mm
(E) Answer not known
Âøh öu¯ÂÀø»
101. Which part of the pedestal grinder support the work while grinding?
Qø si[ ö\´²® ÷£õx £oö£õ¸øÍ uõ[Q £¯ß£k® ö£hìhÀ
Qø shß £õP®
(A) Base (B) Body
÷£ì £õi
(C) Work rest (D) Wheel guard
JºU ö ìm ÃÀ Põºk
(E) Answer not known
Âøh öu¯ÂÀø»
39 539-Trade Machinist
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102. What will happen if run a grinding without truing?
m¹°[ (truing) ö\´¯õ©À Qø shø C¯UQÚõÀ GßÚ {PÊ®?
(A) Excessive vibration (B) Get better surface
AvP©õP AvºÄ C¸US® |À» £ ¨¦ QøhUS®
(C) Less metal removed (D) More metal removed
SøÓÁõP E÷»õP® }UP¨£k® AvP E÷»õP® }UP¨£k®
(E) Answer not known
Âøh öu¯ÂÀø»
103. What is the distance a drill advances in one rotation while drilling?
iÀ¼[ ö\´øP°À iÀ ¤m J¸ Ê _ØÖUS |P¸® öuõø»Ä Gߣx GßÚ?
(A) Feed (B) Depth of cut
Fmh® (Feed) öÁmk® BÇ®
(C) Cutting speed (D) Cutting Length
öÁmk® ÷ÁP® öÁmk® }Í®
(E) Answer not known
Âøh öu¯ÂÀø»
104. is the cause of chatter marks on workplace while grinding.
Qø si[ ö\´²®÷£õx £o¨ö£õ¸Îß «x \õmhº ©õºU ÂÊÁuØS Põ n®
(A) Wheel out of centre
ÃÀ ø©¯zøu Âmk »Q C¸zuÀ
(B) Incorrect wheel grade
Ã¼ß u ® \¯õP CÀ»õ©À C¸¨£x
(C) Wheel is too soft
ÃÀ ªPÄ® ö©ßø©¯õP C¸¨£x
(D) Dirty coolant
©õ_ P»¢u T»sm
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 40
Text of page 39
105. What is the name of the part of the file marked X?
£hzvÀ X&GÚ SÔ¨¤h¨£k® Lø£¼ß £õPzvß ö£¯º GßÚ?
(A) Tip (B) Heal
i¨ (Tip) îÀ (Heal)
(C) Tang (D) Shoulder
÷h[ (Tang) ÷åõÀhº (Shoulder)
(E) Answer not known
Âøh öu¯ÂÀø»
106. Which is the most suitable pitch for hack saw blade for cutting high
carbon steel?
øí Põº£ß ìjø» AÖUP £¯ß£kzu¨£k® ÷íU\õ ¤÷Íiß ö£õ¸zu©õÚ
¤a Gx?
(A) 0.8 mm (B) 1.0 mm
(C) 1.4 mm (D) 1.8 mm
(E) Answer not known
Âøh öu¯ÂÀø»
41 539-Trade Machinist
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Text of page 40
107. For the correct location and seating of the divider point prick punch
marks of __________ are used.
iøÁhº £õ´smiß \¯õÚ Ch® £kzu¾US® ©ØÖ® Ax |ßS A© Ä®
__________ ¨U £ga ©õºUì £¯ß£kzu¨£kQÓx.
(A) 10 (B) 15
(C) 25 (D) 30
(E) Answer not known
Âøh öu¯ÂÀø»
108. Marking table is made of
©õºUQ[ ÷h¤Ò __________ E÷»õPzuõÀ ö\´¯¨£mkÒÍx.
(A) Cast Iron (B) Mild steel
÷Pìm A¯ºß ø©Àk ìjÀ
(C) High speed steel (D) High carbon steel
øí ì¥k ìjÀ øí Põº£ß ìjÀ
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 42
Text of page 41
109. Which type of cut file shown in figure?
£hzvÀ Põn¨£kÁx G¢u ÁøP Pm ø£À?
(A) Rasp cut file (B) Curved cut file
õì¨ Pm ø£À PºÆk Pm ø£À
(C) Double cut file (D) Single cut file
h¦Ò Pm ø£À ][QÒ Pm ø£À
(E) Answer not known
Âøh öu¯ÂÀø»
110. What is the angle of counter sink rivet head?
PÄshº ê[U Âm&ß ÷Põn® GßÚ?
(A) 75 (B) 80
(C) 90 (D) 120
(E) Answer not known
Âøh öu¯ÂÀø»
43 539-Trade Machinist
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Text of page 42
111. The point angle of centre punch is
ö\ßhº £g]ß £õ°sm B[QÒ
(A) 30 (B) 60
(C) 90 (D) 120
(E) Answer not known
Âøh öu¯ÂÀø»
112. is the datum from which measurement and setting are made
in vernier height gauge.
__________ Gߣx öÁºÛ¯º øím ÷Pâß Aø©¨¦ ©ØÖ® AÍÃk ö\´²®
Buõ ©õP C¸UQÓx.
(A) Base (B) Beam
L÷£ì (Ai¨£õP®) ¥®
(C) Vernier slide (D) Scriber
öÁºÛ¯º ìø»k ìQø £º
(E) Answer not known
Âøh öu¯ÂÀø»
113. Among the following is not the use of try square?
¤ßÁ¸ÁÚÁØÖÒ Gx mø ìöPõ¯ß £¯ß AÀ»?
(A) Check the flatness of surface
÷©Ø£ ¨¤ß umøh¯õÚ ußø©ø¯ \£õºUP
(B) Mark lines at 90 to the edges of workpiece
£o¨ö£õ¸Îß Âή¦PÎÀ 90 ©õºUQ[ ö\´¯
(C) Measure the Angles
÷Põnzøu AÍÂh
(D) Set the workpiece at right angle
£o¨ö£õ¸øÍ \¯õÚ ÷PõnzvÀ Aø©zvh
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 44
Text of page 43
114. The size of a vernier height gauge is specified by
öÁºÛ¯º øím ÷Pä AÍøÁ __________ SÔ¨¤kQÓx.
(A) Width of beam
¥ªß AP»®
(B) Height of beam
¥ªß E¯ ®
(C) Weight of height gauge
øím ÷Pâß Gøh
(D) Size of scriber
ìQø £ß AÍÄ
(E) Answer not known
Âøh öu¯ÂÀø»
115. Try-squares are specified according to the of the blade.
mø ìöPõ¯ºPÒ, ¤÷Íiß __________ ö£õÖzx SÔ¨¤h¨£kQßÓÚ.
(A) Diameter (B) Thickness
Âmh® ui©ß
(C) Weight (D) Length
Gøh }Í®
(E) Answer not known
Âøh öu¯ÂÀø»
45 539-Trade Machinist
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Text of page 44
116. The four main parts of combination sets are protractor head, square
head, centre head and
Põ®¤÷Ú\ß ö\mPÎß |õßS UQ¯ £õP[PÒ øÓ÷¯ ¦ m õUhº öím,
ìöPõ¯º öím, ö\ßhº öím ©ØÖ® __________ BS®.
(A) Slide (B) Lock screw
]ø»k »õU ìS¸
(C) Rule (D) Spirit level
¹À ì¤m ö»ÁÀ
(E) Answer not known
Âøh öu¯ÂÀø»
117. Surface gauge base is made of steel or cast iron with a at the
bottom. It helps to seat on circular work.
\º÷£ì ÷Pä Ai¨£Sv GLS AÀ»x Áõº¨¤¸®¦PÍõÀ BÚx, Ai¨£Sv°À
__________ ÁiÂÀ EÒÍx. Cx Ámh ÷Áø»PÎÀ A© EuÄQÓx.
(A) FLAT (B) ROUND
¤Íõm Äsm
(C) 'V' - Groove (D) T - SLOT
V - S¹Æ T - ì»õm
(E) Answer not known
Âøh öu¯ÂÀø»
118. The distance between adjacent teeth is known as the of the
hack saw blade.
÷íUéõ ¤÷ÍiÀ A¸P¸÷P EÒÍ £ØPÐUS Cøh°»õÚ y ® __________
GÚ¨£k®.
(A) Length (B) Weight
}Í® Gøh
(C) Pitch (D) Diameter
¤ma Âmh®
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 46
Text of page 45
119. For cutting soft material, the most suitable pitch of the Hacksaw blade is
ö©ßø©¯õÚ E÷»õP[PøÍ Pmi[ ö\´¯ AvP uSv¯õÚ ¤mø\ öPõsh
íõUéõ ¤÷Ík
(A) 1.8 mm (B) 1.4 mm
(C) 1.0 mm (D) 0.8 mm
(E) Answer not known
Âøh öu¯ÂÀø»
120. __________ punch used for good seating and starting the drill.
__________ £g\õÚx iÀ B ®¤¨£uØS |ßS ønø¯ A© ö\´¯
£¯ß£kQÓx.
(A) Dot punch (B) Prick punch
hõm £ga ¤U £ga
(C) Hollow punch (D) Centre punch
íõ÷»õ £ga ö\ßhº £ga
(E) Answer not known
Âøh öu¯ÂÀø»
121. Which one of the following threads are used to fastening purpose?
RÌPsh ©ø PÒ G¢u JßÖ CønUS® ÷Áø»PЮ £¯ß£kzu¨£kQÓx
(A) Metric Thread (B) Acme Thread
ö©mU ©ø PÒ AUª ©ø PÒ
(C) Tapered Threads (D) Whit worth Threads
÷h¨£º ©ø PÒ Âm öÁõºz ©ø PÒ
(E) Answer not known
Âøh öu¯ÂÀø»
47 539-Trade Machinist
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Text of page 46
122. is the pitch of a threads with 10 thread per inch (TPI)?
10 TPI öPõsh ©ø °ß ¦°øh y ® __________ BS®.
(A) 10 mm (B) 2.54 mm
10 ª« 2.54 ª«
(C) 0.1 inch (D) 0.1 mm
0.1 A[S»® 0.1 ª«
(E) Answer not known
Âøh öu¯ÂÀø»
123. Simple gear train arrangement consists of three gears ,
and
]®¤Ò Q¯º mø ß Aø©¨£õÚx __________ , __________ ©ØÖ® __________ BQ¯
Áø\°À Aø©UP¨£mhx.
(A) Driver, driven, driver
iø Áº, iø Áß, iø Áº
(B) Driver, intermediate, driven
iø Áº, Cßhº«i¯m, iø Áß
(C) Driven, driver, driven
iø Áß, iø Áº, iø Áß
(D) Driver, intermediate, driver
iø Áº, Cßhº«i¯m, iø Áº
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 48
Text of page 47
124. are used for supporting long workpiece held in a chuck or
between lathe centres
÷»z \U AÀ»x C sk ö\ßhºPÐUS Cøh÷¯¯õÚ ø©¯zvÀ £o¨ö£õ¸øÍ
¤iUP __________ EuÄQÓx.
(A) Mendrels (B) Catch plates
©õsmºÀì ÷Pma ¤÷Ímì
(C) Face plates (D) Steady Rests
L÷£ì ¤÷Ímì ìöhi ö ìm
(E) Answer not known
Âøh öu¯ÂÀø»
125. The included angle of metric V thread is
ö©mU V ©ø °ß EÒ÷Põn®
(A) 60 (B) 55
(C) 471/2 (D) 45
(E) Answer not known
Âøh öu¯ÂÀø»
126. taper is mostly used in die making machines.
CÆÁøP ÷h¨£ºPÒ øh (Die) u¯õUS® C¯¢v [PÎÀ £¯ß£kQÓx
(A) Morse taper
÷©õºì ÷h¨£º
(B) Brown and sharp taper
¤ö Íß ©ØÖ® åõº¨ ÷h¨£º
(C) Jarno taper
öáº÷Úõ ÷h¨£º
(D) Standard pin taper
ìhõshºk ¤ß ÷h¨£º
(E) Answer not known
Âøh öu¯ÂÀø»
49 539-Trade Machinist
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127. If taper angle is not given for compound rest method of taper turning can
be used this formula.
÷h¨£º ÷Põn AÍÄ Põ®£Äsm ö ìm øÓ°À öPõkUPÂÀø»ö¯ßÓõÀ
RÌPsh `zv zøu £¯ß£kzu»õ®
D d l
(A) sin (B) tan
l D d
D d D d
(C) sin (D) tan
2l 2l
(E) Answer not known
Âøh öu¯ÂÀø»
128. Removing metal to form a surface at an angle to the axis of the metal is
called
E÷»õP Aa_US J¸ ÷PõnzvÀ J¸ ÷©Ø£ ¨ø£ E÷»õP ÁiÁzv¼¸¢x }US®
Pøh\À øÓ __________ BS®.
(A) Plain Turning (B) Step Turning
¤øÍß hºÛ[ ìöh¨ hºÛ[
(C) Taper Turning (D) Facing
÷h¨£º hºÛ[ L÷£][
(E) Answer not known
Âøh öu¯ÂÀø»
129. method is used to taper turning by compound rest swiveled
for short length taper.
SøÓ¢u }Í® EÒÍ ÷h¨£ºPøÍ E¸ÁõUP Põ®£Äsm ö ìøh _ÇØÔ
__________ øÓø¯ £¯ß£kzv ÷h¨£º Pøh\À ö\´¯¨£kQÓx.
(A) Tool offset (B) Compound slide
lÀ B¨ö\m Põ®£Äsk ìø»k
(C) Tailstock offset (D) Form tool
öh°ÀìhõU B¨ö\m L£õ® lÀ
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 50
Text of page 49
130. is the formula for find out the angle of taper.
\Âß ÷Põnzøu Psk¤iUP EuÄ® `zv ®
d D d D
(A) Tan (B) Tan
2 l l
D d D d
(C) Tan (D) Tan
2 l l
(E) Answer not known
Âøh öu¯ÂÀø»
131. M 12 1.25 designation of ISO metric thread if M denotes by
M 12 1.25 SÔ±k ISO ö©mU v miÀ M Gߣx __________ BS®.
(A) Millimeter (B) Meter
ªÀ¼ «mhº «mhº
(C) Miles (D) Metric
ø©Àì ö©mU
(E) Answer not known
Âøh öu¯ÂÀø»
51 539-Trade Machinist
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Text of page 50
132. What is Name of this mandrel?
C¢u Mandrel&ß ö£¯º GßÚ?
(A) Gang Mandrel
÷P[ ÷©siÀ
(B) Stepped Mandrel
ì÷h¨¦k ÷©siÀ
(C) Standard solid Mandrel
ì÷hs÷hºk \õ¼k ÷©siÀ
(D) Taper shank Mandrel
÷h¨£º åõ[ ÷©siÀ
(E) Answer not known
Âøh öu¯ÂÀø»
133. Which type of lathe centre can be used only for soft metal jobs?
ö©ßø©¯õÚ E÷»õP¨ ö£õ¸ÒPøÍ uõ[SÁuØS¨ £¯ß£k® ÷»z ö\ßhº
Gx?
(A) Pipe centre
ø£¨ ö\ßhº
(B) Tipped centre
i¨¦k ö\ßhº
(C) Revolving centre
ÁõÀÂ[ ö\ßhº
(D) Self driving live centre
ö\ÀL¨ iø Â[ ø»Æ ö\ßhº
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 52
Text of page 51
134. How can be produced duplicate tapers in a most suitable method of
turning tapers in lathe?
G¢u ÷h¨£º hºÛ[ ö©zuhõÚx k¨Î÷Pm ÷h¨£º (duplicate taper) E¸ÁõUP
ªPÄ® EP¢ux?
(A) Combined feed method
P®ø£ßm L¥k ö©zuk
(B) Taper turning attachment
÷h¨£º hºÛ[ Amhõaö©sm
(C) Tail stock set over method
öh°À ìhõU ö\m KÁº ö©zuk
(D) Compound rest swivelling method
Põ®£Äsm ö ìm v¸¨¦® øÓ
(E) Answer not known
Âøh öu¯ÂÀø»
135. Which method of taper turning is used to make internal taper and
external taper?
CßhºÚÀ ©ØÖ® GUìhºÚÀ ÷h¨£º E¸ÁõUP¨ £¯ß£k® ÷h¨£º hºÛ[
øÓ°ß ö£¯º GßÚ?
(A) Tail stock off set method
öh°À ìhõU B¨L ö\m ö©zuk
(B) Form tool method
L£õº® lÀ ö©zuk
(C) Taper turning Attachment method
÷h¨£º hºÛ[ Amhõaö©sm ö©zuk
(D) Compound slide swivelling method
Põ®£Äsm ]ø»k v¸¨¦® øÓ
(E) Answer not known
Âøh öu¯ÂÀø»
53 539-Trade Machinist
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136. Self - holding taper in Example.
ö\À¨ ÷íõÀi[ ÷h¨£ºUS J¸ GkzxUPõmk
(A) Taper shank drills (B) Milling Arbors
÷h¨£º åõ[U iÀ ªÀ¼[ Bº£º
(C) Twist drills (D) Spade drill
kÂìm iÀ ì÷£k iÀ
(E) Answer not known
Âøh öu¯ÂÀø»
137. What is the counter sink pilot diameter?
PÄshº ][Qß £´»m øh¯õ«mhº (Âmh®) GßÚ?
(A) 1.5 mm (B) 1.6 mm
(C) 1.8 mm (D) 2.0 mm
(E) Answer not known
Âøh öu¯ÂÀø»
138. Top rake of a tool is
öÁmk롧 ÷©À \õ´Ä ÷Põn®
(A) To avoids rubbing of tool with work
£o¨ö£õ¸Ðhß öÁmkίõÚx E õ´Áøu uºUS®
(B) Allows the chip to flow freely
¤]ÖPÒ GÎuõP öÁÎ÷¯Ó EuÄ®
(C) Increases the heat generation
öÁ¨£zøu AvP©õP HØ£kzx®
(D) Avoids chips to flow
¤]Ö öÁÎ÷¯ØÓzøu ukUS®
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 54
Text of page 53
139. Tools which are made throughout from a cutting tool material is known
as
ÊÁx©õP öÁmk® E÷»õPzvÚõÀ ö\´¯¨£mh öÁmkÎPøÍ __________
GßÖ TÓ»õ®.
(A) Butt welded tool (B) Tapped tool
£m £ØÓøÁUP¨£mh öÁmkÎ øÚ öÁmkÎ
(C) Solid tool (D) Carbide tool
vh öÁmkÎ Põºø£k öÁmkÎ
(E) Answer not known
Âøh öu¯ÂÀø»
140. In one type of tools is not include, types of lathe cutting tools
÷»z ö©æÛÀ øh¨ì B¨ Pmi[ lÀ JßÖ Á õx
(A) Solid type tools
vh ÁøP öÁmkÎ
(B) Brazed type tools
¤÷ ìk ÁøP öÁmkÎ
(C) Throw away types tools
yUQ GÔ¯¨£k® öÁmkÎ
(D) Milling cutter tools
ªÀ¼[ Pmhº öÁmkÎ
(E) Answer not known
Âøh öu¯ÂÀø»
55 539-Trade Machinist
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Text of page 54
141. is used for changing the direction of rotation of the lead screw
and feed shaft.
__________ BÚx ÷»zvß ½m ìU¸ ©ØÖ® L¥k åõ¨iß _ÇÊ® vø\ø¯ ©õØÓ
£¯ß£kQÓx.
(A) Ratchet and Pawl mechanism
ö m\m ©ØÖ® £õÀ ö©UPõÛ\®
(B) Bull gear mechanism
¦À Q¯º ö©UPõÛ\®
(C) V belt drive
V&ö£Àm iø Æ
(D) Tumbler gear mechanism
h®£Íº Q¯º ö©UPõÛ\®
(E) Answer not known
Âøh öu¯ÂÀø»
142. Angle is ground on the parting tools on both sides.
£õºmi[ l¼ß C sk £UP® Q Äsi[ ö\´¯UTi¯ B[QÒ __________
BS®.
(A) End cutting edge Angle (B) Side cutting edge Angle
Gsk Pmi[ Gmä B[QÒ ø\k Pmi[ Gmä B[QÒ
(C) Side Relief Angle (D) Rake Angle
ø\k ½¨ B[QÒ ÷ U B[QÒ
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 56
Text of page 55
143. The Angle of the tool is ground on the top of the Lathe tool.
÷»z l¼ß ÷©À £UPzvÀ Qø si[ ö\´¯¨£k® ÷Põn® __________ BS®.
(A) Side cutting edge Angle (B) Top rake Angle
ø\k Pmi[ Gmä B[QÒ hõ¨ ÷ U B[QÒ
(C) Clearance Angle (D) End cutting Edge Angle
Qί ßì B[QÒ Gsk Pmi[ Gmä B[QÒ
(E) Answer not known
Âøh öu¯ÂÀø»
144. metal is used for brazed type lathe tool.
__________ E÷»õP® ¤÷ ìk øh¨ ÁøP ÷»z l¾US £¯ß£kzu¨£kQÓx.
(A) Low carbon steel
÷»õ Põº£ß ìjÀ
(B) High carbon steel
øí Põº£ß ìjÀ
(C) High speed steel
øí ì¥k ìjÀ
(D) Tungsten carbide
h[ìhß Põºø£k
(E) Answer not known
Âøh öu¯ÂÀø»
57 539-Trade Machinist
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145. The multipoint cutting tool on the Lathe machine to hold in the
and feeding to the work.
÷»z ö©æÛÀ EÒÍ ©Ài £õ°sm Pmi[ lø» __________ À ¤izx
£o¨ö£õ¸ÐUS Fmh©ÎUP¨£kQÓx.
(A) Tail stock
öh°À ìhõU
(B) Carriage
÷P÷ ä
(C) Study Rest
ìöhi ö ìk
(D) Saddle
÷\iÀ
(E) Answer not known
Âøh öu¯ÂÀø»
146. The side relief angle normally does not exceed
ø\k ½L¨ B[QÍõÚx ö£õxÁõP __________ US AvP©õP C¸UPU Thõx.
(A) 2 (B) 3
(C) 4 (D) 6
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 58
Text of page 57
147. The Apron mechanism has an Arrangement for transmitting the drive
from to in Lathe machine.
÷»z ö©æÛÀ H¨ õß ö©UPõÛ\® BÚx __________ ¼¸¢x __________ ØS
C¯UPzøu Phzu £¯ß£kQÓx.
(A) Head stock to carriage
öímìhõU, ÷P÷ ä
(B) Carriage to saddle
÷P÷ ä, ÷\iÀ
(C) Saddle to feed shaft
÷\iÀ, L¥k \õ¨m
(D) Feed shaft to saddle
L¥k \õ¨m, ÷\iÀ
(E) Answer not known
Âøh öu¯ÂÀø»
148. Lathe tool life most commonly expressed in
ö£õxÁõP ÷»z l¼ß B²mPõ»® __________ BÀ SÔUP¨£kQÓx.
(A) Second (B) Minute
ÂÚõi {ªh®
(C) Week (D) Day
Áõ ® |õÒ
(E) Answer not known
Âøh öu¯ÂÀø»
59 539-Trade Machinist
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149. Taper is provided in tailstock barrel?
öh°À ìhõU ÷£ ¼À öPõkUP¨£mkÒÍ ÷h¨£ß ÁøP?
(A) Jarno taper
áº÷Úõ ÷h¨£º
(B) Morse taper
÷©õºì ÷h¨£º
(C) Brown and sharpe taper
¤ Äß ©ØÖ® åõº¨ ÷h¨£º
(D) BT taper
BT ÷h¨£º
(E) Answer not known
Âøh öu¯ÂÀø»
150. is an operation performed on lathe machine where the excess
material is removed from the work piece to obtain various steps at
different diameters.
÷»z ö©æÛÀ £oö£õ¸ÎÀ EÒÍ AvP¨£i¯õÚ E÷»õPzøu }UQ AÁØÔÀ
öÁÆ÷ÁÖ ÂmhÒÍ £i{ø»PøÍ E¸ÁõUS® øÓ
(A) Facing (B) Plain turning
L÷£][ ¨øÍß hºÛ[
(C) Knurling (D) Step turning
|º¼[ ìöh¨ hºÛ[
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 60
Text of page 59
151. Knurling is the operation of
|º¼[ Gߣx __________ B¨÷ åß BS®
(A) Shearing (B) Forming
æ¯[ L£õºª[
(C) Turning (D) Pressing
hºÛ[ ¤ ê[
(E) Answer not known
Âøh öu¯ÂÀø»
152. Reaming process is also called as
ª[ ÷Áø»¯õÚx J¸
(A) Rough process
ö\õ ö\õ £õÚ ÷Áø»
(B) Semi finishing process
£õv Êø© £kzx® ÷Áø»
(C) Finishing process
Êø©¯õUP¨£mh ÷Áø»
(D) None of the above
÷©ØPshÁØÔÀ HxªÀø»
(E) Answer not known
Âøh öu¯ÂÀø»
61 539-Trade Machinist
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153. The turning operation is performed by lathe, the final shape of the work
is
÷»vÀ hºÛ[ ÷Áø» ö\´u¤ß CÖv¯õP £o ö£õ¸Îß E¸Á©õÚx
(A) Diameter sized
ÂmhzvÀ SøÓ²®
(B) Length sized
}ÍzvÀ SøÓ²®
(C) Neither Dia nor Length is sized
Âmh® ©ØÖ® }Í® BQ¯ C si¾® SøÓ¯õx
(D) None of the above
÷©ØPshÁØÔÀ HxªÀø»
(E) Answer not known
Âøh öu¯ÂÀø»
154. The major cutting force considered during orthogonal cutting is
ö\[Szx öÁmk® C¯UPzvß \©¯® P¸zvÀ öPõÒÍ ÷Ási¯ ö£¯ öÁmk
Âø\
(A) Tangential (B) Axial
öuõk÷Põmk Âø\ Aa_\õº Âø\
(C) Radial (D) Centrifugal
Bø Âø\ |kÁs »UP Âø\
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 62
Text of page 61
155. In a lathe part, Loose Headstock is also called as
÷»zvß ¿ì öímìhõU GÚ AøÇUP¨£k® £õP©õÚx
(A) Carriage (B) Tailstock
÷P÷¯ä öh´ÀìhõU
(C) Saddle (D) Tool post
÷\iÀ lÀ ÷£õìm
(E) Answer not known
Âøh öu¯ÂÀø»
156. There is no feed box, lead screw and carriage unit, such type of lathe is
as follows
¥k £õUì, ö»mìS¸ ©ØÖ® ÷P÷ ä ÷£õßÓ E¸¨¦PøÍ ußÚPz÷u
öPõsi õu ÷»vß ÁøP¯õÚx
(A) Centre Lathe
ö\ßhº ÷»z
(B) Bench Lathe
ö£ga ÷»z
(C) Speed Lathe
ì¥k ÷»z
(D) Capston and Turret lathe
÷P¨mìhß ©ØÖ® h m ÷»z
(E) Answer not known
Âøh öu¯ÂÀø»
63 539-Trade Machinist
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157. Denote the X marked in lathe parts?
£hzvÀ X GÚ SÔ¨¤h¨£mh ÷»z £õPzvß ö£¯ø SÔ¨¤k
(A) Tool post (B) Top slide
lÀ ÷£õìm hõ¨ ìø»k
(C) Cross slide (D) Swivel base
Q õì ìø»k ìøÁÁÀ ÷£ì
(E) Answer not known
Âøh öu¯ÂÀø»
158. part of the lathe to hold cutting tools drills, reamers, drill
chucks provided with the taper shanks.
÷»zvß __________ £õP® ÷h¨£º ÷å[UShß Ti¯ iÀ, ©ºì, iÀ \U
÷£õßÓ Pmi[ lÀPøÍ ¤iUP £¯ß£kQÓx
(A) Carriage (B) Head Stock
÷P÷ ä öím ìhõU
(C) Tail Stock (D) Lathe Chuck
öh°À ìhõU ÷»z \U
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 64
Text of page 63
159. What is the purpose of steady rest in a lathe machine.
÷»z ö©æÛÀ ìöhi ö ìmiß ÷|õUP® GßÚ?
(A) To support a long job
}Í©õÚ £o¨ö£õ¸øÍ uõ[P
(B) To support a shorter job
}Í® SøÓÁõÚ £o¨ö£õ¸øÍ uõ[P
(C) To support a large diameter job
AvP Âmh® öPõsh £o¨ö£õ¸øÍ uõ[P
(D) To support an irregular shape job
JÊ[PØÓ ÁiÁ® öPõsh £o¨ö£õ¸øÍ uõ[P
(E) Answer not known
Âøh öu¯ÂÀø»
160. Knurling is done on
|º½[ ö\´²® £ ¨¦ BÚx
(A) Flat surface (B) Cylindrical surface
£kUøP Á\ £ ¨£ÍÄ E¸øÍ ÁiÁ £ ¨£ÍÄ
(C) Concave surface (D) Convex surface
SÈ £ ¨£ÍÄ S £ ¨£ÍÄ
(E) Answer not known
Âøh öu¯ÂÀø»
65 539-Trade Machinist
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161. A universal tool and cutter grinder preferred over a plain grinder for
¤øÍß Qø si[ C¯¢v zøuÂh __________ ÷Áø»£õmiØPõP ²ÛÁº\À lÀ
Asm Pmhº Qø shº C¯¢v ® £¯ß£kzu¨£kQÓx.
(A) It has costly parts
AvP Âø»²ÒÍ £õP[PøÍ öPõskÒÍuõÀ
(B) Very high speed
AvP ÷ÁPzvÀ ÷Áø»ö\´ÁuõÀ
(C) It uses more electricity
AvP ªß\õ zøu E£÷¯õQ¨£uõÀ
(D) Grind various complex shapes and angles
£À÷ÁÖ¨£mh PiÚ ÁiÁ[PøͲ® ÷Põn[PøͲ® Qø si[
ö\´ÁuõÀ
(E) Answer not known
Âøh öu¯ÂÀø»
162. In Tool and cutter grinding machine, use of radius wheel turning
attachment is
P¸Â ©ØÖ® Pmhº Qø shÀ ÷ i¯ì ÃÀ hºÛ[ Cøn¨¤ß £¯ß£õk
(A) Dress the wheel to the required radius upto 25 mm
25 ª« Áø ÷uøÁ¯õÚ B ® Áø \UP zøu ^ ø©¨¦ ö\´¯
(B) Turn the work piece to any required shape
÷Áø»¨ £Svø¯ ÷uøÁ¯õÚ ÁiÁzvØS ©õØÓÄ®
(C) Turn the work piece to a radius up to 12 mm
÷Áø»¨ £Svø¯ 12 ª« Áø °»õÚ B ® Áø ©õØÓÄ®
(D) Dress the wheel to any required shape
\UP zøu ÷uøÁ¯õÚ G¢u ÁiÁzv¾® A»[PUPÄ®
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 66
Text of page 65
163. Where is tooth rest fitted in tool and cutter grinder?
P¸Â ©ØÖ® Pmhº Qø shº BQ¯ÁØÔß lz ö ìm G[÷P
ö£õ¸zu¨£mkÒÍx?
(A) Tooth rest attachment (B) In between centres
lz ö ìm Cøn¨¦ ø©¯[PÐUS Cøh°À
(C) Tail stock (D) Column
öh°À ìhõU ö|kÁø\
(E) Answer not known
Âøh öu¯ÂÀø»
164. The table is mounted on in tool and cutter grinding machine.
lÀ Asm Pmhº Qø si[ ö©æÛÀ ÷h¦Ò Guß ÷©À ö£õ¸zu¨£mkÒÍx?
(A) Column (B) Saddle
ö|kÁø\ ÷\iÀ
(C) Base (D) Bed
÷£ì ö£m
(E) Answer not known
Âøh öu¯ÂÀø»
165. To increase the life of a milling cutter it is to be as soon as it
becomes blunt or dull.
ªÀ¼[ Pmhß B²øÍ AvPUP Ax ©Ê[Q¯Ähß ö\´¯ ÷Ási¯x
(A) Change (B) Broke
©õØÖuÀ EøhzuÀ
(C) Re-sharpened (D) Wear
©Ö Tºø©¯õUSuÀ ÷u´¢x ÷£õuÀ
(E) Answer not known
Âøh öu¯ÂÀø»
67 539-Trade Machinist
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166. Which the following factor not affecting the selection of structure in
Grinding wheel
Qø si[ ÃÀ ÷uºÂÀ Pmhø©¨ø£ £õvUPõu ¤ßÁ¸® Põ o Gx?
(A) Soft and Tough material Open structure
ö©ßø© (©) vhzußø© E÷»õP® vÓ¢u Aø©¨¦
(B) Heavy cut Dense structure
AvP©õP Pm GkUP Ahºzv¯õÚ Aø©¨¦
(C) Fine finish Dense structure
|À» (Lø£ß) ¤Ûæ[ Ahºzv¯õÚ Aø©¨¦
(D) External Grinding Dense structure
öÁÎ¦Ó Qø si[ Ahºzv¯õÚ Aø©¨¦
(E) Answer not known
Âøh öu¯ÂÀø»
167. The work table of the tool and cutter grinder can be swivelled to the
required angle for grinding.
lÀ ©ØÖ® Pmhº Qø shß ÷h¤øÍ _ÇØÖÁuß »® __________ Qø si[
ö\´¯»õ®.
(A) Flat surface (B) Cylindrical surface
¤Íõm \º÷£ì ]¼smPÀ \º÷£ì
(C) Milling cutters (D) Tapers
ªÀ¼[ Pmhºì ÷h¨£º
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 68
Text of page 67
168. Set the tooth rest of the tooth to be ground in tool and cutter
grinder.
lÀ ©ØÖ® Pmhº Qø shÀ lz ö ìm BÚx lzvß __________ À
Aø©UP¨£kQÓx.
(A) Over (B) Under
÷©»õP RÌ
(C) Parallel (D) Top
Cøn¯õP ÷©À
(E) Answer not known
Âøh öu¯ÂÀø»
169. The table rests and moves on a top on the in a Tool and cutter
grinder.
lÀ ©ØÖ® Pmhº Qø shÀ ÷h¤Ò __________ «x A©º¢x |PºQÓx.
(A) Base (B) Column
÷£ì ö|kÁø\
(C) Cross slide (D) Saddle
Q õì ]ø»k ÷\iÀ
(E) Answer not known
Âøh öu¯ÂÀø»
170. In tool and cutter grinder, the work table can be swivelled to the
required angle for
__________ ÷Áø» ö\´ÁuØPõP lÀ ©ØÖ® Pmhº Qø si[ ö©æÛÀ ÁºU
÷h¤øÍ |©US ÷uøÁ¯õÚ iQUS v¸¨¤ öPõÒÍ»õ®
(A) Grinding tapers (B) Milling purpose
Qø si[ ÷h¨£º ªÀ¼[ £o ö\´¯
(C) Surface Grinding purpose (D) Drilling purpose
\º÷£ì Qø si[ ö\´¯ iÀ¼[ ö\´¯
(E) Answer not known
Âøh öu¯ÂÀø»
69 539-Trade Machinist
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171. Before starting any grinding operation, we must do
G¢u J¸ Qø si[ C¯¢v zøu²® C¯USÁuØS ߦ |õ® __________
ö\¯ø» ö\´¯ ÷Ásk®.
(A) Turn on motor
÷©õmhõø C¯UP
(B) Oil the table
£o÷©ø\°À Gsön°h
(C) Check safety guards, wheel condition and PPE
PPE, Ã¼ß ußø© ©ØÖ® £õxPõ¨¦ PÁ\[PøÍ \£õºUP
(D) Clean the table
£o÷©ø\ø¯ _zu® ö\´¯
(E) Answer not known
Âøh öu¯ÂÀø»
172. In tool and cutter grinder, the flute in a cutting tool is important to grind
perfectly for
öÁmk® P¸ÂPøÍ lÀ ©ØÖ® Pmhº C¯¢v zvÀ Qø si[ ö\´²® ö£õÊx
Auß L¦ÑmkPøÍ xÀ¼¯©õP Qø si[ ö\´ÁuØPõÚ Põ n® ¯õx?
(A) used to holding purpose
AÁØÔÀ ¤izxöPõÒÍ ÷Ási¯uõÀ
(B) It controls tool colour
P¸ÂPÒ Ásn[PøÍ Pmk¨£kzu ÷Ási¯uõÀ
(C) During operation, it provides space for chip remove
÷Áø» ö\´²® ö£õÊx öÁmh¨£k® xPÒPÒ öÁÎ÷¯Ó HxÁõP
C¸¨£uõÀ
(D) Decorates the tool
öÁmkÎø¯ A»[P¨£uõÀ
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 70
Text of page 69
173. The following is a main feature of a tool and cutter grinders wheel head.
RÌPshøÁPÎÀ Gx lÀ ©ØÖ® Pmhº Qø shß ÃÀ öím £õPzvß UQ¯
÷Áø»¯õS®.
(A) It houses the worktable
£o÷©ø\ø¯ ¤izxUöPõÒÍ
(B) it providers a means of clamping the work piece
£o¨ö£õ¸øÍ ¤izxUöPõÒÍ Aø©¢xÒÍx
(C) It is fixed and cannot be adjusted
©õØÔ¯UP i¯õ©À J÷ {ø»°À C¸US®
(D) It can be swivelled to specific angles
÷uøÁ¯õÚ ÷PõnzvØS v¸¨¤ Aø©US® £i C¸US®
(E) Answer not known
Âøh öu¯ÂÀø»
174. is mounted on the bed-ways it reciprocates past the wheel on
cylindrical grinding machine.
]¼ßiUPÀ Qø si[ ªæÛÀ __________ BÚx ÷£êß ÷©Ø¦ÓzvÀ EÒÍ
ö£m÷Á ÷©À ö£õ¸zu¨£mkÒÍx. Cx Ãø» Ph¢x ö\ßÖ C¸US® ÷£õx
ßÝ® ¤ßÝ® |Pºzu¨£kQÓx.
(A) Base (B) Wheel head
Ai¨£õP® ÃÀ öím
(C) Table (D) Head stock
÷h¤Ò öím ìhõU
(E) Answer not known
Âøh öu¯ÂÀø»
71 539-Trade Machinist
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175. A considerable amount of metal removing by grinding without
is called dry grinding.
__________ £¯ß£kzuõ©À ö£¸©ÍÂÀ E÷»õP® APØÓ¨£k® øÓUS iø
Qø si[ GÚ¨ ö£¯º.
(A) Feed (B) Speed
L¥m ì¥m
(C) Depth of cut (D) Cutting fluid
öh¨z BL¨ Pm Pmi[ ¤Ðk
(E) Answer not known
Âøh öu¯ÂÀø»
176. When the surface of a grinding wheel develops a smooth and shining
appearance, it is said to be
J¸ Qø si[ Ã¼ß ÷©Ø£ ¨¦ ö©ßø©¯õÚ ©ØÖ® £Í£Í¨£õÚ ÷uõØÓzøu
E¸ÁõUS®÷£õx Ax __________ GÚ TÓ¨£kQÓx.
(A) Loaded (B) Glazed
÷»õhm QÍõìk
(C) Roughed (D) Unglazed
L¨k AßQÍõìk
(E) Answer not known
Âøh öu¯ÂÀø»
177. By cylindrical grinding the diameter of a workpiece can be maintained to
a close tolerance upto
]¼ßmPÀ Qø si[ ÷Áø»PÒ ö\´Áuß »® £o¨ö£õ¸mPÎß
Âmhzvß AÍøÁ SøÓ¢u hõ» ßì AÍÄUS __________ Áø £ õ©UP
i²®.
(A) 0.25 mm (B) 0.025 mm
(C) 0.0025 mm (D) 0.0002 mm
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 72
Text of page 71
178. is fitted on the saddle which has T slots for clamping
purpose in surface grinding machine.
\ºL÷£ì Qø si[ ö©æÛÀ ÷\i¼À ö£õ¸zu¨£mi¸US® __________ À
QÍõ®¨ ö\´ÁuØPõP T ÁiÁ Á¨£ÒÍ[PÒ ÷£õh¨£mi¸US®.
(A) Base (B) Column
÷£ì ö|kÁø\
(C) Wheel head (D) Table
ÃÀ öím ÷h¤Ò
(E) Answer not known
Âøh öu¯ÂÀø»
179. Star-dresser is used to dress the following grinding wheel
ìhõº&i ìéº BÚx RÌPsh ÁøP¯õÚ Qø si[ þUS ö£õxÁõP i ì
ö\´¯¨£¯ß£kQÓx.
(A) Fine - grain grinding wheel
ø£ß&Qø ß Qø si[ ÃÀ
(B) Coarse - grain grinding wheel
÷Põºì&Qø ß Qø si[ ÃÀ
(C) Medium - grain grinding wheel
«i¯® & Qø ß Qø si[ ÃÀ
(D) Very fine - grain grinding wheel
ªS¢u ø£ß & Qø ß Qø si[ ÃÀ
(E) Answer not known
Âøh öu¯ÂÀø»
73 539-Trade Machinist
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180. In truing a wheel with a diamond, the feed rate must not exceed
øh©sm lø» öPõsk Ãø» m¹°[ ö\´²®, Fmhzvß AÍÁõÚx
Psi¨£õP CuØS ÷©÷» C¸UP Thõx
(A) 0.01 mm (B) 0.1 mm
0.01 ª.« 0.1 ª.«
(C) 0.2 mm (D) 0.02 mm
0.2 ª.« 0.02 ª.«
(E) Answer not known
Âøh öu¯ÂÀø»
181. 0.025 microns value of Roughness is indicating the following roughness
number.
0.025 ø©U õß ©v¨ø£ SÔUS® u GsnõÚx __________ BS®.
(A) N4 (B) N1
(C) N2 (D) N3
(E) Answer not known
Âøh öu¯ÂÀø»
182. Which one of the following not the bonds in a grinding wheel
RÌUPshøÁPÎÀ G¢u JßÖ Qø si[ Ã¼ß £õsm AÀ»
(A) Vertified bond (B) Silicate bond
öÁmø£k £õsm ]¼÷Pm £õsm
(C) Shellac bond (D) Chemical bond
ö\À»õU £õsm öPªUPÀ £õsm
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 74
Text of page 73
183. The structure of grinding wheel depends upon
Qø si[ Ã¼ß Aø©¨¦ __________ I ö£õ¸zx Aø©QÓx.
(A) Hardness of the material being ground
Qø si[ ö\´¯¨£k® ö©mj¯ÀPÎß PiÚzußø©
(B) Nature of the grinding operation
Qø si[ C¯UP®
(C) Finish required
÷uøÁ¨£k® xÀ¼¯®
(D) All of these
AøÚzx®
(E) Answer not known
Âøh öu¯ÂÀø»
184. Which one of the following bond is most commonly used on grinding
wheels?
RÌPshøÁPÎÀ G¢u J¸ ¤øn¨¦ AvP©õP Qø si[ üÀ
£¯ß£kzu¨£kQÓx
(A) Vitrified (B) Rubber
Âmø£k ¨£º
(C) Shellac (D) Silicate
öåÀ»õU ]¼÷Pm
(E) Answer not known
Âøh öu¯ÂÀø»
75 539-Trade Machinist
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185. What type of natural abrasives are crushed to produce abrasive grains
for making the grinding wheels and lapping compound?
Qø si[ ÃÀ ©ØÖ® ÷»¨¤[ Põ®£Äsm u¯õUP ÷uøÁ¯õÚ A¨ êÆ
Qø s GßÚ ÁøP¯õÚ C¯ØøP A¨ êÆøÁ ö|õÖUQ u¯õUP¨£kQÓx?
(A) Emery (B) Diamond
G© øÁ ®
(C) Sand stone (D) Corundum
©nÀ PÀ öPõ sh®
(E) Answer not known
Âøh öu¯ÂÀø»
186. What type of abrasives is used for grinding of very hard materials with
low tensile strength?
SøÓÁõÚ Á¼ø© ©ØÖ® AvP PiÚzußø© EÒÍ ö©mj¯ÀPøÍ Qø si[
ö\´ÁuØS GßÚ ÁøP¯õÚ A¨ êÆ £¯ß£kQÓx?
(A) Corundum
öPõ sh®
(B) Aluminium Oxide
A¾ªÛ¯® BUøék
(C) Green Silicon oxide
£aø\ ]¼Põß BUøék
(D) Brown Aluminium oxide
£Ê¨¦ A¾ªÛ¯® BUøék
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 76
Text of page 75
187. Which natural abrasive used to make grind stones?
Qø si[ PÀ EØ£zv ö\´ÁuØS G¢u C¯ØøP A¨ êÆ £¯ß£kQÓx?
(A) Diamond (B) Sand stone
øÁ ® ©nÀ PÀ
(C) Corundum (D) Aluminium oxide
÷Põ sh® A¾ªÛ¯® BUøék
(E) Answer not known
Âøh öu¯ÂÀø»
188. abrasive is used in grinding wheel for grinding hand metals.
PiÚ©õÚ E÷»õP[PøÍ \õøn ¤i¨£uØS £¯ß£kzu¨£k® Qø si[ üÀ
__________ A¨ êÆ xPÒPÒ £¯ß£kzu¨£kQÓx.
(A) Cubic bora nitride (B) Silicon carbide
Q³¤U ÷£õ õ ø|mø m ]¼UPõß Põºø£k
(C) Aluminium oxide (D) Garnet
A¾ªÛ¯® BUøék Põºö|m
(E) Answer not known
Âøh öu¯ÂÀø»
189. The Number 60 in the code A 60 K 7 V represents in grinding wheel
is
J¸ Qø si[ üÀ A 60 K 7 V GßÖ ö£õÔUP¨£mi¸¨¤ß, CvÀ 60
GßÓ Gs __________ SÔUQßÓx.
(A) Grade (B) Grit size
Q÷ k Qmiß AÍøÁ
(C) Bond type (D) Structure
£õsiß ÁøPø¯ Pmhø©¨ø£
(E) Answer not known
Âøh öu¯ÂÀø»
77 539-Trade Machinist
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190. A Grinding wheel is specified by A 56 K 5 V 75 the meaning of A 56
Qø si[ ÃÀ SÔ±k ö\´²® øÓ°À A 56 K 5 V 75 56 Gߣx
__________ SÔUQÓx.
(A) Grit size (B) Grade
Qm ø\ì Q÷ m
(C) Bond (D) Structure
£õsm Pmhø©¨¦
(E) Answer not known
Âøh öu¯ÂÀø»
191. What is unit of cutting speed in VMC?
V.M.C &°À öÁmk® ÷ÁPzvß A»S GßÚ?
(A) Meter/sec (B) Meter/min
«mhº / ö|õi «mhº / {ªh®
(C) mm/min (D) Revolution/min
ª«/ {ªh® _ØÖ / {ªh®
(E) Answer not known
Âøh öu¯ÂÀø»
192. Which mode is used to copy the part program in VMC?
ÂG®]&CÀ £õºm ¨÷ õU õ® |Pö»kUP G¢u ÷©õk £¯ß£kzu¨£kQÓx?
(A) MDI (B) JOG
G®jI áõU
(C) AUTO (D) Edit
Bm÷hõ Gim
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 78
Text of page 77
193. Relative effect of each cutting parameter.
l¼ß B²mPõ»zøu £õvUPUTi¯ Pmi[ £õ õ«mhº
(A) For good grip
|À» ¤i¨¦UPõP
(B) To reduce the tightness
CÖUPzøuU SøÓUP
(C) To improve look
£õºøÁ AvPUP
(D) The cutting speed has an inverse relation with the tool life
öÁmk ÷ÁP©õÚx l¼ß B²mPõ»zxhß uø»RÌ öuõhº¦ öPõskÒÍx
(E) Answer not known
Âøh öu¯ÂÀø»
194. The life of the tool can be expressed in way
P¸Â°ß (tool life) B²øÍ __________ ÁÈPÎÀ öÁΨ£kzu»õ®.
(A) For good grip
|À» ¤i¨¦UPõP
(B) Actual cutting time to failure
\¯õÚ AÍÄ öÁmk® ÷| zxhß ÷uõÀÂ BS® Áø
(C) To reduce the tightness
CÖUPzøuU SøÓUP
(D) To improve look
£õºøÁ AvPUP
(E) Answer not known
Âøh öu¯ÂÀø»
79 539-Trade Machinist
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195. To purpose of G19 code during CNC VMC programming
CNC VMC ¦÷ õQ õª[Qß ÷£õx G19 BÚx __________ ØPõP
£¯ß£kzu¨£kQÓx.
(A) XY plane designation (B) ZX plane designation
XY £ ¨¤À Aø©UP ZX £ ¨¤À Aø©UP
(C) YZ plane designation (D) XZ plane designation
YZ £ ¨¤À Aø©UP XZ £ ¨¤À Aø©UP
(E) Answer not known
Âøh öu¯ÂÀø»
196. In CNC programming, code is used to call a sub - program.
CNC ¦÷ õQ õª[Qßö£õÊx, sub - program call GßÓ £¯ß£õmiØS
__________ code&ø¯ £¯ß£kzu÷Ásk®.
(A) G98 (B) M99
(C) G99 (D) M98
(E) Answer not known
Âøh öu¯ÂÀø»
197. In CNC VMC programming code is a Dwell command, the tool
pause or hold its position in specific time.
CNC C¯¢v zvÀ J¸ SÔ¨¤mh ÷| zvØS ö©æÛ[ ö\´¯õ©À öÁmkÎø¯
{ø» {Özx® Dwell P©õsm Gߣx __________ BS®.
(A) G14 (B) G44
(C) G24 (D) G04
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 80
Text of page 79
198. M06 is applied in VMC program for
VMC ¦÷ õQ õªÀ M06 __________ ØPõP £¯ß£kzu¨£kQÓx.
(A) Tool change (B) Coolant off
öÁmkÎø¯ ©õØÓ Sιmiø¯ {Özu
(C) Stop spindle (D) Excute subprogram
ì¤ßiø» {Özu subprogramø¯ |øhøÓ£kzu
(E) Answer not known
Âøh öu¯ÂÀø»
199. Manual mode allow the operator to do on a VMC for
VMC C¯¢v zøu C¯US£Áº __________ ØPõP Manual mode £¯ß£kzxQÓõº.
(A) Move axes, set offset manually and change tools
axes&ø¯ |Pºzu, offset&ø¯ ÷©ÝÁ»õP C¯UP ©ØÖ® öÁmk{ø» ©õØÓ
(B) Save electricity
ªß\õ ]UPÚzvØPõP
(C) Print report
AÔUøPPøÍ Aa]h
(D) Edit new code
¦v¯ code&PøÍ uoUøP ö\´¯
(E) Answer not known
Âøh öu¯ÂÀø»
81 539-Trade Machinist
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200. This is the main reason for ensuring all safety covers and interlocks are
active before starting VMC.
VMC C¯¢v zøu C¯USÁuØS ߦ C¯¢v zvß AøÚzx £õxPõ¨¦
PuÄPøͲ® Em¦Ó §mkPøͲ® §mi¯ ¤ß÷£ EÖv ö\´Áuß ÷|õUP®
(A) To prevent injury from moving parts
|P¸® £õP[PÎÚõÀ HØ£k® Põ¯[PøÍ uºUP
(B) To improve coolant flow
Sιmi°ß £õ²® ußø©ø¯ AvPUP
(C) To reduce cutting speed
öÁmk® ÷ÁPzøu SøÓUP
(D) To reduce tool vibration
öÁmk롧 AvºøÁ SøÓUP
(E) Answer not known
Âøh öu¯ÂÀø»
539-Trade Machinist 82Official key not published for this paper.
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Source: Tamil Nadu Public Service Commission. Question paper published by Tamil Nadu Public Service Commission.