APSC JE 2024: Junior Engineer, Public Health Engineering Department (Advt. 29/2023), Mechanical Engineering
Text of page 1
JEIPHE lMDltU24
DO NOT OPEN THIS TEST BOOKLET UNTIL YOU ARE ASKED TO DO SO
Test Booklet No. Series
0f;aCI1"
TEST BOOKLET
.\
Paper-II
( MUcHANTcAL EucrnpERrNG )
TlmeAllowed,z2Hours Full Marks : 1OO
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147 [ No. of Questions : 1OO
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1. For placing of dimensions in 5" A passenger train takes two hours
engineering drawing, there are less for a journey of 300 km if
number(s) of system(s). its speed is increased by 5 km/hr
over its usual speed. Then what
(A). three is the usual speed?
(B) two
(A) 15 km/hr
(C) four
(D) one (B) 29 km/hr
2. There are Wpes of scales used
(c) 25 km/hr '
in practice of engineering drawing.
- (D) 30 km/hr
(A) four
(B) three
(C) two 6. The motion of a bicycle wheel is
(D) five (A) linear
3. The gravitational field intensity is (B) rotatory
maximum
(A) at the equator (C) translatory
(B) at the pole
1D) rotatory as well as translatory
(C) at the centre of the earth
(D) at a height above the surface
7. Newton's first law of motion gives
the concept of
4. The resultant of force acting on
a body will be zero, if the body
(A) work
(A) rotates
(B) does not rotate (B) force
(C) moves along a curved path (C) inertia
(D) rotates with uniform
acceleration (D) ener5/
JE/PHE/MEltr/24147-A
Text of page 3
8. The moment of inertia of a body does 12. The CG of a triangle lies at the point
not depend upon of intersection of
(A) mass of the body
(A) diagonals
(B) the angular velocity of a body
(C) the axis of rotation of the body (B) altitudes
(D) None of the above (C) bisectors of angles
9. A non-reversible machine has (D) medians
efficiency
(A) nearly IOOVI
(B) between 75o/o and 99%o 13' In simple harmonic motion, the
acceleration is proportional to
(C) more than 5oolo
(D) less than 507o (A) {isPlacement
(B) linear velocity
10. The moment of inertia of an area
is always least with respect to
, (C) angular velocity
(A) centroidal axis
(B) vertical axis (D) enerry
(C) radius of ryration
(D) Depends upon configuration of 14. A body moving around a fixed axis
the area constitutes
11. The unit of the moment of inertia (A) curvilinear motion
of an area is
(A) ks-m (B) circular motion
(B) ks-rn2 (C) plane motion
(c) kg-tt a
(D) simultaneous translation and
(D) m4 rotation
JElPHE/MEltrl24l47-A lP.T.O.
Text of page 4
15. Stiffness of a material is expressed 19. The shear force at certain section of
in terms of beam is stated to be zero. The
bending moment at that section
(A) mass density will be
(B) hardness number
(A) minimum
(C) impact strength
(B) maximum
(D) modulus of elasticity
(C) zero
16. Toughness of a material signifres
(D) either minimum or mildmum
(A) strength
(B) softness
2C,. A structural member subjected to
(c) brit*eness
an a:rial compressive force is called
(D) lower yield point
{^t beam
17. The statement, Stress is proportional
to strain, i.e., Hooke's law hold (B) column
goods up to
(C) frame
(A) elastic limit
(B) limit df proportionality (D) strut
(C) upper yield point
(D) lower yield point 21. The shape of the bending moment
diagram for a cantilever beam
carrying a uniformly distributed
18. The tendency of a material load is
to fracture without appreciable
deformation is called (A) a straight line
(A) toughness
(B) a hyperbola
(B) stiffness
(C) an ellipse
(C) plasticity
(D) brittleness (D) a parabola
JE/PHE/ME/rr/24147-a 4
Text of page 5
22. Slenderness ratio of a column is 26. Tjae moment of inertia of an area
delined as the ratio of its length will be least with respect to
to its
(A) least radius of ryration (A) central axis
(B) least lateral dimension (ts) horizontal axis
(C) maximum lateral dimension
(c) vertical axis
(D) maximum radius of ryration
(D) moment of area same through
23. Young's modulus of elasticity for all axes
a perfectly rigid body is
(A) zero
27. lf a column fails due to buckling,
(B) unity it is likelY to be a
I
(c) infinity
I
1a) long column
(D) some infinite non-zero
constant (B) short column
24. Hoop stress is (c) strut
(A) radial stress (D) reinforced column
(B) compressive stress
(c) longitudinal stress 2g. Modulus of rigidity is the ratio of
(D) circumferential tensile stress
(A) axial stress to lateral strain
25. The stress at neutral axis is
(B) linear stress to longitudinal
(A) zero strain
(B) maximum tensile (C) shear stress to shear strain
(C) minimum compressive
(D) hydrostatic stress to
(D) minimum tensile volumetric strain
JE/PHE/MDlrrl24l47-A 5 lP.T.O.
Text of page 6
29. An ideal fluid 32. The equation of continuity of flow
is based on the principle of
(A) has no viscosity conservation of
(A) momentum
(B) satislies the relatiofl PV= RT
(B) enerry
(C) obeys the Newton's law of (C) mass
viscosity
(D) None of the above
(D) is both incompressible and
non-viscous 33. A Pitot tube is used for ttre
measurement of
(A) viscosity i
3O. The general ener$/ equation is
applicable to (B) pressure
(C) surface tension
(A) steady flow
(D) velocity
(B) unsteady flow
34. Capillary action is due to the
(C) turbulent flow
(A) viscosity of liquid
(D) laminar flow (B) cohesion of liquid particles
(C) tension
"rri"""
31. Bernoulli's theorem deals with the (D) None of the above
. principle of conservation of
35. In a centrifugal pump casing, the
(A) force flow of water conforms to
(A) radial flow
(B) enerry
(B) free vortex flow
(C) mass
(C) spiral flow
(D) momentum (D) forced vortex motion
JE/PHE/ME/tt/241+7-A 6
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36. The pressure drop in a pipe flow is 4O. In the boundary layer, the flow is
directly proportional to the mean
velocity. It is suggested that the (A) viscous and rotational
(A) flow is laminar (B) inviscid and irrotational
(B) flow is turbulent (C) inviscid and rotational
(C) pipe is smooth
(D) viscous and irrotational
(D) pipe is rough
41. At the point of boundary layer
37. The centre of gravity of the volume separation
of liquid displaced by an immersed
body is called (A) shear stress is maximum
(A) wet CG (B) shear stress is zero
(B) centre of buoyancy (C) velocity is negative
(C) metacentre
(D) density variation is maximum
(D) wet centre
42. Surface tension is due to
38. Atmospheric pressure held in terms
of water column is' (A) cohesion only
(A) 7.5 m (B) adhesion only
(B) 8'5 m
(C) cohesion and adhesion only
(c) 9.BL m
(D) neither cohesion nor adhesion
(D) 10.30 m
43. The continuity equation represents
39. One-dimensional flow means conservation of
(A) uniform flow
(A) mass
(B) steady flow
(B) momentum
(C) straight line flow
(C) enerry
(D) flow which neglects changes in
transverse direction (D) vortices
JE/PHE/MEltr/24147-A lP.T.O.
Text of page 8
44. ln automobiles, Hooke's point is 47. A pair is termed as higher pair
' used between which of the when relative motion between two
following? elements of the pair is
(A) turning only
(A) Clutch and gearbox
(B) sliding only
(B) Gearbox and differential (C) rolling only
(D) partly sliding and partly
(c) Differential and wheel turning
(D) Flywheel and clutch 48. The gears employed for connecting
two non-intersecting and non-
. parallel, i.e., non-coplanar shafts
' are
45. A ball and socket joint constitutes
a spherical pair having (A) bevel gears
degree(s) of freedom.
(B) spiral g.iars
(A) no (C) helical gears
(D) miter gears
(B) ooe
49. A kinematic chain becomes a
(C) two mechanism when
(D) three (A) first link is fixed
(B) all links are fixed
(C) any one of the links is fixed
46. Cam and follower mechanism
constitutes a kinematic pair of the
(D) None of the links is fixed
Wpes
5O. In a kinematic chain, the minimum
(A) lower and open number of kinematic pairs
required is
(B) higher and open (A) one
(B) two
(C) lower and closed
(C) three
(D) higher and closed t
(D) four
JE/PHE/}MEfii/241+"-^
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51. The function of a governor is to The section view drawing in which
one-fourth of an object has been
(A) smoothen the cyclic marked for removal is known as
fluctuations of speed a section.
(B) help to start the engine (A)
- full
(B) half
(C) take care of output
fluctuations and control the (C) quarter
input accordingly (D) None of tJ:e above
(D) store up enerry and give up
the same whenever required 55. Which is an angled surface used
during a cycle on cylinders to make them easier
to handle?
(A) Fillet
52. A flywheel influences the
(B) Taper
(A) mean speed of the engine (C) Lus
(B) mean torque developed by the (D) Chamfer
engine
56. The type of line that projects
(C) variation of load demand on from €ux object for the express
the engine purpose of locating a dimension is
a/an line.
(D) cyclic fluctuations of speed
when delivering constant (A) visible
-
output (B) hidden
(C) extension
53. When a cone is cut by planes (D) dimension
at different angles, the curves of
intersection are called
s7. Welding drawing.is a special type of
(A) cycloid which kind of drawing?
(A) Symbol
(B) involute
(B) Assembly
(C) trochoid (C) Perspective
(D) conic (D) Isometric
JE/PHE/MElrrl24l47-a 9 lP.T.o.
Text of page 10
58. Drafters should use a in 61. In isometric projections; all
a section view of a mechanical distances are approximately which
part that includes the cylindrical percentage of their true size?
view of a threaded hole.
(A) 120 percent
(A) centre line (B) g0 percent
(B) hatch line (c) 5o Percent
(D) 2O percent
(C) polyline
62' what t:rtl",rH;,""".:n:l*J;l,r*"
(D) dimension line
(A) Isosceles triangle
59. objects that are symmetric can be (B) Acute triangle
shown effectively using which type
of section? (C) Equilateral triangle
. (D) Scalene triangle
(A) Quarter section
(B) Half section 63. What is the quadrilateral if all the
four sides are equal but only the
opposite angles are equal?
(C) Full section
(A) Rectangle
(D) Symmetric section
(B) Rhombus
(C) Trapezoid
6O. The gears transmit power between
(D) Square
shafts whose.axes intersect at any
angle are
64. The first law of thermodynamics
(A) worm gears refers to conservation of
(A) enerry
(B) spur gears
(B) mass
(C) bevel gears
(C) force
(D) racks (D) momentum
JE/PHE/ME/rr/24147-A
Text of page 11
65. Heat supplied to a system equals 68. Expansion of hot gases in an IC
the work done in case of a non-flow engine can be approximated to an
process carried out
(A) isothermal process
(A) isochorically
(B) adiabatic process
(B) isobarically
a
(C) isobaric process
(C) isothermally
(D) isochoric process
(D) adiabatically
69. Which"one of the following thermo-
66. Change in enthalpy in a closed dynamic processes approximate the
system is equal to heat transferred, of food in a pressure
"teaming
cooker?
if the reversible process takes place
at constant
(A) Isenthalpic
(A) temperature
(B) Isobaric
(B) internal enerry
, (C) Isochoric
(C) pressure
(D) Isothermal
(D), entropy
70. For steady flow through an insulated
horizontal constant diameter pipe,
67. A gas turbine works on which property remains constant?
(A) Rankine cycle (A) Enthalpy
(B) Carnot cycle (B) Internal enerry
(C) Otto cycle (C) Entropy
(D) Brayton cycle (D) Vo1ume
JE/PHE/MElfil24l47-a 11 lP.T.O.
Text of page 12
71. A heat engine is supplied with 74. The ability of gasoline to resist
2512 kJ /min of heat at 650 "C. detonation during combustion is
Heat rejection with 900 kJ/min given by
takes place at 100 "C. This type of
heat engine is (A) octane number
(A) ideal (B) cetane number
(B) irreversible (C) iso-octane number
(C) impossible (D) heptane number
(D) practical
75. The value of extensive property is
essentially dependent on
72. Isothermal and adiabatic processes
are identical (A) mass or extent of the system
(A) at saturation temperature (B) interaction of system with its
surroundings
(B) at critical temperature
(C) nature of boundaries, rigid or
flexible
(C) below 0 "C temperature
(D) path followed by the system
(D) at absolute zero temperature going from one state to another
.
;
73. A process which does not dissipate 26. The artificial draught normally
available enerry is known as designed to produce
(A) adiabatic process (A) less smoke
(B) isothermal process (B) more draught
(C) ideal process (C) less chimney gas temperature
(D) frictionless process (D) All of the above
JE/PrJE/ME/rr/24/47-a t2
Text of page 13
77. lnjet type condensers 81. Which of the following safety devices
(A) cooling water passes through
is used to protect the boiler
when the water level falls below
tubes and steam surrounds a minimum level?
them
(A) Water level indicator
(B) steam passes through tubes
and cooling water surrounds (B) Fusible plug
them
(C) Blow-off cock
(C) steam and cooling water mix
(D) Safety valve
(D) steam and cooling water do
not mix
42. _ is a water-tube boiler.
78. Compounding of steam turbine is (A) Benson
done for
(B) Stirling
(A) reducing the work done
(C) Cochran
(B) increasing the rotor speed
(D) LaMont
(C) reducing the rotor speed
(D) balancing the turbine 83. The major shortcoming of fire-tube
boiler is
79. India's first nuclear power plant was (A) high cost
installed at
(B) requirement of high draught
(A) Tarapur
(C) need of highly skilled labour
(B) Kota
(D) size and pressure limitation
(C) Kalpakkam
inherent in design
(D) None of the above
84. The angle between face and flank
8O. The average ash content in Indian of the single point cutting tool is
coal is about known as
(A) 5o/o (A) rake angle
' (B) 70% (B) clearance angle
(c) t,%o (C) lip angle
(D) 2Oo/o (D) point angle
JE/PHE/MElfil24l47-A 13 lP.T.O.
Text of page 14
85. The purpose of providing side rake 89. Grinding is a _ operation.
angle on the cutting tool is to
(A) facing
(A) control chip flow
(B) forming
(B) strengthen tool edge
(C) dressing
(C) break chip
(D) surface finishing
(D) avoid work from rubbing
against tool
9O. In which operation tool does not
rotate?
86. In a machining process, the
percentage of heat carried away (A) Planning
by the chip is typically
(B) Grinding
(A) 5o/o
(C) Drilling
(B) 25o/o
(D) Milling
(c) so%
(D) 75o/o 91. Which of the following is a type
of fusion welding?
87. Which of the following methods {A) Ultrasonic welding
should be used for turning internal
tapers only? (B) Friction welding
(A) Tailstock offset (C) Carbon arc welding
(B) Taper attachment (D) Forge welding
(C) Form tool
92. Which of the following is a solid-state
(D) Compound rest welding?
(A) Projection, ultrasonic and
88. Removal of metal by feeding the
electron beam welding
work part a rotating multipoint
cutter is known as (B) Friction stir, projection and
laser beam welding
(A) grinding
(B) broaching (C) Projection, ultrasonic and
diffusion welding
(C) milling
(D) explosive, diffusion and
(D) burnishing electron beam welding
I
JElPHE/ME/trl24l47-a t4 I
Text of page 15
93. In AutoCAD, the 3-D commands on 97. The locus of instantaneous centre of
the modelling toolbar include a moving rigid body is
(A) sphere (A) involute
(B) extrude (B) cyctoid
(C) box (C) epicyctoid
. (D) All of the above
(D) centroid
94. The rotational analogue of force in
linear motion is 98. Which of the following is a fire-tube
boiler?
(A) couple
(A) Babcock and Wilcox
(B) torque
i (B) Stirling
(C) moment of momentum
(C) Cochran
(D) moment of inertia
(D) None of the above
95. The slope on the road generally
provided on the curves is known as 99. The unit of force in SI system is
(A) angle of repose (A) newton
(B) angle of friction
(B) dyne
(C) angle of banking
(c) kgf
(D) angle of reaction
(D) newton-metre
96. The radius of grration of a circular
area of radius r with respect to 1OO. Which of the following is not a vector
centroidal axis is quantity?
(A) 0.1r (A) Force
(B) O.2r (B) Displacement
(c) o.5r (C) Distance
(D) o.7r (D) Weight
JE/PHE/MElrr/24147-a 15 lP.T.O.
Text of page 16
SPACE FOR ROUGH WORIT
-
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D
***
JElPHE/ME/il124147-a 16 24T-575x4
Text of page 1
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-::f*.7 ASsAirI PIIBLIC SER\rIGE Goll.t l,lISSIa)nl
Provisional Answer Key of OMR based Screening Test for
recruitment to the post of Junior Engineer (Civil, Mechanical, Electrical, Chemical) Public
Health Engineering Department
held on 14.07.2024
(Advt. No.29l2023 dated 31.10.2023)
Subiect: Paper - II (MECHANICAL ENGINEERING)
Series : A
Marks: 100 Time: 2:00 hours
Q,NO. ANS_KEY Q.NO. ANS_KEY Q. NO. ANS KEY Q. NO. ANS KEY
1 B 26 D 51 C 76 D
2 D 27 A 52 D 77 C
3 C 28 C 53 C 78 C
4 B 29 D 54 B 19 A
5 C 30 A 55 D 80 D
6 D 31 B 56 C 81 B
7 C 32 C 57 B 82 B
8 B 33 A 58 A 83 D
9 D 34 C 59 B 8r+ B
i0 A 35 B 60 C 85 A
11 D 36 B 61 B 86 D
12 D B 62 D 87 A
13 A 38 D 63 B 88 C
14 R 39 D 64 A 89 B
15 B 40 A 65 C 90 A
16 A 41 B 66 C 91 C
17 B 42 A 6'7 D 92 C
18 D 43 A 68 B 93 D
19 C 44 B 69 C 94 B
20 B 45 D 70 A 95 C
2l D 46 B 71 C 96 C
22 A 47 C 72 D 97 D
23 C 48 B IJ C 98 C
24 D 49 C 74 A 99 A
25 A 50 D 75 A 100 C
Text of page 2
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A5!IA]'I PT.IBLIC SERVICE
Provisional Answer Key of OMR based Screening Test for
recruitment to the post of Junior Engineer (Civil, Mechanical, Electrical, Chemical) Public
Health Engineering Department
held ot 14.07 .2024
(Advt. No.29l2023 dated 31.10,2023)
Subiect: Paper - II (MECHANICAL ENGINEERING)
Series: B
Marks: f00 Time: 2:00 hours
Q.NO. ANS KEY Q.NO. ANS KEY Q. NO. ANS KEY Q. NO. ANS-KEY
1 R 26 t") 5l B 76 C
2 B 2l C 52 C 77 B
3 D 28 B 53 A 78 A
4 ts 29 D 54 C 79 B
5 A 30 A 55 B 80 C
6 D 31 D 56 B 81 B
7 A 32 D 57 B 82 D
8 C -r -J A 58 D 83 B
9 B 34 B 59 D 84 A
10 A 35 B 60 A 85 C
11 C 36 A 61 B 86 C
12 C 37 B 62 A 87 D
13 D 38 D 63 A 88 B
t4 B 39 C 64 B 89 C
15 C 40 B 65 D 90 A
16 C 4l D 66 B 91 C
17 D 42 A 67 C 92 D
18 C 43 C 68 B 93 C
l9 A 44 D 69 C 94 A
20 C 45 A 70 D 95 A
2T B 46 D 71 C 96 D
22 D 47 A 72 D 97 C
r), 23
24
C
B
48
49
C
D
l3
74
C
B
98
99
C
A
25 C 50 A 75 D 100 D
Text of page 3
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ASs'\M PI'BLIC SER\,ICE COI'{ ]{ISiSION
Provisional Answer Key of OMR based Screening Test for
recruitment to the post of Junior Engineer (civil, Mechanical, Electrical, chemical) Public
Health Engineering Department
held on 14.07.2024
(Advt. No.29l2023 dated 3 1.10.2023)
Subiect: Paper - II (MECHANICAL ENGINEERING)
Series: C
Marks: 100 Time: 2:00 hours
Q.NO. ANS KEY Q.NO. ANS-KEY Q.NO. ANS KEY Q.NO. ANS-KEY
1 C 26 D 51 B 76 D
2 D 21 C 52 D 7l A
3 C 28 C 53 C 78 C
4 B 29 A 54 B 79 D
5 D 30 t) 55 C 80 A
6 C 3l B 56 D 81 B
7 B 32 B 57 C 82 C
8 A JJ D 58 B 83 A
9 B 34 B 59 D 84 C
10 C 35 A 60 A 85 B
l1 B 36 D 61 D 86 B
12 D A 62 D 87 ts
l3 B 38 C 63 A 88 D
14 A 39 B 64 B 89 D
15 C 40 A 65 B 90 A
16 C 41 C 66 A 91 B
17 D 42 C 61 B 92 A
18 B 43 D 68 I) 9l A
19 C 44 B 69 C 94 B
20 A 45 C 70 B 95 D
21. C 46 C 71 D 96 B
22 D 47 D 72 A 97 C
23 C 48 C 13 C 98 B
24 A 49 A 74 D 99 C
25 A 50 C 75 A 100 D
Text of page 4
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ASSAM PI,ELIG SER.\'ICE ICOIYI IVIISSION
Provisional Answer Key of OMR based Screening Test for
recruitment to the post of Junior Engineer (Civil, Mechanical, Electrical, Chemicat) Public
Health Engineering Department
held on 14.07.2024
(Advt. No.29l2023 dated 31.10.2023)
Subiect: Paper - II (MECHANICAL ENGINEERING)
Series: D
Marks: 100 Time: 2:00 hours
Q.NO. ANS_KEY Q.NO. ANS KEY Q.NO. ANS_KEY Q. NO. ANS KEY
I C 26 B 51 B 76 C
2 A 2l A 52 D 11 B
) C 28 B 53 ts 78 D
4 B 29 C 54 A 79 A
5 B 30 B 55 D 80 D
6 B 31 D 56 A 81 D
7 D B C 82 A
8 D 33 A 58 B 83 B
o A 34 C 59 A 84 B
10 B 35 C 60 C 85 A
1l A 36 D 6t C 86 B
12 A 37 B 62 D 87 D
13 B 38 C 6J B 88 C
14 D 39 A 64 C 89 B
15 ts 40 C 65 C 90 D
16 C 41 D 66 D 91 A
tl B 42 C 61 C 92 C
18 C 43 A 68 A 93 D
19 D 44 A 69 C 94 A
20 C 45 D 70 ts 95 D
21 D 46 C 71 D 96 A
22 C 47 C 72 C 97 C
prM 23 B 48 A 13 B 98 D
24 D 49 D 74 C 99 A
IJ C 50 B 15 D 100 BPage 1 of 16
Source: Assam Public Service Commission. Question paper published by Assam Public Service Commission.