Machine-translated by Google. Questions are authored in English.
Top

APSC JE 2024: Junior Engineer, PWRD and PW (Building and NH) Department (Advt. 10/2024), Mechanical Engineering

  • Date: 22 December 2024
  • Paper code: Advt. 10/2024
  • Language: English
  • 16 pages
APSC JE 2024 question paper, Junior Engineer, PWRD and PW (Building and NH) Department (Advt. 10/2024), Mechanical Engineering, page 1 of 16
Page 1 of 16
Text of page 1
JE/PWD/MElU24

                                                                                                            Series
Test Booklet No. :

                02525
                                         TEST BOOKLET
                                            Paper-I
                               ( MecnelvtcAl ENGINEERTNG I
TimeAllowed:2llour8                                                                                   Fuu Marks : 10o
Rcdt th. lolloutang tn tructto , ccLr!,|.lu bator. lou bqf^ b antu'r l"B qu.tflont 'l
 l. The name of tlre Subject, Ro[ Number as Bentiotted in the AdrBission Certificate, Test Booklet          No. and Series
    ale to be \Eitten legib'ly end correctly in the space  provided on thc  Arswer-Sheet with  Black/  BIue  balpoitrt Pen.
 2. A!.rcr€hGct sltbout        !!asll!S  SGrlGr  ar Ectttloacd   rbovc  h  t'hc .P.cc Provldcd  for h  thG  An  wcr-shc.t
    rhdl lot b3 clralultGd.
 3. All questioDs caffy equal Dla.rks.
    Thc Altrcr-shcGt ahould bc .ubElttrd to tho ltrvlgl.tor'
        Dirediotls for giuitt4 t re anslrers : Directions fof answering questions have already been issued to the respective
        candidate; in-the instructioos for marking in thc OMR Answcr-Shcet'along with tlre Admit Catd and Specimen
        Copy of the OMR Anstrner-Shcet.
        E cdnple i
        Suppos€ the foll,owing qu€stion is asked :
           The capit l of Bangladesh is
              (A) Chemai
              (B) Irndon
              (C) Dhaka
              (D) Dhubri
        you rpitt trare four alternativca in the Answcr-sheet for your reaponse corresponding to each question of the
                                                                                                                               @
        Test Booklet as below :
                                                                                                                               m
                                                     @@@@                                                                      t-
        ln the above illustratiot!, ifyour chos.n response is atternative (C) , i.c. , Dhaka, then thc same should be marked
        on the Answ€r-Sheet by blackcning the retcvant circle with,a Black/Blu. balpoint pen only as below :
                                                     @@o@
     Thc c'rtrpb .hoe! rbov. lr tic ottly cottcct E tbod of.Dttcttlt3'
  4, Use of eraser, btrade, cheEical whitetter lluid to rectify any respons. is prohibited.
  s. plesse ensure that the Tcst Booklet has the rcquired nuaber of pagcs (16) arrd lOO qucstiotrs im$ediately after
     opening tie Booklet. In casc of any discrcpancy, please report t}le saDe to the Ineigilator'
  6. No candidatc ahall bc adoitted to thc Exaaination Hall/Room 20 minutes efter thc cotEmcncement of the
        examination.
  7, No candidate shatl leave the EIgrI4l&g!9IlE99!g without prior perEission of the Supcririsor/Invigilator' No
     @swer-Shcet                                                       ard leavc the Exanination Hall/Room before
     o.Piry of the tull time allott€d for each papcr.
     Xo UoUile phonc, El€ctronic CoEDunicatioo Device, etc., arc allowed to be ca.rried inside tl.e DxaDitration
     Halt/Room by thc candidates. Any Mobilc Phone, Elcctroaic CoEEunication Devicc, ctc., found in poasession
     of thc caDdid;te inside the Exaroinatiq! HaI/Room, evetr if on off 6odc, ehall be liabie for colfiscation.
  9. No candidate sha.ll have in his/her po3scssion inside the E emination Ha[/Roorn atly book, noteboot or loos€
     pap€r, except his/her AdEfssioa Certificate and other contrected paPers peraitted by the Coooi*3ion'
 10. bomplete sience oust be obscrved in the Exalrdnation Hal/RooD. No candidate shall copy from the Palrr of
     any other candidatc, or pqrmit hk/hcr o$Et pap€r to bc copicd, or givc, or attcropt to give, or obtain, or attempt
     to obtain irregular assist ncc of arry kind.
 11, This Tcst Booklet can be carricd rritb you a.ftcr answering the questions in the prescribed Answer-Shcet.
 12, Noncoopliancc with any of the abovc inatructions *rill reader a candidate liable to P€[alty as tDay be deeEed
         6L
  13.    No rough work is to be donc on the OMR Alawcr-Shect. You can do the rough work on t}te space provided in the
         Test Booklet.
 !I.B. : rh.rc g.lll bG ttcg.tfirc tn.d.ttrg @ o.25 t 3t 1 (onel t!.rk rg.In.t G.ch wT otrg .nlsel.
 @8,                                                                     [ !to' of Que:tloar: 1oo I
APSC JE 2024 question paper, Junior Engineer, PWRD and PW (Building and NH) Department (Advt. 10/2024), Mechanical Engineering, page 2 of 16
Page 2 of 16
Text of page 2
l. According to equilibrium law, two         S, A body of weight I,l/ is required to
      forces can be in equilibrium if they          move up the rough inclinid prane
      are                                           whose angle of inclination with the
      (A) equal in magnitude                        nonlltat is cr. The effort applied
                                                    parallel to the plane is given by
      (B) collinear in action
      (C) opposite in direction                     (A) P=l7tana
      (D) All of the above                          (B) P = Wtan (o + 9)
                                                    (C) p=W(sino+pcosc)
  '' ffi,ir'H::'.ffi""J"ili::?"': @) p=w(cosc+psina)
      angle between them is
                                                    where p = 15119 = coefficient of fiction
      (A) 90.                                       between tl e plane and the body.
      (B) t2o,
      (C) O'                                    6. tvo balls of equal mass and of
      (D)   60.                                     #T:lj,t::T,"HT,ir"*:;
                                                   velocity u is made to strike the
  B. In order to determine the effects of          second ball. Both the balls after
     a force acting on a body, we must             impact will move with a velocity
     know                                           (o) u
     (A) the magnitude of the force
     (B) the line of action of the force           (B) 2u
     (C) the nature of the force, i.e.,
          whether the force is push or             (C) 4u
          pull
     (D) All of the above
                                                   (D} E'u
  4. T\rro like paratlel forces ar€ actinc at
     a distance of 24mm apart and tileir        7' The coelficient of static friction
     resultant is 20 N, If the line of action      between two surfaces depends on
     of the resultant is 6 m1- from anv
     given force, the two forces are               (A)
                                                   (r, the nature of the surface
     (A) 15 N and 5 N                              (B) the shape of the surface in
                                                        contact
     (B) 2ON and 5N
     (C) 15 N and 15 N                             (C) the area of contact
     (D) None of the above                         (D) All of t}re above


JE/I]ND /ME/t/24123_A                       2
APSC JE 2024 question paper, Junior Engineer, PWRD and PW (Building and NH) Department (Advt. 10/2024), Mechanical Engineering, page 3 of 16
Page 3 of 16
Text of page 3
The limiting friction between two                The liquid aur{aces have a tcndency
      bodies in contact is independent of              to contract. This phcnomenon is due
                                                       to
      (A) the nature of the surfaces in
           contact                                     (A) surface tension
      (B) the area of the surfaces in                  (B) viscosity
           contact                                     (C) friction
      (C) the nonnal reaction between                  (D) dispersion
           the surfaces
      (D) All of tlle above                        13. A strcamline is a line
                                                       (A) which is normal to the velocity
 9. The point of application where tlle                     vector at every point
    total weiBht can bc expected to be
    concentated if the gravitational                    (B) which represents ttre lines of
                                                            constant velocity potential
    force is dispersed across the volume
    of the body is called                               (C) which is normal to the lines of
                                                            constant stream function
      (A) the surface of the body
                                                        (D) which is tangential to the
      (B) the centroid of the body                          velocitSl vector everyrvhere at a
                                                            given instant '
      (C) the centr€ of gravity of the body
      (D) moment of inertia
                                                   L4. The Bernoulli's equation refers to the
                                                       conservation of
10.   An ideal fluid is defined as the fluid
      which is                                          (A) mass
      (A) incompressibleandnon-viscous                  (B) linear momentum
                                                        (C) viscosity
      @) compressible only
                                                        (D) energ/
      (C) incompressiblconly
      (D) compressible and viscous
                                                   15. The ratio of the specilic weight of
                                                       liquid to tJ:e specific weight of pure
11,   Poise is the unit of                             water at a standard temperature i8
                                                       called as
      (A) surface tension
                                                        (4 surface density
      @) viscosity                                      (B) sp€cific gravity
       (C) capillarity                                  (C) mass density
       (D) shcar stress in fluids                       (D) surface tension


JE/PwD/ME/r/24123-A                            3                                      I P.T.O.
APSC JE 2024 question paper, Junior Engineer, PWRD and PW (Building and NH) Department (Advt. 10/2024), Mechanical Engineering, page 4 of 16
Page 4 of 16
Text of page 4
15. In flow through a pipe, the transition 2o. A vessel of 4 m3 contains at1 oil
      from laminar to turbulent flow does             which weighs 3O kN. The specific
      not depend on the                               weight of the oil is
      (A) density of the fluid                        (A) a.S kN/m3
      (B) length of the pipe                          (B) 6 kN/m3
      (C) diameter of the pipe                        (C) 7.5 kN/m3
      (D) velocity of the fluid
                                                      (D) t0 kN/m3
 17. The pressure of fluid is measured 21. A jet of water discharging from a
     bY                                    40 mm diameter orifrce has
     (A) pitot tube                        minimum area corresponding to dia
                                           of 24.4 mm at its vena contracta.
     (B) barometer                         The coellicient of contraction is
     (C) manometer                         (A) 0.46
     (D) lactometer                                   (B) O.37
                                                      (c) 0'78
 18. when a vertical wall is subjected to
     prresaure due to liquid on both   sides,         (D) 0.87
     the resultant pressure is the _     of
     the two pressures'
                                                  22. The length AB of a pipe ABC in
     (A) sum                                          which a liquid is flowing has
                                                      diameter dr     and is suddenly
     @| dilference                                    enlarged to d-iameter e at B which
     (C) arithmetic mean                              is constant for the length BC' The
                                                      loss of head due to sudden
     (Dl geometric mean                               enlargement is


 19. A uniform body 3 m long, 2 m wide                (A) @t - uzl2
                                                                g
     and I m deep floats in water. If tJ:e
     depth of immersion is 0.6 m, then                         _G
     the weight of the body is                        (B) "?
                                                               (,
     (4 3.s3 kN
     (B) 33.3 kN                                      (c) -@t -uzl2
                                                               2g
     (c) ss.3 kN
     (D) None of tJ:e above


JE/Pl,iD/MElrl24l23-a                         4
APSC JE 2024 question paper, Junior Engineer, PWRD and PW (Building and NH) Department (Advt. 10/2024), Mechanical Engineering, page 5 of 16
Page 5 of 16
Text of page 5
23. The most economical section of a                 On which of the following factors
    trapezoidal channel is one which has             does the resistivity of a material
    hydraulic mean depth equal to                    depend?

                                                     (A) Resistance of the conductor
    (A) l " dePth
                                                     (B) Ar€a of the conductor section
    (B) 1x breadth                                   (C) L.ngth of the conductor
                                                     (D) All of the above
    (c) ]x sloPing side
                                                 27. Which of the fouowing is the Poor
    P1 |x @ePth + breadth)                           conductor of electricity?

                                                      (A) Silver
                                                      (B) Copper
    The kinematic viscosity (in stokes) of            (C) Carbon
    an oil, whose specifrc gravity is O'95
    and viscosity is O'011 poise, is                  (D) Steel
    (A) 0.0r16
     (B) 0.116                                   2A. Which of the following will affect the
                                                     resistance of a conductor inverscly?
     (c) 0.06r r
                                                      (A) l€ngth of the conductor
     (D) 0.611
                                                      (B) Potentialdillerence
                                                      (C) Area of cross-section
25. The ratio of the quantity of liquid               (D) Temperature of the conductor
    discharged pcr second from the
    pump to the quantity of liquid
    passing per second through the
                                                      Which of the following can vary with
     impeller is known as
                                                      AC, but not with DC?
     (A) manometriceffrciency                         (A) Power
     (B) mechanicalelliciency                         (B) Voltage
     (C) overall efliciency                           (C) Frcquency
     (D) volumetric effrciency                        (D) Magnitude


JElPwDlMElU24l2s-A                           5                                      lP.T.O.
APSC JE 2024 question paper, Junior Engineer, PWRD and PW (Building and NH) Department (Advt. 10/2024), Mechanical Engineering, page 6 of 16
Page 6 of 16
Text of page 6
30. As capacitor plate area increases          34. Carnot cycle consists of which of the
      (A) the capacitance incrcases                 following processes?

      (B) the capacitance decreases                   (A) Two isothermal proccsses and
                                                          two isentropic processeg
      (C) the capacitance does not
           change                                     (B) Two isentropic processes and
                                                          two constant-volume processes
      (D) the current-handling ability
           decreases                                  (C) Two isentropic processes and
                                                          two constant-presgure p[rcegges
 31. The period (in seconds) of an AC
     wave is                                          (D) Two isentropic processcs, one
                                                          constant-volume process and
      (A| the sarne as the frequency in                   one constant-pressure proccss
           }r.erE
      (Bl not related to the frequency in
           any way                              35.   For the same compression ratio, the
                                                      effrciency of an air-standard Otto
      (C) equal to 1 divided by the                   cycle is
          frequency in hertz
      (D) equal to the peak amplitude in              (A) more than the elliciency of an
                                                          air- standard Diesel cycle
          volts divided by the frequency
          in hertz                                    (Bl less than the efficiency of an
                                                          air- standard Diesel cycle
 32. The sixth harmonic of an AC wave,
     whose period iE l.0OO millisecond                (C) equal to tfie elEciency of an
     (l'OO0 ms|, has a frequency of                       air- standard Diesel cycle

      (A) 0.006 Hz                                    (D| None of the above
      (B) t67.OHz
      (Cl 7.000 kHz                             36. An ideal gas at 27.C is heated at
      (D) 6.000 kHz                                 constant pnessure till its volume
                                                    becomes three times. The final
                                                    temperature of the gas will be
33.   Entropy change depends on
      (A) heat transfer                               (A) 9r.C
      (B) mass transfer                               (B) 910.C
      (C) change of temperatur€                       (cl 627.c
      (D) thermodynamic state                         (Dl e27.c

JElwlDlMElt/24123-A                         6
APSC JE 2024 question paper, Junior Engineer, PWRD and PW (Building and NH) Department (Advt. 10/2024), Mechanical Engineering, page 7 of 16
Page 7 of 16
Text of page 7
37.   The bomb caloriEeter is           an        4t. When a system changes its state from
      apparatus to measure the                        one equilibrium state to another
                                                      equilibrium state, then the path of
      (A) calorifrc value of a gaseous fuel           successive states through which the
                                                       system has passed is known as
      (B) calori{ic value of solid and
          gaseous fuels                                (A) thermodynamic law
      (C) calorimetric composition of any              (B) thermodynamic process
          solid bomb material                          (C) thermodynamic rycle
      (D) calorifrc value of a solid or                (D) None of the above
          liquid fuel
                                                  42. "When two bodies are in thermal
                                                      equilibrium urith a third body, they
                                                      are also in thermal equilibrium with
38. Internal energl is a function of
                                                      each other.' This statement is called
      (A) only pnessure                                (A) z:roth law of thermodynamics
      (Bl only temperature (absolute)                  (B) first law of thermodl'r:amics
      (C) only volume
                                                       (C) second law of thermodynamics
                                                       (D) Kelvin-Planck law
      (D) pressure and temperature
                                                  43. The reading of the pressure gauge
                                                      Iitted on a vessel is 25 bar, The
39. Zeroth law of thermodynamics gives                atmospheric pressure is 1'03 bar
    the concept of                                    and the value of g is 9'81 m7s2. The
                                                      absolute pressure in the vessel is
      (4 internal ener$r                               (A) 23'97 bar
      (B) heat content                                 (B) 25'00 bar
      (C) pressure                                     (C) 26.03 bar
      (D) temperature                                  (D) 34'84 bar
                                                  44. The property of a working substance
40. The specific heat of air at const8nt
                                                       which increases or decreases
                                                       according to the heat supplied or
    pressure (Cr| is equat to
                                                       removed in a reversible manner is
      (A) O'17 kcal/kg-'Q                              called
                                                       (A) enthalpy
      (B) 0'21 kcal/kgrQ
                                                       (B) entropy
      (C) o'24 kcal/kg-'C                              (C) reversibility
      (D) l'41 kcal/kgrc                               (D) None of the above


JE,lPwD lMElrl24l23-A                         7                                     I P.T.O.
APSC JE 2024 question paper, Junior Engineer, PWRD and PW (Building and NH) Department (Advt. 10/2024), Mechanical Engineering, page 8 of 16
Page 8 of 16
Text of page 8
45. 'The heat Ilows from a cold body to a           49. The mechanical draught _            with
    hot body with the aid of an external                the amount of smoke.
    source." This statement is given by
                                                          (A) incrcases
      (A) Kelvin
                                                          @l decreases
      (B) Joule
                                                          (C) does not affect
      (C) Clausius
                                                          (D) None of the above
      (D) Gay-Lussac
                                                    50. The process of draining steam from
46. When there is mass transfer across                  the turbine at certain points during
    the system boundary, the system is                  its expansion and using this steam
      called                                            for hcating ttre feedwater in feed-
      (A) isolated system                               water heaters and then supplying it
                                                        to the boiler is known as
      (B) closed system
                                                          (A) regenerativeheating
      (C) open system
                                                          (B) reheating of steam
      (D) None of the above                               (C) bleeding
                                                          (D) None of the above
47. Steady flow means that tJ e rates of
    flow of mass and ener$. acrpss the
    control surface                                 51.   Addition of heat at           constant
                                                          prressure to a gas results in
      (A) vary
      (B) remain constant                                 (A) raising its temperature
      (C) depend on the control surface                   (B) raising its pressure
      (D) None of the above                               (C) raising its volume
                                                          (D) raising its temperature and
                                                               doing extemal work
48.   A device in which some portion of
      waste heat of fuel gases is recover€d
      to heat the air before it passes to the       s2. For wire-drawing operation, the work
      fumace for combustion purpose is                  material should be
      known as
                                                          (A) tough
      (A) superheater
      (B) air preheater                                   (B) malleable
      (C) economizer                                      (C) ductile
      (D) injector                                        (D) resilient


JElWDlMElU24l2s-A                               8
APSC JE 2024 question paper, Junior Engineer, PWRD and PW (Building and NH) Department (Advt. 10/2024), Mechanical Engineering, page 9 of 16
Page 9 of 16
Text of page 9
Which is the most ductile metal                What is the purpose of annealing
      known?                                         process?
      (A) Silver                                     (A) To increase hardness
      (B) Platinum                                   (B) To decrease machinability
      (C) Gold                                       (C) To remove internal stress
      (D) Copper                                     (D) For surface hardening
      The product from blast furnace is       59.    Maximum surface hardness is
      called                                        attained by
      (A) pig iron                                  (A) cyaniding
      (B) cast iron                                 (B) carburizing
      (C) wrought iron                              (C) flame hardening
      (D) steel                                     (D) nitriding
      The p€rcentage of carbon in cast              The blade of a power hacksaw is
      iron usually varies between                   made of
      (A) O' I % to O.2o/o                          (A) high-carbon steel
      (B) 0.5% to t.Oo/o                            (B) mild steel
      (C) l'OYo to l.5o/o                           (C) high-speed steel
      (Dl 2'5o/o to 4-5o/o                          (D) medium-carbonsteel
     Which one of the following crystal       61. What is the elIect of the slip of the
     systems is valid for gold?                   belt on the velocity ratio of the belt
     (A) Orthogonal                               drive?
     (B) Cubic                                      (A) Increases
     (C) Hexagonal                                  (B) Decreases
     (D) Tricunic                                   (C) May increase or decreass
                                                    (D) Remains constant
 s7. The BCC and HCP metals undergo
     plastic deformation by                         If the number of links in a
     (A) slip                                       mechanism is 6, the number of pairs
                                                    would be
     (B) twinning                                   (A) I
     (C) edge dislocation                           (Bl 2
     (D) twinning in combination with               (c) 4
          slip                                      (D) s

JE/P\ND IMEl1/24123_A                     9
                                                                                lP.T.o.
APSC JE 2024 question paper, Junior Engineer, PWRD and PW (Building and NH) Department (Advt. 10/2024), Mechanical Engineering, page 10 of 16
Page 10 of 16
Text of page 10
63. The relation between the number of            66. There are six gears A, B, C, D' E arrd
    links (I) and the number of pairs (P)             F in a compound train. The numbers
    is                                                of teeth in the gears are 20, 60, 30'
                                                      80, 25 and 75 respectively. The ratio
     (A) L=2P -3                                      of angular speeds of the driven (F) to
     (B) L=2P-2                                       the driver (A) of the drive is
     (c) L=2P'4                                               I
                                                         (A) 24
     (D) L=3P-4
                                                                I
                                                         (B) 8
64. The two elements of a Pair are said
    to form a higher Pair, when theY                          4
                                                         (c) i3
    (A) have a surface contact when in
          motion                                         (D) 12
     (B) have a line or Point contact
         when in motion
     (C) arc kePt in contact bY the               67. Porter govemor is a/an
          action of extcrnal forces when
          in motion                                      (A) dead-weight governor
      (D) permit relative motion                         (B) p€ndulum-t)Pc governor
                                                         (C) spring-loaded governor
 65. One end of a helical sPring is fixed
     while tl:e other end carries the load               (D) inertia governor
      W which moves with simPle
      harmonic motion. The frequencY of
      motion is gven bY
                                                   68.   For two govemors A and B the lift of
                                                         sleeve of govemor A is more than
      (4 2tt                                             that of Sovernor B, for a given
                                                         fractional change in sPeed. It
                                                         indicates that
      t' ai.*F                                            (A) governor A is more sensitive
                                                                than govemor B
      (C) 2tt                                             (B)   governor B is more setrsitive
                                                                than .govemor A
             1 16                                         (c)   both govemors A and B arc
       (D) 2.{;                                                     equally scnsitive

       where 6 = detlection of the sPring.                (D)       None of tlie above



 JE/PwD/ME/l/24123-A                         10
APSC JE 2024 question paper, Junior Engineer, PWRD and PW (Building and NH) Department (Advt. 10/2024), Mechanical Engineering, page 11 of 16
Page 11 of 16
Text of page 11
69. A disturbing mass ml attached to                   The relation between tool life (?) and
      the rotating shaft may be balanced                cutting speed (V) is l{la constant.
      by a single mass m2 attached in the                                        =
                                                        In this relation, the value of n
      same plane of rotation as that of m1,             depends upon
      such that
                                                        (A) work material
      (l{) m{2=nbrr
                                                        (B) tool material
      (B) mr\ = tn2r2
                                                        (C) working conditions
      (C) mlnt2 = \r2
                                                        (D) type of chip produced
      (D) None of the above
 7O. When elements like nickel, chromium,        74.    A steel is heated at about 975.C
      copper and molybdenum are added to
                                                       where the structure consists of
     the molten cast iron, it produces                 austenite entirely. It is then cooled
                                                       suddenly at a temp€rature of about
     (A) white cast iron                               250 "C to 525.C. This process of
     (B| nodular cast iron                             heat treatment is known as
     (C) malleable cast iron                           (A) normalizing
     (D) alloy cast iron                               (B) annealing
                                                       (C) austempering
 71. According to the Indian standard
     specifications, plain carbon steel                (D) martempering
     designated by 4OCg means that the
     carbon content ia                                 The process in which carbon and
     (Al o.o4o/o                                       nitrogen botl are absorbed by the
                                                       metal surface to get it hardened is
     (B) 0.35olo to O.45o/o                            known as
     (Cl O'4o/o to 0.60/o                              (A) cyaniding
     (D) 0.6% to O.8o/o                                (B) carburizing
72. Which of the following gives the                   (C) Ilame hardening
    correct order of increasing hot                    (D) induction hardcning
     hardness of cutting tool materials?
     (A) High-speed steel, Diamond,                    What is an IC engine?
         Carbide                                       (A) The fuel is ignited and bumed
     (B) Carbide, Diamond, High-speed                      inside the engine
         steel                                         (B) The fuel is burned insidc a
     (C) Diamond, Carbide, High_speed                      combustion chamber
         steel                                         (C) The fuel is ignited inside a
    (D) High-speed steel, Carbide,                         combustion chamber
         Diamond                                       (D) None of t}re above

JE/ruD/ME/|/24123-A                         tl                                      IP.T.O.
APSC JE 2024 question paper, Junior Engineer, PWRD and PW (Building and NH) Department (Advt. 10/2024), Mechanical Engineering, page 12 of 16
Page 12 of 16
Text of page 12
77. What is the function of an                        81. Young's modulus is defined as the
    alternator?                                           ratio of
    (A) Recharging the battery                             (A) volumetric stress            and
                                                               volumetric strain
     (B) Voltage regulator
                                                           (B) lateral str€ss and lateral strain
     (C) Auto-ignition
                                             .             (C) longitudinal stress and
     (D) None of the above                                     longitudinat strain
                                                           (D) shear str€sa and shear strain
?8. The internal resistance which the
     body offers to meet with tl:e load or
     external force is called                         82. A lap joint is always in        shear.

     (A) stress                                           (A) single               -
     (B) strain                                            @) double
     (c) pressure                                          (C) Both (A) and (B)
     (D) None of the above                                 (D) None of the above

                                                      ta. Tearing of the plate between the
79. The law which states that within                       edges ot plate and rivet-hole takes
    elastic limits, the strain produced is                 olJce when
     proportional to the stress producing
     it, is known as                                       (A) they are near to each other
     (A) Bernoulli's law                                   (B) the hole is too near the edge
     (B) Hooke's law                                       (C) the diameter of the rivet is too
                                                                small
     (C) stress law
                                                                                   plate are or
     (D) poisson,s law
                                                           '' :h.ff:€nd
8O, What is factor of safety?                         84. ln zieag,lap joint formation, when P
                                                           is the pitch between the rivets, the
     (A) The ratio of stress to strain                     distance between the rows of rivets
                                                           should not be less than
     (B) The ratio of permissible stress
          to ultimate stress                               (Al O.6p
      (C) The ratio of ultimate stress to                  (B) O.8p
          permissible stress
                                                           (c) P
      (D) The ratio of longitudinal strain
          to longitudinal stress                           (D) 1'2P


JE/f,rJ.tD /ME/t/24123-A                         L2
APSC JE 2024 question paper, Junior Engineer, PWRD and PW (Building and NH) Department (Advt. 10/2024), Mechanical Engineering, page 13 of 16
Page 13 of 16
Text of page 13
85.    In butt joint, when two straps are            88. Shear force at any point on the beam
         used, the thickness varies bctween                is the algebraic sum of
                to      (t is the thickness of
         plate to be connected).                            (A) all vertical forces
         -          -
         (A) a 1.12sr                                       (B) all horizontal forces
         (B) 0.7r, 0.8f                                     (C) forces on either side ofthe point
         (c) o.s/, r                                       (D) moments of forces on either
        (D) f, 1.s,                                             side of the point


 86.    A simply supported beam with a                89. The point of contrallexurc occurs
        gradually varying load from zero at B             only in
        and ru per unit length at A is shown
        in the frgure below :                              (A) continuous beams
                                                           (B) cantilever beams
                                                           (C) overhanging beams
                                                           (D) simply supported b€ams

        The shear force at B is equal to              90. A cantilever beam is loaded with udl
                                                          throughout. The maximum shear
        (46utl                                            force occurs at
                                                           (A) free end
             tttl
        (B} T                                              (B) fixed end
        lcl wt                                             (C) centre
        (D) 2ui
             3
                                                           (D) point of contrallexure


47. The columns, whose slendcmess                     91. Which of the following refers to the
        ratio is less than 80, are known as               term COP' of refrigeration?
        (4 short columns                                   (A) Cooling for Performance
        (B) long columns                                  (B) Coeflicient of performance
        (C) weak columns                                  (C) Capacity of Performance
        (D) medium columns                                (D) Coefiicient of plant

JEIPWD /MElt/24123_A                             13
                                                                                         IP.T.O.
APSC JE 2024 question paper, Junior Engineer, PWRD and PW (Building and NH) Department (Advt. 10/2024), Mechanical Engineering, page 14 of 16
Page 14 of 16
Text of page 14
92. Carnot heat pump works between                97. Which of the following is the
    27 'C ar,d 327 'C. What will be its               material of tubes used for shell-and-
    COP?                                              tube coirdenser in ammonia
                                                      refrigeration system?
     (A) 0.0e         (B) 1.00
                                                       (A) Copper
     (c) l.oe         (D) 2.0
                                                       (B) Steel
    The domestic refrigerator operating
    on vapour compression cYclc uses                   (C) Brass
    which of the following devices for                 (D) Aluminum
     expansion?
     (A) Thermostatic valve
     (B) Thermostat
                                                  98. Which of the following i3 rrepreeentd
                                                       by curved lines on tJ:e psychrometric
     (C) Capillary tube                                chart?
     (D) Throttling valve                              (A) Specifrc humidity
     The commonly used refrigerant in                  (B) Relative humiditY
     domestic refrigerators is                         (c) wBr
     (A) ammonia                                       (D) DPT
     (Bl co2
     (C) nitrogen                                 99. What is represented by inclincd
     (D) Rrs4a                                         straight lines but non-uniformlY
                                                       spaced on the psychromctric chart?
     Which is the desirable physical                   (A) Specific humiditY
     property of a refrigerant?
     (A) Toxic                                         (B) Relative humidity
     (B) Explosive                                     (c) wBT
     (C) Low boiling point                             (D) DPT
     (D) High freezing point
                                                  1OO. Which of the following processes is/
     Which of the following is a secondary             are used in winter air-conditioning?
     refrigerant when us€d above 0 'C?
                                                        (A) Cooling and dehumidification
     (A) Sodium chloride
     (B) Glycol                                         (B) Heating and humidifrcation
     (C) Brinc                                          (C) DehumidificationonlY
     (D) Water                                          (D) Humidification only


JEIPWD lMEltl24l23-A                         t4
APSC JE 2024 question paper, Junior Engineer, PWRD and PW (Building and NH) Department (Advt. 10/2024), Mechanical Engineering, page 15 of 16
Page 15 of 16
Text of page 15
SPACE FOR ROUGH WORK




JEIPWD lMDlr/24123_a          15
                                              lP.T.O.
APSC JE 2024 question paper, Junior Engineer, PWRD and PW (Building and NH) Department (Advt. 10/2024), Mechanical Engineering, page 16 of 16
Page 16 of 16
Page 1 of 16

Source: Assam Public Service Commission. Question paper published by Assam Public Service Commission.

Other years