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

MPSC AE 2014: Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2

  • Paper code: 48
  • Language: Bilingual
  • 32 pages
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 1 of 32
Page 1 of 32
Text of page 1
- -
              Code : 203
BOOKLET No.
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 2 of 32
Page 2 of 32
Text of page 2
&;~T~T/SPACE
           FOR ROUGH WORK
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 3 of 32
Page 3 of 32
Text of page 3
1.   The portion of the internal energy of a system associated with the kinetic energies of
     the molecules is called
     (1) Latent energy                             (2) Sensible energy
     (3) Potential energy                          (4) Flow energy


2.   The heat absorbed or rejected during a polytropic process is

     (1)    (5)      x work done


     (3)    [      112
                            x workdone             (4)   5)    3
                                                                   xwork done



3.   The first law of thermodynamics is essentially an expression of
     (1) conservation of mass principle
     (2) conservation of momentum principle
     (3) conservation of energy principle
     (4) conservation of air principle


4.   In a reversible cycle, the entropy of the system
     ( 1)   increases                              (2) decreases
     (3) does not change                           (4) first increases and then decreases


5.   The loci of saturated liquid line and saturated vapour line meet at
     (1) critical point                            (2) boiling point
     (3) ice point                                 (4) triple point
                        \




6.   "The cyclic integral at 68/Tis always less than zero" is called 'Clausis Inequality' and
     is valid for
     (1) all cycles, reversible and irreversible
     (2) only reversible cycles
     (3) only irreversible cycles
     (4) None of the above
mcnlYli.1161WT ISPACE FOR ROUGH WORK                                                  P.T.O.
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 4 of 32
Page 4 of 32
Text of page 4
203                                           4                                           A

7.    Availability Function is expressed as
       (1) a = (U + PoV - ToS)                     (2)   a = (U + PodV + TodS)

       (3)   a = ( d U + P o d V - TodS)           (4)   a = (U + PoV + ToS)


8.     Multistage compression with inter-cooling is especially attractive when a gas is to
       be compressed a t
       (1) very low pressure                       (2)   normal pressure
      (3) very high pressure                       (4)   None of the above


9.    If tapered bar is subjected to tensile load, where diameter of rod varies from (D + a)
      to (D - a), the percentage error involved in calculation of Young's modulus using
      mean diameter is




10.   A simply supported beam of length 'L' is subjected to uniformly varying load whose
      intensity varies from zero at one support to W' a t the other. Maximum bending
      moment in the beam is




11.    Simply supported beam of length 'L' is subjected to central point load 'W'. What is
       the strain energy stored in the beam, when 'E' is modulus of elasticity and 'I' is
       moment of inertia of section ?




&IT   5 F l l T d G l l T I SPACE FOR ROUGH WORK
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 5 of 32
Page 5 of 32
Text of page 5
12.   When body is subjected to two mutually perpendicular like stresses ox and oy, then
      centre of the Mohr's circle from vertical axis is a t




13.   A beam of circular section is subjected to shear force. Theq maximum shear stress
      across the section of beam is             greater than mean stress.
      (1) 24%                                   (2) 29%
      (3)   30.33%                                 (4)   33.33%


14.   A beam of uniform section and length 'L' simply supported a t ends carries point load
                       'L'
      W. At a distance - from one end, maximum deflection in beam' is
                        3




15.   There are two shafts of same material, one shaft is solid with diameter 'D' while the
                                                                             'D'
      other is hollow with external diameter 'D' and internal diameter T. Length of both
                                                                              A

      shafts is equal and are used to transmit same torque. What is the ratio of angle of
      twist for hollow shaft to solid shaft ?




16.   Principal stresses a t a point in elastic material are '1.5 f ' (tensile), 'f' (tensile) and
       1
      '- f ' (compressive). If elastic limit in simple tension is 200 N/mm2, what is the value
       2
      of 'f' a t failure according to maximum shear stress theory ?
      (1) 200 Nlmm 2                               (2)   150 Nlmm 2
      (3)   125 N/mm2                              (4)   100 Nlmm 2
M VI'WdmI SPACE FOR ROUGH WORK                                                             P.T.O.
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 6 of 32
Page 6 of 32
Text of page 6
17.    When cantilever is loaded at its free end, then variation of bending stress across the
       section is
       (1) L'in ear^                                (2) Parabolic
       (3) Hyperbolic                               (4) Elliptic


18.    Which of the following techniques does not require quenching to obtain final case
       hardness ?
       (1) Flame hardening                          (2) Induction hardening
       (3) Nitriding                                (4) Carburizing


19.    As compared to the engineering stress - engineering strain curve, the true
       stress - strain curve for a given material
       (1) lies above and to the left
       (2) lies below and to the right
       (3) crosses the engineering stress - strain curve
       (4) is identical


20.    Regarding recrystallization, which of the following statements is not correct ?
       (1) Higher the amount of cold work, lower is the recrystallization temperature.
       (2)   Higher the recovery, higher is the recrystallization.
       (3) Higher is the temperature of cold work, higher is the recrystallization
           temperature.
       (4) Finer the initial grain size, higher is the recrystallization temperature.

21.    The microstructure of eutectoid steel is                at room temperature.
       (1) ferrite and pearlite                     (2) pearlite
       (3) ferrite and austenite                    (4) cementite
-
2:2.   The molten metal is forced through an orifice into a stream of high velocity air in

       (1) sintering                                (2) granulation
       (3)   atomization                            (4) electrolysis
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 7 of 32
Page 7 of 32
Text of page 7
23.       Muntz metal is an alloy of
          (1) zinc and lead                             (2)   copper and zinc
          (3) tin and zinc                              (4) lead and white metal


24.       Creep is specially taken care of while designing
          (1) turbine rotor and casing                  (2) drilling machines
          (3) shapers                                   (4) refrigeratorq ,


25.       In white cast iron, carbon is present as
          (1) graphite flakes                           (2) graphite nodules
          (3) combined cementite                        (4) carbon does not exist


26.       If the thermal conductivity is observed in decreasing order, which of the following
          lists is correct ?
          (1) Copper, Aluminium, Silver, Iron
          (2) Silver, Copper, Aluminium, Iron
          (3) Aluminium, Iron, Silver, Copper
          (4) Iron, Silver, Copper, Aluminium
                         -




27.       Convective heat transfer coefficient depends
          (1) only on thermodynamic and transport property of carrier fluid
          (2) only on nature of fluid flow
          (3) only on geometry of surface and prevailing thermal conditions
          (4) All of the above

28.       Time required to cool a heated copper ball depends on which of the following
          properties of copper ball ?
          (1) Thermal conductivity only
          (2)       Thermal conductivity and specific heat
          (3) Specific heat only
          (4) Thermal conductivity or specific heat

~     W   I     T    R   ~I W
                           SPACE FOR ROUGH WORK                                       P.T.O.
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 8 of 32
Page 8 of 32
Text of page 8
203                                           8
29.    Real surface in radiation heat transfer is
       (1) black body
       (2) gray body
       (3) having emissivity dependence on the wavelength of radiation
       (4) None of the above


30.   If a heated plate is kept vertical in atmospheric air, its thermal boundary layer
      formation will be from
      (1) top end                                   (2) bottom end   ,


      (3) mid point of plate                        (4) simultaneously from both ends


31.   Plate heat exchanger does not have the following feature :
      (1) Very high film conductance on both sides of plate
      (2) Requires much lower floor area as compared to shell and tube heat exchanger
      (3) Less costly than shell and tube type for costly construction material
      (4) Difficult to clean


32.   Which statement is not true about Fick's law of mass transfer ?
      (1) Mass diffusion is due to concentration gradient.
      (2) The movement of a diffusion substance is in the direction of increasing
          concentration.
      (3) Diffusion constant for ideal gases is assumed constant.
      (4) Law is valid for all states of matter.
-

33.   Ratio of thermal diffusivity to mass diffusivity is designated by a non-dimensionless
      number, known as
      (1) Schmidt number                            (2) Sherwood number
      (3) Lewis number                              (4) Stanton number

      TWRT& GilTf I SPACE FOR ROUGH WORK
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 9 of 32
Page 9 of 32
Text of page 9
34.   In the design of machine-parts, specific stiffness is an important parameter. This is
      given by which of the following expressions ?

            Strength                                  Young's modulus
      (1)                                       (2)
            Density                                       Density

               Density                                Density
      (3)                                       (4)
            Young's modulus                           Strength



35.   The ability of a material to absorb energy per unit volume without fracture is known
      as

      (1) Toughness                             (2) Resilience

      (3)   Stiffness                           (4) Yield strength



36.   For ductile materials, design of shaft is based on which of the following failure
      theories ?

      (1) Maximum normal stress theory

      (2) Maximum shear stress theory

      (3) Distortion energy theory

      (4)   Von Mises theory



37.   The combined spring rate for springs connected in parallel having individual spring
      rates kl, k2, k3 is given by




                                                                            - -



ovullem 1 SPACE FOR ROUGH WORK                                                      P.T.O.
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 10 of 32
Page 10 of 32
Text of page 10
38.   In the design of a solid circular shaR of diameter "d" and moment "M;' based on
      torsional load condition, the torsional stress   (dis given by




39.   A system of rotating masses is in dynamic balance, when there does not exist any

      (1) resultant centrifugal force
      (2) resultant couple
      (3) resultant centrifugal force as well as resultant couple
      (4) unbalanced mass



40.   How many degrees of freedom will a double pendulum as shown in the figure have ?




      (3) 2                                       (4) Infinite

              WTI I SPACE FOR ROU~GHWORK
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 11 of 32
Page 11 of 32
Text of page 11
41.   The equation of vibration of the water column in a U-tube as shown in figure is given
      by




42.   In case of large guns, to achieve minimum return time, the damping coefficient is
      kept
      (1) greater than one                       (2) equal to one
      (3) less than one                          (4) equal to two


43.   When the shaft is bent alternately, and tensile and compressive stresses due to
      bending are developed, the vibrations in shaft are said to be
      (1) longitudinal                           (2) torsional
      (3) whirling                               (4)   transverse


44.   Which of the following specialised industrial devices is used for interfacing to and
      controlling analog and digital devices ?
      (1) PID controller                         (2) Adaptive control system
      (3) Programmable logic controller          (4) PD controller

ovulr cnlylYfibl XFll I SPACE FOR ROUGH WORK                                        P.T.O.
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 12 of 32
Page 12 of 32
Text of page 12
46.   "Microprocessors" which have memory and various inputiout arrangements on the
      same chip are called
      ( 1)   buses                               (2) registers
      (3) micro controllers                      (4)    attenuators


46.   Which of the following registers are used in microprocessor for temporary storage of
      operands or intermediate data in calculations ?
      (1) Instruction registers                  (2) General purpose registers

      (3) Stack pointers                         (4)    None of the above


47.   Because of high power-to-weight ratio, the hydraulic systems find a wide range of
      use in

      (1) Machine tools                          (2) Speed governing systems

      (3) Position control systems               (4) All of the above


48.   For majority of the plant and process control actions in petroleum, petrochemical,
      textile and food industries, which of the following systems is preferably employed ?
      ( 1)   Hydraulic                           (2) Pneumatic
      (3)    Electrical                          (4) None of the above
-

49.   Which of the following methods permits accurate computations of time-domain
      response in addition to yielding readily available frequency response information ?

      (1) Nyquist method                         (2) Nichols chart

      (3) Root locus method                      (4) None of the above


50.   The transient response of a system is mainly due to

      (1) inertia forces                         (2) internal forces

      (3) stored energy                          (4) friction

M W4lFd G l l T I SPACE FOR ROUGH WORK
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 13 of 32
Page 13 of 32
Text of page 13
51.   Programmable logic controllers (PLC's) consist of CPU, memory and
      circuitry as main components.
       (1)   optical sensors                    (2)   inpuidoutput
       (3)   position control system            (4)   None of the above


52.    The correct velocity triangle for the given slider-crank mechanism is shown by which
       of the following options ?




                                       G
                     Fig. for Q 52




      9>191flldl GWlT ISPACE FOR ROUGH WORK                                         P.T.O.
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 14 of 32
Page 14 of 32
Text of page 14
53.   The number of instantaneous centers of rotation (ICR) for a mechanism with 'n' links
      is given by




54.   For the slider crank mechanism shown in figure, the centripetal component of
      acceleration of connecting link AB (B with respect to A) is acting
                        A




      (1)   along AB, directed from B to A      (2) along AB, directed from A to B
      (3) perpendicular to AB a t A             (4) perpendicular to AB a t B

55.   For a cam-follower mechanism, having disc cam with roller follower, the follower has
      constant acceleration and retardation motion. The velocity diagram for this motion is
      represented as,
                      t




&             G i l T I SPACE FOR ROUGH WORK
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 15 of 32
Page 15 of 32
Text of page 15
1
56.   Two spur gears have a velocity ratio of -. The driven gear has 72 teeth of 8 mm
                                                3
      module and rotates a t 300 rpm. Then, the speed of driver gear is
      (1) 100 rpm                               (2) 300 rpm
      (3) 900 rpm                               (4) 600 rpm


57.   For the differential band brake shown in figure, the direction of externally applied
      force F is upwards for which of the following conditions ?




      (1) a = b = 100 mm

      (2) a = 125 mm, b = 100 mm

      (3)       a = 75 mm, b = 100 mm

      (4) a = 200 mm, b = 100 mm
            ,




58.   The variation in the speed of the wheels along a curvature, for a four wheeled
      passenger car, is accomplished by which of the following ?
      (1) Sliding mesh gear box                 (2) Synchromesh gear box
      (3) Differential gear box                 (4) Preselective gear box

M 91YIW161W W ISPACE FOR ROUGH WORK                                                P.T.O.
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 16 of 32
Page 16 of 32
Text of page 16
59.   Which type of gear train is shown in figure ?


                  Gear 2   n




                         Gear 1


                                                         Gear 4

      (1) Simple gear train                       (2) Epicyclic gear train
      (3) Reverted gear train                     (4) Differential gear train


60.   For a pair of gears in contact, contact ratio is
            Arc of contact                               Arc of contact
      (1)                                          (2)
            Circular pitch                                  Module
            Path of contact
                         --
                                                         Path of contact
      (3)                                         (4)
               Module                                    Circular pitch


61.   Which of the following governors is mostly used to drive a gramophone ?
      ( 1) Pickering governor                   (2) Watt governor
      (3) Porter governor                       (4) None of the above
                   ISPACE FOR ROUGH WORK
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 17 of 32
Page 17 of 32
Text of page 17
62.   A Hartnell governor is a
      (1) pendulum type governor                 (2) spring loaded governor
      (3) dead weight governor                   (4) inertia governor


63.   The engine of an aeroplane rotates in a clockwise direction, when seen from the tail
      end and the aeroplane takes a turn to the left. The effect of the gyroscopic couple on
      the aeroplane will be

      (1) to dip the nose and tail               (2) to raise the nose and tail

      (3) to dip the nose and raise the tail     (4) to raise the nose and dip the tail


64.   A disc is spinning with an angular velocity w radfsec about the axis of spin. The
      couple applied to the disc causing precession will be
      Where I = Mass moment of inertia of disc
      w = Angular velocity of precession of axis of spin.
       P




65.   If the speed of the engine controlled by the governor fluctuates continuously above
      and below the mean speed, the governor is said to be
      (1) stable                                 (2) unstable
      (3) isochronous                            (4) hunting


66.   Hammer blow is the maximum amplitude of the unbalanced force at an angle
                 with the line of stroke.

      (1) 0"               (2) 45"               (3) 90"              (4)   180"

                                           0
67.   Transmissibility is equal to one, at - =
                                          On

      (1)   1.414          (‘2)   1              (3)   1.313          (4)   1-57

w e                 I SPACE FOR ROUGH WORK                                           P.T.O.
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 18 of 32
Page 18 of 32
Text of page 18
68.    The relation between free and damped natural frequencies is given as
                    ,where 5 (zeta) is the damping ratio.




69.    The swaying couple is maximum or minimum when the angle of inclination of the
       crank with the line of stroke is equal to -
       (1) 25"and 115"                            (2) 60"and 150"
       (3)   120"and 310"                         (49   45"and 225"


70.    Direct and Reverse crank method makes the analysis of forces simple in case of

       (1) V-engine                               (2) In-line engine
       (3) Radial engine                          (4) None of the above


71.    The tractive force is maximum or minimum when the angle of inclination of the
       crank with the line of stroke is equal to
       (1) 90°and 135"                            (2)   135"and 315"
       (3) 45"and 135"                            (4)   135"and 180"


                                             (0
72.    What is the logarithmic decrement if 2 = 1.021 and 5 = 0.2 ? (5 = zeta)
                                             Od
       (1)   1.31           (2)   1-28            (3)   1.41           (4)   1.37
-
73.    The most common method of obtaining rich mixture during cold starting is
       (1) Acceleration pump system               (2) Main metering system
       (3) Idling system                          (4) Application of choke


74.    Which one of the following lubricating systems is used for two stroke IC engines ?
       (1) Wet sump lubricating system            (2) Dry sump lubricating system
       (3) Mist lubricating system                (4) Splash lubricating system

&?Ti   dGlTW I SPACE FOR ROUGH WORK
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 19 of 32
Page 19 of 32
Text of page 19
75.   The second stage of combustion in C.I. engines after the delay period, is the period of
      (1) physical delay                        (2) uncontrolled combustion
      (3) controlled combustion                 (4) after burning

76.   The                 cooling system cannot be used in high output engines due to its
      inability to meet the requirement of large flow rates of water.
      (1) evaporative
      (2) thermo-syphon
      (3) cooling with thermostatic regulator
      (4) pump cooling

77.   The ignition of the homogeneous mixture in the cylinder, before the timed ignition
      spark occurs, is known as
      (1) Delay period                       (2) Pre-ignition
      (3) Post ignition                      (4) None of the above

78.   The ignition lag time in SI Engine is normally about
      (1) 0.01 seconds                            (2)   0.0015 seconds
      (3) 0.1 seconds                             (4)   1.1seconds

79.   Dissociation refers to disintegration of burnt gases at high temperatures and it is
      alan
      (1) reversible process                     (2) irreversible process
      (3) quasi-static process                   (4) None of the above

80.   The air standard efficiency of Otto cycle is given by




81.   Whicbone of the following is true for fuel air cycles ?
      (a) There is no chemical change in either fuel or air prior to combustion.
      (b) Subsequent to combustion, the charge is always in chemical equilibrium.
      (1) Only (a)                           (2) Only (b)
      (3) Both (a) and (b)                   (4) None of the above
      5FllV& GfF'll I SPACE FOR ROUGH WORK                                             P.T.O.
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 20 of 32
Page 20 of 32
Text of page 20
82.   Which one of the following describes turbochargers of the engines ?
      (a) Centrifugal compressors driven by the exhaust gas turbines.
      (b) Turbochargers will not draw upon the engine power.
       (1) Only (a)                                (2) Only (b)
       (3) Both (a) and (b)                        (4) None of the above


83.   Which of the following casting processes is widely used for making ornamental
      objects ?
      (1) Centrifugal casting                      (2) Slush casting
      (3) Investment casting                       (4) Gravity die casting


84.   If the hot working is completed much above the recrystallization temperature, then
      (1) the grain size starts decreasing and final grain size will be smaller than at
          starting.
      (2) the resulting grain size will be fine.
                                                                                        .
      (3) the grain size starts increasing and finally may end up as coarse grain size.
      (4) the grain size is reduced and a large number of nucleation sites are developed
          for new crystals to form.


85.   In Resistance welding, the factor R (Resistance of joint) is composed of
      (i)   Resistance of electrodes
      (ii) Contact resistance between the electrode and the work-piece
      (iii) Contact resistance between the two work-piece plates
      (iv) Resistance of work-piece plates
      (1) Only (i) and (ii)                        (2) Only (ii) and (iii)
      (3) Only (i) and (iv)                        (4) All (i), (ii), (iii) and (iv)


86.   The powder metallurgy technique is applicable for
       (1) Job type production                     (2) Batch type production
       (3) Mass type production                    (4) None of the above

      OlYTWldl     I SPACE FOR ROUGH WORK
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 21 of 32
Page 21 of 32
Text of page 21
87.   Polymers usually consist of carbon plus one or more other elements, such as
      (i)   Hydrogen
      (ii) Nitrogen
      (iii) Oxygen
      (iv) Chlorine
      (1) Only (i) and (iii)                         (2)   Only (ii) and (iii)
      (3) Only (i) and (iv)                          (4) A1 (i), (ii), (iii) and (iv)


88.   In a CNC program block
      NO02 GO2 G91 X40 240 ...,
      GO2 and G91 refer to
      (1) circular interpolation in counter-clockwise direction and incremental dimension
      (2) circular interpolation in counter-clockwise direction and absolute dimension
      (3)   circular interpolation in clockwise direction and incremental dimension
      (4)   circular interpolation in clockwise direction and absolute dimension


89.   In orthogonal cutting, shear angle is the angle between
      (1) shear plane and the direction of tool travel
      (2)   shear plane and the rake plane
      (3)   shear plane and the vertical direction
      (4) shear plane and the direction of elongation of crystals in the chip


90.   Chipping of the tool may occur
      (i)   due to tool material being too brittle
      (ii) as a result of crack in the tool
      (iii) due to excessive static loading of the tool
      (iv) due to weak design of the tool
      (1) Only (i)and (ii)                           (2) All (i), (ii), (iii) and (iv)
      (3) Only (ii) and (iii)                        (4)   Only (i) and (iii)

                   I SPACE FOR ROUGH WORK                                                P.T.O.
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 22 of 32
Page 22 of 32
Text of page 22
91.    Two components of velocity in an incompressible fluid flow are given by u = x3 - y3
       and v = z3 - y3. If origin is a stagnation point and F(x, y) = 0, the third velocity
       component will be




                                -        -      -          - -   - -   - -




92.    Subsonic diffuser section is
       ( 1) divergent                               (2) divergent-convergent
       (3) convergent                               (4)   convergent-divergent


93,.   At sonic speed, Mach angle is
       (1) 0"                                       (2) 90"
       (3) 30"                                      (4)   60"


94,-   The assumption not made in the derivation of Bernoulli equation is
       (1) inviscid flow                            (2) steady flow
       (3) two-dimensional flow                     (4) uniform flow


95.    In laminar flow, the value of momentum thickness is generally taken as

       (1)       th of displacement thickness
             7

       (2)   1 r d of boundary layer thickness
             -
             3

       (3)   I
             7
               th of boundary layer thickness


       (4)   I3 dof displacement thickness

96.    The number of buckets for Pelton wheel with 30 cm runner diameter and 5 cm jet
       diameter is
       (1) 20                 (2)   16              (3)   18            (4) 24
-
Fim ZT4RTd            I SPACE FOR ROUGH WORK
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 23 of 32
Page 23 of 32
Text of page 23
97.   Minimum speed for starting delivery in a centrifugal pump depends on

      (1) overall efficiency                     (2) mechanical efficiency
      (3) volumetric efficiency                  (4) manometric efficiency
                      -




98.   The volumetic efficiency of a reciprocating air compressor depends on
      (1)   pressure ratio only
      (2)   clearance ratio only
      (3)   both pressure ratio and clearance ratio
      (4)   clearance volume


99.   Slip in the case of a centrifugal pump
      (1) reduces the flow rate                  (2)   reduces the energy transfer
      (3) reduces the speed                      (4) increases cavitation


100. In a measurement system, which of the following static characteristics are
     desirable ?
     (1) Accuracy                      (2) Sensitivity
      (3) Reproducibility                        (4) All of the above

101. Linear Variable Differential Transformer (LVDT) can be used to measure
     displacement ranging from
                                                 (2) 260 mm to 270 mm
                                                 (4) All of the above


102. Dummy strain gauges are used for
     (1) compensation of temperature changes
     (2) calibration of strain gauge
     (3) increasing the sensitivity of bridge circuit in which they are included
     (4) None of the above
                                                                                     -   -   --




103. The hand speed indicators can be used up to the speed of 20,000 rpm to 30,000 rpm
     with an accuracy of
      (1) 0.15 percent                           (2) 0-25 percent
      (3) 0.35 percent                           (4)   1.0 percent
                   I SPACE FOR ROUGH WORK                                                P.T.O.
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 24 of 32
Page 24 of 32
Text of page 24
104.    Variable reluctance transducers are ideally suitable for low pressure measurement
        as their sensitivity is
        (1) high                                    (2) low
        (3)   zero                                  (4)   None of the above
-
105.    Vacuum Pressure is
        (1) equal to gauge pressure
        (2) equal to atmospheric pressure
        (3) lower than atmospheric pressure
        (4) equal to absolute pressure
-
106.    Mercury is used in liquid filled system as it gives
        (1) high sensitivity
        (2) wide temperature range
        (3) wide temperature range and almost linear scale
        (4) All of the above
-
107.    Potentiometric Accelerometer is useful only for
        (1) low frequency application
        (2) high frequency application
        (3) both high and low frequency application
        (4) None of the above
-
1108.   W3ich part classification and coding system uses the following digit sequence ?
            12345        6789       ABCD
        ( 1 Code System                             (2) M I Class System
        (3) Opitz System                            (4) All of the above


109. In CNC Programming, M30 stands for
        (1) end of program                          (2)   end of block
        (3)   end of tape and rewind                (4) coolant onloff

WGtD            GVlT 1 SPACE FOR ROUGH WORK
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 25 of 32
Page 25 of 32
Text of page 25
110. C" Continuity used in curves refers to
         ( 1)   common curvature                   (2)   common normal
         (3) common points                         (4)   common tangents


111. The screen is scanned l e e to right and top to bottom all the time to generate
     graphics by
         (1) Vector scan                           (2) Random scan
         (3) Raster scan                           (4) Stroke writing
                ----             -   -




112. Which of the following algorithms are polygon clipping algorithms ?
         A.     Liang - Barsky
         B.     Sutherland - Hodgman
         C.     Cohen - Sutherland
         D.     Weiler - Atherton
         (1) B a n d D                             (2) A and B
         (3) B and C                               (4) A and C


113. Which one of the following is not a graphic standard ?
         (1)    GKS                                (2) STEP
         (3) Dm                                    (4) UNM


114.     To reflect any object about arbitrary line, composite transformation uses the
         following combination of transformations :
         (1)    Translation + Shear + Rotation
         (2) Translation + Rotation + Scaling
         (3) Translation + Reflection + Scaling
         (4) Translation + Rotation + Reflection


116.     In APT, to specify feeds and speeds and to actuate other features of machine,
         statement type used is
         (1)    Geometry statement                 (2) Auxiliary statement
         (3) Post Process statement                (4) Motion statement
cnvull            WTI I SPACE FOR ROUGH WORK                                    P.T.O.
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 26 of 32
Page 26 of 32
Text of page 26
116. Which thermodynamics law governs refrigerator ?
     (1) First Law of Thermodynamics
     (2) Zeroth Law of Thermodynamics
     (3) Second Law of Thermodynamics
     (4) None of the above

117. If coefficient of performance of refrigerating machine is 4, what will be the
     temperature ratio Thigher/ Tlower?
       (1) 0.8             (2)   1.25           (3)   4            (4) 2

118.   Aircraft air refrigeration is used for
       (1) coding cabin air
       (2) maintaining cabin air pressure to 1 bar
       (3) maintaining cabin temperature
       (4) All of the above


11.9. Simple air refrigeration system is useful for
      (1) ground surface cooling and for low flight speed
      (2) high flight speed in sonic range
      (3) all conditions of aircraft
      (4) None of the above

120. Standard vapour compression refrigeration system uses throttling device instead of
     expansion turbine due to
     (1) higher thermodynamic advantage
     (2) low cost of compression
     (3) None of the above
     (4) thermodynamic disadvantage is circumvented by cost reduction advantage

121. What are the components of vapour absorption refrigeration cycle ?
     (1) Compressor, condenser, throttle valve and evaporator
     (2) Compressor, condenser, expander and evaporator
     (3) Absorber, generator, condenser, throttle valve and evaporator
     (4) Absorber, pump, generator, valve, condenser, throttle valve and evaporator

&IT           WJllI SPACE FOR ROUGH WORK
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 27 of 32
Page 27 of 32
Text of page 27
122. The function of rectifier in vapour absorption refrigeration system of ammonia-water
     system is
        (1) remove traces of water from ammonia before it reaches to condenser
        (2) cost reduction of plant
        (3) absorbing more refrigerant
        (4) reducing corrosion


123. Which of the following statements is not true, in case of Water-LiBr system used in
     water chiller ?
        (1) It is more suitable involving low temperature heat source such as solar energy,
            waste heat.
        (2) Both generator and absorber run under high vacuum.
        (3) Absorption chillers are available in capacities from 100 TR to 7500 TR.
        (4) COP is more than unity.


124. What is the psychrometric process most commonly used for air-conditioning in hot
     and dry weather conditions ?
        (1) Heating and humidification           (2) Dehumidification and cooling
        (3) Adiabatic saturation process         (4) None of the above


125. Maximum fenestration (solar heat gain) heat load at 3 - 6 P.M. occurs from glass
     work in the wall/window facing          . (During Indian hot season May - June)
        (1) East            (2) West             (3) North              (4) South


126. Long-term forecasts are made for the purpose of
        (1) product diversification              (2) sales and advertising budgets
        (3) capacity planning                    (4) All of the above


127. The Hungarian Method for solving assignment problem requires
        (1) Square matrix                        (2) 3 x 2 matrix
        (3) Both of the above                    (4) None of the above
ovutr               ISPACE FOR ROUGH WORK                                             P.T.O.
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 28 of 32
Page 28 of 32
Text of page 28
128. If critical ratio is less than one, then
       (1) job is critical                       (2) job is ahead of the schedule
       (3) job is just on schedule               (4) None of the above


129. Programme Evaluation and Review Technique (PERT) takes into account
     (1) Optimistic time                  (2) Most likely time
       (3) Pessimistic time                      (4) All of the above


134). Critical Path Method (CPM)is
       (1) activity oriented                     (2) one time estimate
       (3) a planning device                     (4) All of the above


131. Basic elements of Just-in-Time (JIT) are
       (1) Flow layout                           (2) Buffer stock removal
       (3) Kanban card                           (4) All of the above
-
132. Output of material requirement planning can be
       ( 1)   order release requirement          (2) order rescheduling
       (3) planned orders                        (4) All of the above


133. Principles of scheduling focus on
     (1) Optimum task size                       (2) Optimum production plan
     (3) Optimum sequence                        (4) All of the above


13.4. Casual Forecasting can be done by
       (1) Regression and correlation analysis
       (2) Input - Output analysis
       (3) End use analysis
       (4) All of the above


135. Aggregate production planning determines
       ( 1)   Regular time production            (2) Overtime production
       (3) Subcontracting                        (4) All of the above

wWT ZtWlRd Tl'T I SPACE FOR ROUGH WORK
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 29 of 32
Page 29 of 32
Text of page 29
136. A thin planar body subjected to in-plane loading at its edge surface is said to be in


         (1) Plane stress                       (2) Plane strain

         (3) Both (1)and (2)                    (4) Neither (1)nor (2)


137. In            elements, the same interpolation function used to define the element
     geometry are also used to describe the variation of the field variable within the
     element.
         (1) parametric                         (2) isoparametric
         (3) quadratic                          (4) cubic


138. If determinant of a square matrix A is equal to zero, then the matrix A is called
                , for which the inverse is
         (1) non-singular, not defined          (2) singular, defined
         (3) singular, not defined              (4) non-singular, defined


139. The term finite element was first coined and used by             in 1960.
         (1) Turner                             (2) Argyris
         (3) Zienkiewicz                        (4) Clough


140. Maximum kinetic energy during motion is equated to the maximum potential energy
     in          method.
         (1)   Galerkin's                       (2) Separation of variables'
         (3) Laplace's                          (4) Rayleigh's


141. The three-dimensional simplex element is a flat-faced               with
     nodes.
         (1) tetrahedron, three                 (2) tetrahedron, four
         (3) cube, eight                        (4) square-pyramid, five
ovcitr           GlPlT I SPACE FOR ROUGH WORK                                      P.T.O.
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 30 of 32
Page 30 of 32
Text of page 30
142. Evaluate the shape functions N1, N2 and N3 a t the interior point P for the triangular
        element shown in the figure below.




        (1)   0.3,0.2,0.5                        (2) 0.2,0.3,0.5

        (3) 0.2, 0.4,0.4                         (4) 0.3,O-4,0.3
-
143.    Ratio of maximum to minimum characteristic dimensions is called as
        (1) characteristic ratio                 (2) aspect ratio
        (3) element ratio                        (4) parametric ratio
-

144. If the interpolation functions in the natural (local) coordinates satisfy continuity of
                    within the element and between adjacent elements, the compatibility
        requirement will be satisfied in the global coordinates.
        (1) geometry                             (2) field variable
        (3) geometry and field variable          (4) geometry or field variable


145. The              of the overall or global characteristic matrix depends on the node
       numbering scheme and the number of degrees of freedom considered per node.
        (1) range            (2) band width      (3) rank             (4) order


146.   Estimate how many observations are needed (approx) if an assembly line has 10%of
       idle time. The expected accuracy in work sampling is k 4% for a 99.7%of confidence
       level. Assume k = 3 for 99.7%confidence level.
        (1) 506              (2) 510             (3) 502              (4) 512
       Z f W F f dGlTT I SPACE FOR ROUGH WORK
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 31 of 32
Page 31 of 32
Text of page 31
147.    Consider a time study of a product manufacturing by an operator of machine, whose
        rating is 95%. The data is as follows :
        Observed time = 20 mins
        Personal allowance = 4%,
        Fatigue allowance = 2.5% of Basic time
        Contingency delay allowance = 1%of Basic time
        Contingency work Basic time = 2%of Basic time.
        Determine work content time.

        (1) 13.5 minutes                          (2)   14.65 minutes
        (3)   14.78 minutes                       (4) 14.85 minutes


148.    Method Time Measurement time study uses unit of time in
        (1) Nano seconds                          (2) Pico seconds
        (3)                                       (4) Fermi


149.    The demand of spur gear produced by a company is uniform a t 50 unitdday.
        It is estimated that each time a production is set the company incurs P 100 as fixed
        cost. Production cost is P 10, carrying cost is f 2 per unit per day and shortage cost
        is P 6 per unit per day. Estimate optimal production quantity (approximate).




150.     Arrange sequence of Data flow in manufacturing modules of ERP (Enterprise
       . Resource Planning) :

        (a) Material Requirements Planning (MRP)
        (b) Aggregate planning
        (c) Master Production Scheduling (MPS)
        (dl Shop Floor Control (SFC)
        (1) (a), (b), (c), (4
        (2) (dl, (c), (a), (b)
        (3) (b), (c), (a), (dl
        (4) (b), (c), (dl, (a)
~ v c q ~       3 ~ r mISPACE FOR ROUGH WORK
MPSC AE 2014 question paper, Maharashtra Engineering (Mechanical) Services, Gr-B Main Examination, Paper 2, page 32 of 32
Page 32 of 32
Text of page 32
3. 35. 201.   The Catch varies inversely with the size of the
              (1) nozzle                (2) droplet
              (3) obstruction           (4) sprayer
              $IT TRd   h JaT "(3) obstruction" $ 4.FT$             Ti   3%   "(3)" *,W
              ~   m     3   f   ;   .     2   o   i   ~ " m     -   ~@        "      w
              *-4.
sr.35. 201.   @       @                 @




                                mmnndt SPACE FOR ROUGH WORK
Page 1 of 32

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