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  1. In a mechanical refrigeration system, the highest temperature of refrigerant occurs
  2. A.
    Between condenser and evaporater
    B.
    In evaporator
    C.
    Before expansion value
    D.
    Between compressor and condenser

  3. In vapour compression refrigeration system, compressor is used because
  4. A.
    It increases cooling effect of cycle
    B.
    It makes possible, to remove heat from refrigerant at atmospheric pressure
    C.
    It increases the coefficient of performance of the system
    D.
    It removes thermal properties of refrigerant

  5. For gas turbines, the compressors used are
  6. A.
    Reciprocating type
    B.
    Centrifugal type
    C.
    Axial flow type
    D.
    Sliding value type

  7. At half load the steam, consumption in the throttle governed engine is 'S1' and in a cut off governed engine it is 'S2' under similar condition
  8. A.
    S2>S1
    B.
    S2=S1
    C.
    S2=S1/4
    D.
    S2

  9. In V-belts the contact between the pulley and the belt is at the
  10. A.
    Bottom only
    B.
    Both side and bottom
    C.
    Top and bottom
    D.
    Sides only

  11. Centrifugal tension in belt
  12. A.
    Reduce power transmission
    B.
    Increase power transmission
    C.
    Does not effect power transmission
    D.
    The effect is not definite

  13. Two masses of 10 gm and 4 gm are moving with equal kinetic energy. The ratio of their linear momentum is
  14. A.
    1:2
    B.
    3:1
    C.
    4:1
    D.
    1:16

  15. In a lifting machine, a load of 240 N is being raised and the velocity ratio is 20. If the efficiency of the machine is 40%, the effort is equal to
  16. A.
    20N
    B.
    25N
    C.
    30N
    D.
    35N

  17. A 98N force is sufficient to pull a 100 kg block on horizontal table at a uniforce speed. If g=9.8 m/s^2, the coefficient of friction is
  18. A.
    0.98
    B.
    0.1
    C.
    0.01
    D.
    0.098

  19. The unit of energy is S.I. system is
  20. A.
    Newton
    B.
    Pascal
    C.
    Joule
    D.
    Watt