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Mechanical Engineering :: Basic Mechanical Engineering

  1. If the acceleration due to gravity is doubled at any place, the weight of the body will be
  2. A.
    half
    B.
    double
    C.
    same
    D.
    2g times

  3. The coefficient of Performance for a refrigerator will be
  4. A.
    0.001
    B.
    0.10
    C.
    1.00
    D.
    above 1.0

  5. A lift descends with an acceleration of 0.5 metres/sec^2 from the top floor of a multistoried building. The time required to travel a distance of 25 metres will be
  6. A.
    5 sec
    B.
    8 sec
    C.
    10 sec
    D.
    12 sec

  7. A stone of mass 1 kg tied to a string of 1 metre long is rotated in a horizontal circle at a constant angular speed of 5 rad/sec, then the tension in the string will be
  8. A.
    5N
    B.
    10N
    C.
    15N
    D.
    25N

  9. For the steam which is initially saturated andflowing through a nozzle, the ratio of pressures at exit and inlet for maximum discharge is equal to
  10. A.
    0.545
    B.
    0.582
    C.
    0.5
    D.
    0.6

  11. To produce a spark across the gap of a spark plug, the voltage used is
  12. A.
    1000 to 2000 volts
    B.
    2000 to 4000 volts
    C.
    4000 to 6000 volts
    D.
    6000 to 10000 volts

  13. For cooling the pistons of diesel engine common fluid used is
  14. A.
    air
    B.
    water
    C.
    fuel oil
    D.
    lubricating oil

  15. The function of a carburettor is to supply
  16. A.
    air and diesel
    B.
    air only
    C.
    air and petrol
    D.
    petrol

  17. The dimensional formula MLT^2 represents
  18. A.
    velocity
    B.
    acceleration
    C.
    momentum
    D.
    force

  19. The compression ratio of a petrol engine is approximately
  20. A.
    3:1
    B.
    7:1
    C.
    18:1
    D.
    25:1