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Mechanical Engineering :: IC Engine and Nuclear Power Plants

  1. In petrol engines, using a fixed octane rating fuel, the increase in engine speed will decrease the knocking tendency.

  2. A.
    Yes
    B.
    No

  3. Materials which make good moderators do not make good reflectors.

  4. A.
    Correct
    B.
    Incorrect

  5. The ignition of the charge by some hot surface within the engine before the passage of spark is called

  6. A.
    pre-ignition
    B.
    detonation
    C.
    ignition delay
    D.
    auto-ignition

  7. Special reactors, called breeder reactors, supply a net gain of fissionable material.

  8. A.
    True
    B.
    False

  9. The ratio of the indicated thermal efficiency to the air standard efficiency is known as

  10. A.
    mechanical efficiency
    B.
    overall efficiency
    C.
    volumetric efficiency
    D.
    relative efficiency

  11. The octane number of petrol, generally available, is

  12. A.
    20 to 40
    B.
    40 to 60
    C.
    60 to 80
    D.
    80 to 100

  13. The brake power is the power available

  14. A.
    in the engine cylinder
    B.
    at the crank shaft
    C.
    at the crank pin
    D.
    none of these

  15. The slowing down of fast neutrons is desirable because slow moving neutrons are more effective than fast neutrons in triggering fission.

  16. A.
    Agree
    B.
    Disagree

  17. The air standard efficiency ofan I.C. engine is given by (where r = Compression ratio, and γ = Ratio of specific heats)

  18. A.
    1 - rγ - 1
    B.
    1 + rγ - 1
    C.
    D.
    none of these

  19. A diesel engine has inlet valve, fuel injection valve and exhaust valve.

  20. A.
    Yes
    B.
    No