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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

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

  4. A.
    Correct
    B.
    Incorrect

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  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

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

  8. A.
    True
    B.
    False

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  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

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  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

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  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

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  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

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  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

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

  20. A.
    Yes
    B.
    No

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