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Mechanical Engineering :: IC Engine and Nuclear Power Plants

  1. The probability of knocking in diesel engines is increased by

  2. A.
    high self ignition temperature
    B.
    low volatility
    C.
    higher viscosity
    D.
    all of these

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  3. A diesel engine, during suction stroke, draws

  4. A.
    air only
    B.
    diesel only
    C.
    a mixture of diesel and air

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  5. Anti-knock for compression ignition engines is

  6. A.
    napthene
    B.
    tetra ethyl lead
    C.
    amyl nitrate
    D.
    hexadecane

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  7. In an internal combustion engine, the process of removing the burnt gases from the combustion chamber of the engine cylinder is known as

  8. A.
    scavenging
    B.
    detonation
    C.
    supercharging
    D.
    polymerisation

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  9. In petrol engines, using a fixed octane rating fuel, the increase in compression ratio will not effect the knocking tendency.

  10. A.
    Agree
    B.
    Disagree

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  11. Supercharging is the process of supplying the intake air to the engine cylinder at a density __________ the density of the surrounding atmosphere.

  12. A.
    equal to
    B.
    less than
    C.
    greater than

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  13. The method of determination of indicated power of a multi cylinder spark ignition engine is by the use of

  14. A.
    Morse test
    B.
    prony brake test
    C.
    motoring test
    D.
    heat balance test

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  15. In a four stroke cycle petrol engine, , the compression

  16. A.
    starts at 40° after bottom dead centre and ends at 30° before top dead centre
    B.
    starts at 40° before bottom dead centre and ends at 30° after bottom dead centre
    C.
    starts at bottom dead centre and ends at top dead centre
    D.
    may start and end anywhere

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  17. Reflector in nuclear power plants is used to reflect neutrons back into the active core.

  18. A.
    True
    B.
    False

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  19. During idling, a petrol engine requires __________ mixture.

  20. A.
    lean
    B.
    rich
    C.
    chemically correct

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