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Mechanical Engineering :: IC Engine and Nuclear Power Plants

  1. In a four stroke cycle diesel engine, the exhaust valve

  2. A.
    opens at 30° before bottom dead cnetre and closes at 10° after top dead centre
    B.
    opens at 30° after bottom dead centre and closes at 10° before top dead centre
    C.
    opens at bottom dead centre and closes at top dead centre
    D.
    may open and close anywhere

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  3. The two stroke cycle engines have lighter flywheel.

  4. A.
    Agree
    B.
    Disagree

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  5. The thermodynamic cycle on which the petrol engine works, is

  6. A.
    Otto cycle
    B.
    Joule cycle
    C.
    Rankine cycle
    D.
    Stirling cycle

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  7. The inlet valve of a four stroke cycle internal combustion engine remains open for

  8. A.
    130°
    B.
    180°
    C.
    230°
    D.
    270°

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  9. The correct mixture strength (by weight) for petrol is about

  10. A.
    14.6:1
    B.
    18.5:1
    C.
    20.4:1
    D.
    22.6:1

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  11. The working pressure and temperature inside the cylinder of an internal combustion engine is __________ as compared to a steam engine.

  12. A.
    low
    B.
    very low
    C.
    high
    D.
    very high

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  13. The scavenging efficiency of a four stroke cycle diesel engine is

  14. A.
    below 50%
    B.
    between 50 and 85%
    C.
    between 85 and 95%
    D.
    between 95 and 100%

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  15. The voltage required to produce a spark across the gap, between the sparking points is

  16. A.
    2000 to 4000 volts
    B.
    4000 to 6000 volts
    C.
    6000 to 10 000 volts
    D.
    10 000 to 12 000 volts

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  17. The control rods in the control system of nuclear reactors are used to

  18. A.
    absorb excess neutrons
    B.
    control fuel consumption
    C.
    control temperature
    D.
    all of these

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