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Home ‣ Mechanical Engineering ‣ IC Engines and Nuclear Power Plants Comments
  • Question

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


  • Options
  • A. Yes
  • B. No

  • Correct Answer
  • Yes 

    • IC Engines and Nuclear Power Plants problems

    Search Results

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

    • Options
    • A. True
    • B. False
      • Discuss
    • 2. In natural uranium, the constituents of three naturally occuring isotopes are

    • Options
    • A. U234 = 0.006%, U235 = 0.712% and U238 = 99.282%
    • B. U234 = 0.712%, U235 = 0.006% and U238 = 99.282%
    • C. U234 = 99.282%, U235 = 0.006% and U238 = 0.712%
    • D. U234 = 0.006%, U235 = 99.282% and U238 = 0.712%
      • Discuss
    • 3. A nuclear power plant differs from a conventional steam power station only in the steam generating part.

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 4. The knocking tendency in compression ignition engines for a given fuel will be

    • Options
    • A. enhanced by decreasing compression ratio
    • B. enhanced by increasing compression ratio
    • C. dependent on other factors
    • D. none of the above
      • Discuss
    • 5. The cylinder of a gas engine is made __________ than that of the petrol engine.

    • Options
    • A. smaller
    • B. larger
      • Discuss
    • 6. In a four stroke cycle diesel engine, the inlet valve

    • Options
    • A. opens at 20° before top dead centre and closes at 40° after bottom dead centre
    • B. opens at 20° after top dead centre and closes at 20° before bottom dead centre
    • C. opens at top dead centre and closes at bottom dead centre
    • D. may open and close anywhere
      • Discuss
    • 7. Special reactors, called breeder reactors, supply a net gain of fissionable material.

    • Options
    • A. True
    • B. False
      • Discuss
    • 8. Which one of the following engines will have heavier flywheel than the remaining ones?

    • Options
    • A. 30 kW four-stroke petrol engine running at 1500 r.p.m.
    • B. 30 kW two-stroke petrol engine running at 1500 r.p.m.
    • C. 30 kW two-stroke diesel engine running at 750 r.p.m.
    • D. 30 kW four-stroke diesel engine running at 750 r.p.m.
      • Discuss
    • 9. Materials which make good moderators do not make good reflectors.

    • Options
    • A. Correct
    • B. Incorrect
      • Discuss
    • 10. The cetane number of diesel oil, generally available, is

    • Options
    • A. 20 to 25
    • B. 25 to 30
    • C. 30 to 40
    • D. 40 to 55
      • Discuss

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