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

  • The increase of cooling water temperature in petrol engine will __________ the knocking tendency.


  • Options
  • A. not effect
  • B. decrease
  • C. increase

  • Correct Answer
  • increase 

    • IC Engines and Nuclear Power Plants problems

    Search Results

    • 1. The primary fuel used in nuclear power plants is

    • Options
    • A. U235
    • B. U238
    • C. Pu239
    • D. Pu233
      • Discuss
    • 2. The brake power of a diesel engine, keeping other parameters constant, can be increased by

    • Options
    • A. decreasing the density of intake air
    • B. increasing the temperature of intake air
    • C. increasing the pressure of intake air
    • D. decreasing the pressure of intake air
      • Discuss
    • 3. U233 is produced

    • Options
    • A. artificially
    • B. as basic raw material
    • C. when thorium is irradiated by neutrons
    • D. by fission of U238
      • Discuss
    • 4. In nuclear power plants, due to reflector, less fuel is needed to generate sufficient neutrons to sustain a chain reaction.

    • Options
    • A. Yes
    • B. No
      • Discuss
    • 5. The thermal efficiency of diesel engines is about

    • Options
    • A. 15%
    • B. 30%
    • C. 50%
    • D. 70%
      • Discuss
    • 6. The detonation is also called knocking or pinking.

    • Options
    • A. Yes
    • B. No
      • Discuss
    • 7. The reference fuels for knock rating of spark ignition engines would include

    • Options
    • A. iso-octane and alpha-methyl naphthalene
    • B. normal octane and aniline
    • C. iso-octane and normal hexane
    • D. normal heptane and iso-octane
      • Discuss
    • 8. In a four stroke cycle petrol engine, the charge is compressed when both the valves (i.e. inlet valve and exit valve) are closed,

    • Options
    • A. Agree
    • B. Disagree
      • Discuss
    • 9. Ordinary water is sometimes used as moderator when enriched uranium is used as a fuel in nuclear power plants.

    • Options
    • A. Yes
    • B. No
      • Discuss
    • 10. The object of supercharging the engine is

    • Options
    • A. to reduce mass ofthe engine per brake power
    • B. to reduce space occupied by the engine
    • C. to increase the power output of an engine when greater power is required
    • D. all ofthe above
      • Discuss

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