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IC Engines and Nuclear Power Plants problems

  • 1. Morse test can be conducted for

  • Options
  • A. petrol engines
  • B. diesel engines
  • C. multi-cylinder engines
  • D. all of these
    • Discuss
  • 2. The thermal efficiency of diesel engines is about

  • Options
  • A. 15%
  • B. 30%
  • C. 50%
  • D. 70%
    • Discuss
  • 3. 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
  • 4. U233 is produced

  • Options
  • A. artificially
  • B. as basic raw material
  • C. when thorium is irradiated by neutrons
  • D. by fission of U238
    • Discuss
  • 5. 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
  • 6. The primary fuel used in nuclear power plants is

  • Options
  • A. U235
  • B. U238
  • C. Pu239
  • D. Pu233
    • Discuss
  • 7. The increase of cooling water temperature in petrol engine will __________ the knocking tendency.

  • Options
  • A. not effect
  • B. decrease
  • C. increase
    • Discuss
  • 8. The detonation is also called knocking or pinking.

  • Options
  • A. Yes
  • B. No
    • Discuss
  • 9. 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
  • 10. 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

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