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MCQs

Total Questions : 347 | Page 7 of 35 pages
Question 61. A diesel engine has
  1.    one valve
  2.    two valves
  3.    three valves
  4.    four valves
 Discuss Question
Answer: Option C. -> three valves
Answer: (c).three valves
Question 62. The self ignition temperature of petrol is __________ as compared to diesel oil.
  1.    same
  2.    lower
  3.    higher
  4.    None of these
 Discuss Question
Answer: Option C. -> higher
Answer: (c).higher
Question 63. The increase of cooling water temperature in petrol engine will __________ the knocking tendency.
  1.    not effect
  2.    decrease
  3.    increase
  4.    None of these
 Discuss Question
Answer: Option C. -> increase
Answer: (c).increase
Question 64. The pressure inside the cylinder is __________ the atmospheric pressure during the exhaust stroke.
  1.    equal to
  2.    below
  3.    above
  4.    None of these
 Discuss Question
Answer: Option C. -> above
Answer: (c).above
Question 65. A carburettor is used to supply
  1.    petrol, air and lubricating oil
  2.    air and diesel
  3.    petrol and lubricating oil
  4.    petrol and air
 Discuss Question
Answer: Option D. -> petrol and air
Answer: (d).petrol and air
Question 66. The detonating tendency in petrol engines increases with increase of compression ratio.
  1.    True
  2.    False
  3.    Can't say
  4.    None of these
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 67. Each fission of U235 produces on the average __________ fast neutrons as a product of reaction.
  1.    2.46
  2.    24.6
  3.    246
  4.    2460
 Discuss Question
Answer: Option A. -> 2.46
Answer: (a).2.46
Question 68. The primary fuel used in nuclear power plants is
  1.    U235
  2.    U238
  3.    Pu239
  4.    Pu233
 Discuss Question
Answer: Option A. -> U235
Answer: (a).U235
Question 69. In petrol engine, using a fixed octane rating fuel and fixed compression ratio, supercharging will __________ the knocking tendency.
  1.    not effect
  2.    decrease
  3.    increase
  4.    None of these
 Discuss Question
Answer: Option C. -> increase
Answer: (c).increase
Question 70. Reactors for propulsion applications are designed for
  1.    any form of uranium
  2.    natura uranium
  3.    enriched uranium
  4.    plutonium
 Discuss Question
Answer: Option C. -> enriched uranium
Answer: (c).enriched uranium

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