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MCQs

Total Questions : 1124 | Page 11 of 113 pages
Question 101. If the speed of the engine is increased, the indicated power will
  1.    Increase
  2.    Decrease
  3.    Remain same
  4.    None of these
 Discuss Question
Answer: Option A. -> Increase
Question 102. The ratio of indicated thermal efficiency to the corresponding air standard cycle efficiency is called
  1.    Net efficiency
  2.    Efficiency ratio
  3.    Relative efficiency
  4.    Overall efficiency
 Discuss Question
Answer: Option C. -> Relative efficiency
Question 103. The ratio of the indicated thermal efficiency to the air standard efficiency is known as
  1.    Mechanical efficiency
  2.    Overall efficiency
  3.    Volumetric efficiency
  4.    Relative efficiency
 Discuss Question
Answer: Option D. -> Relative efficiency
Question 104. Installation of supercharger on a four cycle diesel engine can result in the following percentage increase in power
  1.    Up to 35%
  2.    Up to 50%
  3.    Up to 75%
  4.    Up to 100%
 Discuss Question
Answer: Option D. -> Up to 100%
Question 105. Volatility of diesel fuel oil is
  1.    Minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame
  2.    Temperature at which it solidifies or congeals
  3.    It catches fire without external aid
  4.    Indicated by 90% distillation temperature, i.e., when 90% of sample oil has distilled off
 Discuss Question
Answer: Option D. -> Indicated by 90% distillation temperature, i.e., when 90% of sample oil has distilled off
Question 106. In an internal combustion engine, the process of removing the burnt gases from the combustion chamber of the engine cylinder is known as
  1.    Scavenging
  2.    Detonation
  3.    Supercharging
  4.    Polymerisation
 Discuss Question
Answer: Option A. -> Scavenging
Question 107. The operation of forcing additional air under pressure into the engine cylinder is known as
  1.    Supercharging
  2.    Carburetion
  3.    Turbulence
  4.    Delay period
 Discuss Question
Answer: Option A. -> Supercharging
Question 108. The operation of forcing additional air under pressure in the engine cylinder is known as
  1.    Scavenging
  2.    Turbulence
  3.    Supercharging
  4.    Pre-ignition
 Discuss Question
Answer: Option C. -> Supercharging
Question 109. An engine indicator is used to determine the following
  1.    Speed
  2.    Temperature
  3.    Volume of cylinder
  4.    m.e.p. and I.H.P.
 Discuss Question
Answer: Option D. -> m.e.p. and I.H.P.
Question 110. The knock in diesel engine occurs due to
  1.    Instantaneous and rapid burning of the first part of the charge
  2.    Instantaneous auto ignition of last part of charge
  3.    Delayed burning of the first part of the charge
  4.    Reduction of delay period
 Discuss Question
Answer: Option A. -> Instantaneous and rapid burning of the first part of the charge

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