Heat Engines MCQs | Page - 2

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Mr. Dubey • 89.66K Points
Coach

Q. Which one of the following symptoms will not show that combustion is becessary complete.

  • (A) Presence of free carbon in exhaust
  • (B) Presence of carbon monoxide in exhaust
  • (C) Presence of oxygen in exhaust
  • (D) Presence of nitrogen in exhaust
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M

Mr. Dubey • 89.66K Points
Coach

Q. Presence of impurities in ice

  • (A) Does not have any effect
  • (B) Lowers melting point
  • (C) Makes it heavier than water
  • (D) Raises melting point
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M

Mr. Dubey • 89.66K Points
Coach

Q. Piston rod is provided in

  • (A) Slow speed steam engines
  • (B) Double acting steam engines
  • (C) High speed steam engines
  • (D) Non-condensing steam engines
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M

Mr. Dubey • 89.66K Points
Coach

Q. The pressure of steam generated in a boiler as recorded by the Bourdon pressure gauge was 2.2 kg/sq-cm. If the barometer reads 774 mm of mercury the absolute pressure of steam would be

  • (A) 0.2 kg/sq-cm
  • (B) 9.774 kg/sq-cm
  • (C) 1.025 kg/sq-cm
  • (D) 3.2526 kg/sq-cm
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M

Mr. Dubey • 89.66K Points
Coach

Q. Which statement is false in case of SI engines

  • (A) Accetylene has least tendency to knocking
  • (B) Adding methyl groups to the side of the carbon chain increases the knocking tendency
  • (C) Unsaturated aliphatic hydrocarbons show less knocking tendency
  • (D) Increasing the length of the carbon chain increases the knocking tendency
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M

Mr. Dubey • 89.66K Points
Coach

Q. In a petrol engine as the speed increases

  • (A) The spark intensity has to be increased
  • (B) The spark intensity has to be reduced
  • (C) The spark has to be advanced
  • (D) The spark has to be retarded
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M

Mr. Dubey • 89.66K Points
Coach

Q. In thermodynamics, forced processes are those

  • (A) Where a difference is observed in any microscopic property of the system between different times of states
  • (B) Where a difference is observed in any microscopic property of the system between different times or states
  • (C) Which occur in the direction of an intensive property or driving force contained within the system
  • (D) Which require an agency outside the system to force the process
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M

Mr. Dubey • 89.66K Points
Coach

Q. The steam in a boiler drum is always

  • (A) Dry and saturated
  • (B) Wet or dry and saturated
  • (C) Dry
  • (D) Wet
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M

Mr. Dubey • 89.66K Points
Coach

Q. Which of the following is false statement? The cause of slow cranking of a gas engine during starting may be

  • (A) Partially discharged battery
  • (B) Under capacity battery
  • (C) High air temperature
  • (D) Heavy engine oil
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M

Mr. Dubey • 89.66K Points
Coach

Q. The work done on a compressor will be least when air is taken from

  • (A) As and where available
  • (B) Source of low temperature air
  • (C) A source at 0?C
  • (D) Atmosphere
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