Heat Engines MCQs | Page - 2

Dear candidates you will find MCQ questions of Heat Engines here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

M

Mr. Dubey • 52.52K 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 • 52.52K 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 • 52.52K 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 • 52.52K 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 • 52.52K 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 • 52.52K 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 • 52.52K 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 • 52.52K 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 • 52.52K 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 • 52.52K 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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