Internal Combustion Engines (I.C. Engines) MCQs | Page - 1

Dear candidates you will find MCQ questions of Internal Combustion Engines (I.C. 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 • 52.26K Points
Coach 

Q. Scavenging air in diesel engine means

(A) air used for combustion sent under pres-sure
(B) forced air for cooling cylinder
(C) burnt air containing products of com-bastion
(D) air used for forcing burnt gases out of engine's cylinder during the exhaust period
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M

Mr. Dubey • 52.26K Points
Coach 

Q. Does the supply of scavenging air at a density greater than that of atmosphere mean engine is supercharged?

(A) yes
(B) no
(C) to some extent
(D) unpredictable
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M

Mr. Dubey • 52.26K Points
Coach 

Q. The ratio of indicated thermal efficiency to the corresponding air standard cycle efficiency is called

(A) net efficiency
(B) efficiency ratio
(C) relative efficiency
(D) overall efficiency
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M

Mr. Dubey • 52.26K Points
Coach 

Q. Compression ratio of LC. Engines is

(A) the ratio of volumes of air in cylinder before compression stroke and after compression stroke
(B) volume displaced by piston per stroke and clearance volume in cylinder
(C) ratio of pressure after compression and before compression
(D) swept volume/cylinder volume
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M

Mr. Dubey • 52.26K Points
Coach 

Q. A perfect engine works on the Carnot cycle between 727 °C and 227°C. The efficiency of the engine is

(A) 0.5
(B) 0.75
(C) 1
(D) 0.25
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M

Mr. Dubey • 52.26K Points
Coach 

Q. The air standard Otto cycle consists of

(A) two constant volume and two isentropic processes
(B) two constant pressure and two isentropic processes
(C) two constant pressure and two constant volume processes
(D) none of the above
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M

Mr. Dubey • 52.26K Points
Coach 

Q. In air standard Diesel cycle at fixed r and fixed n

(A) ƞthermal increases with increase in heat addition and cut-off ratio
(B) ƞthermal decreases with increase in heat addition and cut-off ratio
(C) ƞthermal Remains the same with increase in heat addition and cut-off ratio
(D) none of the above
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M

Mr. Dubey • 52.26K Points
Coach 

Q. Mean effective pressure of Otto cycle is

(A) inversely proportional to pressure ratio
(B) directly proportional to pressure ratio
(C) does not depend on pressure ratio
(D) proportional to square root of pressure ratio
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M

Mr. Dubey • 52.26K Points
Coach 

Q. For a given compression ratio the work output of Otto cycle is

(A) increases with Increase in r
(B) decreases with increase in r
(C) is not affected
(D) none of the above
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M

Mr. Dubey • 52.26K Points
Coach 

Q. For a given value of r, efficiency of Otto cycle

(A) decreases with compression ratio
(B) increases with compression ratio
(C) is not affected
(D) none of the above
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