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Internal Combustion Engines

Internal Combustion Engines
The air standard efficiency of an Otto cycle compared to diesel cycle for the given compression ratio is

Less
More
Same
More or less depending on power rating

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Internal Combustion Engines
If the temperature of intake air in internal combustion engine increases, then its efficiency will

Increase
Remain same
None of the listed here
Decrease

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Internal Combustion Engines
If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the percentage increase in efficiency will be

0.14
0.08
0.02
0.04

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Internal Combustion Engines
The knocking in spark ignition engines can be reduced by

None of these
Retarding the spark
Both (A) and (B)
Increasing the engine speed

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Internal Combustion Engines
The mechanical efficiency (ηm) of the engine is given by

ηm = (B.P × I.P)/100
ηm = B.P/I.P
None of the listed here
ηm = I.P/B.P

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Internal Combustion Engines
The function of a distributor in a coil ignition system of I.C. engines is

To distribute current
To time the spark
To distribute spark
To distribute power

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MORE MCQ ON Internal Combustion Engines

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