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Internal Combustion Engines

Internal Combustion Engines
The thermal efficiency of a standard Otto cycle for a compression ratio of 5.5 will be

1
0.25
0.7
0.5

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Internal Combustion Engines
The knocking in diesel engines may be prevented by

Increasing the inlet pressure of air
Raising the compression ratio
All of these
Reducing the delay period

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Internal Combustion Engines
In order to mix air and petrol in the required proportion and to supply it to the engine during suction stroke, then ___ is employed.

Injector
Carburettor
Fuel pump
None of the listed here

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Internal Combustion Engines
Which of the following is not an intern’s combustion engine?

4-stroke petrol engine
Steam turbine
2-stroke petrol engine
Diesel engine

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

None of these
ηm = (B.P × I.P)/100
ηm = B.P/I.P
ηm = I.P/B.P

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Internal Combustion Engines
Alpha-methyl-naphthalene (C₁₁ H₁₀) has a cetane number of

120
0
100
50

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MORE MCQ ON Internal Combustion Engines

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