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Internal Combustion Engines

Internal Combustion Engines
The working pressure and temperature inside the cylinder of an internal combustion engine is _________ as compared to a steam engine.

Very high
Very low
Low
High

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Internal Combustion Engines
In a four stroke cycle, the minimum temperature inside the engine cylinder occurs at the

End of exhaust stroke
End of suction stroke
Beginning of exhaust stroke
Beginning of suction stroke

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

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

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Internal Combustion Engines
A diesel engine has

1 valve
3 valves
4 valves
2 valves

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Internal Combustion Engines
The scavenging efficiency of a four stroke cycle diesel engine is

Between 85 and 95%
Between 95 and 100%
Between 50 and 85%
Below 50%

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Internal Combustion Engines
A stoichiometric air-fuel ratio is

Chemically correct mixture
Rich mixture for idling
Rich mixture for over loads
Lean mixture

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MORE MCQ ON Internal Combustion Engines

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