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Internal Combustion Engines

Internal Combustion Engines
The loud pulsating noise heard within the cylinder of an internal combustion engine is known as

Detonation
Turbulence
Pre-ignition
Supercharging

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

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

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Internal Combustion Engines
In petrol engines, the delay period is of the order of

0.004 second
0.002 second
0.003 second
0.001 second

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Internal Combustion Engines
Stoichiometric ratio is

Actual air-fuel ratio for maximum efficiency
Chemically correct air-fuel ratio by volume
None of these
Chemically correct air-fuel ratio by weight

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Internal Combustion Engines
The air-fuel ratio in petrol engines is controlled by

Controlling valve opening/closing
Carburetion
Governing
Injection

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Internal Combustion Engines
The ignition quality of diesel oil is expressed by

None of the listed here
Octane number
Calorific value
Cetane number

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MORE MCQ ON Internal Combustion Engines

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