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Internal Combustion Engines

Internal Combustion Engines
Combustion in compression ignition engines is

Homogeneous
Heterogeneous
Laminar
Both (A) and (B)

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Internal Combustion Engines
Pre-ignition is caused by the spontaneous combustion of the mixture before the end of the compression stroke, and is due to

Cylinder walls being too hot
Any one of the listed here
Red hot carbon deposits on cylinder walls
Overheated spark plug points

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Internal Combustion Engines
The compression ignition engines are governed by

Hit and miss governing
Qualitative governing
Quantitative governing
Combination of (B) and (C)

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Internal Combustion Engines
The normal heptane (C₇H₁₆) is given a rating of ________ octane number.

120
100
50

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Internal Combustion Engines
A diesel engine, during suction stroke, draws

A mixture of diesel and air
Air only
Diesel only
None of these

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Internal Combustion Engines
The knocking tendency in spark ignition engines may be decreased by

Controlling the exhaust temperature
Reducing the compression ratio
Controlling the air-fuel mixture
Controlling the ignition timing

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