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Internal Combustion Engines

Internal Combustion Engines
In petrol engine, using a fixed octane rating fuel and fixed compression ratio, supercharging will _________ the knocking tendency.

Increase
Decrease
None of these
Not effected

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Internal Combustion Engines
The Cipoletti weir is a __________ weir.

Rectangular
Trapezoidal
Circular
Triangular

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

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Internal Combustion Engines
A mixture containing 65% of iso-octane and 35% of normal heptane will have

Cetane number 65
Octane number 65
Octane number 35
Cetane number 35

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Internal Combustion Engines
The output of a diesel engine can be increased without increasing the engine revolution or size in following way

Feeding more fuel
Supercharging
Heating incoming air
Scavenging

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Internal Combustion Engines
In order to eliminate knocking in compression ignition engines, there should be

Late auto-ignition
Low compression ratio
High self ignition temperature of fuel
Short delay period

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MORE MCQ ON Internal Combustion Engines

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