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Internal Combustion Engines

Internal Combustion Engines
A diesel engine has compression ratio from

25 to 40
6 to 10
10 to 15
15 to 25

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Internal Combustion Engines
Diesel as compared to petrol is

Less difficult to ignite
None of these
More difficult to ignite
Highly ignitable

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Internal Combustion Engines
Supercharging is essential in

Gas turbines
Diesel engines
Aircraft engines
Petrol engines

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Internal Combustion Engines
The ignition quality of petrol is expressed by

Cetane number
All of these
Calorific value
Octane number

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Internal Combustion Engines
In a four stroke cycle petrol engine, the pressure inside the engine cylinder during the suction stroke is __________ the atmospheric pressure.

Below
None of these
Equal to
Above

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Internal Combustion Engines
Which of the following is false statement?

Piston ring and cylinder wear
Oil sludge in the engine crank case
Formation of hard coating on piston skirts
Detonation

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