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Internal Combustion Engines

Internal Combustion Engines
The thermal efficiency of petrol and gas engines is about

0.15
0.7
0.5
0.3

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

Low
High
Very low
Very high

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Internal Combustion Engines
Which of the following is false statement?

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

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Internal Combustion Engines
The maximum temperature in the I.C. engine cylinder is of the order of

2000-2500°C
1000-1500°C
500-1000°C
1500-2000°C

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Internal Combustion Engines
The reference fuels for knock rating of spark ignition engines would include

Iso-octane and alpha-methyl naphthalene
Normal octane and aniline
Normal heptane and iso-octane
Iso-octane and normal hexane

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Internal Combustion Engines
Engine pistons are usually made of aluminium alloy because it

Is stronger
Is lighter
Wear is less
Absorbs shocks

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MORE MCQ ON Internal Combustion Engines

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