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Internal Combustion Engines

Internal Combustion Engines
Alpha-methyl-naphthalene (C₁₁ H₁₀) has a cetane number of

120
0
100
50

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Internal Combustion Engines
Which of the following fuel detonates readily?

Iso-octane
Benzene
Alcohol
Normal heptane

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

0.15
0.7
0.3
0.5

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Internal Combustion Engines
Which of the following does not relate to a spark ignition engine?

Ignition coil
Carburettor
Spark plug
Fuel injector

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

Is stronger
Wear is less
Absorbs shocks
Is lighter

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Internal Combustion Engines
A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of

75% diesel and 25% petrol
75% petrol and 25% diesel
75% normal heptane and 25% iso-octane
75% iso-octane and 25% normal heptane

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