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Internal Combustion Engines

Internal Combustion Engines
The calorific value of gaseous fuels is expressed in terms of

kcal
kcal/kg
kcal/m²
kcal/m3

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Internal Combustion Engines
If the speed of the engine is increased, the indicated power will

None of these
Remain same
Decrease
Increase

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

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Internal Combustion Engines
In a petrol engine, if diesel is used, then the engine will

Run at high speed
Explode
Not run
Run more efficiently

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

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

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

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

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