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Internal Combustion Engines

Internal Combustion Engines
The effective inhibitor of pre-ignition is

Lead
None of these
Alcohol
Water

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

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

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Internal Combustion Engines
The knocking in spark ignition engines can be reduced by

Retarding the spark
Both (A) and (B)
None of these
Increasing the engine speed

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Internal Combustion Engines
The scavenging efficiency of a four stroke cycle diesel engine is

Between 50 and 85%
Between 85 and 95%
Below 50%
Between 95 and 100%

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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
Iso-octane and normal hexane
Normal octane and aniline
Normal heptane and iso-octane

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Internal Combustion Engines
A flow in which the quantity of liquid flowing per second is constant, is called __________ flow.

Streamline
Unsteady
Turbulent
Steady

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