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Internal Combustion Engines

Internal Combustion Engines
Combustion in compression ignition engines is

Heterogeneous
Both (A) and (B)
Homogeneous
Laminar

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Internal Combustion Engines
Which of the following is false statement?Excess quantities of sulphur in diesel fuel are Objectionable because it may cause the following

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

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Internal Combustion Engines
A stoichiometric air-fuel ratio is

Lean mixture
Rich mixture for over loads
Rich mixture for idling
Chemically correct mixture

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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
Above
None of these
Equal to

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Internal Combustion Engines
Stoichiometric ratio is

Actual air-fuel ratio for maximum efficiency
None of these
Chemically correct air-fuel ratio by weight
Chemically correct air-fuel ratio by volume

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Internal Combustion Engines
The effective inhibitor of pre-ignition is

Water
Alcohol
Lead
None of these

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