In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have

Internal Combustion Engines
In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have

Low density

All of these

Long ignition delay

Low temperature

Low density

All of these

Long ignition delay

Low temperature

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Internal Combustion Engines
Compression ratio of I.C. Engines is

Ratio of pressure after compression and before compression

Swept volume/cylinder volume

Volume displaced by piston per stroke and clearance volume in cylinder

The ratio of volumes of air in cylinder before compression stroke and after compression stroke

Ratio of pressure after compression and before compression

Swept volume/cylinder volume

Volume displaced by piston per stroke and clearance volume in cylinder

The ratio of volumes of air in cylinder before compression stroke and after compression stroke

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

Spark plug

Carburettor

Fuel injector

Ignition coil

Spark plug

Carburettor

Fuel injector

Ignition coil

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Internal Combustion Engines
Volatility of diesel fuel oil is

Temperature at which it solidifies or congeals

Minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame

It catches fire without external aid

Indicated by 90% distillation temperature, i.e., when 90% of sample oil has distilled off

Temperature at which it solidifies or congeals

Minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame

It catches fire without external aid

Indicated by 90% distillation temperature, i.e., when 90% of sample oil has distilled off

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Internal Combustion Engines
As a result of detonation in an I.C. engine, following parameter attains very high value

Rate of rise of pressure

Rate of rise of temperature

Peak pressure

Peak temperature

Rate of rise of pressure

Rate of rise of temperature

Peak pressure

Peak temperature

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Internal Combustion Engines
The higher combustion chamber wall temperature in compression ignition engines will _________ knocking tendency.

None of these

Increase

Reduce

Not effect

None of these

Increase

Reduce

Not effect

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Internal Combustion Engines

Internal Combustion Engines In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have

Internal Combustion Engines Compression ratio of I.C. Engines is

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

Internal Combustion Engines Volatility of diesel fuel oil is

Internal Combustion Engines As a result of detonation in an I.C. engine, following parameter attains very high value

Internal Combustion Engines The higher combustion chamber wall temperature in compression ignition engines will _________ knocking tendency.

Internal Combustion Engines
In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have

Internal Combustion Engines
Compression ratio of I.C. Engines is

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

Internal Combustion Engines
Volatility of diesel fuel oil is

Internal Combustion Engines
As a result of detonation in an I.C. engine, following parameter attains very high value

Internal Combustion Engines
The higher combustion chamber wall temperature in compression ignition engines will _________ knocking tendency.