Compression ratio of I.C. Engines is

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

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

Swept volume/cylinder volume

Ratio of pressure after compression and before compression

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

Swept volume/cylinder volume

Ratio of pressure after compression and before compression

Volume displaced by piston per stroke and clearance volume in cylinder

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Internal Combustion Engines
The knocking in diesel engines may be prevented by

All of these

Raising the compression ratio

Increasing the inlet pressure of air

Reducing the delay period

All of these

Raising the compression ratio

Increasing the inlet pressure of air

Reducing the delay period

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Internal Combustion Engines
In diesel engine, the compression ratio in comparison to expansion ratio is

Same

Less

More

Variable

Same

Less

More

Variable

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Internal Combustion Engines
If V₁ is the jet velocity and V₀ is the vehicle velocity, then the propulsive efficiency of a rocket is given by

(V₀/V₁)/ [1 + (V₀/V₁)²]

V₀/(V₀ + V₁)

V₁/(V₀ + V₁)

[2(V₀/V₁)]/ [1 + (V₀/V₁)²]

(V₀/V₁)/ [1 + (V₀/V₁)²]

V₀/(V₀ + V₁)

V₁/(V₀ + V₁)

[2(V₀/V₁)]/ [1 + (V₀/V₁)²]

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Internal Combustion Engines
Which of the following is not an intern’s combustion engine?

Steam turbine

4-stroke petrol engine

Diesel engine

2-stroke petrol engine

Steam turbine

4-stroke petrol engine

Diesel engine

2-stroke petrol engine

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Internal Combustion Engines
Pour point of fuel oil is the

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

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

Temperature at which it solidifies or congeals

It catches fire without external aid

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

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

Temperature at which it solidifies or congeals

It catches fire without external aid

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Internal Combustion Engines

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

Internal Combustion Engines The knocking in diesel engines may be prevented by

Internal Combustion Engines In diesel engine, the compression ratio in comparison to expansion ratio is

Internal Combustion Engines If V₁ is the jet velocity and V₀ is the vehicle velocity, then the propulsive efficiency of a rocket is given by

Internal Combustion Engines Which of the following is not an intern’s combustion engine?

Internal Combustion Engines Pour point of fuel oil is the

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

Internal Combustion Engines
The knocking in diesel engines may be prevented by

Internal Combustion Engines
In diesel engine, the compression ratio in comparison to expansion ratio is

Internal Combustion Engines
If V₁ is the jet velocity and V₀ is the vehicle velocity, then the propulsive efficiency of a rocket is given by

Internal Combustion Engines
Which of the following is not an intern’s combustion engine?

Internal Combustion Engines
Pour point of fuel oil is the