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Internal Combustion Engines

Internal Combustion Engines
A spark plug gap is kept from

0.3 to 0.7 mm
0.4 to 0.9 mm
0.6 to 1.0 mm
0.2 to 0.8 mm

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Internal Combustion Engines
The ratio of the brake power to the indicated power is called

Mechanical efficiency
Overall efficiency
Volumetric efficiency
Indicated thermal efficiency

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

Diesel engine
4-stroke petrol engine
Steam turbine
2-stroke petrol engine

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Internal Combustion Engines
If V₁ is the jet velocity and V₀ is the vehicle velocity, then propulsive efficiency of a turbojet engine is

V₁ / (V₀ + V₁)
V₀ / (V₀ + V₁)
2V₁ / (V₀ + V₁)
2V₀ / (V₀ + V₁)

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Internal Combustion Engines
In the opposed piston diesel engine, the combustion chamber is located

Between the pistons
There is no such criterion
Below the piston
Above the piston

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Internal Combustion Engines
In compression ignition engines, swirl denotes a

Haphazard motion of the gases in the chamber
Rotary motion of the gases in the chamber
None of the listed here
Radial motion of the gases in the chamber

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