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Internal Combustion Engines

Internal Combustion Engines
In the crankcase method of scavenging, the air pressure is produced by

Supercharger
Natural aspirator
Centrifugal pump
Movement of engine piston

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Internal Combustion Engines
Fuel oil consumption guarantees for I .C. engine are usually based on

Calorific value of fuel
High heat value of oil
Low heat value of oil
Net calorific value of oil

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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/(V₀ + V₁)
[2(V₀/V₁)]/ [1 + (V₀/V₁)²]
(V₀/V₁)/ [1 + (V₀/V₁)²]
V₁/(V₀ + V₁)

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Internal Combustion Engines
Supercharging is essential in

Gas turbines
Petrol engines
Aircraft engines
Diesel engines

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Internal Combustion Engines
A higher compression ratio causes

Acceleration in the rate of combustion
Increase in detonation
Any one of these
Pre-ignition

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Internal Combustion Engines
The reflectivity depends upon

Energy of neutrons
Geometry of the reflector
Properties of the reflector
All of these

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