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Internal Combustion Engines

Internal Combustion Engines
In diesel engine the diesel fuel injected into cylinder would burn instantly at about compressed air temperature of

250°C
1000°C
500°C
2000°C

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Internal Combustion Engines
The reflectivity depends upon

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

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

Supercharger
Centrifugal pump
Natural aspirator
Movement of engine piston

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

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Internal Combustion Engines
The thermal efficiency of a diesel cycle having fixed compression ratio, with increase in cut-off ratio will

Decrease
Increase
Be independent
May increase or decrease depending on other factors

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Internal Combustion Engines
The reference fuels for knock rating of spark ignition engines would include

Iso-octane and normal hexane
Iso-octane and alpha-methyl naphthalene
Normal heptane and iso-octane
Normal octane and aniline

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MORE MCQ ON Internal Combustion Engines

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