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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

Low temperature
Low density
Long ignition delay
All of these

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Internal Combustion Engines
Installation of supercharger on a four cycle diesel engine can result in the following percentage increase in power

Up to 100%
Up to 35%
Up to 50%
Up to 75%

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Internal Combustion Engines
If the temperature of intake air in internal combustion engine increases, then its efficiency will

Remain same
None of the listed here
Decrease
Increase

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Internal Combustion Engines
The thermal efficiency of a standard Otto cycle for a compression ratio of 5.5 will be

0.25
1
0.5
0.7

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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

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

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Internal Combustion Engines
In an internal combustion engine, the process of removing the burnt gases from the combustion chamber of the engine cylinder is known as

Detonation
Polymerisation
Scavenging
Supercharging

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MORE MCQ ON Internal Combustion Engines

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