Internal Combustion Engines
Which one of the following event would reduce volumetric efficiency of a vertical compression ignition engine?

Inlet valve closing after bottom dead center
Inlet valve opening before top dead center
Exhaust valve closing after top dead center
Inlet valve closing before bottom dead center

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Internal Combustion Engines
In a coil ignition system of petrol engines, a condenser is connected across the contact breaker in order to

None of these
Prevent sparking across the gap between the points
Cause more rapid break of the primary current, giving a higher voltage in the secondary circuit
Both (A) and (B)

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Internal Combustion Engines
The injector nozzle of a compression ignition engine is required to inject fuel at a sufficiently high pressure in order to

Ensure that penetration is not high
All of these
Inject fuel in a chamber of high pressure at the end of compression stroke
Inject fuel at a high velocity to facilitate atomization

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Internal Combustion Engines
Pick up the wrong statement about supercharging

Supercharging at high altitudes is essential
Supercharging results in fuel economy
Supercharging reduces knocking in diesel engines
There can be limited supercharging in petrol engines because of detonation

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