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

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

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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

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

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Internal Combustion Engines
The fuel valve in a four stroke cycle diesel engine

May open and close anywhere
Opens at 15° after top dead center and closes at 20° before bottom dead center
Opens at top dead center and closes at bottom dead center
Opens at 15° before top dead center and closes at 20° after top dead center

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Internal Combustion Engines
For the same compression ratio

Diesel cycle is more efficient than Otto
Otto cycle is more efficient than the Diesel
Both Otto and Diesel cycles are, equally efficient
Compression ratio has nothing to do with efficiency

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Internal Combustion Engines
In a four stroke cycle petrol engine, the inlet valve

Opens at 20° after top dead center and closes at 20° before bottom dead center
Opens at 20° before top dead center and closes at 40° after bottom dead center
Opens at top dead center and closes at bottom dead center
May open or close anywhere

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