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

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

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

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