Internal Combustion Engines
Pick up the wrong statement about supercharging

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

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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

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

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