Internal Combustion Engines
In order to mix air and petrol in the required proportion and to supply it to the engine during suction stroke, then ___ is employed.

Carburettor
Injector
Fuel pump
None of the listed here

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Internal Combustion Engines
In a typical medium speed 4-stroke cycle diesel engine the inlet valve

May open or close anywhere
Opens at top dead center and closes at bottom dead center
Opens at 10° after top dead center and closes 20° before the bottom dead center
Opens at 20° before top dead center and closes at 35° after the bottom dead center

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

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

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