Car Repairman Question:
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The turbulence in diesel engines ensures to
a. Increase the volumetric efficiency
b. Increase the compression ratio
c. Bring the fuel quickly in contact with the air
d. Increase the specific fuel consumption

Answer:

c. Bring the fuel quickly in contact with the air

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A negative loop in the P.V diagram of an I.C engine is due to
a. Pre ignition in the engine
b. Suction of air for engine
c. Pre opening of the exhaust valve
d. High pressure in the cylinder
The temperature of the compressed air should be ………….. of the fuel
a. Below the flash point
b. Above the flash point
c. Above the fire point
d. Between the fire and flash point