Related Questions

If the temperature of intake air in internal combustion engine increases, then its efficiency will
A Remain same
B Decrease
C Increase
D None of these
When the air is passed through an insulated chamber having sprays of water maintained at a temperature higher than the dew point temperature of entering air but lower than its dry bulb temperature, then the air is said to be
A Cooled and humidified
B Cooled and dehumidified
C Heated and humidified
D Heated and dehumidified
Supercharging is the process of supplying the intake air to the engine cylinder at a density _________ the density of the surrounding atmosphere.
A Equal to
B Less than
C Greater than
D None of these
The process of supplying the intake air to the engine cylinder at a pressure greater than the pressure of the surrounding atmosphere is known as
A Supercharging
B Auto ignition
C Scavenging
D Detonation
The increase in intake temperature of internal combustion engines will _________ efficiency.
A Have no effect on
B Increase
C Decrease
D None of these
Air intake for an air compressor should be preferably taken from
A A site, where cooling towers are located nearby
B A site, where open coal yard in located nearby
C An air conditioned room maintained at a temperature of 18°C
D An outside atmosphere at 10°C
When water is sprayed on air, passing through an insulated chamber maintained at a temperature higher than the dew point of entering air but lower than its dry bulb temperature, then the air is
A Cooled and dehumified
B Heated and humidified
C Cooled and humidified
D Heated and dehumidified
In a four speed four stroke Diesel engine, the intake valve
A Opens at T.D.C. and closes at B.D.C.
B Opens at 20° before T.D.C. and closes at 35° after B.D.C.
C Opens at 10° after T.D.and closes at 20° before B.D.C.
D None of the above
The capacity of compressor will be highest when its intake temperature is
A Lowest
B Highest
C Anything
D Atmospheric
If the compression ratio in I.C. engine increases, then its thermal efficiency will
A Decrease
B Increase
C Remain same
D None of these

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