After cooler is used to
A.Cool the air
B.Reduce the volume of air
C.To cause moisture and oil vapour to drop out
D.Remove impurities from air
E.None of the above
Category: Heat Engines Mcqs
In compression ignition engines swirl is
A.Circular motion imparted to gases after combustion
B.Circular motion imparted to suction air
C.Radial motion imparted to fuel air mixture
D.Directional movement of fuel spray
E.None of the above
In order to achieve maximum possible fuel economy the design features which will be affected are
A.Volumetric efficiency
B.Compression ratio
C.Method of charging
D.Atomization
E.None of the above
Which one of the following is a safety device on a compressor?
A.Relief valve
B.Strainer
C.Over pressure shut down
D.Over speed shut down
E.Intercooler relief valve
Sensible heat is
A.That heat which causes change of state
B.That heat which produces a rise of temperature
C.That heat which produces a rise of temperature
D.That can only be sensed by a thermometer
E.None of the above
Baffles are provided on engines to
A.Improve heat transfers rate
B.Improve engine performance
C.Reduce fuel consumption
D.Assist in starting the engine
E.Guard against dirt and dust
In automobiles as the speed of vehicle increases the back pressure
A.Increases
B.Reduces
C.Remains unaffected
D.Depends on other factors
E.None of the above
Anti-knock for compression ignition engines is
A.Amyl nitrate
B.Tetra ethyl lead
C.Trimethyl pentane
D.Hexadecane
E.Aromatics
Solubility of a gas in a liquid at small concentration is represented in
A.Henry’s law
B.Clausius Clapeyron equation
C.Raoult’s law
D.Dalton’s law
E.None of the above
Coking is
A.Formation of lumps or masses of coke in boiler furnaces at high temperatures
B.Heating of coal in absence of air driving carbon and leaving behind the residue of carbon
C.Burning of coal in a furnace
D.Producing lumps of coal from fine powders with the help of a binder
E.None of the above
