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
Category: Heat Engines Mcqs
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
Which of the following is a false statement. A multicylinder diesel engine is missing on one or more cylinders. The cause may be
A.Valve sticky
B.Valves leaky
C.Compression poor
D.Insufficient fuel supply to cylinders
E.Air cleaner plugged
Which one of the following assumptions is not involved while deriving relation for air standard efficiency of Otto cycle?
A.The working fluid is air for which the specific heats are constant
B.There is no chemical reaction inside the engine clinder
C.Expansion and compression are adiabatic
D.There is always thermal and chemical equilibrium
E.The engine operates at mederate rpm
For same compression ratio and same heat input
A.Otto cycle is more efficient
B.Diesel cycle is more efficient
C.Both are equally efficient
