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Mechanical Engineering Objective Questions { Thermodynamics }



491. The area under a curve on T-s diagram represents
A.Heat transfer
B.Enthalpy transfer
C.Heat transfer during reversible process
D.Heat transfer during irreversible process
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492. Submerged combustion involves
A.Combustion inside the liquid medium
B.Combustion of liquid fuels
C.Combustion of liquid fuel under inert gases
D.Invisible combustion
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493. All the commercial liquid fuels are derived from
A.Coal
B.Crude oil
C.Gasoline
D.Fuel oil
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494. Specific fuel consumption is defined as
A.Fuel consumption per hour
B.Fuel consumed per km
C.Fuel consumed per BHP
D.Fuel consumed per hour per BHP
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495. Flameless combustion means
A.Inert gas combustion
B.Invisible combustion
C.Catalytic combustion
D.Combustion in vacuum
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496. A cycle consisting of one constant pressure, one constant volume and two isentropic processes is known as
A.Carnot cycle
B.Stirling cycle
C.Otto cycle
D.Diesel cycle
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497. The efficiency and work ratio of a simple gas turbine cycle are
A.low
B.very low
C.high
D.very high
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