During adiabatic expansion which of the following remains constant:
A.Internal energy
B.Temperature
C.Entropy
D.None of the above
Category: Thermodynamics Mcqs
As we go up in air the temperature of air decreases because
A.winds help in heat transfer by convection
B.oxygen content of air decreases sharply
C.of low pressure of air
D.heating effect due to infra red radiations from the surface of the earth is reduced
In which case the heat transferred from the air when compressed from 1.05 ata 15?C to 6.3 ata would be minimum?
A.Adiabatic
B.Isothermal
C.Polytropic pv1.3 = C
D.Polytropic pv1.31 = C
E.Polytropic pv1.35 = C
The function of a distributor is
A.To distribute power
B.To distribute fuel
C.To distribute spark
D.To time the spark
E.To generate the spark
Triple point
A.Occurs in sublimation
B.Occurs in a mixture of two or more gases
C.Is the range of temperature within which three constituents simultaneously change phase
D.Is that point where three phases solid, liquid and gas exist together
E.None of the above
The average pressure on the walls of a vessel will be doubled if the
A.average velocity of the molecules in it is doubled
B.the number of molecules in the vessel is doubled
C.the mass of each molecule is doubled
D.the mass of each molecule is halved
During the boiling of a liquid, which of the following parameter increases?
A.Temperature
B.Free energy
C.Entropy
D.Heat of vaporisation
E.None of the above
For water which of the following will be reduced to zero at critical pressure?
A.Specific volume
B.Enthalpy
C.Internal energy
D.Latent heat of vaporisation
E.None of the above
Which of the following gas will satisfy, Boyle’s law over a wider range of temperatures and pressures?
A.Oxygen
B.Hydrogen
C.Helium
D.Carbon monoxide
Planck’s law of radiation is applicable to
A.Radiation of any kind
B.Temperature radiation
C.Monochromatic radiation
D.Thermal radiation
E.None of the above
