The energy required to heat 1 gm of water from 0?F to 0?C will be nearly
A.zero
B.32 cal
C.32 J
D.74.6 J
Category: Thermodynamics Mcqs
Which of the following remains constant during an adiabatic process?
A.internal energy
B.enthalpy
C.entropy
D.All of the above
The value of the product of molecular weight and the gas characteristic constant for all gases in kgf m/1 kg mol ?K is
A.29.27
B.30
C.427
D.770
E.848
For a closed system, the difference between the heat added to the system and the work done by the system is equal to the change in
A.enthalpy
B.entropy
C.temperature
D.internal energy
On a Mollier chart the flow through turbine is represented by
A.Horizontal line
B.Vertical line
C.Curved line convex up
D.Carved line convex down
E.None of the above
The value of characteristic gas constant for carbon dioxide would be
A.29.2 kg/metre/kg/?K
B.30.4 kg/metre/kg/?K
C.19.28 kg/metre/kg/?K
D.16.1 kg/metre/kg/?K
E.10.0 kg/metre/kg/?K
The statement that the entropy of a pure substance in complete theromodynamic equilibrium becomes zero at the absolute zero of temperature is known as
A.Law of entropy
B.Zeroth law of thermodynamics
C.First law of thermodynamics
D.Second law of thermodynamics
E.Third law of thermodynamics
Heat is transferred from an insulated steam pipe to the surrounding still air by
A.Conduction
B.Free convection
C.Forced convection
D.Radiation
E.All the above together
In Porous plug experiment the change in temperature of a gas depends upon
A.its molecular weight
B.its specific heat
C.pressure gradient on either side
D.All of the above
