The difference between two specific heats of a gas is equal to universal gas constant
A.When 1 gm of gas is heated
B.When 1 molecule of gas is heated
C.When 1 gm molecule heated
D.When 1 gm molecule heated
E.When any amount of gas is heated
Category: Thermodynamics Mcqs
Maxwell’s thermodynamic relations are valid for
A.Closed system only
B.All processes
C.Only reversible processes
D.A thermodynamic system in equilibrium
E.Transient conditions only
In an isothermal expansion of gases
A.Temperature is lowered
B.Temperature is raised
C.Temperature is unaltered
D.Temperature becomes zero
E.Temperature shows the extent of expansion
Draught ensures supply of
A.Feed water
B.Air for combustion
C.Superheated steam
D.Coad to the boiler
In the polytropic process pvn = Constant if n = 1 the process is termed as
A.Constant volume
B.Constant pressure
C.Constant temperature
D.Adiabatic
E.Isothermal
The efficiency of an ideal (Carnot engine) depends on
A.Working substance
B.On the temperature of the source only
C.On the temperature of the sink only
D.On the temperature of both the source and the sink
E.On the construction of engine
Which of the following is a reversible process?
A.Free expansion
B.Throttling
C.Combustion
D.Diffusion
E.Extension and compression of a spring
When a gas is to be stored, the type of compression that would be ideal is
A.Isothermal
B.Adiabatic
C.Polytropic
D.Constant volume
E.None of the above
A substance above critical temperature exists as
A.Solid
B.Liquid
C.Dry vapour
D.Wet vapour
E.Gas
During an adiabatic process the change in entropy is
A.Positive
B.Negative
C.Zero
D.Positive or Negative
E.Approximately zero
