323. For reversible adiabatic process, change in entropy is
A.Maximum
B.Minimum
C.Zero
D.Unpredictable
324. Isochoric process is one in which
A.Free expansion takes place
B.Very little mechanical work is done by the system
C.No mechanical work is done by the system
D.All parameters remain constant
325. When a gas flows through a very long pipe of uniform cross section, the flow is approximately
A.Isentropic
B.Isobaric
C.Isothermal
D.Adiabatic
326. The work done in the expansion of a gas from volume V1 to V2 under constant pressure p is equal to
A.Zero
B.P (V2 - V1)
C.P (V2 + V 1)
D.P/ (V2- V1)
327. An expansion process as per law pV = constant is known as
A.Parabolic expansion
B.Hyperbolic expansion
C.isentropics expansion
D.Adiabatic expansion
328. Under ideal conditions, isothermal, isobaric, isochoric and adiabatic processes are
A.Static processes
B.Dynamic processes
C.Quasi-static processes
D.Stable processes
329. Which of the following parameters remains constant during ideal throttling process
A.Pressure
B.Enthalpy
C.Volume
D.Entropy
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