323. For reversible adiabatic process, change in entropy is
A.Maximum
B.Minimum
C.Zero
D.Unpredictable

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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

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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

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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)

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327. An expansion process as per law pV = constant is known as
A.Parabolic expansion
B.Hyperbolic expansion
C.isentropics expansion
D.Adiabatic expansion

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328. Under ideal conditions, isothermal, isobaric, isochoric and adiabatic processes are
A.Static processes
B.Dynamic processes
C.Quasi-static processes
D.Stable processes

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329. Which of the following parameters remains constant during ideal throttling process
A.Pressure
B.Enthalpy
C.Volume
D.Entropy

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