309. Strictly speaking all engineering processes are
A.Quasi-static
B.Thermodynamically in equilibrium
C.Reversible
D.Irreversible

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310. In a free expansion process
A.Work done is zero
B.Heat transfer is zero
C.Both (A) and (B)
D.above

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311. If a gas vapour is allowed to expand through a very minute aperture, then such a process is known as
A.Free expansion
B.Hyperbolic expansion
C.Adiabatic expansion
D.Parabolic expansion

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312. The specific heat of air increases with increase in
A.Temperature
B.Pressure
C.Both pressure and temperature
D.Variation of its constituents

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313. If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called
A.Free expansion
B.Hyperbolic expansion
C.Adiabatic expansion
D.Parabolic expansion

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314. Which of the following property remains constant during throttling process
A.Internal energy
B.Pressure
C.Entropy
D.Enthalpy

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315. Which of the following processes are thermodynamically reversible
A.Throttling
B.Isothermal and adiabatic
C.Constant volume and constant pressure
D.Hyperbolic and PV^n = C

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