386. One barometric pressure or 1 atmospheric pressure is equal to

A.1 kgf/cm

B.1.033 kgf/cm2

C.0 kgf/cm2

D.1.0197 kgf/cm2

387. The value of 1 bar in S.I. units is equal to

A.1 N/m2

B.1 N.m2

C.1 X 10^4 N/m2

D. 1 x 10^5 N/m2

388. A perfect gas at 27°C was heated until its volume was doubled. The temperature of the gas will now be

A.270°C

B.540°C

C.327°C

D.729°C

389. Change in the internal energy of small temperature change ΔT for ideal gas is expressed by the relation

A.ΔU = Cv x ΔT

B.ΔU = Cp x ΔT

C.ΔU = (Cp + Cv) ΔT

D.ΔU = (Cp - Cv) ΔT

390. Change in enthalpy for small temperature change T for ideal gas is expressed by the relation

A.ΔH = Cv x ΔT

B.AH = Cp x ΔT

C.All = Cp/Cv x ΔT

D.ΔN = (Cp - Cv) ΔT

391. The ratio of actual cycle efficiency to that of the ideal cycle efficiency is called

A.Effectiveness

B.Work ratio

C.Efficiency ratio

D.Isentropic efficiency

392. The constant volume cycle is also called

A.Carnot cycle

B.Joule cycle

C.Diesel cycle

D.Otto cycle

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