36

39.

40

42.

43

I'he work done on a reversed heat engine is 80 kJ and the heat transfer to the engine from the low

temperatu servoir is 200 kJ. The C.O.P as a hcat pump is
(Ay 2 (8) 2.5

L) 35 (D) 4

An isentiopic process is always

(A) ersible and adiabatic (B) reversible and isothermal
(€) frictionless and irreversible (D) irreversible and adiabatic

In the polytrophic process equation py" = constant, if n is infinitely large, the process is termed as
(ക) constant volume (8) consiant pressure
(C) constant temperature (D) adiabatic

Helmholtz function is expressed as

(९) (u-Ts) (छ) (h-Ts)
(C) டவ வற்‌) (D) (utpv)
I'he efficiency of an ideal Carnot engine depends on

(കു working substance
(8) on the temperature of the source only
(€) on temperature of the sink only

(D) on the temperatures of both the sink and source only

If the thermal efficiency of

Camot heat engine is 40 percent, then coeflicient of performance of

frigerator working within the same temperature limits would be
(4) 15 (छ) 25
೧) 3.5 (೧) 4.5

Under what condition the ehange in the enthalpy of a system equals heat supplied 2

(A) Constant volume (9) Constant pressure

(C) Constant temperature (D) Standard t

perature and pressure condition

A tank of 1 m deep is in free tall under gravity with negligible drag. The pressure at the bottom of

the tank if atmosphe

c pressurc is 101 kPa

കര 8 (8) 101 kPa
(೧) 1.01 kPa (D) 10.1 ۵
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