Engineering :: Thermodynamics

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31.

The characteristic equation of gases pv = nRT holds good for

A.	Monoatomic gases	B.	Diatomic gases
C.	Real gases	D.	Ideal gases
E.	Mixture of gases

32.

A gas which obeys kinetic theory perfectly is known as

A.	Monoatomic gas	B.	Diatomic gas
C.	Real gas	D.	Pure gas
E.	Perfect gas

33.

If during a process, the entropy of the isolated system increases, the process is

A.	Adiabatic	B.	Isothermal
C.	Ideal	D.	Reversible
E.	Irreversible

34.

The statement that the entropy of a pure substance in complete theromodynamic equilibrium becomes zero at the absolute zero of temperature is known as

A.	Law of entropy	B.	Zeroth law of thermodynamics
C.	First law of thermodynamics	D.	Second law of thermodynamics
E.	Third law of thermodynamics

35.

Work done in a free expansion process is

A.	Zero	B.	Minimum
C.	Maximum	D.	Positive
E.	Negative

36.

Which of the following is not a property of the system

A.	Temperature	B.	Pressure
C.	Specific volume	D.	Heat
E.	None of the above

37.

The statement that molecular weight of all gases occupy the same volume at NTP is known as

A.	Dalton's law	B.	Avogadro's hypothesis
C.	First law of thermodynamics	D.	Joule's law
E.	Charle's law

38.

For diatomic gas flowing through a nozzle the critical pressure ratio is given by

A.	1	B.	0.528
C.	0.546	D.	0.577
E.	0.75

39.

In the polytropic process equation pvn = constant, if the value of n is infinitely large the process is termed as

A.	Constant volume	B.	Constant pressure
C.	Constant temperature	D.	Adiabatic
E.	Isothermal

40.

In the polytropic process equation pvn Constant, if n = 0 the process is termed as

A.	Constant volume	B.	Constant pressure
C.	Constant temperature	D.	Adiabatic
E.	Isothermal