Engineering :: Thermodynamics

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41.

For an ideal gas Charles law deals with the relationship between

A.	pressure and volume at constant temperature	B.	pressure and temperature at constant volume
C.	volume and temperature at constant pressure	D.	mass and volume at constant temperature

42.

Boyles law for an ideal gas deals with the relationship between

A.	mass and volume at constant temperature	B.	pressure and volume at constant temperature
C.	volume and temperature at constant pressure	D.	pressure and temperature at constant volume

43.

A gas is termed an ideal gas if it obeys the gas equation PV = RT. When do you expect a gas to show deviation from ideality?

A.	At high poressures and low temperatures	B.	At low poressures and low temperatures
C.	At high poressures and high temperatures	D.	At low poressures and high temperatures

44.

Under which of the following conditions is the law PV = RT obeyed most closely by a real gas?

A.	High pressure and high temperature	B.	Low pressure and low temperature
C.	High pressure and low temperature	D.	Low pressure and high temperature

45.

For an ideal gas x in the equation PV = xT is a constant which depands upon

A.	the number of molecules present only	B.	the type of gas only
C.	both (a) and (b)	D.	neighter (a) nor (b)

46.

Which of the following nethods will enable the volume of an ideal gas to be made four times greater? Use absolute temperature

A.	Double the temperature double the pressure	B.	Halve the temperature double the pressure
C.	Quarter the pressure at constant temperature	D.	Quarter the temperature at constant pressure

47.

To double the volume of a given mass of an ideal gas at 27?C keeping the pressure constant one must raise the temperature to

A.	54?C	B.	270?C
C.	327?C	D.	600?C

48.

Which one of the following plots for a gas at about room temperature will suggest an absolute zero temperature if extrapolated suitably?

A.	Pressure against 1/volume (temperature constant)	B.	Pressure against volume (temperature constant)
C.	Volume against temperature (pressure constant)	D.	Volume against 1/pressure (temperature constant)

49.

The volume of an ideal gas is 100 cm3 at 100?C. If the pressure is held constant at what temperature will the gas have a volume of 200 cm3?

A.	200?C	B.	473?C
C.	746?C	D.	50?C

50.

Specific volume of a gas is

A.	the reciprocal of its density	B.	equal to its density
C.	directly proportional to pressure	D.	the volume of gas at S.T.P.