Engineering :: Thermodynamics

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111.

A system

A.	Is a specified region, not necessarily of constant volume, where transfer of energy and/or mass are to be studied	B.	Is a region of constant mass and only energy is allowed to cross the boundaries
C.	Cannot transfer either energy or mass to or from the surroundings	D.	Has a mass transfer across its boundaries and the mass within the system is not constant
E.	None of the above

112.

A system comprising a single phase is called a

113.

Which one of the following is heterogeneous system

A.	The cooling fluid in the radiator	B.	Atmospheric air
C.	Cooking gas in a cylinder	D.	A mixture of hydrogen and oxygen
E.	A mixture of ice, water and system.

114.

Identify the incorrect statement

A.	The temperature scale is independent of the properties of any substance	B.	The size of a unit of temperature, the degree, has a rational interpretation
C.	A region of coldest temperature, an absolute zero, is well defined	D.	All of the above
E.	None of the above

115.

The internal energy of an ideal gas is

A.	A function of temperature alone	B.	A function of pressure
C.	A function of volume	D.	(a) and (b) only
E.	All the above

116.

In an automobile the gear box is fitted between

117.

A fusible plug is utilised when

A.	Steam generation rate is high	B.	Water level is too low
C.	Water level is too high	D.	Impurities in water are excessive
E.	Firing rate is high

118.

A safety valve is used on boilers to

A.	Check the level of water	B.	Check the level of steam
C.	Check the temperature of steam	D.	To release excess pressure
E.	None of the above

119.

A choke is applied in a car

120.

The shape of the lid of manhole in a boiler is