Engineering :: Thermodynamics

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11.

A control volume refers to

A.	fixed region is space	B.	a difinite mass
C.	a closed system	D.	an isolated system

12.

A system in which there may exchange energy but not mass is known as

A.	open system	B.	closed system
C.	isolated system	D.	insulated system

13.

An open system implies

A.	the use of a control volume	B.	no interchange between system and surroundings
C.	the presence of free surface	D.	that a definite mass of material is considered

14.

A system is called open system if

A.	only the energy crosses the system boundary	B.	both energy and mass cross the system boundary
C.	neither energy nor mass crosses the system boundary	D.	only the mass crosses the system boundary

15.

A system is said to be an isolated system if

A.	only the mass crosses the system boundary	B.	only the energy crosses the system boundary
C.	both energy and mass crosses the system boundary	D.	neither energy nor mass crosses the system boundary

16.

Which of the following is an example of a closed system

A.	Scooter engine	B.	Liquid cooling system of an automobile
C.	Boiler in steam power plant	D.	Air compressor

17.

You turn off the water flowing into the tube and open the drain. This is an example of

A.	an open steady-state system	B.	an open unsteady-state system
C.	a closed system	D.	none of the above

18.

Select the wrong statement

A.	Both heat and work cross the boundary of the system	B.	Both heat and work are path functions
C.	Both heat and work are property of the system	D.	Heat flows when the system and surroundings are not in equilibrium which is not necessary for work

19.

In a reversible shaft work process

A.	the temperature forces are balanced	B.	the pressure forces are balanced
C.	the mechanical forces are balanced	D.	all the forces are balanced

20.

Intensive properties are the properties whose magnitude

A.	depends on the quantity of material involved	B.	does not depend on the quantity of material involved
C.	depends on the path followed	D.	none of the above