Engineering :: Thermodynamics

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The unit of energy is the same as the unit of

A.	power	B.	work
C.	entropy	D.	pressure

The unit of power is

A.	W only	B.	J/s only
C.	J/s and W both	D.	J

One kWh is equal to

A.	3.6 x 108 J	B.	3.6 x 106 J
C.	3.6 x 107 J	D.	3.6 x 105 J

The unit of energy is

A.	J/s	B.	J
C.	W	D.	N

Pascal is the unit of pressure and one pascal is equal to

A.	1 N/m2	B.	105 N/m2
C.	133.32 N/m2	D.	104 N/m2

Torr is equal to the pressure of

A.	0.1 mm of Hg at 0?C in a standard gravitational field	B.	1 mm of Hg at 0?C in a standard gravitational field
C.	0.01 mm of Hg at 0?C in a standard gravitational field	D.	0.001 mm of Hg at 0?C in a standard gravitational field

Which of the following is / are thermometric property (ies)?

A.	Pressure of a gas kept at constant-volume	B.	Volume of a gas kept at constant-pressure
C.	Thermal emf of a thermocouple	D.	All of the above

First law of thermodynamics is based on the

A.	law of conservation of mass	B.	law of conservation of energy
C.	law of equipartion of energy	D.	law of conservation of momentum

For a closed system the correct mathematical expression for the first law of thermodynamics is

A.	dU = ?dQ + dW	B.	dU = dQ + dW
C.	dU = dQ-dW	D.	dU = Q + W

10.

The mathematical expression for the first law of thermodynamics for a steady-state flow processes is

A.	? H = Q + Ws	B.	?H = Q-Ws
C.	?U = Q-Ws	D.	?U = Q + Ws