Engineering :: Thermodynamics

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301.

In adiabatic compression the decrease in volume is associated with

A.	increase in temperature and increase in pressure	B.	increase in temperature and decrease in pressure
C.	decrease in temperature and decrease in pressure	D.	decrease in temperature and increase in pressure

302.

The dimensions of 'a' will be

A.	ML2T	B.	ML3T-2
C.	ML5T-2	D.	ML6T-2

303.

The energy required to heat 1 gm of water from 0?F to 0?C will be nearly

A.	zero	B.	32 cal
C.	32 J	D.	74.6 J

304.

A carnot cycle engine operating between temperature range of 50?C and 100?C will have the efficiency of nearly

A.	50%	B.	40%
C.	26.80%	D.	13.40%

305.

A constant volume gas thermometer closely follows:

A.	Boyle's law	B.	Charle's law
C.	Gay Lussac's law	D.	None of the above

306.

Two vessels of volume 5 litres and 3 litres contain air at a pressure of 3 atmospheres and 5 atmospheres respectively. When the two vessels are connected together by a small tube (at constant temperature) the reusltant pressure will be

A.	3.75 atm	B.	4.0 atm
C.	4.5 atm	D.	5.0 atm

307.

Which of the following is a path function quantity?

A.	Enthalpy	B.	Temperature
C.	Work done	D.	Pressure

308.

During adiabatic expansion which of the following remains constant:

A.	Internal energy	B.	Temperature
C.	Entropy	D.	None of the above

309.

Kelvin's law deals with

A.	conservation of heat	B.	conservation of work
C.	conversion of heat into work	D.	conversion of work into heat

310.

The process in which the change in internal energy of a gas is equal to the work done is known as

A.	isochoric process	B.	isobaric process
C.	isothermal process	D.	adiabatic process