38 + Mcqs in Heat and Thermodynamics in SRMJEEE Page 1 McqOptions

1.	The purpose of flywheel in the engines is
A.	to smooth out the energy variation
B.	to add more weight to engine to work it stable
C.	to start engine
D.	both (a) and (b)
Answer» B. to add more weight to engine to work it stable

Discussion

2.	The performance of a refrigerator is described by
A.	efficiency
B.	coefficient of performance
C.	both (a) and (b)
D.	not described
Answer» C. both (a) and (b)

Discussion

3.	For the successful operation of Heat engine which condition should be met.
A.	cyclic process
B.	operated at certain temperature difference
C.	both (a) and (b)
D.	none of these
Answer» D. none of these

Discussion

4.	In which process all the heat supplied is converted into work done.
A.	isothermal
B.	isochoric
C.	isobaric
D.	isentropic
Answer» B. isochoric

Discussion

5.	The work done in the isochoric process is
A.	constant
B.	variable
C.	zero
D.	depends on situation
Answer» D. depends on situation

Discussion

6.	Which quantity is a state function
A.	internal energy
B.	heat supply
C.	pressure
D.	volume
Answer» B. heat supply

Discussion

7.	Adiabatic process is also called
A.	Heat exchange process
B.	Heating process
C.	Isentropic process
D.	All of the above
Answer» D. All of the above

Discussion

8.	In which process entropy remains constant
A.	isobaric
B.	isochoric
C.	adiabatic
D.	isothermal
Answer» D. isothermal

Discussion

9.	Average translational kinetic energy per molecule of an ideal gas is given by
A.	3NaT/2R
B.	2NaT/3
C.	3RT/2Na
D.	3Na/2RT
Answer» D. 3Na/2RT

Discussion

10.	Boltzman constant K in terms of universal gas constant R and Avagadros number Na is give as
A.	K = RNa
B.	K = R/Na
C.	K = Na/Ra
D.	K = nRNa
Answer» C. K = Na/Ra

Discussion

11.	Which of the following properties of molecules of a gas is same for all gases at particular temperature?
A.	momentum
B.	mass
C.	velocity
D.	kinetic energy
Answer» E.

Discussion

12.	For a gas obeying Boyles law if the pressure is doubled the volume becomes
A.	double
B.	one half
C.	four times
D.	one fourth
Answer» C. four times

Discussion

13.	The area enclosed by the curve ABCDA for a Carnot heat engine represents the work done by Carnot engine
A.	at any instant
B.	averagely
C.	during its operation
D.	during one cycle
Answer» E.

Discussion

14.	The reading on the Fahrenheit scale will be double the reading on the centigrade scale when the temperature on the centigrade scale is
A.	460?C
B.	280?C
C.	360?C
D.	160?C
Answer» D. 160?C

Discussion

15.	Which one of correct relation ?
A.	Cp+Cv=?
B.	Cp=1+R/Cv
C.	?=Cp/Cv
D.	Cp=1-R/Cv
Answer» D. Cp=1-R/Cv

Discussion

16.	Gas molecules of different masses in the same container have the same average transnational kinetic energy which is directly proportional to their
A.	volume
B.	pressure
C.	absolute temperature
D.	time
Answer» D. time

Discussion

17.	Boyles law helds for ideal gases in
A.	isochoric processes
B.	isobaric processes
C.	isothermal processes
D.	adiabatic processes
Answer» D. adiabatic processes

Discussion

18.	If the pressure of a given gas is held constant its density is inversely proportional to its absolute temperature. We can refer it as another statement of
A.	Boyles law
B.	Charles law
C.	Ideal gas law
D.	Avagadros law
Answer» C. Ideal gas law

Discussion

19.	If the volume of a gas is held constant and we increase its temperature then
A.	its pressure is constant
B.	its pressure rises
C.	its pressure falls
D.	any of above
Answer» C. its pressure falls

Discussion

20.	Standard condition STP refer to a gas at
A.	76cm 0?C
B.	760mm 273K
C.	1atm 273K
D.	all of the above
Answer» E.

Discussion

21.	The pressure exerted by a column of mercury 76cm high and at 0?C is called
A.	1 atmosphere
B.	1 Newton per square meter
C.	1 Pascal
D.	data is insufficient
Answer» B. 1 Newton per square meter

Discussion

22.	Which one is not an example of adiabatic process ?
A.	rapid escape of air from a burst tyre
B.	rapid expansion of air
C.	conversion of water into ice in refrigerator
D.	cloud formation in the atmosphere
Answer» D. cloud formation in the atmosphere

Discussion

23.	Metabolism is the name of a process in which energy transformation takes place within
A.	Heat engine
B.	Human body
C.	Atmosphere
D.	Laboratory
Answer» C. Atmosphere

Discussion

24.	Which one is true for internal energy?
A.	It is sum of all forms of energies associated with molecules of a system
B.	It is a state function of a system
C.	It is proportional to transnational K.E of the molecules
D.	All are correct
Answer» E.

Discussion

25.	We can produce heat by
A.	Frictional process
B.	Chemical processes
C.	Electrical processes
D.	All of the above
Answer» E.

Discussion

26.	According to Pascals law the pressure of gas in a vessel is
A.	Different in different direction
B.	Same in all direction
C.	Same only along opposite directions
D.	Same only along normal directions
Answer» C. Same only along opposite directions

Discussion

27.	At constant temperature the graph between V and 1/P is
A.	Hyperbola
B.	Parabola
C.	A curve of any shape
D.	A straight lime
Answer» E.

Discussion

28.	The size of one degree of Celsius is equal to
A.	One degree of Fahrenheit scale
B.	1.8 degrees of Fahrenheit scale
C.	3.2 degrees of Fahrenheit scale
D.	2.12 degrees of Fahrenheit scale
Answer» C. 3.2 degrees of Fahrenheit scale

Discussion

29.	The Fahrenheit and centigrade scales agree to
A.	40
B.	15.5
C.	542
D.	273
Answer» B. 15.5

Discussion

30.	Normal human body temperature 98.6?F corresponds to
A.	37?C
B.	42?C
C.	55?C
D.	410?C
Answer» B. 42?C

Discussion

31.	In a clinical thermometer the mercury in the capillary tube does not contract once removed from the patient because
A.	Mercury takes a long time to contract
B.	The amount of mercury use is very small
C.	The capillary tube has a small constriction near the bulb
D.	The capillary tube is very narrow
Answer» D. The capillary tube is very narrow

Discussion

32.	Numerical value of Boltzmanns constant is
A.	1.38x10-31JK-1
B.	3.18x10-31JK-1
C.	3.18x10-23JK-1
D.	1.38x10-23JK-1
Answer» E.

Discussion

33.	The scales of temperature are based on two fixed points which are
A.	The temperatures of water at 0? 100?C
B.	The temperature of melting ice and boiling water at atmospheric pressure
C.	The temperatures of ice cold and boiling water
D.	The temperatures of frozen and boiling mercury
Answer» C. The temperatures of ice cold and boiling water

Discussion

34.	We prefer mercury as a thermometric substance because
A.	Over a wide range of temperature its expansion is uniform
B.	It does not stick to thermometer glass
C.	It opaque to light
D.	All of above
Answer» E.

Discussion

35.	Temperature is a property which determines
A.	How much heat a body contains
B.	Whether a body will feel hot or cold to touch
C.	In which direction heat will flow between two systems
D.	How much total absolute energy a body has
Answer» D. How much total absolute energy a body has

Discussion

36.	Dimension of pressure is
A.	MLT
B.	ML-1T-1
C.	ML-1T-2
D.	ML-2T-2
Answer» D. ML-2T-2

Discussion

37.	Which of the following is true for a closed system?
A.	mass entering = mass leaving
B.	mass does not enter or leave the system
C.	mass entering can be more or less than the mass leaving
D.	none of the mentioned
Answer» C. mass entering can be more or less than the mass leaving

Discussion

38.	Which of the following is true for a steady flow system?
A.	mass entering = mass leaving
B.	mass does not enter or leave the system
C.	mass entering can be more or less than the mass leaving
D.	none of the mentioned
Answer» B. mass does not enter or leave the system

Discussion

Explore topic-wise MCQs in SRMJEEE .

The&nbsp;purpose&nbsp;of&nbsp;flywheel&nbsp;in&nbsp;the&nbsp;engines&nbsp;is

The&nbsp;performance&nbsp;of&nbsp;a&nbsp;refrigerator&nbsp;is&nbsp;described&nbsp;by

For&nbsp;the&nbsp;successful&nbsp;operation&nbsp;of&nbsp;Heat&nbsp;engine&nbsp;which&nbsp;condition&nbsp;should&nbsp;be&nbsp;met.

&nbsp; In&nbsp;which&nbsp;process&nbsp;all&nbsp;the&nbsp;heat&nbsp;supplied&nbsp;is&nbsp;converted&nbsp;into&nbsp;work&nbsp;done.

The&nbsp;work&nbsp;done&nbsp;in&nbsp;the&nbsp;isochoric&nbsp;process&nbsp;is

Which&nbsp;quantity&nbsp;is&nbsp;a&nbsp;state&nbsp;function

Adiabatic&nbsp;process&nbsp;is&nbsp;also&nbsp;called

In&nbsp;which&nbsp;process&nbsp;entropy&nbsp;remains&nbsp;constant

Average&nbsp;translational&nbsp;kinetic&nbsp;energy&nbsp;per&nbsp;molecule&nbsp;of&nbsp;an&nbsp;ideal&nbsp;gas&nbsp;is&nbsp;given&nbsp;by

Boltzman&nbsp;constant&nbsp;K&nbsp;in&nbsp;terms&nbsp;of&nbsp;universal&nbsp;gas&nbsp;constant&nbsp;R&nbsp;and&nbsp;Avagadros&nbsp;number&nbsp;Na&nbsp;is&nbsp;give&nbsp;as

Which&nbsp;of&nbsp;the&nbsp;following&nbsp;properties&nbsp;of&nbsp;molecules&nbsp;of&nbsp;a&nbsp;gas&nbsp;is&nbsp;same&nbsp;for&nbsp;all&nbsp;gases&nbsp;at&nbsp;particular&nbsp;temperature?

&nbsp; For&nbsp;a&nbsp;gas&nbsp;obeying&nbsp;Boyles&nbsp;law&nbsp;if&nbsp;the&nbsp;pressure&nbsp;is&nbsp;doubled&nbsp;the&nbsp;volume&nbsp;becomes

&nbsp; The&nbsp;area&nbsp;enclosed&nbsp;by&nbsp;the&nbsp;curve&nbsp;ABCDA&nbsp;for&nbsp;a&nbsp;Carnot&nbsp;heat&nbsp;engine&nbsp;represents&nbsp;the&nbsp;work&nbsp;done&nbsp;by&nbsp;Carnot&nbsp;engine

The&nbsp;reading&nbsp;on&nbsp;the&nbsp;Fahrenheit&nbsp;scale&nbsp;will&nbsp;be&nbsp;double&nbsp;the&nbsp;reading&nbsp;on&nbsp;the&nbsp;centigrade&nbsp;scale&nbsp;when&nbsp;the&nbsp;temperature&nbsp;on&nbsp;the&nbsp;centigrade&nbsp;scale&nbsp;is

&nbsp; Which&nbsp;one&nbsp;of&nbsp;correct&nbsp;relation&nbsp;?

Gas&nbsp;molecules&nbsp;of&nbsp;different&nbsp;masses&nbsp;in&nbsp;the&nbsp;same&nbsp;container&nbsp;have&nbsp;the&nbsp;same&nbsp;average&nbsp;transnational&nbsp;kinetic&nbsp;energy&nbsp;which&nbsp;is&nbsp;directly&nbsp;proportional&nbsp;to&nbsp;their

Boyles&nbsp;law&nbsp;helds&nbsp;for&nbsp;ideal&nbsp;gases&nbsp;in

&nbsp; If&nbsp;the&nbsp;pressure&nbsp;of&nbsp;a&nbsp;given&nbsp;gas&nbsp;is&nbsp;held&nbsp;constant&nbsp;its&nbsp;density&nbsp;is&nbsp;inversely&nbsp;proportional&nbsp;to&nbsp;its&nbsp;absolute&nbsp;temperature.&nbsp;We&nbsp;can&nbsp;refer&nbsp;it&nbsp;as&nbsp;another&nbsp;statement&nbsp;of

&nbsp; If&nbsp;the&nbsp;volume&nbsp;of&nbsp;a&nbsp;gas&nbsp;is&nbsp;held&nbsp;constant&nbsp;and&nbsp;we&nbsp;increase&nbsp;its&nbsp;temperature&nbsp;then

&nbsp; Standard&nbsp;condition&nbsp;STP&nbsp;refer&nbsp;to&nbsp;a&nbsp;gas&nbsp;at

&nbsp; The&nbsp;pressure&nbsp;exerted&nbsp;by&nbsp;a&nbsp;column&nbsp;of&nbsp;mercury&nbsp;76cm&nbsp;high&nbsp;and&nbsp;at&nbsp;0?C&nbsp;is&nbsp;called

Which&nbsp;one&nbsp;is&nbsp;not&nbsp;an&nbsp;example&nbsp;of&nbsp;adiabatic&nbsp;process&nbsp;?

Metabolism&nbsp;is&nbsp;the&nbsp;name&nbsp;of&nbsp;a&nbsp;process&nbsp;in&nbsp;which&nbsp;energy&nbsp;transformation&nbsp;takes&nbsp;place&nbsp;within

&nbsp; Which&nbsp;one&nbsp;is&nbsp;true&nbsp;for&nbsp;internal&nbsp;energy?

We&nbsp;can&nbsp;produce&nbsp;heat&nbsp;by

According&nbsp;to&nbsp;Pascals&nbsp;law&nbsp;the&nbsp;pressure&nbsp;of&nbsp;gas&nbsp;in&nbsp;a&nbsp;vessel&nbsp;is

At&nbsp;constant&nbsp;temperature&nbsp;the&nbsp;graph&nbsp;between&nbsp;V&nbsp;and&nbsp;1/P&nbsp;is

The&nbsp;size&nbsp;of&nbsp;one&nbsp;degree&nbsp;of&nbsp;Celsius&nbsp;is&nbsp;equal&nbsp;to

The&nbsp;Fahrenheit&nbsp;and&nbsp;centigrade&nbsp;scales&nbsp;agree&nbsp;to

Normal&nbsp;human&nbsp;body&nbsp;temperature&nbsp;98.6?F&nbsp;corresponds&nbsp;to

In&nbsp;a&nbsp;clinical&nbsp;thermometer&nbsp;the&nbsp;mercury&nbsp;in&nbsp;the&nbsp;capillary&nbsp;tube&nbsp;does&nbsp;not&nbsp;contract&nbsp;once&nbsp;removed&nbsp;from&nbsp;the&nbsp;patient&nbsp;because

Numerical&nbsp;value&nbsp;of&nbsp;Boltzmanns&nbsp;constant&nbsp;is

The&nbsp;scales&nbsp;of&nbsp;temperature&nbsp;are&nbsp;based&nbsp;on&nbsp;two&nbsp;fixed&nbsp;points&nbsp;which&nbsp;are

We&nbsp;prefer&nbsp;mercury&nbsp;as&nbsp;a&nbsp;thermometric&nbsp;substance&nbsp;because

Temperature&nbsp;is&nbsp;a&nbsp;property&nbsp;which&nbsp;determines

Dimension&nbsp;of&nbsp;pressure&nbsp;is

&nbsp;Which&nbsp;of&nbsp;the&nbsp;following&nbsp;is&nbsp;true&nbsp;for&nbsp;a&nbsp;closed&nbsp;system?

&nbsp;Which&nbsp;of&nbsp;the&nbsp;following&nbsp;is&nbsp;true&nbsp;for&nbsp;a&nbsp;steady&nbsp;flow&nbsp;system?

The purpose of flywheel in the engines is

The performance of a refrigerator is described by

For the successful operation of Heat engine which condition should be met.

In which process all the heat supplied is converted into work done.

The work done in the isochoric process is

Which quantity is a state function

Adiabatic process is also called

In which process entropy remains constant

Average translational kinetic energy per molecule of an ideal gas is given by

Boltzman constant K in terms of universal gas constant R and Avagadros number Na is give as

Which of the following properties of molecules of a gas is same for all gases at particular temperature?

For a gas obeying Boyles law if the pressure is doubled the volume becomes

The area enclosed by the curve ABCDA for a Carnot heat engine represents the work done by Carnot engine

The reading on the Fahrenheit scale will be double the reading on the centigrade scale when the temperature on the centigrade scale is

Which one of correct relation ?

Gas molecules of different masses in the same container have the same average transnational kinetic energy which is directly proportional to their

Boyles law helds for ideal gases in

If the pressure of a given gas is held constant its density is inversely proportional to its absolute temperature. We can refer it as another statement of

If the volume of a gas is held constant and we increase its temperature then

Standard condition STP refer to a gas at

The pressure exerted by a column of mercury 76cm high and at 0?C is called

Which one is not an example of adiabatic process ?

Metabolism is the name of a process in which energy transformation takes place within

Which one is true for internal energy?

We can produce heat by

According to Pascals law the pressure of gas in a vessel is

At constant temperature the graph between V and 1/P is

The size of one degree of Celsius is equal to

The Fahrenheit and centigrade scales agree to

Normal human body temperature 98.6?F corresponds to

In a clinical thermometer the mercury in the capillary tube does not contract once removed from the patient because

Numerical value of Boltzmanns constant is

The scales of temperature are based on two fixed points which are

We prefer mercury as a thermometric substance because

Temperature is a property which determines

Dimension of pressure is

Which of the following is true for a closed system?

Which of the following is true for a steady flow system?