What happens when you heat china having some dark paintings engraved on it at 1000°C and then examine it in a dark room immediately?

The whole china dish will be bright

The dark painting will appear much brighter

The whole china dish will be bright

The china dish will develop patterns

Thermal conductivity analyzers cannot be used in which of the following measurements?

Hydrogen in blast furnace gases

Determination of argon in oxygen in the process of air decomposition

Sulphur dioxide in roasting gases in production of sulphuric acid

Oxygen from a mixture of oxygen and nitrogen

Which of the following bridges are used in thermal conductivity analyzers?

Kelvin‚Äö√Ñ√∂‚àö√ë‚àö¬•s bridge

Anderson‚Äö√Ñ√∂‚àö√ë‚àö¬•s bridge

Schering‚Äö√Ñ√∂‚àö√ë‚àö¬•s bridge

What happens when you heat a china having some dark paintings engraved on it at 1000¬¨¬®‚Äö√†√ªC and then examine it in a dark room immediately?$

The whole china dish will be bright

The dark painting will appear much brighter

The whole china dish will be bright

The china dish doesn‚Äö√Ñ√∂‚àö√ë‚àö¬•t glow

The china dish will develop patterns

How can the high speed of response be obtained in thermal conductivity analyzers?

By reducing the temperature of gas surrounding the filaments

By increasing the pressure of gas surrounding the filaments

By reducing the pressure of gas surrounding the filaments

By reducing the temperature of gas surrounding the filaments

By increasing the temperature of gas surrounding the filaments

The outer ends of two bars A and B are at 100¬¨¬®‚Äö√†√ªC and 50¬¨¬®‚Äö√†√ª respectively. Calculate the temperature at the welded joint if they have the same cross-section and the same length and their thermal conductivities are in the ratio of A:B = 7:5$

80.548¬¨¬®‚Äö√†√ªC

79.166¬¨¬®‚Äö√†√ªC

80.548¬¨¬®‚Äö√†√ªC

20.157¬¨¬®‚Äö√†√ªC

58.147¬¨¬®‚Äö√†√ªC

Which of the following is not the characteristic of thermistors used in thermal conductivity analyzers?

High negative temperature coefficient of resistance

Why locations next to large water bodies tend to have a moderate climate than those further inland?

Because of the heating effects of sun

Because of specific heat of water

Because of the heating effects of sun

In which of the following conditions can thermal conductivity analyzer be used for multi-component mixtures?

When all components have very different thermal conductivities except two of them which are the same

When all the components have same thermal conductivities

When all the components have very different thermal conductivities

When all but one component have same thermal conductivities

When all components have very different thermal conductivities except two of them which are the same

31 + Mcqs in Thermal Conductivity in Engineering Physics Page 1 McqOptions

1.	Which of the following is an effective coolant?
A.	Oil
B.	Mercury
C.	Water
D.	Acids
Answer» D. Acids

Discussion

2.	The temperature of a body can be negative on the Kelvin scale.
A.	True
B.	False
Answer» C.

Discussion

3.	Two thermometers are constructed in the same way except that one has a spherical bulb and the other an elongated cylindrical bulb. Which of the two will respond quickly to temperature changes?
A.	Spherical bulb
B.	Elongated cylindrical bulb
C.	All of the mentioned
D.	None of the mentioned
Answer» B. Elongated cylindrical bulb

Discussion

4.	A green glass heated in a furnace when taken out in dark glows red.
A.	False
B.	True
Answer» C.

Discussion

5.	What happens when you heat china having some dark paintings engraved on it at 1000°C and then examine it in a dark room immediately?
A.	The dark painting will appear much brighter
B.	The whole china dish will be bright
C.	The china dish doesn’t glow
D.	The china dish will develop patterns
Answer» B. The whole china dish will be bright

Discussion

6.	The outer ends of two bars A and B are at 100°C and 50° respectively. Calculate the temperature at the welded joint if they have the same cross-section and the same length and their thermal conductivities are in the ratio of A:B = 7:5.
A.	79.166°C
B.	80.548°C
C.	20.157°C
D.	58.147°C
Answer» B. 80.548°C

Discussion

7.	When one end of the rod is heated, the molecules at the hot end vibrate with higher amplitude and transmit the heat from one particle to the adjacent particle and so on. What is the process?
A.	Convection
B.	Conduction
C.	Radiation
D.	Transmittance
Answer» C. Radiation

Discussion

8.	Changes in the composition of gas stream give rise to changes in thermal conductivity of the gas stream.
A.	True
B.	False
Answer» B. False

Discussion

9.	Which of the following is generally used as indicators in bridges in thermal conductivity analyzers?
A.	Voltmeter
B.	Ammeter
C.	Galvanometer
D.	Wattmeter
Answer» D. Wattmeter

Discussion

10.	Thermal conductivity analyzers cannot be used in which of the following measurements?
A.	Hydrogen in blast furnace gases
B.	Determination of argon in oxygen in the process of air decomposition
C.	Sulphur dioxide in roasting gases in production of sulphuric acid
D.	Oxygen from a mixture of oxygen and nitrogen
Answer» E.

Discussion

11.	CHANGES_IN_THE_COMPOSITION_OF_GAS_STREAM_GIVE_RISE_TO_CHANGES_IN_THERMAL_CONDUCTIVITY_OF_THE_GAS_STREAM.?$
A.	True
B.	False
Answer» B. False

Discussion

12.	TWO_THERMOMETERS_ARE_CONSTRUCTED_IN_THE_SAME_WAY_EXCEPT_THAT_ONE_HAS_A_SPHERICAL_BULB_AND_THE_OTHER_AN_ELONGATED_CYLINDRICAL_BULB._WHICH_OF_THE_TWO_WILL_RESPOND_QUICKLY_TO_TEMPERATURE_CHANGES??$
A.	Spherical bulb
B.	Elongated cylindrical bulb
C.	All of the mentioned
D.	None of the mentioned
Answer» B. Elongated cylindrical bulb

Discussion

13.	Which of the following is an effective coolant?$
A.	Oil
B.	Mercury
C.	Water
D.	Acids
Answer» D. Acids

Discussion

14.	The temperature of a body can be negative on the Kelvin scale.$
A.	True
B.	False
Answer» C.

Discussion

15.	Which of the following is generally used as indicators in bridges in thermal conductivity analyzers?
A.	Voltmeter
B.	Ammeter
C.	Galvanometer
D.	Wattmeter
Answer» D. Wattmeter

Discussion

16.	A green glass heated in a furnace when taken out in dark glows red?
A.	False
B.	True
Answer» C.

Discussion

17.	Which of the following bridges are used in thermal conductivity analyzers?
A.	Wheatstone bridge
B.	Kelvin‚Äö√Ñ√∂‚àö√ë‚àö¬•s bridge
C.	Anderson‚Äö√Ñ√∂‚àö√ë‚àö¬•s bridge
D.	Schering‚Äö√Ñ√∂‚àö√ë‚àö¬•s bridge
Answer» B. Kelvin‚Äö√Ñ√∂‚àö√ë‚àö¬•s bridge

Discussion

18.	What happens when you heat a china having some dark paintings engraved on it at 1000¬¨¬®‚Äö√†√ªC and then examine it in a dark room immediately?$
A.	The dark painting will appear much brighter
B.	The whole china dish will be bright
C.	The china dish doesn‚Äö√Ñ√∂‚àö√ë‚àö¬•t glow
D.	The china dish will develop patterns
Answer» B. The whole china dish will be bright

Discussion

19.	How can the high speed of response be obtained in thermal conductivity analyzers?
A.	By increasing the pressure of gas surrounding the filaments
B.	By reducing the pressure of gas surrounding the filaments
C.	By reducing the temperature of gas surrounding the filaments
D.	By increasing the temperature of gas surrounding the filaments
Answer» C. By reducing the temperature of gas surrounding the filaments

Discussion

20.	The outer ends of two bars A and B are at 100¬¨¬®‚Äö√†√ªC and 50¬¨¬®‚Äö√†√ª respectively. Calculate the temperature at the welded joint if they have the same cross-section and the same length and their thermal conductivities are in the ratio of A:B = 7:5$
A.	79.166¬¨¬®‚Äö√†√ªC
B.	80.548¬¨¬®‚Äö√†√ªC
C.	20.157¬¨¬®‚Äö√†√ªC
D.	58.147¬¨¬®‚Äö√†√ªC
Answer» B. 80.548¬¨¬®‚Äö√†√ªC

Discussion

21.	Which of the following is not the characteristic of thermistors used in thermal conductivity analyzers?
A.	High negative temperature coefficient of resistance
B.	Slow response
C.	Extremely sensitive
D.	Low cost
Answer» C. Extremely sensitive

Discussion

22.	Why locations next to large water bodies tend to have a moderate climate than those further inland?
A.	Because of the latitude
B.	Because of specific heat of water
C.	Because of the heating effects of sun
D.	Because of the water in clouds
Answer» C. Because of the heating effects of sun

Discussion

23.	Thermistors have positive temperature-coefficient of resistance.
A.	True
B.	False
Answer» C.

Discussion

24.	What happens when a material is heated?
A.	It contracts
B.	It melts
C.	It expands
D.	It bursts
Answer» D. It bursts

Discussion

25.	Which of the following materials are generally not used for the construction of filaments in thermal conductivity analyzers?
A.	Tungsten
B.	Gold
C.	Platinum
D.	Kovar
Answer» C. Platinum

Discussion

26.	Why is the roof of buildings painted white?
A.	Because it absorbs radiation
B.	Because it reflects radiations
C.	Because it is cheaper
D.	Because it conducts heat
Answer» C. Because it is cheaper

Discussion

27.	Which among the following elements has the highest thermal conductivity?
A.	Nitrogen
B.	Oxygen
C.	Hydrogen
D.	Chlorine
Answer» D. Chlorine

Discussion

28.	When potassium is added to water, it is seen that the lower region becomes warm first and becomes less dense. It then moves up and the more dense cold water comes down and the process goes on. What is the process taking place?
A.	Radiation
B.	Conduction
C.	Convection
D.	Purification
Answer» D. Purification

Discussion

29.	In which of the following conditions can thermal conductivity analyzer be used for multi-component mixtures?
A.	When all the components have same thermal conductivities
B.	When all the components have very different thermal conductivities
C.	When all but one component have same thermal conductivities
D.	When all components have very different thermal conductivities except two of them which are the same
Answer» D. When all components have very different thermal conductivities except two of them which are the same

Discussion

30.	Solids with weekly bonded electrons are good conductors of heat.
A.	True
B.	False
Answer» B. False

Discussion

31.	When one end of the rod is heated, the molecules at the hot end vibrate with higher amplitude and transmit the heat from one particle to the adjacent particle and so on. What is the process?
A.	Convection
B.	Conduction
C.	Radiation
D.	Transmittance
Answer» C. Radiation

Discussion

Explore topic-wise MCQs in Engineering Physics.

Which of the following is an effective coolant?

The temperature of a body can be negative on the Kelvin scale.

Two thermometers are constructed in the same way except that one has a spherical bulb and the other an elongated cylindrical bulb. Which of the two will respond quickly to temperature changes?

A green glass heated in a furnace when taken out in dark glows red.

What happens when you heat china having some dark paintings engraved on it at 1000°C and then examine it in a dark room immediately?

The outer ends of two bars A and B are at 100°C and 50° respectively. Calculate the temperature at the welded joint if they have the same cross-section and the same length and their thermal conductivities are in the ratio of A:B = 7:5.

When one end of the rod is heated, the molecules at the hot end vibrate with higher amplitude and transmit the heat from one particle to the adjacent particle and so on. What is the process?

Changes in the composition of gas stream give rise to changes in thermal conductivity of the gas stream.

Which of the following is generally used as indicators in bridges in thermal conductivity analyzers?

Thermal conductivity analyzers cannot be used in which of the following measurements?

CHANGES_IN_THE_COMPOSITION_OF_GAS_STREAM_GIVE_RISE_TO_CHANGES_IN_THERMAL_CONDUCTIVITY_OF_THE_GAS_STREAM.?$

TWO_THERMOMETERS_ARE_CONSTRUCTED_IN_THE_SAME_WAY_EXCEPT_THAT_ONE_HAS_A_SPHERICAL_BULB_AND_THE_OTHER_AN_ELONGATED_CYLINDRICAL_BULB._WHICH_OF_THE_TWO_WILL_RESPOND_QUICKLY_TO_TEMPERATURE_CHANGES??$

Which of the following is an effective coolant?$

The temperature of a body can be negative on the Kelvin scale.$

Which of the following is generally used as indicators in bridges in thermal conductivity analyzers?

A green glass heated in a furnace when taken out in dark glows red?

Which of the following bridges are used in thermal conductivity analyzers?

What happens when you heat a china having some dark paintings engraved on it at 1000¬¨¬®‚Äö√†√ªC and then examine it in a dark room immediately?$

How can the high speed of response be obtained in thermal conductivity analyzers?

The outer ends of two bars A and B are at 100¬¨¬®‚Äö√†√ªC and 50¬¨¬®‚Äö√†√ª respectively. Calculate the temperature at the welded joint if they have the same cross-section and the same length and their thermal conductivities are in the ratio of A:B = 7:5$

Which of the following is not the characteristic of thermistors used in thermal conductivity analyzers?

Why locations next to large water bodies tend to have a moderate climate than those further inland?

Thermistors have positive temperature-coefficient of resistance.

What happens when a material is heated?

Which of the following materials are generally not used for the construction of filaments in thermal conductivity analyzers?

Why is the roof of buildings painted white?

Which among the following elements has the highest thermal conductivity?

When potassium is added to water, it is seen that the lower region becomes warm first and becomes less dense. It then moves up and the more dense cold water comes down and the process goes on. What is the process taking place?

In which of the following conditions can thermal conductivity analyzer be used for multi-component mixtures?

Solids with weekly bonded electrons are good conductors of heat.

When one end of the rod is heated, the molecules at the hot end vibrate with higher amplitude and transmit the heat from one particle to the adjacent particle and so on. What is the process?