GK-Objective Questions- Physics-Heat for Rail/SSC

Dear Readers,We are presenting Physics Questions for upcoming  RRB /SSC Exams. We will more questions in forthcoming posts.

Sl No

Questions

Options

Ans.

1

SI unit of temperature is

A)Celsius

B)Fahrenheit

C)Kelvin

D)None of these

C

2

The SI unit of mechanical equivalent of heat in

A)Joules -calories

B)Joules /calories

C)Calories-ergs

D)ergs/calories

B

3

SI unit of heat is

A)calories

B)Joule

C)Kilo calories

D)Kelvin

B

4

The unit of latent heat is

A)cal-g

B)cal/˚c

C)cal/g

D)None of these

C

5

One Joule is approximately equal to

A).28 cal

B).32 cal

C).24 cal

D)None of these

C

6

The temperatures of the sun is measured with

A)Pyrometer

B)platinium  thermometer

C)gas thermometer

D)None of these

B

7

The temperatures of a gas is measured with

A)pyrometer

B)gas thermometer

C)vapour pressure thermometer

D)None of these

A

8

The instrument used to measure humidity is

A)anemometer

B)hygrometer

C)thermometer

D)None of these

B

9

Earliest thermometer was developed by

A)Kelvin

B)Fahrenheit

C)Galileo

D)None of these

C

10

Devise used to measure very high temperature is

A)pyrometer

B)gas thermometer

C)vapour pressure thermometer

D)None of these

A

11

The correct value of 0˚C on the Kevin scale is

A)273 k

B)27.315 k

C)270 k

D)None of these

B

12

A temperatures at which both the Fahrenheit and the centigrade scales having the same value is

A)-60˚

B)-40˚

C)-20˚

D)None of these

B

13

The absolute zero on Celsius scale is

A)-200˚C

B)-273˚C

C)-373.15˚C

D)None of these

B

14

Mercury thermometers can be used to measure temperature up to

A)50 K

B)60 K

C)70 k

D)None of these

A

15

The normal temperatures of human body is

A)37˚C

B)37˚F

C)104˚F

D)None of these

A

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16

Fahrenheit scale divides two fixed points into

A)180 parts

B)21 parts

C)100 parts

D)None of these

A

14

When an object is heated , the molecules of that object

A)began to move faster

B)lose energy

C)become heavier

D)None of these

A

18

If the temperature scale is changes from 0˚c to 0˚F the numerical value of specific heat will

A)increase

B)decrease

C)remain unchanged

D)None of these

B

19

When temperature is gradually decreased the specific heat of substance is

A)decreased

B)increased

C)remain unchanged

D)None of these

A

20

A solid metal ball has a spherical cavity .If the ball is heated, he volume of the cavity will

A)decreased

B)increased

C)remain unchanged

D)None of these

B

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21

A metal sheet with circular hole is heated. The hole will

A)contract

B)expand

C)remain unaffected

D)None of these

B

22

A gas is enclosed in a container which is then placed on a fast moving train .The temperature of the gas

A)rises

B)falls

C)remain unchanged

D)None of these

C

23

When water is heated from 0˚C to 10˚C , it s volume

A)decreases

B)increases

C)first decreases and then increases

D)None of these

C

24

If the temperature inside a room  is increased, the relative humidity will

A)increase

B)decrease

C)remain unchanged

D)None of these

B

25

With rise of boiling point of a water the latent heat of stream

A)increase

B)decrease

C)remain unchanged

D)None of these

B

26

A refrigerator, with its power on, is kept in closed room with its door open. The temperature of the room will

A)increase

B)decrease

C)remain unchanged

D)None of these

A

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27

A electric heater kept in vaccum, is heated continuously

A)will go on rising with time

B)will stop rising after some time

C)will become constant after some time because of loss of heat due to radiation

D)None of these

C

28

A fan produces a feeling of comfort during hot weather because

A)fan supplies cold air

B)our perspiration evaporates rapidly

C)Our body radiates more heat in air

D)None of these

B

29

When lake start breezing the formation of the ice will start first at the

A)bottom

B)middle

C)top

D)None of these

C

30

Glaciers always melt at the ….first

A)top surface

B)sides

C)bottom

D)None of these

C

31

Which of the following substances has greatest specific heat?

A)Iron

B)Water

C)Copper

D)None of these

B

32

Calorimeters are generally made of

A)copper

B)brass

C)aluminium

D)None of these

A

33

Which of the following is the best conductor of heat

A)copper

B)brass

C)aluminium

D)silver

B

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34

The best conductor of het among the following is

A)Alcohol

B)Mercury

C)Ether

D)None of these

B

35

A cooking pot should have

A)high specific heat & low connectivity

B)high specific heat & high connectivity

C)low specific heat & low connectivity

D)None of these

B

36

Heat is transmitted from higher to lower temperature through actual mass motion of the molecules in

A)conduction

B)convection

C)radiation

D)None of these

B

37

A thermo flask prevents heat loss by

A)radiation

B)conduction

C)convection

D)All of the above

D

38

Which is the fastest mode of heat loss ?

A)conduction

B)convection

C)radiation

D)None of these

B

39

Mode of transmission of heat in which heat carried by a moving particles is

A)conduction

B)convection

C)radiation

D)None of these

B

40

Transfer of heat energy from a heater coil to the cooking vessel takes place through the process of

A)convection only

B)conduction and convection only

C)radiation and convection only

D)None of these

C

41

Clear night are colder than cloudy night s because of

A)conduction

B)condensation

C)radiation

D)None of these

C

42

The mode of propagation of heat from the sun to the earth is

A)conduction  alone

B)convection alone

C)radiation alone

D)None of these

C

43

Air is blown over a hot body to cool it . This would increases the rate of heat loss by

A)conduction  alone

B)convection alone

C)radiation alone

D)None of these

B

44

Transfer of heat energy from the sun to the moon takes place by

A)conduction  alone

B)convection alone

C)radiation alone

D)None of these

C

45

Using which mode of heat transfer ,can heat travel through vacuum ?

A)conduction  alone

B)convection alone

C)radiation alone

D)None of these

C

46

A person standing before a furnace receives most of the heat by

A)conduction  alone

B)convection alone

C)radiation alone

D)None of these

C

47

Woollen clothes keep the body warm because

A)wool increases the temperature of the body

B)wool is the bad conductor of the heat so it does not heat to flow out of the body

C)wool absorbs radiant heat from outer objects

D)None of these

B

48

The process in which no heat enters or leaves the system is termed as

A)isochoric

B)isobaric

C)adiabatic

D)None of these

C

49

Water is usual as coolant in the radiator of a car engine because it

A)has low density

B)has high specific heat

C)has low boiling point

D)None of these

B

50

The water from a hand Pump is warm in winter because

A)Our body is cold in winter and water appears to be warm

B)the temperature inside the earth  is higher than the  atmospheric temperature

C)the pumping process causes friction which warms up the water

D)None of these

B

51

Night are cooler in the deserts than in the plains because

A)sand radiates heat more quickly than the earth

B)the sky remains clear most of the time

C)sand absorbs heat more quickly than the earth

D)None of these

A

52

Clothes keep us warm in winter because they

A)supply heat

B)do not radiate heat

C)prevent the heat of the body from escaping

D)None of these

D

53

Metal tea pots have wooden handles because

A)wood is bad conductor of heat

B)it prevents electric shock

C)its gives beauty to the pots

D)None of these

A

54

White clothes are cooler than black ones because they

A)absorbs all the light that reaches them

B)reflect all the light that reaches them

C)will not allow the light to penetrate

D)None of these

B

55

Water is used in hot water bags because

A)it is easily obtained

B)it is cheaper and  is not harmful

C)it has high specific heat

D)None of these

C

56

The temperature of water at the bottom of a waterfall is higher than that at the top because

A)water at the bottom has greater potential energy

B)the surface at the bottom provides heat

C)kinetic energy of falling water in converted into heat

D)None of these

C

57

The temperature of boiling water in a steam engine may be high because

A)there are dissolved substances in water

B)there is low pressure inside the boiler

C)there is high pressure inside the boiler

D)None of these

C

58

At absolute zero temperature , the kinetic energy of the molecules

A)becomes maximum

B)becomes minimum

C)remain constant

D)becomes zero

D

59

Freezing mixture is a mixture

A)which solidifies water

B)freezes at 0˚C

C)which produce’s very low temperature

D)None of these

C

60

The clouds float in the atmosphere because of their low

A)temperature

B)velocity

C)pressure

D)None of these

A

61

Which colour of heat radiation represents the highest temperature

A)blood red

B)dark chery

C)salmon

D)white

D

62

How can boiling point of a liquid be reduced

A)by adding a solid of lower melting point

B)by dissolving a soluble solid in it

C)by decreasing the pressure on the liquid

D)None of these

C

63

The temperature of a body is an indicator of

A)the total energy of the molecules of the body

B)the average energy of the molecules of the body

C)the average kinetic energy of the molecules of the body

D)None of these

C

64

A real gas can be liquefied by the application of pressure when its temperature is

A)above the room temperature

B)above the inversion temperature

C)at the critical temperature

D)None of these

C

65

A gas thermometer is more sensitive than a liquid thermometer because a gas

A)is lighter than liquid

B)expands more than a liquid

C)does not change state easily

D)None of these

B

66

The speed of light with the rise in the temperature of the medium

A)increases

B)decreases

C)remains unaltered

D)None of these

C

67

When pressure on piece of ice is increased its melting point

A)increases

B)decreases

C)remains unaltered

D)None of these

A

68

Paraffin wax contracts on solidification . The melting point of wax will be

A)not change with pressure

B)decreases with pressure

C)increase with pressure

D)None of these

69

The energy that can harness heat stored below the earth’s surface is known as

A)thermal energy

B)nuclear energy

C)geo thermal energy

D)None of these

C

70

At upper atmosphere, an astronaut feels

A)extremely hot

B)extremely cool

C)slightly hotter

D)None of these

B

71

Thermodynamics mostly deals with

A)Conversion of heat into other forms of energy

B)transfer of heat

C)Change of state

D)None of these

A

 

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