Heat Test

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Heat Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

The scale of temperature on which temperature is only positive is

A
Fahrenheit

B
Celsius

C
Kelvin

D
Reaumur

Solution

Kelvin scale has all positive readings.
Question 2
1 / -0

Mercury thermometers can be used to measure temperature up to

A
100° C

B
212°C

C
360°C

D
500°C

Solution

Mercury thermometers can be used to measure temperatures up to 360°C, exactly up to 357°C.
Question 3
1 / -0

Pyrometer is an instrument used to measure

A
high temperatures

B
low temperatures

C
specific heat

D
latent heat

Solution

Pyrometer is used to measure high temperatures.
Question 4
1 / -0

A metal plate has a circular hole cut in it. If the plate is heated to a higher temperature, the diameter of the hole will

A
remain unchanged

B
increase

C
decrease

D
increase or decrease depending upon its size

Solution

When a metal plate is heated, it will expand and hence, the circular hole inside it will also expand.
Question 5
1 / -0

Expansion during heating

A
occurs only in solids

B
increases the weight of a material

C
decreases the density of a material

D
occurs at the same rate for all

Solution

Expansion increases the volume for the same mass. Hence, mass per unit volume decreases and therefore, density decreases.
Question 6
1 / -0

A beaker is filled upto brim with water at 4°C. The temperature is increased by a few °C above 4°C and further, it is decreased by few °C below 4°C. What will we observe?

A
The level remains constant in each case.

B
In case I, water overflows while in II case, its level comes down.

C
In case II water overflows while in case in I, its level comes down.

D
Water overflows in both the cases.

Solution

Water has the maximum density at 4°C. Hence, if it is cooled or heated beyond that, its volume increases. Therefore, it expands and overflows.
Question 7
1 / -0

The high thermal conductivity of metal is due to free electrons. The related electron property is

A
it being charged

B
its high average energy

C
its high average thermal speed

D
its low volume

Solution

The high average thermal speed of electrons is responsible for the high thermal conductivity of metals.
Question 8
1 / -0

Ventilators are provided at the top of rooms

A
to bring oxygen for breathing

B
so that sunlight may enter the room

C
to maintain convection currents to keep the air fresh in the room

D
to provide an outlet for carbon dioxide

Solution

Ventilators are provided at the top to maintain convection currents to keep the air fresh in the room. This is because convection currents help in the circulation of air as the hot air rises and cold air takes its place at the bottom. Therefore, proper circulation takes place.

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Heat Test - 3

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Heat Test - 3

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Question 1

Fahrenheit

Celsius

Kelvin

Reaumur

Solution

Question 2

100° C

212°C

360°C

500°C

Solution

Question 3

high temperatures

low temperatures

specific heat

latent heat

Solution

Question 4

remain unchanged

increase

decrease

increase or decrease depending upon its size

Solution

Question 5

occurs only in solids

increases the weight of a material

decreases the density of a material

occurs at the same rate for all

Solution

Question 6

The level remains constant in each case.

In case I, water overflows while in II case, its level comes down.

In case II water overflows while in case in I, its level comes down.

Water overflows in both the cases.

Solution

Question 7

it being charged

its high average energy

its high average thermal speed

its low volume

Solution

Question 8

to bring oxygen for breathing

so that sunlight may enter the room

to maintain convection currents to keep the air fresh in the room

to provide an outlet for carbon dioxide

Solution

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