Heat Test

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Heat Test - 4

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Weekly Quiz Competition

Question 1

1 / -0

Match the following:

a. Conduction	1. It is the process of transfer of heat in material bodies, due to the actual movement of the particles of the medium.
b. Convection	2. It is the process of transfer of heat in material bodies, without the actual movement of the particles of the medium.
c. Radiation	3. It is the process of transfer of heat from a hot body to a cold body, without the aid of any external medium.

a - 2, b - 3, c - 1

a - 2, b - 1, c - 3

a - 1, b - 2, c - 3

a - 1, b - 3, c - 2

Solution

Conduction is the process of transfer of heat in material bodies, without the actual movement of the particles of the medium.
Convection is the process of transfer of heat in material bodies, due to the actual movement of the particles of the medium.
Radiation is the process of transfer of heat from a hot body to a cold body, without the aid of any external medium.

Question 2
1 / -0

During winter, a tourist was given a choice of using either one thick blanket or two thin blankets joined together. He chose two thin blankets which were joined together. Why?

A
It would have resulted in the formation of a layer of air in between the blankets, and air is a good conductor of heat.

B
It would have resulted in the formation of a layer of air in between the blankets, and air is an insulator.

C
It would have resulted in no air formation between the two blankets.

D
None of these

Solution

The two blankets joined together would have a layer of air formed between them. Air being an insulator prevents the body heat from escaping to the surroundings.
Question 3
1 / -0

Sea breeze blows during

A
night

B
day

C
summers

D
winters

Solution

During day time, land gets heated more than sea water. Hot air above the land rises up and, therefore, the cold air from sea moves towards beach or land. This is known as a sea breeze.
Question 4
1 / -0

Which of the following options holds good, when we go out with an umbrella in the sun?

A
The umbrella allows all the heat falling on it to pass through it.

B
The umbrella reflects back all the heat falling on it.

C
The umbrella absorbs all the heat falling on it.

D
A part of the heat falling on the umbrella is reflected, part of it is absorbed and the rest is transmitted.

Solution

When the heat from the sun falls on an umbrella, a part of it is reflected, a part of it is absorbed and the rest is transmitted.
Question 5
1 / -0

The door of a running refrigerator inside a closed room was left open. Which of the following observations will be seen?

A
The room will be warmed up gradually.

B
The temperature of the room will remain unaffected.

C
The room will become as cold as the refrigerator.

D
The room will be cooled slightly.

Solution

Refrigerator is a device that transfers heat from inside a box to its surroundings.
If you leave the door open, heat is merely recycled from the room into the refrigerator, then back into the room. A net room temperature increase would result from the heat of the motor that would be constantly running to move energy around in a circle.
Question 6
1 / -0

The most commonly used thermometric substance is

A
water

B
alcohol

C
mercury

D
turpentine
Question 7
1 / -0

At what temperature on the Fahrenheit scale is the reading five times the reading on the Celsius scale?

A
5°F

B
10°F

C
25°F

D
50°F
Question 8
1 / -0

The quantity of heat required to heat a substance depends upon

A
its mass

B
rise in temperature

C
nature of substance

D
all of these
Question 9
1 / -0

The quantity of heat required to raise the temperature of 1 g of substance through 1^oC is called

A
calorie

B
specific heat

C
latent heat

D
water equivalent
Question 10
1 / -0

Quantity of heat required to convert a unit mass of a liquid at its boiling point to vapours at the same temperature is called

A
latent heat of fusion

B
thermal capacity

C
latent heat of vaporization

D
specific heat

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Heat Test - 4

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Heat Test - 4

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SHARING IS CARING

Question 1

a - 2, b - 3, c - 1

a - 2, b - 1, c - 3

a - 1, b - 2, c - 3

a - 1, b - 3, c - 2

Solution

Question 2

It would have resulted in the formation of a layer of air in between the blankets, and air is a good conductor of heat.

It would have resulted in the formation of a layer of air in between the blankets, and air is an insulator.

It would have resulted in no air formation between the two blankets.

None of these

Solution

Question 3

night

day

summers

winters

Solution

Question 4

The umbrella allows all the heat falling on it to pass through it.

The umbrella reflects back all the heat falling on it.

The umbrella absorbs all the heat falling on it.

A part of the heat falling on the umbrella is reflected, part of it is absorbed and the rest is transmitted.

Solution

Question 5

The room will be warmed up gradually.

The temperature of the room will remain unaffected.

The room will become as cold as the refrigerator.

The room will be cooled slightly.

Solution

Question 6

water

alcohol

mercury

turpentine

Question 7

5°F

10°F

25°F

50°F

Question 8

its mass

rise in temperature

nature of substance

all of these

Question 9

calorie

specific heat

latent heat

water equivalent

Question 10

latent heat of fusion

thermal capacity

latent heat of vaporization

specific heat

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