Heat Test

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Heat Test - 28

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Weekly Quiz Competition

Question 1
1 / -0

Woollen sweaters keep us warm because:

A
Wool is a poor conductor of heat

B
Air is trapped in between the fibres

C
Both A and B

D
None of these

Solution
Question 2
1 / -0

The most commonly used thermometric substance is

A
water

B
alcohol

C
mercury

D
steam

Solution

Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion. Hence, the slightest change in temperature is notable when it's used in a thermometer. It also has a high boiling point which makes it very suitable to measure higher temperatures, and it doesn't stick to glass.
Question 3
1 / -0

Which of the following is the coldest temperature possible?

A
0K

B
$$0^{\circ}$$C

C
$$0^{\circ}$$F

D
$$-273^{\circ}$$F

Solution

Absolute zero, technically known as zero kelvins, equals −273.15 degrees Celsius, or -459.67 Fahrenheit, and marks the spot on the thermometer where a system reaches its lowest possible energy or thermal motion. So it's the coldest temperature possible.
Question 4
1 / -0

Electric heaters used for cooking have the filament or the heating coil on a plate made up of clay because:

A
Clay is a bad conductor of heat

B
Clay is a bad conductor of electricity

C
Clay is necessary for good taste

D
Both $$A$$ and $$B$$

Solution

The materials which do not allow heat and electricity to pass through them easily are called insulators. For example, clay.
Electric heaters used for cooking have the filament or the heating coil on a plate made up of clay because clay is a bad conductor of heat.
Question 5
1 / -0

Heat energy produces a sensation of-

A
warmth

B
coldness

C
both warmth and coldness

D
none of these

Solution

Heat energy is the result of the movement of tiny particles called atoms, molecules or ions in solids, liquids and gases. Heat energy can be transferred from one object to another. The transfer or flow due to the difference in temperature between the two objects is called heat.
Heat energy produces a sensation of warmth
Question 6
1 / -0

The range of a labaratory thermometer is generally from

A
$${ 10 }^{ \circ} C$$ to $${ 115 }^{ \circ }C$$

B
$${ -10 }^{ \circ} C$$ to $${ 110 }^{ \circ }C$$

C
$${ 10 }^{ \circ} C$$ to $${ 120 }^{ \circ }C$$

D
$${ -10 }^{ \circ} C$$ to $${ 150 }^{ \circ }C$$

Solution

A laboratory thermometer, which is colloquially known as the lab thermometer, is used for measuring temperatures other than the human body temperature. It ranges from $$-10˚C$$ to $$110˚C$$. Laboratory thermometers are designed for lab purposes such as checking boiling point, freezing point, or temperature of other substances.
Question 7
1 / -0

A clinical thermometer reads temperature from

A
$${ 35 }^{ \circ }{C }$$ to $${ 42 }^{ \circ}{C }$$

B
$${ 30 }^{ \circ}{ C }$$ to $${ 42 }^{ \circ}{ C }$$

C
$${ 25 }^{ \circ}{ C }$$ to $${ 42 }^{ \circ}{ C }$$

D
$${ 20 }^{ \circ}{ C }$$ to $${ 42 }^{ \circ}{ C }$$
Question 8
1 / -0

Directions For Questions

In above shown figure, a candle is burning inside the metal box. The heat transfer between box and its surrounding can be by three types of heat transfer.
I. radiation
II. conduction
III. convection

...view full instructions

Heat can be transferred to the inside surface of the walls of the container by which of the above?

A
I only

B
I and II only

C
I and III only

D
II only

E
I, II, and III only

Solution

As the candle is burning, it radiates heat in the form of infrared radiation, and also heats the air around it, creating convection currents that reach the inner walls of the container.
Conduction of heat is not responsible for heating up the inner wall as there is no direct contact between the flame and the inner wall.
Question 9
1 / -0

Heat travels through vacuum by:

A
convection

B
radiation

C
conduction

D
of all these

Solution

The process of convection and conduction requires some medium made of material particle for transmission of heat. In vacuum there is no material. So, heat travels in vacuum by radiation.
Question 10
1 / -0

Identify the statement in which the mode of heat transfer is convection ?

A
The heat of the sun warming our planet

B
The heat from an electric stove warming a frying pan

C
Ice cubes cooling a drink

D
A microwave oven cooking a meal

E
An overhead fan cooling a room

Solution

When an ice cube melts in a drink, the molecules of the drink at a higher temperature come to the ice cube and cool down. Whereas the melted particles of ice go to fulfill the empty space from where molecules of the drink have come. As the particles are moving in this heat transfer, so it is convection.

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Re-Attempt Weekly Quiz Competition

Heat Test - 28

Result

Heat Test - 28

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Rank

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SHARING IS CARING

Question 1

Wool is a poor conductor of heat

Air is trapped in between the fibres

Both A and B

None of these

Solution

Question 2

water

alcohol

mercury

steam

Solution

Question 3

0K

$$0^{\circ}$$C

$$0^{\circ}$$F

$$-273^{\circ}$$F

Solution

Question 4

Clay is a bad conductor of heat

Clay is a bad conductor of electricity

Clay is necessary for good taste

Both $$A$$ and $$B$$

Solution

Question 5

warmth

coldness

both warmth and coldness

none of these

Solution

Question 6

$${ 10 }^{ \circ} C$$ to $${ 115 }^{ \circ }C$$

$${ -10 }^{ \circ} C$$ to $${ 110 }^{ \circ }C$$

$${ 10 }^{ \circ} C$$ to $${ 120 }^{ \circ }C$$

$${ -10 }^{ \circ} C$$ to $${ 150 }^{ \circ }C$$

Solution

Question 7

$${ 35 }^{ \circ }{C }$$ to $${ 42 }^{ \circ}{C }$$

$${ 30 }^{ \circ}{ C }$$ to $${ 42 }^{ \circ}{ C }$$

$${ 25 }^{ \circ}{ C }$$ to $${ 42 }^{ \circ}{ C }$$

$${ 20 }^{ \circ}{ C }$$ to $${ 42 }^{ \circ}{ C }$$

Question 8

I only

I and II only

I and III only

II only

I, II, and III only

Solution

Question 9

convection

radiation

conduction

of all these

Solution

Question 10

The heat of the sun warming our planet

The heat from an electric stove warming a frying pan

Ice cubes cooling a drink

A microwave oven cooking a meal

An overhead fan cooling a room

Solution

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