Heat Transfer

Q. Match the following:​

Q.

Boiling is a/an ___ phenomenon.

1. surface

2. dynamic surface

3. atmospheric

4. bulk

Q.

The transition of a substance directly from the solid to the gaseous phase without passing through the intermediate liquid phase is known as ___.

1. freezing

2. boiling

3. melting

4. sublimation

Q.

Which of the following is not a mode of heat transfer?

1. All of these

2. Conduction

3. Convection

4. Radiation

Q. Which of these is true about the direction of heat flow?

1. Heat flows from a hot body to a cold body.
2. Heat flows from a cold body to a hot body.
3. Heat flows in a random manner.
4. Heat flows from a greater height to a lower height.

Q.

Heat energy flows from one body to another if there is a difference in ________ between the two bodies.

1. Mass

2. Amount of Heat Energy

3. Temperature

4. Both B and C

Q.

Predominantly, in which of the following does heat transfer takes place through conduction?

1. Solid

2. Liquid

3. Gas

4. Can’t be said

Q.

In which of the following states, atoms are closest to each other?

1. Gas

2. Solid

3. Can’t be said

4. Liquid

Q.

When two bodies A and B are brought in contact with each other, heat does not flow between them. When another body C is brought in contact with B, the heat starts flowing from C to B. After the heat flow stops, C is now brought into contact with A, then which of the following is correct?

1. No heat flows between A and C.

2. Heat flows from A to C.

3. Heat flows from C to A.

4. Heat first flows from A to C and then from C to A.

Q.

Air flows from a region of low pressure to a region of high pressure.

1. True

2. False