Heat Transfer Test

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Heat Transfer Test - 3

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Weekly Quiz Competition

Question 1
4 / -1

What is heat transfer?

A
Flow of thermal energy from low-temperature reservoir to high-temperature reservoir

B
Flow of energy in the form of heat from high-temperature reservoir to low-temperature reservoir

C
Flow of thermal energy irrespective of reservoir temperature

D
None of the above

Solution

Heat transfer is a branch of thermal engineering which deals with the study of transfer of energy from a high-temperature reservoir to low-temperature reservoir.
Question 2
4 / -1

Which of the following is a method of heat transfer?

A
Convection

B
Radiation

C
Conduction

D
All of the mentioned

Solution

Methods of heat transfer are:
i) Conduction: Heat is transferred by solid materials.
ii) Convection: Heat is transferred by gases.
iii) Radiation: Heat is transferred by electromagnetic waves.
Question 3
4 / -1

Heat transfer takes place according to which of the following law?

A
Newton’s second law of motion

B
First law of thermodynamics

C
Newton’s law of cooling

D
Second law of thermodynamics

Solution

The total entropy of an isolated system (the thermal energy per unit temperature that is unavailable for doing useful work) can never decrease, according to the second law of thermodynamics.
Question 4
4 / -1

Which of the following is the rate of heat transfer unit?

A
Watt

B
Pascal

C
Joule

D
Newton

Solution

The joule is the unit of heat transfer, while the rate of heat transfer is measured in joules per second, i.e., watts.
Question 5
4 / -1

Which of the following is an example of steady-state heat transfer?

A
Electric bulb cools down by the surrounding atmosphere

B
Chilling effect of cold wind on a warm body

C
Boilers and turbines

D
Cooling of I.C engine

Solution

The system is a perfect black body.
Question 6
4 / -1

Which way is heat transfer believed to take place in a long, hollow cylinder that is kept at consistent but varied temperatures on its inner and outer surfaces?

A
Unpredictable

B
Radial only

C
No heat transfer takes place

D
Axial only

Solution

On the periphery of the cylinder, the ambient temperature is uniform, and the temperature is uniform. As a result, it only occurs in the radial direction.
Question 7
4 / -1

Which of the following is correct regarding one dimensional heat transfer?

A
Steady – f (x, y, t), Unsteady – f (x)

B
Steady – f (y, z), Unsteady – f (y)

C
Steady – f (x, t), Unsteady – f (x)

D
Steady – f (x), Unsteady – f (x, t)

Solution

In a one-dimensional heat flow, steady state is determined solely by the x coordinate, whereas unstable state is determined solely by the x coordinate and time.
Question 8
4 / -1

A person prefers to sit by a fire during the cold winter months. Which of the following heat transfer types gives him with the most heat?

A
Convection and radiation together

B
Radiation will provide quick warmth

C
If it is near the fire, convection sounds good

D
Conduction from the fire

Solution

Even when separated by a medium that is colder than both of them, heat transmission by radiation can occur between two bodies.
Question 9
4 / -1

On which of the following does convective heat transfer coefficient doesn’t depend?

A
Orientation of solid surface

B
Time

C
Surface area

D
Space

Solution

It is represented by the letter h and is affected by space, time, geometry, and the orientation of a solid surface.
Question 10
4 / -1

In liquids and gases, heat transmission is primarily caused by

A
Convection

B
Radiation

C
Conduction

D
Conduction as well as convection

Solution

Convection is the transfer of thermal energy between a solid and a fluid flowing through it.

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Heat Transfer Test - 3

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Heat Transfer Test - 3

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SHARING IS CARING

Question 1

Flow of thermal energy from low-temperature reservoir to high-temperature reservoir

Flow of energy in the form of heat from high-temperature reservoir to low-temperature reservoir

Flow of thermal energy irrespective of reservoir temperature

None of the above

Solution

Question 2

Convection

Radiation

Conduction

All of the mentioned

Solution

Question 3

Newton’s second law of motion

First law of thermodynamics

Newton’s law of cooling

Second law of thermodynamics

Solution

Question 4

Watt

Pascal

Joule

Newton

Solution

Question 5

Electric bulb cools down by the surrounding atmosphere

Chilling effect of cold wind on a warm body

Boilers and turbines

Cooling of I.C engine

Solution

Question 6

Unpredictable

Radial only

No heat transfer takes place

Axial only

Solution

Question 7

Steady – f (x, y, t), Unsteady – f (x)

Steady – f (y, z), Unsteady – f (y)

Steady – f (x, t), Unsteady – f (x)

Steady – f (x), Unsteady – f (x, t)

Solution

Question 8

Convection and radiation together

Radiation will provide quick warmth

If it is near the fire, convection sounds good

Conduction from the fire

Solution

Question 9

Orientation of solid surface

Time

Surface area

Space

Solution

Question 10

Convection

Radiation

Conduction

Conduction as well as convection

Solution

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