Thermal Properties of Materials: Heat Capacity and Thermal Conductivity

Question 1

Which material exhibits the highest thermal conductivity?

Accepted Answer

Copper

Answer

Steel

Answer

Aluminum

Answer

Wood

Question 2

A material with high thermal conductivity will:

Accepted Answer

Efficiently transfer heat

Answer

Slowly transfer heat

Answer

Effectively store heat

Answer

Possess a low specific heat

Question 3

The preferred unit for thermal conductivity is:

Accepted Answer

W/(m*K)

Answer

J/(g*K)

Answer

cal/(g*°C)

Answer

K/(W*m)

Question 4

Which material exhibits a negative coefficient of thermal expansion?

Accepted Answer

Water

Answer

Steel

Answer

Rubber

Answer

Glass

Question 5

Heat transfer through fluid movement is known as:

Accepted Answer

Convection

Answer

Conduction

Answer

Radiation

Answer

Diffusion

Question 6

Which material serves as an effective thermal insulator?

Accepted Answer

Polystyrene

Answer

Copper

Answer

Concrete

Answer

Water

Question 7

The approximate specific heat of water is:

Accepted Answer

4.2 J/(g*K)

Answer

1 J/(g*K)

Answer

1 cal/(g*°C)

Answer

0.5 W/(m*K)

Question 8

What is the SI unit for specific heat capacity?

Accepted Answer

J/g°C

Answer

J/mol°C

Answer

cal/g°C

Answer

kcal/mol°C

Question 9

A material with low specific heat capacity will:

Accepted Answer

Require less energy to raise its temperature.

Answer

Require more energy to raise its temperature.

Answer

Have high thermal conductivity.

Answer

Be a good thermal insulator.

Question 10

Which process involves heat transfer through a material by the movement of its molecules?

Accepted Answer

Conduction

Answer

Convection

Answer

Radiation

Answer

Diffusion

Question 11

What happens to a material with a high thermal expansion coefficient?

Accepted Answer

It expands significantly with increasing temperature.

Answer

It expands minimally with increasing temperature.

Answer

It contracts with increasing temperature.

Answer

It remains at a constant size with increasing temperature.

Question 12

Which factor does NOT influence the specific heat of a material?

Accepted Answer

Temperature

Answer

Atomic mass

Answer

Molecular structure

Answer

Phase state

Question 13

Which of the following materials serves as an effective thermal insulator?

Accepted Answer

Air

Answer

Copper

Answer

Steel

Answer

Aluminum

Question 14

The thermal conductivity of a material represents:

Accepted Answer

Its ability to transfer heat.

Answer

Its ability to store heat.

Answer

Its ability to expand when heated.

Answer

Its ability to contract when heated.

Question 15

Which of the following is NOT a recognized unit of thermal conductivity?

Accepted Answer

Kilocalories per hour-meter-Kelvin

Answer

Watts per meter-Kelvin

Answer

Joules per second-meter-Kelvin

Answer

British thermal units per foot-hour-degree Fahrenheit

Question 16

Which material has the lowest specific heat?

Accepted Answer

Air

Answer

Water

Answer

Aluminum

Answer

Steel

Question 17

Which material possesses the highest specific heat capacity?

Accepted Answer

Water

Answer

Steel

Answer

Aluminum

Answer

Copper

Question 18

What is the primary function measured by thermal conductivity?

Accepted Answer

Heat conduction ability

Answer

Heat dissipation rate

Answer

Heat absorption capacity

Answer

Heat reflection efficiency

Question 19

Which factor significantly influences the thermal conductivity of a material?

Accepted Answer

Temperature

Answer

Color

Answer

Pressure

Answer

Shape

Question 20

Which material is commonly employed as a thermal insulator due to its low thermal conductivity?

Accepted Answer

Styrofoam

Answer

Concrete

Answer

Carbon fiber

Answer

Steel

Question 21

What is the term used to describe a material's dimensional change in response to temperature fluctuations?

Accepted Answer

Thermal expansion

Answer

Thermal deformation

Answer

Thermal contraction

Answer

Thermal stability

Question 22

What is the primary cause of thermal stress in materials?

Accepted Answer

Uneven temperature distribution

Answer

Mechanical loading

Answer

Chemical reactions

Answer

Electrical currents

Question 23

In which application is the thermal insulation property of materials crucial?

Accepted Answer

Building construction

Answer

Power generation

Answer

Automotive engineering

Answer

Medical imaging