Thermal Stress Questions

Thermal stress is a type of mechanical stress generated by the change in temperature of a material. Stress is given by the formula F/A. Where F is the externally applied force expanding the body length (L) and A is an area.

Thermal stress is given by the formula:

Read more: Thermal stress

Important Thermal Stress Questions with Answers

1. Choose the correct answer: Thermal conductors contract on ______

1. Heating
2. Cooling

Answer: b) Cooling

Explanation: Thermal conductors always expand upon the application of heat and contract on cooling.

2. How is the thermal stress measured?

1. Foot
2. Feet
3. Meters
4. Option b) and c)

Answer: Option b) and c)

Explanation: thermal stress is measured using meters and feet.

3. The rate at which physical dimensions of an object change according to change in temperature is known as ______

1. Object contraction
2. Thermal expansion
3. Temperature expansion
4. None of the options

Answer: b) Thermal expansion

Explanation:

4. ______ is the instrument used to maintain a constant temperature.

1. Rheostat
2. thermistor
3. Thermostat
4. Resistor

Answer: c) Thermostat

Explanation: Thermostat is an instrument used to detect the temperature and maintain a constant temperature.

5. The rapid transient of mechanical load leads to ______

1. Thermal abrasion
2. Thermal shock
3. Thermal constant
4. Thermal degree

Answer: b) Thermal shock

Explanation: Thermal shock takes place when a material undergoes a sudden change in temperature leading to internal stresses and strains.

6. Crack on the object is formed due to ______

1. Thermal increase
2. Thermal degree
3. Thermal constant
4. Thermal shock

Answer: d) Thermal shock

Explanation: Thermal shock can lead to cracking of the object.

7. Choose the correct answer: Greater the change in temperature ______

1. Lower the level of stress
2. Higher the level of stress

Answer: Higher the level of stress

Explanation: Thermal stress increases with the increase in temperature.

8. The bimetallic strip is usually seen in which device?

The bimetallic strip is seen in a thermostat.

9. The force per unit area gives ______

1. Strain
2. Speed
3. Stress
4. Acceleration

Answer: c) Stress

Explanation: Stress is the force acting per unit area.

10. What is meant by strain?

Strain is defined as the amount of deformation experienced by the body in the direction of force applied, divided by the initial dimensions of the body.

Practice Questions

1. What is thermal stress?
2. Explain thermal stress with an example.
3. What is the formula to calculate thermal stress?
4. Write three applications of thermal stress.
5. What are the thermal properties of a material?