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Q: In Thermal Stress if the body is allowed to expand or contract freely. ________ will be set up in the body.
  • A. Tensile stresses
  • B. Compressive stresses
  • C. Shear stresses
  • D. No stresses
Correct Answer: Option D - Thermal stresses– Thermal stresses are the stresses included in a body due to change in temperature. Thermal stresses are set up in a body, when the temperature of the body is raised or lowered and the body is not allowed to expand or contract freely. But if the body is allowed to expand or contract freely, no stresses will be set up in the body.
D. Thermal stresses– Thermal stresses are the stresses included in a body due to change in temperature. Thermal stresses are set up in a body, when the temperature of the body is raised or lowered and the body is not allowed to expand or contract freely. But if the body is allowed to expand or contract freely, no stresses will be set up in the body.

Explanations:

Thermal stresses– Thermal stresses are the stresses included in a body due to change in temperature. Thermal stresses are set up in a body, when the temperature of the body is raised or lowered and the body is not allowed to expand or contract freely. But if the body is allowed to expand or contract freely, no stresses will be set up in the body.