Topic: Material Science
The ultimate tensile strength and yield strength of most of the metals, when temperature falls from 0 to -150 °C will
- A. Increase
- B. Decrease
- C. Remain same
- D. First increase and then decrease
Answer: A. Increase
Explanation: Ultimate tensile stress is the maximum nominal stress attained by a test specimen during a simple tensile test. The ultimate strength of materials increases with a decrease in temperature. Therefore, as the temperature falls from 0 to -150 °C, both ultimate tensile strength and yield strength will increase.