Topic: Material Science
The notch angle of Izod impact test specimen is
- A. $10^{\circ}$
- B. $20^{\circ}$
- C. $22\frac{1}{2}^{\circ}$
- D. $45^{\circ}$
Answer: D. $45^{\circ}$
Explanation: The IZOD impact test is used to determine the impact resistance (toughness) of material. The notch angle of the standard IZOD impact test specimen is $45^{\circ}$.