Topic: Machine Design
If the ratio of the diameter of rivet hole to the pitch of rivets is 0.25, then the tearing efficiency of the joint is
- A. 50%
- B. 75%
- C. 25%
- D. 87%
Answer: B. 75%
Explanation: The tearing efficiency of a riveted joint is calculated using the formula $\eta_t = 1 - \frac{d_h}{p}$, where $d_h/p$ represents the ratio of the rivet hole diameter to the pitch of the rivets. Substituting the given ratio yields $\eta_t = 1 - 0.25 = 0.75$, which corresponds to 75%.