- 9 Which Of The Following Discontinuities May Result In Fatigue Crack Initiation A Flash Line Of Forging B Improper 1 (326.19 KiB) Viewed 27 times
9. Which of the following discontinuities may result in fatigue crack initiation? (A) Flash line of forging (B) Improper assembly (C) Stamp marks (D) Poor joint design (E All of the above Answer: 10. Which of the following statements is true? (A) The greater the contact ratio the smoother and quieter the operation of the gear. (B) The contact ratio is only a function of the number of teeth. (C) The lower the contact ratio the smoother and quieter the operation of the gear. (D) Contact ratios smaller than one is acceptable but only for spur gears. (E) None of the above is true.