The questions that follow will test your grasp of the material covered in this lesson. There is only one correct
answer for each question. When you have completed the exercise, check your answers with the answer key that
follows. If you answer any question incorrectly, study again that part of the lesson that pertains to your incorrect
Use the data shown in the table on page 3-2 and the extract of AR 75-1 on page A-2 in the Appendix to answer
questions 1 and 2.
1. Which items listed on the dud/misfire record have reportable malfunction rates?
All items listed.
Items 1, 2, 4, 5, 6, and 7.
Items 2, 5, and 7.
Items 1, 2, 4, 5, and 7.
2. What is the dud percentage rate for the listed 105mm illuminating cartridge (DODIC C449)?
Use the extract of AR 75-1 on page A-2 in the Appendix to answer question 3
3. A unit fired five 155mm illuminating projectiles (M118 series), and three were duds. Is this reportable?
Yes. Because the dud percentage is 60 percent and the reportable defect rate is 15 percent.
Yes. Because the minimum number of reportable duds is two, and in this case there were three.
No. Because the minimum number of reportable duds is four, and in this case there were three.
No. Because there may be other units firing the same lot, which could change the percentage.
4. A using unit reports that they fired 10 WP mortar rounds, and all 10 failed to detonate. How much time
do you have to conduct the preliminary investigation and submit the preliminary malfunction report?
15 working days.
A preliminary report is not required.