The following items will test your grasp of the material covered in this lesson. There is only one correct
answer for each item. When you complete the exercise, check your answers with the answer key that
follows. If you answer any item incorrectly, study again that part of the lesson which contains the
Use the data shown in Figure 2-1 and the extract of AR 75-1 in the Appendix to answer questions one
1. Which items listed on the dud/misfire record (Figure 2-1) 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 in the Appendix to answer question 3.
3. A unit fired five 155mm illuminating projectiles (M118 series), and three were duds. Why is this
Because the dud percentage is 60% and the reportable defect rate is 15%.
Because the minimum number of reportable duds is two, and in this case there were three.
Because the minimum number of reportable duds is four, and in this case there are three
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
15 working days.
A preliminary report is not required.