20.—What is the burst area of a shrapnel shell?
21.—What is the safest protective formation against shrapnel?
22.—What is the difference between a shrapnel shell, a time-fuse high explosive shell and a percussion high explosive shell?
23.—What is the burst area of a time-fuse high explosive shell?
24.—What is the safest protective formation against it?
25.—What is the burst area of percussion high explosive shells, and what precautions can be taken against them?
26.—What is the safest protective formation against all types of shells?
27.—What objections may it be open to?
28.—What is the safest way and direction to go when under artillery fire?