Q. How is the interior bursting-charge marked?
A. By a distinct color around the base below the rotating-band.
Q. Give the colors for the following metals:
| 1. Forged steel. | A. | 1. Blue-gray. |
| 2. Cast steel. | 2. Brownish gray. | |
| 3. Cast iron. | 3. Olive-green. | |
| 4. Chilled iron. | 4. Light olive-green. |
Q. Give the colors for the following bursting-charges:
| 1. Gunpowder. | A. | 1. Bright red. |
| 2. Maximite. | 2. Brown. | |
| 3. Explosive D. | 3. Yellow. |
FRANKFORD ARSENAL 21-SECOND COMBINATION FUSE. (Centrifugal.)