Engine 2014: Engineering Safety

1. A It must be marked in red letters two inches high
2. B National Standard fire hose coupling threads shall be used  having 9 threads per inch for 2 1/2 inch hose and 7 1/2 threads per inch for 1 1/2 inch hose.
3. C In heavy weather, the hose may be removed temporarily from  the hydrant.
4. D All of the above.

Tip: press A-D to answer