Why are the connections on the floor below the fire used most frequently?
1. This allows the use of the connections on the fire floor as well.
2. The fire is approached from below rather than above.
3. If the fire were approached from above with the stair doors open and the heat of the fire rising, it would be similar to approaching the fire through a chimney.
4. It is easier to go up than down.
a. 1, 2
b. 2, 3
c. 3, 4
d. 1, 2, 3
e. 1, 2, 3, 4.
Answer: D