When raising pressure in a firetube boiler you should:
1. raise steam slowly
2. raise steam as rapidly as possible
3. check the furnace frequently
4. check the system for leaks
a) 2, 3, 4
b) 1, 2, 3, 4
c) 1, 3, 4
d) 1, 2, 3
e) 2, 4
Answer: C