1. Recommended manifold pressure on a natural gas system is:
A) 10" wc
B) 3.5 lb
C) 3.5" wc
2. When venting a 90+ furnace, the vent piping should be:
A) Pitched towards the termination kit
B) Pitched towards the furnace
C) Installed level
3. Recommended draft over-fire on oil-fired equipment should be:
A) .01 - .02 overfire
B) .08 - .09 overfire
C) 1 - 2 overfire
4. Recommended smoke readings are:
A) 0 - trace
B) 1 - 2
C) 8 - 10
5. When evacuating a system, a vacuum gauge that won't pull below 1000 microns could indicate:
A) Moisture in the system
B) A leak in the system
C) Both
