1. P-traps on condensate drains should be used:
A) When the coil is on the positive side of the blower
B) When the coil is on the negative side of the blower
C) Always
2. A high temperature rise on a gas furnace can be caused by:
A) Not enough air-flow
B) A cracked heat exchanger
C) Both
3. High compressor discharge temperatures can be caused by a:
A) Low refrigerant charge
B) Blocked filter drier
C) Blocked air filter
4. On oil systems, a low CO2 and a 0 smoke could be an indication of:
A) Poor draft
B) Incorrect electrode settings
C) Too much excess air
5. The bypass plug should be installed in fuel pumps for:
A) Single pipe systems
B) Two pipe systems
C) Two stage pump, single pipe systems
