Rectangular sheet metal ducts are sealed using:
A) S-locks and drives cleats. B) General purpose duct tape.
C) Mastic. D) Flanges and bolts.
[Ques. 2] When should a technician record a system's baseline data?
A) Whenever the air filter is changed B) On a new system after it is installed
C) On an older system that is having problems D) Whenever refrigerant is added
[Ques. 3] Mixing valves control the final temperature of radiant loops:
A) By mixing the hot water from the boiler with the cold water from the chiller.
B) By bleeding off some of the hot water before it enters the loop.
C) By mixing the hot boiler water with fresh makeup water.
D) By mixing the hot boiler water with cooler return water.
[Ques. 4] What type of defrost do geothermal systems use?
A) Traditional time-temperature defrost B) They do not need defrosting.
C) Adaptive defrost using the air temperature D) Adaptive defrost using the ground temperature
[Ques. 5] What is the difference between bonnet capacity and firing rate?
A) Bonnet capacity is the amount of heat consumed while firing rate is the amount of heat delivered.
B) They are essentially the same thingthe amount of heat consumed.
C) Firing rate is the amount of heat consumed while bonnet capacity is the amount of heat delivered.
D) They are essentially the same thingthe amount of heat delivered.
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