When correcting the system concern, you must:
A) Correct the obvious symptoms first. B) Document the correct operation of the system.
C) Replace the major system components. D) Be sure to address the root cause of the concern.
Q. 2You should flush the system:
A) For 5 to 10 minutes per foot of line.
B) Until the solvent can is empty.
C) Until no more oil or debris comes out of the line.
D) For 5 to 10 minutes per pound of charge.
Q. 3What breaks down to form poisonous gas in the presence of flames?
A) A1 refrigerant only B) Compressor insulation
C) Halogenated refrigerants D) Refrigerant oil
Q. 4Which system heats a room more consistently, leading to fewer cold spots?
A) radiant floor heating system B) forced-hot-air system
C) fan coil heating system D) baseboard radiator systems
Q. 5Typically, the zone control valve not only opens to allow water to flow to the zone, but also turns on
A) the boiler B) the circulator pump
C) the fan coil unit D) the blower
Q. 6Mixing valves used to control the final temperature of radiant loops
A) by mixing the hot boiler water with cooler return water
B) by bleeding off some of the hot water before it enters the loop
C) by mixing the hot water from the boiler with the cold water from the chiller
D) by mixing the hot boiler water with fresh makeup water
Q. 7How does an oil acid test kit indicate the presence of acid?
A) The test kit produces a strong pungent odor. B) The word acidic appears on the test strip.
C) By a color change D) The liquid in the sample tube boils.
Q. 8Zone control is accomplished in hydronic systems using thermostats that activate
A) a zone control valve for each zone B) a zone compressor for each zone
C) a zone boiler for each zone D) a zone damper for each zone
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