To avoid turning the hermetic compressor shell into an exploding bomb, keep the system pressure below:
A) 200 psig. B) 300 psig. C) 150 psig. D) 250 psig.
[Ques. 2] In order to leak test a low-pressure chiller, the chiller pressure:
A) Must be increased to a positive pressure less than 10 psig.
B) Should be increased by adding nitrogen.
C) Must be reduced to a safe level, under 150 psig.
D) Must be recovered and replaced with nitrogen.
[Ques. 3] What is auxiliary heat?
A) A heating system that is not really needed
B) A separate system connected to the same ductwork
C) A heating system that operates using green alternative energy
D) Another heat source added to make up the difference between the heat pump capacity and the house load
[Ques. 4] Most circuits put all the controls on:
A) One side of a load. B) The 24 volt side of the load.
C) Both sides of a load. D) Line voltage side of the load.
[Ques. 5] How does increased ventilation sometimes help to improve indoor air quality?
A) The pollutants are purged using a pollutant purge timer, PPT.
B) It improves the efficiency of the HEPA filters by increasing the velocity of air across the filters.
C) It reduces the contaminant level through dilution.
D) The contaminated indoor air is replaced with pollutant-free outside air.
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