Refrigerant piping must be able to adequately carry both refrigerant and:
A) Air. B) Electricity. C) Oil. D) Nitrogen.
[Ques. 2] Which of the following statements is accurate?
A) Nitrogen should not be in the system while brazing.
B) Nitrogen flow must be kept below 2 psig while brazing.
C) Nitrogen flow should be kept at design pressure while brazing.
D) Nitrogen flow must be kept at 50 psig while brazing.
[Ques. 3] Where is the suction line temperature read when adjusting a TEV?
A) As close as possible to the TEV bulb
B) As close as possible to the discharge service valve
C) At the inlet of the compressor
D) At the inlet of the evaporator
[Ques. 4] Which refrigeration device would most likely be installed in the discharge line leaving the compressor to prevent liquid refrigerant from draining from a raised condenser into the compressor head?
A) A check valve B) A crankcase pressure regulator
C) A normally-open solenoid valve D) A normally-closed solenoid valve
[Ques. 5] To increase superheat on a thermostatic expansion valve, the adjusting stem should be:
A) Turned counterclockwise B) Removed
C) Turned clockwise D) Back-seated
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