What should a technician do with a DOT 39 nonrefillable cylinder when it is empty?
A) Once most of the refrigerant has been used, the residual may be released to the air.
B) Recover any remaining refrigerant, open the valve, knock out the relief disk, and label it EMPTY.
C) The cylinder should be returned to the refrigerant manufacturer to be reused.
D) Knock out the relief disk to remove the residual refrigerant and label the cylinder empty.
B
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If the maximum frequency present in an analog waveform in the accompanying image must be less than _______ µs.
Fill in the blank(s) with the appropriate word(s).
Technician A says that air should flow though a normally-closed air solenoid when the solenoid is not energized. Technician B says that there should be continuity between the common terminal and normally-closed terminal of a relay that is not energized. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B
?Technician A says when removing a seal, inspect the sealing surface or lips. Technician B says this check should be done before cleaning the seal. Who is correct?
A. ?A only B. ?B only C. ?Both A and B D. ?Neither A nor B
Which of the following statements is LEAST-Likely true?
A. If there is less than a 20F difference between the outlet and inlet temperatures of the accumulator, the refrigerant coming from the outlet is still liquid. B. An accumulator system is also called a "dual evaporator" system. C. A 50F difference between the accumulator inlet and outlet temperatures or frost on the accumulator can indicate two things: either the system is overcharged or the clutch is not cycling. D. In an expansion valve system, a flooded evaporator is bad.