How does a fluorescent dye leak detector work?
A) It is applied evenly to the outside of an area suspected of a leak.
B) It dyes the refrigerant oil so that escaping oil leaves traces of dye.
C) It is used in conjunction with ultrasonic detectors to improve the resolution of the mechanical ultrasound.
D) It dyes the refrigerant, so that escaping gas leaves a visible cloud.
[Ques. 2] How can a technician verify that a condenser and evaporator are an AHRI match?
A) Ask the salesman at the parts counter.
B) Check them out on the AHRI web site.
C) Check with the EPA.
D) The correct matches are printed on the unit nameplate.
[Ques. 3] Why is it important to measure the vacuum level on the system?
A) To determine when there is no more air B) To determine when evacuation is complete
C) To determine when there is no more moisture D) To determine when evacuation has started
[Ques. 4] One technique for improving efficiency and comfort through compressor selection is to select a:
A) Compressor with 25 greater capacity than the maximum anticipated refrigeration load.
B) Compressor with capacity control to match the compressor capacity with the refrigeration load.
C) Compressor that is designed for a colder evaporator temperature to achieve lower evaporator pressure and increased efficiency.
D) Compressor with a capacity equal to the minimum anticipated refrigeration load.
[Ques. 5] The published SEER rating of a unit is accurate:
A) With any coil the unit is connected to. B) With any coil under any condition.
C) Only with an AHRI matched evaporator. D) Only at the AHRI A design condition.
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