A normal operational refrigerant release would be:
A) Venting refrigerant to correct an overcharge.
B) Releases from purge cycle operation.
C) Releasing the charge to change the metering device.
D) Venting the charge to change a compressor.
[Ques. 2] Releases of refrigerant that result from connecting or disconnecting gauge hoses:
A) Are permissible under the EPA regulations.
B) Are punishable under a special reduced-penalty provision for small infractions.
C) Must be prevented by recovering the refrigerant from the gauge hoses each time they are connected.
D) Must be prevented by using special low-loss adapters.
[Ques. 3] Why is it possible to use smaller vent pipes in higher-efficiency units?
A) The temperature of the flue gases is higher.
B) Condensation pushes the gas through the pipes.
C) Volume and temperature of flue gases are lower.
D) The volume of the flue gases is greater.
[Ques. 4] A crucial requirement whenever a rooftop installation is considered is:
A) That rooftop units can only be installed on flat roofs.
B) To ensure that the roof structure can support the weight of the equipment.
C) That a power drop can be made directly from the utility pole to the unit.
D) To ensure that the unit cannot be seen from the front of the building.
[Ques. 5] What could cause a false high reading for the supply-air temperature?
A) The temperature is taken with the blower on at the same time the heating elements are on.
B) The temperature is taken with a probe inserted upside down.
C) The probe is inserted in the supply plenum in a direct line of sight with the heating elements.
D) The temperature is taken after the unit has been running for too long.
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