HAC-101 Chap 59 HVAC System Diagnostic (Diesel) Test A

_____ the refrigerant before any repair or nitrogen testing is required by the Environmental Protection Agency (EPA), Section 609 of the Clean Air Act.

• Leak testing

• Dye testing

• Topping up

• Reclaiming

The process done for a typical vehicle brought in for an air-conditioning repair contains all of the following steps EXCEPT:

• Performance testing

• Leak testing

• Discharging

• Reclaiming

The under hood A/C sticker should detail:

• A/C system oil capacity.

• A/C system charge amount.

• type of refrigerant to use.

• All of the answers listed.

In a typical orifice tube system, which of the following indicates an undercharge of refrigerant?

• Both the low and the high side gauges are running higher than normal.

• The air-conditioning compressor clutch runs for a long time before it shuts off.

• The air in the ducts feels cold.

• The air-conditioning clutch has a rapid cycle time.

If the low side of an air-conditioning system reads as a vacuum:

• the compressor is not working.

• the system may be low on refrigerant.

• there is a blockage on the high side or an airflow restriction across the condenser.

• there is a blockage in the low side of the system that is not allowing refrigerant to pass.

The air-conditioning box has a ______ that allows removal of water collected from the moist air as it condenses on the cold evaporator and drips into the box.

• Collection grid

• Drain tube

• Window vent

• Level sensor

The cabin air filter should be inspected during every service and replaced according to the manufacturer's specified interval, typically every ______.

• 6,000 to 10,000 miles

• 3,000 to 5,000 miles

• 20,000 to 30,000 miles

• 12,000 to 15,000 miles

Tech A states that an air-conditioning performance test usually requires that an auxiliary condenser fan be used during the test. Tech B states that a performance test will show if the air-conditioning system is contaminated with sealer. Who is correct?

• Tech A

• Tech B

• Both A and B

• Neither A nor B

The low-pressure gauge is unique in that it displays both pressure and:

• weight of the refrigerant.

• amount of vacuum.

• results of the A/C performance test.

• None of the answers listed

________ measure the velocity of the air in FPM.

• PT charts

• Vacuum gauges

• Micron gauges

• Anemometers