ACR-206 Chapter 59 Test (CRF)

The __________ typically disables the A/C system if pressures fall below 10 psi (69 kPa).

• Low-pressure switch

• TXV (thermal expansion valve)

• Heater control

• High-pressure relief

Which of the following is the most common source of abnormal noises arising from the air conditioner?

• Evaporator

• Compressor

• Accumulator

• Muffler

Which of the following is the first step in the diagnostic process for air-conditioning systems?

• System pressure test

• Diagnosis of faults

• Performance testing

• Check for codes in the computer

A __________ is connected to the air-conditioning refrigerant ports before the performance test begins.

• Thermometer

• Manifold pressure gauge set

• Micron gauge

• Safety switch

Which of the following works very well for testing discharged systems or for pre-checking for a leak after repairs have been made and before recharging the system?

• Fluorescent dye

• Oxygen

• Compressed Air

• Nitrogen

Which of the following is NOT a method of leak testing? Select one:

• Vacuum testing

• Electronic leak detection

• Dye testing

• Nitrogen testing

Flushing with __________ may be necessary for some components, as this removes moisture-laden oil and some contaminated oil. Select one:

• Nitrogen

• Compressed air

• Refrigerant gas

• Lubrication oil

If nitrogen testing is the leak test method to be performed, what step would you proceed to next? Select one:

• Diagnosing

• Charging

• Evacuation

• Reclaiming

What is the act of removing the refrigerant called? Select one:

• Reclaiming

• Flushing

• Recharging

• Recycling

The type of refrigerant must remain the same because cross-contamination will create a(n) __________. Select one:

• Hazardous substance

• Strong enough magnetic pull

• Inefficient cooling system

• Increased energy consumption

• System malfunction