ASE A7 Heating Air Conditioning Practice Test
31. During a visual inspection, an oily spot is found on a hose leading from the compressor. Technician A says there may be a refrigerant leak in the system. Technician B says to add mineral oil to lubricate an R134a refrigerant system. Who is correct?
- A. Technician A
- B. Technician B
- C. Both A and B
- D. Neither A or B
32. The inputs of a 134a refrigerant system in a passenger car are scanned. The display is shown above. Which of the following is correct?
- A. The system has been overcharged with refrigerant.
- B. The system has an undercharge.
- C. The outside air temperature is preventing compressor clutch operation.
- D. None of these statements are correct.
33. A refrigerant service station is used to recover, evacuate, and recharge an air conditioning system. Technician A says the needle on the gauge should not increase and should remain steady after the recovery process is complete. Technician B says the system should be inspected for leaks if the needle moves more than .01 "hg after the evacuation process is complete. Who is correct?
- A. Technician A
- B. Technician B
- C. Both A and B
- D. Neither A or B
34. A vehicle has poor air conditioning performance. The customer has added R134a refrigerant to the system. Technician A says to use a refrigerant identifier. Technician B says refrigerant mixtures do not affect system pressures. Who is correct?
- A. Technician A
- B. Technician B
- C. Both A and B
- D. Neither A or B
35. A squeal is heard when the compressor clutch first engages. The MOST likely cause of this condition is:
- A. A stretched accessory belt.
- B. A low refrigerant charge.
- C. A faulty clutch pulley bearing.
- D. A faulty clutch relay.