ASE A7 Practice Test

All of these statements regarding an air conditioning performance test are true EXCEPT:

Technician A states that when the condenser airflow is restricted, the pressure is high in both the high and low lines. Technician B states that when both high and low sides show low pressure, it’s often an indication of low refrigerant.

Who is correct?

The A/C compressor high-pressure release valve discharges refrigerant at what approximate measurement?

All of these statements regarding A/C-heater control panel service are accurate EXCEPT:

Incoming air is heated in the vent position with the temperature selector in the cool position. What might be the problem?

To charge the air conditioning system while it runs, refrigerant must be added to:

During a performance test, technicians notice the compressor outlet is hot. Technician A believes this is normal. Technician B believes the system is overcharged.

Who is correct?

All of these tasks occur when replacing the AC compressor EXCEPT:

Using a DMM, technicians measure 12 volts at the clutch coil, but it doesn’t engage. Technician A believes the bad clutch coil is the cause.

Technician B believes that the bad clutch coil ground is the issue. Who is correct?

While filling an A/C system recovery container with recovered refrigerant, the capacity you can fill the container would be:

After a recovery process, low-side pressure indicates above zero after five minutes. This condition means:

Technician A believes that a radiator needs to be inspected for leaks prior to installing a rebuilt engine. Technician B states that overheating during slower travel might be caused by the electric cooling fan fault.

Who is correct?

If the cooling system operates too cool, the engine will do what?

All of these statements regarding the computer-controlled A/C system actuator motor are correct EXCEPT:

A recirculate door isn’t working. All of these might be the cause EXCEPT:

The moisture warning light on the recovery/recycling equipment shows yellow in the recycling process. This shows:

Technician A states that a misadjusted temperature door might cause poor heat. Technician B states that a defective resistor trio might cause the no high blower condition.

Who is correct?

A heater blows only cold air at operating temperature. Technician A states it must be a stuck closed thermostat. Technician B states the coolant system might be running low on coolant.

Who is correct?

All of these statements are accurate in relation to the expansion valve, EXCEPT:

A customer comes in with the complaint that the heater will not blow warm air. It blows cold air when engaged. All fan speed settings work, however the temperature never increases.

Which of the following issues is most likely to blame?