Free Car Air Conditioning Repair Question and Answers

Question 1

Which of the following circumstances is most likely to result in a car overheating?

Accepted Answer

Clogged radiator

Answer

Restricted heater core

Answer

Thermostat stuck open

Answer

Electric cooling fan runs all the time

Question 2

According to Technician A, when the condenser airflow is restricted, both the high and low lines are under high pressure. When the pressure is low on both the high and low sides, according to technician B, this is a sign of low refrigerant. Who is correct?

Accepted Answer

Both Technician A and B

Answer

Technician B only

Answer

Technician A only

Answer

Neither Technician A nor B

Question 3

The following facts about an air conditioning performance test are all true, EXCEPT for

Accepted Answer

To avoid outside odor, operate AC System in RECIRC rather than FRESH mode

Answer

Obstructions of the cabin air filter may cause insufficient air circulation.

Answer

Road debris can clog the condenser fins reducing system performance

Answer

Passenger-side floor being wet is one symptom of a clogged evaporator drain line

Question 4

The engine may run excessively cold, according to Technician A, if the thermostat is broken. The thermostat can generate a pinging or pounding noise if it is jammed closed, according to technician B. Who is correct?

Accepted Answer

Both Technician A and B

Answer

Technician B only

Answer

Technician A only

Answer

Neither Technician A nor B

Question 5

The technician observes that the compressor output is warm when testing the performance of the air conditioner. This is a typical condition, according to technician A. The air conditioning system, according to technician B, is overcharged. Who is correct?

Accepted Answer

Technician A only

Answer

Technician B only

Answer

Neither Technician A nor B

Answer

Both Technician A and B

Question 6

If the condenser fan wasn't working, what high-side and low-side pressure gauge readings might a technician discover?

Accepted Answer

Both high-side high and low-side are high

Answer

High-side high and low-side low

Answer

High-side low and low-side high

Answer

Both high-side high and low-side are low

Question 7

Which of the following issues will result in the various gauge readings depicted in the illustration?

Accepted Answer

Refrigerant overcharge

Answer

Low refrigerant

Answer

Expansion valve stuck closed

Answer

Restricted condenser airflow