Question

1. Which of the following air-conditioning components may be different on a hybrid electric vehicle?

A. Blower motor
B. Evaporator
C. Compressor
D. Condenser

2. The switch mounted on some accumulators is usually used to

A. sense high-side pressure and cycle the compressor.
B. start the radiator fan when the AC system comes to pressure.
C. sense low-side pressure and cycle the compressor.
D. prevent compressor operation if there's an overcharge.

3. The operation of a TXV is controlled by the

A. thermostatic spring.
B. external pressure of the evaporator.
C. modulating valve.
D. temperature bulb.

4. A front-wheel drive vehicle has a broken condenser line. What other vehicle component may also be defective that could have caused the condenser line to break?

A. Engine mounts
B. AC compressor drive belt
C. Cooling fan
D. Shock absorbers

5. Which of the following makes a true statement? An orifice tube is

A. always used with a swash-plate compressor.
B. located between the receiver-drier and evaporator.
C. connected to a sensing temperature bulb.
D. a fixed-diameter device that comes in different colors.

6. The _______ atom in R-12 is believed to break off in the upper atmosphere and attack ozone molecules.

A. ultraviolet
B. chlorine
C. fluorine
D. oxygen

7. What's the function of the desiccant bag inside an accumulator?

A. All of these options
B. Capturing and storing moisture
C. Storing and releasing ice
D. Holding excess R-134a

8. Which of the following refers to latent heat?

A. Gas heated above its boiling point
B. Liquid and vapor in a confined area
C. Amount of heat that increases liquid temperature by five degrees
D. Amount of heat needed to change a liquid to a gas

9. The compressor in an AC system is least likely needed to

A. make gas hotter than ambient air.
B. lower the gas pressure.
C. keep refrigerant circulating.
D. increase the gas pressure.

10. Clear water is observed dripping out from beneath the vehicle. Technician A says that's normal. Technician B says that the evaporator housing is defective and should be replaced. Which technician is correct?

A. Both Technicians A and B
B. Neither Technicians A nor B
C. Technician B
D. Technician A

11. What color is the container for R-134a refrigerant?

A. Dark green
B. White and yellow
C. Yellow
D. Light blue

12. Compressing a vapor

A. decreases the pressure and increases the temperature.
B. increases the pressure and increases the temperature.
C. increases the pressure and decreases the temperature.
D. decreases the pressure and decreases the temperature

13. R-12 should be recycled instead of vented to the atmosphere because

A. R-12 is unstable.
B. R-12 is expensive.
C. recycling companies offer large financial incentives.
D. it has been proven to deplete the Earth's ozone layer.

14. Two technicians are describing how an air-conditioning system gets rid of the heat. Technician A says that heat always flows from the hotter to the colder object. Technician B says that as a refrigerant evaporates, it absorbs heat as it changes from a liquid to a gas. Who is correct?

A. Technician A only
B. Neither Technician A nor B
C. Technician B only
D. Both Technicians A and B

15. Technician A says that all HFC-134a uses the same refrigerant oil. Technician B says that refrigerant oil, regardless of type, must be kept in a sealed container to keep it from absorbing moisture from the air. Who is correct?

A. Neither Technicians A nor B
B. Technician B
C. Both Technicians A and B
D. Technician A

16. The ambient temperature sensor is usually mounted

A. at the intake cowl.
B. in none of these areas.
C. in the climate control plenum.
D. in front of the radiator.

17. Technician A says that vapor has a fixed volume that remains the same when temperature increases. Technician B says that decreasing the temperature on a vapor will increase the pressure. Who is correct?

A. Technician A
B. Both Technician A and Technician B
C. Technician B
D. Neither Technician A nor B

18. The blower motor resistors are used to lower _______ to the motor.

A. dust and debris
B. voltage and current
C. airflow
D. vacuum

19. Which of the following is an example of a three-position actuator?

A. Recirculation door
B. None of these options
C. Blend door
D. Bi-level air door

20. Which of the following is not part of a rear air-conditioning system?

A. Rear heater core
B. Rear AC compressor
C. Rear blower motor
D. Rear evaporator

Answer 1

1 Evaporator
20 rear heater core
19 blend door

Answer 2

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Answer is
1. b
2. b
3. d
4. a
5. d
6. b
7. d
8. c
9. a
10. d
11. a
12. b
13. c
14. a
15. d