Question 1

Under the CAA,anyone performing repairs to a motor vehicle air conditioning system for pay must

Accepted Answer

A)  be certified. 
B)  use recovery/recycle equipment. 
C)  be a salaried employee of the shop. 
D)  a and b. 
A)  be certified. 
B)  use recovery/recycle equipment. 
C)  be a salaried employee of the shop. 
D)  a and b. D

Question 2

Retrofits are being discussed.Technician A says the procedure involves replacing the refrigerant.Technician B says new service fittings must be installed.Who is correct?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A only 
B)  Technician B only 
C)  Both A and B 
D)  Neither A nor B C

Question 3

Which of the following desiccants should be used with HFC-134a refrigerant?

Accepted Answer

A)  XH5 
B)  XH7 
C)  XH9 
D)  b and c 
A)  XH5 
B)  XH7 
C)  XH9 
D)  b and c D

Question 4

When should a saddle clamp access valve be installed?

Accepted Answer

When tight clearance

Question 5

Which of the following desiccants should be used with HFC-134a refrigerant?

Accepted Answer

A)  XH5 
B)  XH7 
C)  XH9 
D)  Both B and C 
A)  XH5 
B)  XH7 
C)  XH9 
D)  Both B and C

Question 6

What is the advantage of placing the vehicle in a draft-free work area?

Accepted Answer

The location is an a

Question 7

Technician A says mineral oil is compatible with R-12.Technician B says mineral oil is compatible with R-134a.Who is correct?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A only 
B)  Technician B only 
C)  Both A and B 
D)  Neither A nor B

Question 8

Technician A says mixing two different refrigerants in an air conditioning system is not considered contamination.Technician B says air in an air conditioning system will cause contamination.Who is correct?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A only 
B)  Technician B only 
C)  Both A and B 
D)  Neither A nor B

Question 9

Under what conditions should system oil be charged directly into the compressor?

Accepted Answer

If the sys

Question 10

The concern in the world community has shifted from the threat of ozone-depleting chemicals to a concern over which of the following?

Accepted Answer

A)  Global weather 
B)  Global disaster 
C)  Global cooling 
D)  Global warming 
A)  Global weather 
B)  Global disaster 
C)  Global cooling 
D)  Global warming

Question 11

Under what conditions should hoses be replaced during a retrofit?

Accepted Answer

When they are the no

Question 12

The Clean Air Act of 1990 says after July 1,1992,which of the following refrigerants may be intentionally vented?

Accepted Answer

A)  R-12 
B)  R-134a 
C)  R-22 
D)  None of the above 
A)  R-12 
B)  R-134a 
C)  R-22 
D)  None of the above

Question 13

All of the following statements about system evacuation are true,EXCEPT:

Accepted Answer

A)  All systems should be evacuated for a minimum of 30 minutes. 
B)  Vacuum should reach at least 24 to 26 inHg (20.3 to 23.5 kPa absolute) in the first 15 minutes. 
C)  If vacuum does not reach 24 to 26 inHg (20.3 to 23.5 kPa absolute), evacuate for a longer time. 
D)  The longer the evacuation period, the better the moisture removal. 
A)  All systems should be evacuated for a minimum of 30 minutes. 
B)  Vacuum should reach at least 24 to 26 inHg (20.3 to 23.5 kPa absolute) in the first 15 minutes. 
C)  If vacuum does not reach 24 to 26 inHg (20.3 to 23.5 kPa absolute), evacuate for a longer time. 
D)  The longer the evacuation period, the better the moisture removal.

Question 14

Why is it important to affix decals to identify a new refrigerant type?

Accepted Answer

To prevent

Question 15

When should an air conditioning system be evacuated?

Accepted Answer

Whenever service pro

Question 16

Why should the technician rotate the clutch armature several revolutions by hand during charging?

Accepted Answer

To ensure that no li

Question 17

Technician A says after the retrofit is complete,a function test should be made.Technician B says system pressures and temperatures for HFC-134a should be the same as for CFC-12.Who is correct?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A only 
B)  Technician B only 
C)  Both A and B 
D)  Neither A nor B

Question 18

Three refrigerants are currently approved by the EPA for automotive use to replace R-12.

Accepted Answer

A) True 
 B)False

Question 19

A purity test should be held any time there is a concern about the quality of the refrigerant in the system.

Accepted Answer

A) True 
 B)False

Question 20

All of the following are removed when the air conditioner is evacuated,EXCEPT:

Accepted Answer

A)  refrigerant. 
B)  oil. 
C)  moisture. 
D)  All of the above are removed. 
A)  refrigerant. 
B)  oil. 
C)  moisture. 
D)  All of the above are removed.

Under the CAA,anyone performing repairs to a motor vehicle air conditioning system for pay must

Retrofits are being discussed.Technician A says the procedure involves replacing the refrigerant.Technician B says new service fittings must be installed.Who is correct?

Which of the following desiccants should be used with HFC-134a refrigerant?

When should a saddle clamp access valve be installed?

Which of the following desiccants should be used with HFC-134a refrigerant?

What is the advantage of placing the vehicle in a draft-free work area?

Technician A says mineral oil is compatible with R-12.Technician B says mineral oil is compatible with R-134a.Who is correct?

Technician A says mixing two different refrigerants in an air conditioning system is not considered contamination.Technician B says air in an air conditioning system will cause contamination.Who is correct?

Under what conditions should system oil be charged directly into the compressor?

The concern in the world community has shifted from the threat of ozone-depleting chemicals to a concern over which of the following?

Under what conditions should hoses be replaced during a retrofit?

The Clean Air Act of 1990 says after July 1,1992,which of the following refrigerants may be intentionally vented?

All of the following statements about system evacuation are true,EXCEPT:

Why is it important to affix decals to identify a new refrigerant type?

When should an air conditioning system be evacuated?

Why should the technician rotate the clutch armature several revolutions by hand during charging?

Technician A says after the retrofit is complete,a function test should be made.Technician B says system pressures and temperatures for HFC-134a should be the same as for CFC-12.Who is correct?

Three refrigerants are currently approved by the EPA for automotive use to replace R-12.

A purity test should be held any time there is a concern about the quality of the refrigerant in the system.

All of the following are removed when the air conditioner is evacuated,EXCEPT:

Heating and Air Conditioning - History and the Environment

Temperature and Pressure Fundamentals

Engine Cooling and Comfort Heating Systemsdiagnosis and Service of Engine Cooling and Comfort Heating Systems

Air-Conditioning System Operating Principlesthe Manifold and Gauge Set

Refrigerant System Componentsservicing System Components

Refrigerant System Servicing and Testingair-Conditioning System Servicing and Testing

Diagnosis of the Refrigeration System

Compressors and Clutches

Case and Duct Systems

System Controlsdiagnosis and Service of System Controls

Extenssion 1: Shop Safety

Extenssion 2: Typical Shop Procedures and Tools

Filters

Exam 11: Retrofit and Future Trends

Under the CAA,anyone performing repairs to a motor vehicle air conditioning system for pay must

Retrofits are being discussed.Technician A says the procedure involves replacing the refrigerant.Technician B says new service fittings must be installed.Who is correct?

Which of the following desiccants should be used with HFC-134a refrigerant?

When should a saddle clamp access valve be installed?

Which of the following desiccants should be used with HFC-134a refrigerant?

What is the advantage of placing the vehicle in a draft-free work area?

Technician A says mineral oil is compatible with R-12.Technician B says mineral oil is compatible with R-134a.Who is correct?

Technician A says mixing two different refrigerants in an air conditioning system is not considered contamination.Technician B says air in an air conditioning system will cause contamination.Who is correct?

Under what conditions should system oil be charged directly into the compressor?

The concern in the world community has shifted from the threat of ozone-depleting chemicals to a concern over which of the following?

Under what conditions should hoses be replaced during a retrofit?

The Clean Air Act of 1990 says after July 1,1992,which of the following refrigerants may be intentionally vented?

All of the following statements about system evacuation are true,EXCEPT:

Why is it important to affix decals to identify a new refrigerant type?

When should an air conditioning system be evacuated?

Why should the technician rotate the clutch armature several revolutions by hand during charging?

Technician A says after the retrofit is complete,a function test should be made.Technician B says system pressures and temperatures for HFC-134a should be the same as for CFC-12.Who is correct?

Three refrigerants are currently approved by the EPA for automotive use to replace R-12.

A purity test should be held any time there is a concern about the quality of the refrigerant in the system.

All of the following are removed when the air conditioner is evacuated,EXCEPT:

Heating and Air Conditioning - History and the Environment

Temperature and Pressure Fundamentals

Engine Cooling and Comfort Heating Systemsdiagnosis and Service of Engine Cooling and Comfort Heating Systems

Air-Conditioning System Operating Principlesthe Manifold and Gauge Set

Refrigerant System Componentsservicing System Components

Refrigerant System Servicing and Testingair-Conditioning System Servicing and Testing

Diagnosis of the Refrigeration System

Compressors and Clutches

Case and Duct Systems

System Controlsdiagnosis and Service of System Controls

Extenssion 1: Shop Safety

Extenssion 2: Typical Shop Procedures and Tools

Filters