Question 1

Refrigerant vapors are lighter than air.

Accepted Answer

A) True 
 B)False

Question 2

During initial system evaluation an unknown refrigerant is identified.Which of the following should a technician do:

Accepted Answer

A)  Treat it as a contaminated refrigerant. 
B)  Purge it into the atmosphere 
C)  Treat it like R-12 and recover and recycle it. 
D)  Treat it like R-134a and recover and recycle it. 
A)  Treat it as a contaminated refrigerant. 
B)  Purge it into the atmosphere 
C)  Treat it like R-12 and recover and recycle it. 
D)  Treat it like R-134a and recover and recycle it.

Question 3

A leak may be marked by the presence of refrigeration oil.

Accepted Answer

A) True 
 B)False

Question 4

When the air conditioning system is operating,the suction line should feel hot to the touch.

Accepted Answer

A) True 
 B)False

Question 5

Technician A says the manifold and gauge set is an important diagnostic tool.Technician Bsays the manifold and gauge set is an important tool for evacuating and charging the system.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 6

While checking the compressor drive belt for proper tension,also check the belt for what other flaws?

Accepted Answer

The answer of While checking the compressor drive belt for...

Question 7

Many pieces of air conditioning service equipment can do all of the following,EXCEPT:

Accepted Answer

A)  refrigerant recovery. 
B)  refrigerant recycling. 
C)  refrigerant reclaiming. 
D)  system evacuation. 
A)  refrigerant recovery. 
B)  refrigerant recycling. 
C)  refrigerant reclaiming. 
D)  system evacuation.

Question 8

When the air conditioning system is operating,the discharge line should feel hot to the touch.

Accepted Answer

A) True 
 B)False

Question 9

An inoperative cooling fan may cause high head (high-side)pressure at what vehicle speeds?

Accepted Answer

A)  idle (vehicle not in motion) 
B)  slow 
C)  highway 
D)  both A and B 
A)  idle (vehicle not in motion) 
B)  slow 
C)  highway 
D)  both A and B

Question 10

Explain why leaks at the service ports are often missed.

Accepted Answer

The gauge manifold h

Question 11

Technician A says recycled refrigerant in portable storage containers should be periodically shecked for noncondensable gas contamination.Technician B says contaminated refrigerant will not affect system performance..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

Refrigerant vapors are lighter than air.

During initial system evaluation an unknown refrigerant is identified.Which of the following should a technician do:

A leak may be marked by the presence of refrigeration oil.

When the air conditioning system is operating,the suction line should feel hot to the touch.

Technician A says the manifold and gauge set is an important diagnostic tool.Technician Bsays the manifold and gauge set is an important tool for evacuating and charging the system.Who is correct?

While checking the compressor drive belt for proper tension,also check the belt for what other flaws?

Many pieces of air conditioning service equipment can do all of the following,EXCEPT:

When the air conditioning system is operating,the discharge line should feel hot to the touch.

An inoperative cooling fan may cause high head (high-side)pressure at what vehicle speeds?

Explain why leaks at the service ports are often missed.

Technician A says recycled refrigerant in portable storage containers should be periodically shecked for noncondensable gas contamination.Technician B says contaminated refrigerant will not affect system performance..Who is correct?

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

Diagnosis of the Refrigeration System

Compressors and Clutches

Case and Duct Systems

System Controlsdiagnosis and Service of System Controls

Retrofit and Future Trends

Extenssion 1: Shop Safety

Extenssion 2: Typical Shop Procedures and Tools

Filters

Exam 6: Refrigerant System Servicing and Testingair-Conditioning System Servicing and Testing

Refrigerant vapors are lighter than air.

During initial system evaluation an unknown refrigerant is identified.Which of the following should a technician do:

A leak may be marked by the presence of refrigeration oil.

When the air conditioning system is operating,the suction line should feel hot to the touch.

Technician A says the manifold and gauge set is an important diagnostic tool.Technician Bsays the manifold and gauge set is an important tool for evacuating and charging the system.Who is correct?

While checking the compressor drive belt for proper tension,also check the belt for what other flaws?

Many pieces of air conditioning service equipment can do all of the following,EXCEPT:

When the air conditioning system is operating,the discharge line should feel hot to the touch.

An inoperative cooling fan may cause high head (high-side)pressure at what vehicle speeds?

Explain why leaks at the service ports are often missed.

Technician A says recycled refrigerant in portable storage containers should be periodically shecked for noncondensable gas contamination.Technician B says contaminated refrigerant will not affect system performance..Who is correct?

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

Diagnosis of the Refrigeration System

Compressors and Clutches

Case and Duct Systems

System Controlsdiagnosis and Service of System Controls

Retrofit and Future Trends

Extenssion 1: Shop Safety

Extenssion 2: Typical Shop Procedures and Tools

Filters