Question 1

Describe what happens to the refrigerant within the evaporator.

Accepted Answer

Heat from the air flowing over the evapo

Question 2

What is meant by the term starved evaporator?

Accepted Answer

A starved evaporator is the re

Question 3

Why is the remote bulb of a thermostatic expansion valve attached with insulated tape to the refrigerant line?

Accepted Answer

To keep it

Question 4

Define heat load.

Accepted Answer

Heat load is the amo

Question 5

The EPA requires the replacement of hoses or seals during the retrofit of a vehicle from R-12 to R-134a.

Accepted Answer

A) True 
 B)False

Question 6

Describe the two major functions of the air conditioning system compressor.

Accepted Answer

To pressurize the re

Question 7

What is the function of the evaporator case drain vent?

Accepted Answer

During normal system operation,moisture

Question 8

The correct oil for use with R-134a is mineral oil.

Accepted Answer

A) True 
 B)False

Question 9

Refrigerant enters the compressor as a

Accepted Answer

A)  high-pressure vapor. 
B)  low-pressure vapor. 
C)  low-pressure liquid. 
D)  high-pressure liquid. 
A)  high-pressure vapor. 
B)  low-pressure vapor. 
C)  low-pressure liquid. 
D)  high-pressure liquid.

Question 10

If the refrigerant system is suspected of being contaminated with moisture what component should also be replaced?

Accepted Answer

If the refrigerant system is s

Question 11

Technician A says in an H-block valve the temperature sensing sleeve (bulb)is internally located in the outlet port of the valve.Technician B says the operation and function of the H-valve,or block valve,are essentially the same as the thermostatic expansion valve (TXV).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 12

Once the refrigerant from the air conditioning system has been recovered,which of the following should the technician do?

Accepted Answer

A)  Check the purity of the refrigerant in the recovery tank. 
B)  Change the recovery unit fiters. 
C)  Record the amount of refrigerant oil removed from the system. 
D)  Change the receiver-drier. 
A)  Check the purity of the refrigerant in the recovery tank. 
B)  Change the recovery unit fiters. 
C)  Record the amount of refrigerant oil removed from the system. 
D)  Change the receiver-drier.

Question 13

What effect will bent cooling fins on the condenser have on the refrigerant system?

Accepted Answer

The efficiency of th

Question 14

Before attempting to service an automotive air-conditioning system consider all of the following Except:

Accepted Answer

A)  Can customer afford the repair? 
B)  Do you have the proper tools and equipment to service the system? 
C)  Listen to customer complaint. 
D)  Does your diagnosis make sense based on customer complaint. 
A)  Can customer afford the repair? 
B)  Do you have the proper tools and equipment to service the system? 
C)  Listen to customer complaint. 
D)  Does your diagnosis make sense based on customer complaint.

Question 15

What is the purpose of the evaporator?

Accepted Answer

The purpose of the evaporator

Question 16

What is the function of the orifice tube?

Accepted Answer

The orifice tube establishes a

Question 17

What is a flooded evaporator and how does it occur? What are the results of this condition?

Accepted Answer

A flooded evaporator is the result of to

Question 18

The expansion valve regulates the evaporator temperature based on the thermal heat load it detects.

Accepted Answer

A) True 
 B)False

Question 19

A flooded evaporator can cause damage to the

Accepted Answer

A)  compressor. 
B)  condenser. 
C)  expansion valve. 
D)  receiver-drier. 
A)  compressor. 
B)  condenser. 
C)  expansion valve. 
D)  receiver-drier.

Question 20

Technician A says the amount of refrigerant flowing through an orifice tube is controlled by a remote sensing bulb.Technician B says the orifice tube is located in the liquid line between the condenser outlet and evaporator inlet.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

Describe what happens to the refrigerant within the evaporator.

What is meant by the term starved evaporator?

Why is the remote bulb of a thermostatic expansion valve attached with insulated tape to the refrigerant line?

Define heat load.

The EPA requires the replacement of hoses or seals during the retrofit of a vehicle from R-12 to R-134a.

Describe the two major functions of the air conditioning system compressor.

What is the function of the evaporator case drain vent?

The correct oil for use with R-134a is mineral oil.

Refrigerant enters the compressor as a

If the refrigerant system is suspected of being contaminated with moisture what component should also be replaced?

Technician A says in an H-block valve the temperature sensing sleeve (bulb)is internally located in the outlet port of the valve.Technician B says the operation and function of the H-valve,or block valve,are essentially the same as the thermostatic expansion valve (TXV).Who is correct?

Once the refrigerant from the air conditioning system has been recovered,which of the following should the technician do?

What effect will bent cooling fins on the condenser have on the refrigerant system?

Before attempting to service an automotive air-conditioning system consider all of the following Except:

What is the purpose of the evaporator?

What is the function of the orifice tube?

What is a flooded evaporator and how does it occur? What are the results of this condition?

The expansion valve regulates the evaporator temperature based on the thermal heat load it detects.

A flooded evaporator can cause damage to the

Technician A says the amount of refrigerant flowing through an orifice tube is controlled by a remote sensing bulb.Technician B says the orifice tube is located in the liquid line between the condenser outlet and evaporator inlet.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 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

Retrofit and Future Trends

Extenssion 1: Shop Safety

Extenssion 2: Typical Shop Procedures and Tools

Filters

Exam 5: Refrigerant System Componentsservicing System Components

Describe what happens to the refrigerant within the evaporator.

What is meant by the term starved evaporator?

Why is the remote bulb of a thermostatic expansion valve attached with insulated tape to the refrigerant line?

Define heat load.

The EPA requires the replacement of hoses or seals during the retrofit of a vehicle from R-12 to R-134a.

Describe the two major functions of the air conditioning system compressor.

What is the function of the evaporator case drain vent?

The correct oil for use with R-134a is mineral oil.

Refrigerant enters the compressor as a

If the refrigerant system is suspected of being contaminated with moisture what component should also be replaced?

Technician A says in an H-block valve the temperature sensing sleeve (bulb)is internally located in the outlet port of the valve.Technician B says the operation and function of the H-valve,or block valve,are essentially the same as the thermostatic expansion valve (TXV).Who is correct?

Once the refrigerant from the air conditioning system has been recovered,which of the following should the technician do?

What effect will bent cooling fins on the condenser have on the refrigerant system?

Before attempting to service an automotive air-conditioning system consider all of the following Except:

What is the purpose of the evaporator?

What is the function of the orifice tube?

What is a flooded evaporator and how does it occur? What are the results of this condition?

The expansion valve regulates the evaporator temperature based on the thermal heat load it detects.

A flooded evaporator can cause damage to the

Technician A says the amount of refrigerant flowing through an orifice tube is controlled by a remote sensing bulb.Technician B says the orifice tube is located in the liquid line between the condenser outlet and evaporator inlet.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 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

Retrofit and Future Trends

Extenssion 1: Shop Safety

Extenssion 2: Typical Shop Procedures and Tools

Filters