Question 1

The stepped resistor blower speed control has four or five speed positions.

Accepted Answer

A) True 
 B)False

Question 2

The ambient air temperature sensor monitors the temperature of the outside air.

Accepted Answer

A) True 
 B)False

Question 3

Name four methods of temperature control used on modern air conditioning systems.

Accepted Answer

Thermostat,pressure

Question 4

What is the purpose of the air conditioner control panel?

Accepted Answer

To provide driver co

Question 5

Air conditioning is not generally required at temperatures below 50°F (10°C).

Accepted Answer

A) True 
 B)False

Question 6

The temperature fluctuates between hot and cold on a vehicle equipped with an automatic temperature control system.Which of the following is the most likely cause?

Accepted Answer

A)  A open blower motor control relay. 
B)  A low refrigerant charge level. 
C)  A faulty coolant temperature sensor. 
D)  A disconnected in-car temperature sensor aspirator tube. 
A)  A open blower motor control relay. 
B)  A low refrigerant charge level. 
C)  A faulty coolant temperature sensor. 
D)  A disconnected in-car temperature sensor aspirator tube.

Question 7

What is the relationship of the aspirator to the in-car temperature sensor?

Accepted Answer

The aspirator is a small duct system,arr

Question 8

How does the automatic temperature control regulate temperature?

Accepted Answer

The microprocessor used on an

Question 9

Why can the high- and low-side temperature switches be used to measure system pressures?

Accepted Answer

System temperature and system

Question 10

If blower motor speed control is provided by resistors,the motor will have three windings.

Accepted Answer

A) True 
 B)False

Question 11

Self-diagnostic systems display trouble areas as a code.

Accepted Answer

A) True 
 B)False

Question 12

The usual service problem with vacuum reserve tanks is

Accepted Answer

A)  leaks. 
B)  clogging. 
C)  moisture collection. 
D)  collapse. 
A)  leaks. 
B)  clogging. 
C)  moisture collection. 
D)  collapse.

Question 13

What is a blower motor power module?

Accepted Answer

The blower motor power module

Question 14

Technician A says the purpose of lthe pressure cutoff switch is evaporator temperature control.Technician B says the purpose of the pressure cutoff switch is system protection.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 15

Technician A says a four-speed blower motor control is a five-position switch.Technician B says all blower motors have several windings in the motor to assist in speed control.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 16

Technician A says before attempting to remove the blower motor resistor,ensure that it is not hot.Technician B says the blower motor may have a power module.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 17

-The blower motor in Figure  has blower motor speed M2,M3,and High speed.But does not run in either LOW or M1.Which of the faults listed below could be the cause:

Accepted Answer

A)  Faulty blower motor. 
B)  Faulty blower motor relay. 
C)  Faulty Heater A/C control assembly. 
D)  Faulty resistor block. 
A)  Faulty blower motor. 
B)  Faulty blower motor relay. 
C)  Faulty Heater A/C control assembly. 
D)  Faulty resistor block.

Question 18

A blower motor is being tested for resistance.Technician A says a higher than specified resistance would cause slower blower operation.Technician B says trash or other items could restrict the blower,causing motor resistance to go up during operation.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 19

An average rating of an air conditioning system fuse or circuit breaker is ____ amperes.

Accepted Answer

A)  10 to 20 
B)  15 to 25 
C)  20 to 30 
D)  30 to 100 
A)  10 to 20 
B)  15 to 25 
C)  20 to 30 
D)  30 to 100

Question 20

Explain how the internal circuits of a circuit breaker respond to an overload and how the breaker resets.

Accepted Answer

Excessive current produces heat that cau

The stepped resistor blower speed control has four or five speed positions.

The ambient air temperature sensor monitors the temperature of the outside air.

Name four methods of temperature control used on modern air conditioning systems.

What is the purpose of the air conditioner control panel?

Air conditioning is not generally required at temperatures below 50°F (10°C).

The temperature fluctuates between hot and cold on a vehicle equipped with an automatic temperature control system.Which of the following is the most likely cause?

What is the relationship of the aspirator to the in-car temperature sensor?

How does the automatic temperature control regulate temperature?

Why can the high- and low-side temperature switches be used to measure system pressures?

If blower motor speed control is provided by resistors,the motor will have three windings.

Self-diagnostic systems display trouble areas as a code.

The usual service problem with vacuum reserve tanks is

What is a blower motor power module?

Technician A says the purpose of lthe pressure cutoff switch is evaporator temperature control.Technician B says the purpose of the pressure cutoff switch is system protection.Who is correct?

Technician A says a four-speed blower motor control is a five-position switch.Technician B says all blower motors have several windings in the motor to assist in speed control.Who is correct?

Technician A says before attempting to remove the blower motor resistor,ensure that it is not hot.Technician B says the blower motor may have a power module.Who is correct?

-The blower motor in Figure has blower motor speed M2,M3,and High speed.But does not run in either LOW or M1.Which of the faults listed below could be the cause:

A blower motor is being tested for resistance.Technician A says a higher than specified resistance would cause slower blower operation.Technician B says trash or other items could restrict the blower,causing motor resistance to go up during operation.Who is correct?

An average rating of an air conditioning system fuse or circuit breaker is ____ amperes.

Explain how the internal circuits of a circuit breaker respond to an overload and how the breaker resets.

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

Retrofit and Future Trends

Extenssion 1: Shop Safety

Extenssion 2: Typical Shop Procedures and Tools

Filters

Exam 10: System Controlsdiagnosis and Service of System Controls

The stepped resistor blower speed control has four or five speed positions.

The ambient air temperature sensor monitors the temperature of the outside air.

Name four methods of temperature control used on modern air conditioning systems.

What is the purpose of the air conditioner control panel?

Air conditioning is not generally required at temperatures below 50°F (10°C).

The temperature fluctuates between hot and cold on a vehicle equipped with an automatic temperature control system.Which of the following is the most likely cause?

What is the relationship of the aspirator to the in-car temperature sensor?

How does the automatic temperature control regulate temperature?

Why can the high- and low-side temperature switches be used to measure system pressures?

If blower motor speed control is provided by resistors,the motor will have three windings.

Self-diagnostic systems display trouble areas as a code.

The usual service problem with vacuum reserve tanks is

What is a blower motor power module?

Technician A says the purpose of lthe pressure cutoff switch is evaporator temperature control.Technician B says the purpose of the pressure cutoff switch is system protection.Who is correct?

Technician A says a four-speed blower motor control is a five-position switch.Technician B says all blower motors have several windings in the motor to assist in speed control.Who is correct?

Technician A says before attempting to remove the blower motor resistor,ensure that it is not hot.Technician B says the blower motor may have a power module.Who is correct?

-The blower motor in Figure has blower motor speed M2,M3,and High speed.But does not run in either LOW or M1.Which of the faults listed below could be the cause:

A blower motor is being tested for resistance.Technician A says a higher than specified resistance would cause slower blower operation.Technician B says trash or other items could restrict the blower,causing motor resistance to go up during operation.Who is correct?

An average rating of an air conditioning system fuse or circuit breaker is ____ amperes.

Explain how the internal circuits of a circuit breaker respond to an overload and how the breaker resets.

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

Retrofit and Future Trends

Extenssion 1: Shop Safety

Extenssion 2: Typical Shop Procedures and Tools

Filters