Question 1

Which of the following would NOT cause a low voltage fault?

Accepted Answer

A)  Defective charging system 
B)  Excessive electrical loads 
C)  High refrigerant pressure 
D)  Discharged or defective batteries 
A)  Defective charging system 
B)  Excessive electrical loads 
C)  High refrigerant pressure 
D)  Discharged or defective batteries C

Question 2

Which of the following would NOT cause a high pressure fault?

Accepted Answer

A)  Fan drive failure 
B)  Evaporator blockage 
C)  Condenser blockage 
D)  Refrigerant overcharge 
A)  Fan drive failure 
B)  Evaporator blockage 
C)  Condenser blockage 
D)  Refrigerant overcharge B

Question 3

Which of the following could cause a fault code erratic TStat?

Accepted Answer

A)  Faulty thermostat 
B)  Faulty A/C ON switch 
C)  Intermittent connections in the wiring harness or connector 
D)  Any of the above could trigger an erratic TStat code 
A)  Faulty thermostat 
B)  Faulty A/C ON switch 
C)  Intermittent connections in the wiring harness or connector 
D)  Any of the above could trigger an erratic TStat code D

Question 4

An APAD CM-813 module does not deliver output signals to:

Accepted Answer

A)  The air conditioning compressor clutch 
B)  The fan (fan actuator) 
C)  The evaporator fan 
D)  The diagnostic LED's 
A)  The air conditioning compressor clutch 
B)  The fan (fan actuator) 
C)  The evaporator fan 
D)  The diagnostic LED's

Question 5

A dash message "low air" and the air conditioning compressor not engaging indicates the system air pressure is below:

Accepted Answer

A)  90 PSI 
B)  80 PSI 
C)  70 PSI 
D)  60 PSI 
A)  90 PSI 
B)  80 PSI 
C)  70 PSI 
D)  60 PSI

Question 6

Which of the following would NOT cause a high pressure switch open fault?

Accepted Answer

A)  A break in the wiring harness 
B)  An unseated connector 
C)  Refrigerant overcharge 
D)  Moisture intrusion into the connectors or switch 
A)  A break in the wiring harness 
B)  An unseated connector 
C)  Refrigerant overcharge 
D)  Moisture intrusion into the connectors or switch

Question 7

APAD or ACPU systems are designed to reduce maintenance costs associated with the HVAC system by:

Accepted Answer

A)  Controlling thermostat operation 
B)  Controlling compressor operation 
C)  Controlling thermostatic expansion valve operation 
D)  Controlling receiver drier operation 
A)  Controlling thermostat operation 
B)  Controlling compressor operation 
C)  Controlling thermostatic expansion valve operation 
D)  Controlling receiver drier operation

Question 8

How does the APAD and ACPU system lubricate the compressor and components all year long?

Accepted Answer

A)  They inject oil into the compressor inlet. 
B)  They engage the compressor for 15 seconds after start up. 
C)  They prevent the compressor from engaging in cold weather to keep all the oil within the compressor. 
D)  APAD and ACPU's have nothing to do with the lubrication of compressors or system components. 
A)  They inject oil into the compressor inlet. 
B)  They engage the compressor for 15 seconds after start up. 
C)  They prevent the compressor from engaging in cold weather to keep all the oil within the compressor. 
D)  APAD and ACPU's have nothing to do with the lubrication of compressors or system components.

Question 9

If you got a dash message "A/C SYST CLUTCH CIR SHORT" which component would you test?

Accepted Answer

A)  The wiring to the high pressure switch 
B)  The compressor ground circuit 
C)  The clutch coil 
D)  The clutch drive pulley 
A)  The wiring to the high pressure switch 
B)  The compressor ground circuit 
C)  The clutch coil 
D)  The clutch drive pulley

Question 10

APAD and ACPU relieves stress on the engine starting system by not allowing the compressor clutch to engage until the engine has been running for:

Accepted Answer

A)  5 seconds 
B)  10 seconds 
C)  15 seconds 
D)  20 seconds 
A)  5 seconds 
B)  10 seconds 
C)  15 seconds 
D)  20 seconds

Question 11

An air conditioning system battery voltage low fault indicates a voltage drop below:

Accepted Answer

A)  12 volts 
B)  11 volts 
C)  10 volts 
D)  9 volts 
A)  12 volts 
B)  11 volts 
C)  10 volts 
D)  9 volts

Question 12

How are blink codes cleared from a CM-813 module?

Accepted Answer

A)  Cycling the ignition switch 1 second on 1 second off for four consecutive cycles 
B)  Removing the negative ground cable from the vehicle battery 
C)  Self-clearing depending on how persistent the fault is 
D)  Both A and C are methods of clearing fault codes 
A)  Cycling the ignition switch 1 second on 1 second off for four consecutive cycles 
B)  Removing the negative ground cable from the vehicle battery 
C)  Self-clearing depending on how persistent the fault is 
D)  Both A and C are methods of clearing fault codes

Question 13

What is the possible cause for a dash message "No RPM message"?

Accepted Answer

A)  Engine RPM's are less than 600 
B)  Engine RPM's are less than 500 
C)  Engine RPM's are less than 400 
D)  Engine RPM's are less than 300 
A)  Engine RPM's are less than 600 
B)  Engine RPM's are less than 500 
C)  Engine RPM's are less than 400 
D)  Engine RPM's are less than 300

Question 14

An APAD CM-813 module does not receive input information from:

Accepted Answer

A)  The high pressure switch 
B)  The low pressure switch 
C)  The ECM fan relay 
D)  The cab thermostat 
A)  The high pressure switch 
B)  The low pressure switch 
C)  The ECM fan relay 
D)  The cab thermostat

Question 15

Which of the following could cause low pressure fault?

Accepted Answer

A)  Cold ambient temperature 
B)  Loss of refrigerant 
C)  Blockage in the evaporator 
D)  All of the above could cause a low pressure fault 
A)  Cold ambient temperature 
B)  Loss of refrigerant 
C)  Blockage in the evaporator 
D)  All of the above could cause a low pressure fault

Which of the following would NOT cause a low voltage fault?

Which of the following would NOT cause a high pressure fault?

Which of the following could cause a fault code erratic TStat?

An APAD CM-813 module does not deliver output signals to:

A dash message "low air" and the air conditioning compressor not engaging indicates the system air pressure is below:

Which of the following would NOT cause a high pressure switch open fault?

APAD or ACPU systems are designed to reduce maintenance costs associated with the HVAC system by:

How does the APAD and ACPU system lubricate the compressor and components all year long?

If you got a dash message "A/C SYST CLUTCH CIR SHORT" which component would you test?

APAD and ACPU relieves stress on the engine starting system by not allowing the compressor clutch to engage until the engine has been running for:

An air conditioning system battery voltage low fault indicates a voltage drop below:

How are blink codes cleared from a CM-813 module?

What is the possible cause for a dash message "No RPM message"?

An APAD CM-813 module does not receive input information from:

Which of the following could cause low pressure fault?

History of Hvac

Environmental and Safety Practices

Thermodynamics

Air Conditioning Components: Compressor, Condenser, and Receiver-Drier

Air-Conditioning Components: Metering Devices, Evaporator, Accumulator

Air Conditioning Systems

Service Procedures

Truck Engine Cooling Systems

Climate Controlsupplemental Truck Heatingcooling

Trouble Shooting

Coach Air Conditioning

Truck Trailer Refrigeration Equipment

Truck Trailer Refrigeration Components

Truck Trailer Refrigerant Flow Control

Truck Trailer Refrigeration Electrical Components

Truck Trailer Refrigeration Maintenance Procedures

Filters

Exam 11: Apadsacpu Air Conditioning Control Systems Air Conditioning Protection Unit

Which of the following would NOT cause a low voltage fault?

Which of the following would NOT cause a high pressure fault?

Which of the following could cause a fault code erratic TStat?

An APAD CM-813 module does not deliver output signals to:

A dash message "low air" and the air conditioning compressor not engaging indicates the system air pressure is below:

Which of the following would NOT cause a high pressure switch open fault?

APAD or ACPU systems are designed to reduce maintenance costs associated with the HVAC system by:

How does the APAD and ACPU system lubricate the compressor and components all year long?

If you got a dash message "A/C SYST CLUTCH CIR SHORT" which component would you test?

APAD and ACPU relieves stress on the engine starting system by not allowing the compressor clutch to engage until the engine has been running for:

An air conditioning system battery voltage low fault indicates a voltage drop below:

How are blink codes cleared from a CM-813 module?

What is the possible cause for a dash message "No RPM message"?

An APAD CM-813 module does not receive input information from:

Which of the following could cause low pressure fault?

History of Hvac

Environmental and Safety Practices

Thermodynamics

Air Conditioning Components: Compressor, Condenser, and Receiver-Drier

Air-Conditioning Components: Metering Devices, Evaporator, Accumulator

Air Conditioning Systems

Service Procedures

Truck Engine Cooling Systems

Climate Controlsupplemental Truck Heatingcooling

Trouble Shooting

Coach Air Conditioning

Truck Trailer Refrigeration Equipment

Truck Trailer Refrigeration Components

Truck Trailer Refrigerant Flow Control

Truck Trailer Refrigeration Electrical Components

Truck Trailer Refrigeration Maintenance Procedures

Filters