Question 1

Which of the following should not be done when changing the engine fuel filters?

Accepted Answer

A)  Tighten the secondary fuel filter until the rubber gasket makes contact with the filter base; then tighten and additional half turn. 
B)  Install the primary fuel filter and spin it on, leaving the filter loose. 
C)  Fill both the primary and secondary filter with fuel before installation. 
D)  Operate the manual hand pump located on the injection pump until fuel bubbles surround the top of the primary filter. 
A)  Tighten the secondary fuel filter until the rubber gasket makes contact with the filter base; then tighten and additional half turn. 
B)  Install the primary fuel filter and spin it on, leaving the filter loose. 
C)  Fill both the primary and secondary filter with fuel before installation. 
D)  Operate the manual hand pump located on the injection pump until fuel bubbles surround the top of the primary filter. C

Question 2

Air filters should be replaced at regular intervals or when a restriction indicator shows that the air filter is restricted. Performing this task will prevent:

Accepted Answer

A)  A loss in horsepower. 
B)  Increased fuel consumption. 
C)  Shortened engine life. 
D)  All of the above can be prevented with proper air filter servicing. 
A)  A loss in horsepower. 
B)  Increased fuel consumption. 
C)  Shortened engine life. 
D)  All of the above can be prevented with proper air filter servicing. D

Question 3

Which of the following in not a recommended way to test engine glow plugs?

Accepted Answer

A)  Test amperage of entire glow plug circuit and compare to manufactures specifications. 
B)  Individually check the resistance of each glow plug and compare to manufactures specifications. 
C)  Check the voltage delivered to each glow plug and compare to manufactures specifications. 
D)  Test the amperage of each glow plug individually and compare to manufactures specifications. 
A)  Test amperage of entire glow plug circuit and compare to manufactures specifications. 
B)  Individually check the resistance of each glow plug and compare to manufactures specifications. 
C)  Check the voltage delivered to each glow plug and compare to manufactures specifications. 
D)  Test the amperage of each glow plug individually and compare to manufactures specifications. C

Question 4

A compressor pump down is performed in order to change the compressor oil. With the unit operating in high speed cool:

Accepted Answer

A)  Front seat the receiver tank outlet valve 
B)  Front seat the suction service valve 
C)  Front seat the discharge service valve 
D)  Front seat the bypass check valve 
A)  Front seat the receiver tank outlet valve 
B)  Front seat the suction service valve 
C)  Front seat the discharge service valve 
D)  Front seat the bypass check valve

Question 5

What is the recommended ratio of ethylene glycol based coolant and water for the engine cooling system?

Accepted Answer

A)  30/70 
B)  40/60 
C)  50/50 
D)  60/40 
A)  30/70 
B)  40/60 
C)  50/50 
D)  60/40

Question 6

What should be done before draining the engine oil of a refrigeration unit?

Accepted Answer

A)  Warm the engine to operating temperature 
B)  Ensure you have a drain pan capable of containing all the engine oil 
C)  Check the engine hour meter to make sure the unit has the required hours 
D)  All of the above should be performed before draining the engine oil 
A)  Warm the engine to operating temperature 
B)  Ensure you have a drain pan capable of containing all the engine oil 
C)  Check the engine hour meter to make sure the unit has the required hours 
D)  All of the above should be performed before draining the engine oil

Question 7

When manually recharging a refrigeration system start by performing a proper evacuation and then weigh in the correct amount of refrigerant by:

Accepted Answer

A)  Dispensing vaporous refrigerant into the discharge side of the system 
B)  Dispensing vaporous refrigerant into the suction side of the system 
C)  Dispensing liquid refrigerant into the discharge side of the system 
D)  Dispensing liquid refrigerant into the suction side of the system 
A)  Dispensing vaporous refrigerant into the discharge side of the system 
B)  Dispensing vaporous refrigerant into the suction side of the system 
C)  Dispensing liquid refrigerant into the discharge side of the system 
D)  Dispensing liquid refrigerant into the suction side of the system

Question 8

What component initiates the end of the defrost cycle?

Accepted Answer

A)  The defrost air switch. 
B)  The air restriction indicator. 
C)  The thermostat. 
D)  The defrost termination switch. 
A)  The defrost air switch. 
B)  The air restriction indicator. 
C)  The thermostat. 
D)  The defrost termination switch.

Question 9

When removing the manifold gauge set with the engine running never:

Accepted Answer

A)  Back seat the discharge service valve 
B)  Front seat the discharge service valve 
C)  Open both manifold gauges to bleed refrigerant from the discharge gauge hose into the compressor suction side 
D)  Back seat the suction service valve 
A)  Back seat the discharge service valve 
B)  Front seat the discharge service valve 
C)  Open both manifold gauges to bleed refrigerant from the discharge gauge hose into the compressor suction side 
D)  Back seat the suction service valve

Question 10

Before installing a manifold gauge set on a refrigeration unit make sure:

Accepted Answer

A)  The service valves are back seated 
B)  The service valves are mid seated 
C)  The service valves are mid seated   turn clockwise 
D)  The service valves are front seated 
A)  The service valves are back seated 
B)  The service valves are mid seated 
C)  The service valves are mid seated   turn clockwise 
D)  The service valves are front seated

Question 11

Why is it recommended to evacuate from three points on a solenoid control system (Carrier)?

Accepted Answer

A)  Because the system is larger 
B)  Because of the discharge check valve 
C)  Because of the closed SV2 solenoid valve 
D)  Because of the closed pilot solenoid valve 
A)  Because the system is larger 
B)  Because of the discharge check valve 
C)  Because of the closed SV2 solenoid valve 
D)  Because of the closed pilot solenoid valve

Question 12

The defrost air switch initiates a defrost cycle buy comparing:

Accepted Answer

A)  The differential air pressure on either side of the condenser fan. 
B)  The difference in air pressure between the condenser inlet and evaporator outlet. 
C)  The difference in air pressure between the condenser outlet and evaporator inlet. 
D)  The differential air pressure in either side of the evaporator coil. 
A)  The differential air pressure on either side of the condenser fan. 
B)  The difference in air pressure between the condenser inlet and evaporator outlet. 
C)  The difference in air pressure between the condenser outlet and evaporator inlet. 
D)  The differential air pressure in either side of the evaporator coil.

Question 13

In order to perform refrigerant maintenance on the low side of the refrigeration system you will need to perform a low side pump down. With the unit running in high speed cool:

Accepted Answer

A)  Front seat the receiver tank outlet valve 
B)  Front seat the suction service valve 
C)  Front seat the discharge service valve 
D)  Front seat the bypass check valve 
A)  Front seat the receiver tank outlet valve 
B)  Front seat the suction service valve 
C)  Front seat the discharge service valve 
D)  Front seat the bypass check valve

Question 14

What procedure would be used to repair the internal valve of SV2 on a solenoid control system (Carrier)?

Accepted Answer

A)  A compressor pump down 
B)  A low side pump down 
C)  A evacuation procedure 
D)  A refrigerant removal 
A)  A compressor pump down 
B)  A low side pump down 
C)  A evacuation procedure 
D)  A refrigerant removal

Question 15

How often should the refrigeration units cooling system be flushed and replaced?

Accepted Answer

A)  Every year 
B)  Every 2 years 
C)  Every 3 years 
D)  Every 4 years 
A)  Every year 
B)  Every 2 years 
C)  Every 3 years 
D)  Every 4 years

Which of the following should not be done when changing the engine fuel filters?

Air filters should be replaced at regular intervals or when a restriction indicator shows that the air filter is restricted. Performing this task will prevent:

Which of the following in not a recommended way to test engine glow plugs?

A compressor pump down is performed in order to change the compressor oil. With the unit operating in high speed cool:

What is the recommended ratio of ethylene glycol based coolant and water for the engine cooling system?

What should be done before draining the engine oil of a refrigeration unit?

When manually recharging a refrigeration system start by performing a proper evacuation and then weigh in the correct amount of refrigerant by:

What component initiates the end of the defrost cycle?

When removing the manifold gauge set with the engine running never:

Before installing a manifold gauge set on a refrigeration unit make sure:

Why is it recommended to evacuate from three points on a solenoid control system (Carrier)?

The defrost air switch initiates a defrost cycle buy comparing:

In order to perform refrigerant maintenance on the low side of the refrigeration system you will need to perform a low side pump down. With the unit running in high speed cool:

What procedure would be used to repair the internal valve of SV2 on a solenoid control system (Carrier)?

How often should the refrigeration units cooling system be flushed and replaced?

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

Apadsacpu Air Conditioning Control Systems Air Conditioning Protection Unit

Coach Air Conditioning

Truck Trailer Refrigeration Equipment

Truck Trailer Refrigeration Components

Truck Trailer Refrigerant Flow Control

Truck Trailer Refrigeration Electrical Components

Filters

Exam 17: Truck Trailer Refrigeration Maintenance Procedures

Which of the following should not be done when changing the engine fuel filters?

Air filters should be replaced at regular intervals or when a restriction indicator shows that the air filter is restricted. Performing this task will prevent:

Which of the following in not a recommended way to test engine glow plugs?

A compressor pump down is performed in order to change the compressor oil. With the unit operating in high speed cool:

What is the recommended ratio of ethylene glycol based coolant and water for the engine cooling system?

What should be done before draining the engine oil of a refrigeration unit?

When manually recharging a refrigeration system start by performing a proper evacuation and then weigh in the correct amount of refrigerant by:

What component initiates the end of the defrost cycle?

When removing the manifold gauge set with the engine running never:

Before installing a manifold gauge set on a refrigeration unit make sure:

Why is it recommended to evacuate from three points on a solenoid control system (Carrier)?

The defrost air switch initiates a defrost cycle buy comparing:

In order to perform refrigerant maintenance on the low side of the refrigeration system you will need to perform a low side pump down. With the unit running in high speed cool:

What procedure would be used to repair the internal valve of SV2 on a solenoid control system (Carrier)?

How often should the refrigeration units cooling system be flushed and replaced?

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

Apadsacpu Air Conditioning Control Systems Air Conditioning Protection Unit

Coach Air Conditioning

Truck Trailer Refrigeration Equipment

Truck Trailer Refrigeration Components

Truck Trailer Refrigerant Flow Control

Truck Trailer Refrigeration Electrical Components

Filters