Question 1

How many refrigerant check valves are used on the solenoid control refrigeration system?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4 B

Question 2

When any refrigeration unit is in the heat mode of operation the flow of refrigerant is:

Accepted Answer

A)  From the compressor discharge to the evaporator 
B)  From the compressor discharge to the condenser 
C)  From the compressor discharge to the heat exchanger 
D)  From the compressor discharge to the accumulator 
A)  From the compressor discharge to the evaporator 
B)  From the compressor discharge to the condenser 
C)  From the compressor discharge to the heat exchanger 
D)  From the compressor discharge to the accumulator A

Question 3

How is refrigerant forced from the receiver tank in the heat mode?

Accepted Answer

A)  It is pulled out by suction pressure 
B)  It is forced out by solenoid valve number 2 
C)  It is forced out by refrigerant that is forced through the bypass check valve 
D)  The receiver tank outlet valve closes forcing refrigerant for the receiver back through the bypass check valve 
A)  It is pulled out by suction pressure 
B)  It is forced out by solenoid valve number 2 
C)  It is forced out by refrigerant that is forced through the bypass check valve 
D)  The receiver tank outlet valve closes forcing refrigerant for the receiver back through the bypass check valve C

Question 4

Some solenoid systems us a component called a subcooler. What is the purpose of this component?

Accepted Answer

A)  To add more heat to the refrigerant. 
B)  To increase operating efficiency by reducing flash gas at the TXV. 
C)  To superheat the refrigerant. 
D)  To reduce the temperature of the engine coolant. 
A)  To add more heat to the refrigerant. 
B)  To increase operating efficiency by reducing flash gas at the TXV. 
C)  To superheat the refrigerant. 
D)  To reduce the temperature of the engine coolant.

Question 5

Where is the 3-way valve located?

Accepted Answer

A)  Just downstream of the condenser 
B)  Just downstream of the drier 
C)  Just downstream of the discharge vibrasorber 
D)  Just downstream of the evaporator 
A)  Just downstream of the condenser 
B)  Just downstream of the drier 
C)  Just downstream of the discharge vibrasorber 
D)  Just downstream of the evaporator

Question 6

The large spring contained in the 3-way valve will always try to shift the valve:

Accepted Answer

A)  To the cool position 
B)  To the heat position 
C)  To the defrost position 
D)  To the high speed heat mode 
A)  To the cool position 
B)  To the heat position 
C)  To the defrost position 
D)  To the high speed heat mode

Question 7

What is the purpose of the condenser pressure bypass valve?

Accepted Answer

A)  To increase condenser pressure. 
B)  To ensure condenser pressure does not exceed discharge pressure. 
C)  To allow refrigerant to flow through the bleed passage and through to the pilot solenoid. 
D)  To help the 3-way valve shift into the heat mode. 
A)  To increase condenser pressure. 
B)  To ensure condenser pressure does not exceed discharge pressure. 
C)  To allow refrigerant to flow through the bleed passage and through to the pilot solenoid. 
D)  To help the 3-way valve shift into the heat mode.

Question 8

When the solenoid control system is in the heat mode what component helps to control the discharge pressure?

Accepted Answer

A)  The quench valve 
B)  The high pressure switch working with solenoid valve number 2 
C)  The bypass check valve 
D)  Both components in answers A and B help to control compressor discharge pressure 
A)  The quench valve 
B)  The high pressure switch working with solenoid valve number 2 
C)  The bypass check valve 
D)  Both components in answers A and B help to control compressor discharge pressure

Question 9

A solenoid control system may use a component called a quench valve. What is the purpose of this valve?

Accepted Answer

A)  To increase refrigerant discharge pressure. 
B)  To increase refrigerant suction pressure. 
C)  To cool the compressor. 
D)  To help the system operate more efficiently. 
A)  To increase refrigerant discharge pressure. 
B)  To increase refrigerant suction pressure. 
C)  To cool the compressor. 
D)  To help the system operate more efficiently.

Question 10

What valve causes the 3-way valve to shift into the heating position?

Accepted Answer

A)  The solenoid valve number 1 
B)  The solenoid valve number 3 
C)  The pilot solenoid valve 
D)  The discharge check valve 
A)  The solenoid valve number 1 
B)  The solenoid valve number 3 
C)  The pilot solenoid valve 
D)  The discharge check valve

Question 11

In what mode of operation is the pilot solenoid not energized?

Accepted Answer

A)  The low speed heat mode 
B)  The low speed cool mode 
C)  The defrost mode 
D)  The high speed heat mode 
A)  The low speed heat mode 
B)  The low speed cool mode 
C)  The defrost mode 
D)  The high speed heat mode

Question 12

In reference to the solenoid control refrigeration system what condition and state is the refrigerant in when it is forced through the bypass check valve?

Accepted Answer

A)  High pressure superheated refrigerant 
B)  Low pressure subcooled refrigerant 
C)  High pressure subcooled refrigerant 
D)  Low pressure superheated refrigerant 
A)  High pressure superheated refrigerant 
B)  Low pressure subcooled refrigerant 
C)  High pressure subcooled refrigerant 
D)  Low pressure superheated refrigerant

Question 13

What happens when the 3-way valve shifts into the heat position?

Accepted Answer

A)  The pilot solenoid valve is de-energized and the refrigerant pressure in the end cap is reduced to compressor suction pressure. 
B)  The pilot solenoid valve is energized and the refrigerant pressure in the end cap is reduced to compressor suction pressure. 
C)  The spool valve inside the 3-way valve shifts to seal the evaporator side. 
D)  Superheated refrigerant is routed directly into the condenser. 
A)  The pilot solenoid valve is de-energized and the refrigerant pressure in the end cap is reduced to compressor suction pressure. 
B)  The pilot solenoid valve is energized and the refrigerant pressure in the end cap is reduced to compressor suction pressure. 
C)  The spool valve inside the 3-way valve shifts to seal the evaporator side. 
D)  Superheated refrigerant is routed directly into the condenser.

Question 14

Check valves are used in the refrigeration system to route refrigerant in only one direction. On the refrigeration system that uses the 3-way valve how may check valves are used within the system?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 15

How does refrigerant enter the end cap section of the 3-way valve in the cool mode?

Accepted Answer

A)  Through the pilot solenoid 
B)  Through the condenser pressure bypass check valve 
C)  Through the bleed passage 
D)  Through the discharge check valve 
A)  Through the pilot solenoid 
B)  Through the condenser pressure bypass check valve 
C)  Through the bleed passage 
D)  Through the discharge check valve

How many refrigerant check valves are used on the solenoid control refrigeration system?

When any refrigeration unit is in the heat mode of operation the flow of refrigerant is:

How is refrigerant forced from the receiver tank in the heat mode?

Some solenoid systems us a component called a subcooler. What is the purpose of this component?

Where is the 3-way valve located?

The large spring contained in the 3-way valve will always try to shift the valve:

What is the purpose of the condenser pressure bypass valve?

When the solenoid control system is in the heat mode what component helps to control the discharge pressure?

A solenoid control system may use a component called a quench valve. What is the purpose of this valve?

What valve causes the 3-way valve to shift into the heating position?

In what mode of operation is the pilot solenoid not energized?

In reference to the solenoid control refrigeration system what condition and state is the refrigerant in when it is forced through the bypass check valve?

What happens when the 3-way valve shifts into the heat position?

Check valves are used in the refrigeration system to route refrigerant in only one direction. On the refrigeration system that uses the 3-way valve how may check valves are used within the system?

How does refrigerant enter the end cap section of the 3-way valve in the cool mode?

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 Refrigeration Electrical Components

Truck Trailer Refrigeration Maintenance Procedures

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Exam 15: Truck Trailer Refrigerant Flow Control

How many refrigerant check valves are used on the solenoid control refrigeration system?

When any refrigeration unit is in the heat mode of operation the flow of refrigerant is:

How is refrigerant forced from the receiver tank in the heat mode?

Some solenoid systems us a component called a subcooler. What is the purpose of this component?

Where is the 3-way valve located?

The large spring contained in the 3-way valve will always try to shift the valve:

What is the purpose of the condenser pressure bypass valve?

When the solenoid control system is in the heat mode what component helps to control the discharge pressure?

A solenoid control system may use a component called a quench valve. What is the purpose of this valve?

What valve causes the 3-way valve to shift into the heating position?

In what mode of operation is the pilot solenoid not energized?

In reference to the solenoid control refrigeration system what condition and state is the refrigerant in when it is forced through the bypass check valve?

What happens when the 3-way valve shifts into the heat position?

Check valves are used in the refrigeration system to route refrigerant in only one direction. On the refrigeration system that uses the 3-way valve how may check valves are used within the system?

How does refrigerant enter the end cap section of the 3-way valve in the cool mode?

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 Refrigeration Electrical Components

Truck Trailer Refrigeration Maintenance Procedures

Filters