Question 1

In regards to the condenser what type of heat transfer takes place between the copper tubing and the aluminum fins?

Accepted Answer

A)  Conduction 
B)  Radiation 
C)  Convection 
D)  Sublimation 
A)  Conduction 
B)  Radiation 
C)  Convection 
D)  Sublimation A

Question 2

What prevents compressed refrigerant from traveling back into the compressor when the piston in on its suction stroke?

Accepted Answer

A)  Solenoid valve 
B)  Throttling valve 
C)  Discharge valve plate 
D)  Suction reed valve 
A)  Solenoid valve 
B)  Throttling valve 
C)  Discharge valve plate 
D)  Suction reed valve C

Question 3

What two components are connected to the distributor tube?

Accepted Answer

A)  The condenser and the TXV 
B)  The evaporator and the heat exchanger 
C)  The heat exchanger and the accumulator 
D)  The evaporator and the TXV 
A)  The condenser and the TXV 
B)  The evaporator and the heat exchanger 
C)  The heat exchanger and the accumulator 
D)  The evaporator and the TXV D

Question 4

Which of the following statements about the thermostatic expansion valve is NOT true?

Accepted Answer

A)  The TXV divides the high and low pressure sides of the refrigeration system. 
B)  The TXV monitors the temperature of the evaporator outlet to adjust flow accordingly. 
C)  The TXV uses an equalizer line to sense the pressure at the evaporator outlet. 
D)  If the TXV loses the pressure signal from the sensing bulb it will go to a full open mode to prevent the evaporator from starving. 
A)  The TXV divides the high and low pressure sides of the refrigeration system. 
B)  The TXV monitors the temperature of the evaporator outlet to adjust flow accordingly. 
C)  The TXV uses an equalizer line to sense the pressure at the evaporator outlet. 
D)  If the TXV loses the pressure signal from the sensing bulb it will go to a full open mode to prevent the evaporator from starving.

Question 5

What is used within the accumulator to prevent compressor oil from being trapped?

Accepted Answer

A)  The accumulator check valve 
B)  The accumulator service valve 
C)  The oil pick up hole 
D)  The anti-siphon hole 
A)  The accumulator check valve 
B)  The accumulator service valve 
C)  The oil pick up hole 
D)  The anti-siphon hole

Question 6

In regards to compressor operation:

Accepted Answer

A)  The compressor draws in refrigerant vapor and pumps our refrigerant liquid. 
B)  The compressor draws in liquid refrigerant from the evaporator and pumps out superheated refrigerant to the condenser. 
C)  The compressor draws in low pressure superheated refrigerant and pumps out high pressure superheated refrigerant. 
D)  The compressor draws in high pressure superheated vapor and pumps out low pressure superheated vapor. 
A)  The compressor draws in refrigerant vapor and pumps our refrigerant liquid. 
B)  The compressor draws in liquid refrigerant from the evaporator and pumps out superheated refrigerant to the condenser. 
C)  The compressor draws in low pressure superheated refrigerant and pumps out high pressure superheated refrigerant. 
D)  The compressor draws in high pressure superheated vapor and pumps out low pressure superheated vapor.

Question 7

Vibrasobers connect:

Accepted Answer

A)  The receiver tank to the drier. 
B)  The evaporator to the thermostatic expansion valve. 
C)  The condenser to the accumulator. 
D)  The compressor to the units copper piping. 
A)  The receiver tank to the drier. 
B)  The evaporator to the thermostatic expansion valve. 
C)  The condenser to the accumulator. 
D)  The compressor to the units copper piping.

Question 8

How is the outlet pressure adjusted on a suction throttling valve?

Accepted Answer

A)  Adjusting screw 
B)  Interchangeable springs 
C)  Shims behind the spring 
D)  Adjustment of the piston 
A)  Adjusting screw 
B)  Interchangeable springs 
C)  Shims behind the spring 
D)  Adjustment of the piston

Question 9

The main purpose of the receiver tank is:

Accepted Answer

A)  To subcool refrigerant. 
B)  To superheat refrigerant. 
C)  To store refrigerant. 
D)  To filter refrigerant. 
A)  To subcool refrigerant. 
B)  To superheat refrigerant. 
C)  To store refrigerant. 
D)  To filter refrigerant.

Question 10

If a compressor service valve is considered to be front seated:

Accepted Answer

A)  The valve blocks off the system from the compressor. 
B)  Blocks off the gauge port from system pressure. 
C)  Allows gauge port to deliver compressor pressure. 
D)  All the above statements are correct. 
A)  The valve blocks off the system from the compressor. 
B)  Blocks off the gauge port from system pressure. 
C)  Allows gauge port to deliver compressor pressure. 
D)  All the above statements are correct.

Question 11

In order to determine superheat what information is NOT required?

Accepted Answer

A)  The evaporator inlet temperature. 
B)  The evaporator outlet temperature. 
C)  The suction pressure. 
D)  The saturation temperature as determined from the refrigerant pressure temperature charts. 
A)  The evaporator inlet temperature. 
B)  The evaporator outlet temperature. 
C)  The suction pressure. 
D)  The saturation temperature as determined from the refrigerant pressure temperature charts.

Question 12

Incorporated into the receiver tank will be a:

Accepted Answer

A)  Service valve 
B)  Bypass check valve 
C)  Sight glass 
D)  All of the above will be part of the receiver tank assembly 
A)  Service valve 
B)  Bypass check valve 
C)  Sight glass 
D)  All of the above will be part of the receiver tank assembly

Question 13

The filter drier:

Accepted Answer

A)  Removes moisture from the refrigeration system 
B)  Filters out impurities 
C)  Contains a product called desiccant 
D)  All of the above are true of the drier 
A)  Removes moisture from the refrigeration system 
B)  Filters out impurities 
C)  Contains a product called desiccant 
D)  All of the above are true of the drier

Question 14

Which of the following statements about the heat exchanger is NOT true?

Accepted Answer

A)  It further subcools liquid refrigerant before entering the thermostatic expansion valve. 
B)  It adds heat to refrigerant that is returning to the accumulator. 
C)  It Increases operating efficiency by reducing the amount of flash gas produced as refrigerant flows through the thermostatic expansion valve. 
D)  It decreases the pressure of the suction gas. 
A)  It further subcools liquid refrigerant before entering the thermostatic expansion valve. 
B)  It adds heat to refrigerant that is returning to the accumulator. 
C)  It Increases operating efficiency by reducing the amount of flash gas produced as refrigerant flows through the thermostatic expansion valve. 
D)  It decreases the pressure of the suction gas.

Question 15

If suction pressure was too high what components would you check to determine if they were adjusted properly?

Accepted Answer

A)  Suction service valve and receiver tank service valve. 
B)  TXV and accumulator. 
C)  TXV and suction pressure regulator. 
D)  Safety valve and discharge regulator. 
A)  Suction service valve and receiver tank service valve. 
B)  TXV and accumulator. 
C)  TXV and suction pressure regulator. 
D)  Safety valve and discharge regulator.

In regards to the condenser what type of heat transfer takes place between the copper tubing and the aluminum fins?

What prevents compressed refrigerant from traveling back into the compressor when the piston in on its suction stroke?

What two components are connected to the distributor tube?

Which of the following statements about the thermostatic expansion valve is NOT true?

What is used within the accumulator to prevent compressor oil from being trapped?

In regards to compressor operation:

Vibrasobers connect:

How is the outlet pressure adjusted on a suction throttling valve?

The main purpose of the receiver tank is:

If a compressor service valve is considered to be front seated:

In order to determine superheat what information is NOT required?

Incorporated into the receiver tank will be a:

The filter drier:

Which of the following statements about the heat exchanger is NOT true?

If suction pressure was too high what components would you check to determine if they were adjusted properly?

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 Refrigerant Flow Control

Truck Trailer Refrigeration Electrical Components

Truck Trailer Refrigeration Maintenance Procedures

Filters

Exam 14: Truck Trailer Refrigeration Components

In regards to the condenser what type of heat transfer takes place between the copper tubing and the aluminum fins?

What prevents compressed refrigerant from traveling back into the compressor when the piston in on its suction stroke?

What two components are connected to the distributor tube?

Which of the following statements about the thermostatic expansion valve is NOT true?

What is used within the accumulator to prevent compressor oil from being trapped?

In regards to compressor operation:

Vibrasobers connect:

How is the outlet pressure adjusted on a suction throttling valve?

The main purpose of the receiver tank is:

If a compressor service valve is considered to be front seated:

In order to determine superheat what information is NOT required?

Incorporated into the receiver tank will be a:

The filter drier:

Which of the following statements about the heat exchanger is NOT true?

If suction pressure was too high what components would you check to determine if they were adjusted properly?

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 Refrigerant Flow Control

Truck Trailer Refrigeration Electrical Components

Truck Trailer Refrigeration Maintenance Procedures

Filters