Question 1

The refrigeration unit thermostat will not:

Accepted Answer

A)  Establish the switching point between heating and cooling cycles. 
B)  Establish the switching point between high speed and low speed. 
C)  Monitor the box temperature of the vehicle. 
D)  Maintain the engine temperature. 
A)  Establish the switching point between heating and cooling cycles. 
B)  Establish the switching point between high speed and low speed. 
C)  Monitor the box temperature of the vehicle. 
D)  Maintain the engine temperature. D

Question 2

Unlike a standard van trailer a reefer trailer is constructed with insulation in the floors, walls, ceiling, and doors. Insulating properties are also known as:

Accepted Answer

A)  Insulators 
B)  Resilient 
C)  "R" value 
D)  Rigid value 
A)  Insulators 
B)  Resilient 
C)  "R" value 
D)  Rigid value C

Question 3

A multi-temperature refrigeration unit does not share a common:

Accepted Answer

A)  Condenser 
B)  Evaporator 
C)  Compressor 
D)  Drive engine 
A)  Condenser 
B)  Evaporator 
C)  Compressor 
D)  Drive engine B

Question 4

When a refrigeration unit starts short cycling because the trailer has been improperly loaded what component is tricked into thinking the temperature within the controlled space is sufficient?

Accepted Answer

A)  The box temperature 
B)  The thermostat 
C)  The evaporator inlet temperature sensor 
D)  The evaporator outlet temperature sensor 
A)  The box temperature 
B)  The thermostat 
C)  The evaporator inlet temperature sensor 
D)  The evaporator outlet temperature sensor

Question 5

What refrigerant is currently being used in refrigeration equipment?

Accepted Answer

A)  R-12 and R-404a 
B)  R-22 and R-502 
C)  R-134a and R-12 
D)  R-134a and R-404a 
A)  R-12 and R-404a 
B)  R-22 and R-502 
C)  R-134a and R-12 
D)  R-134a and R-404a

Question 6

When a trailer is loaded, what is the minimum recommended spacing between the product and the roof?

Accepted Answer

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

Question 7

What directs the flow of air from the evaporator throughout the trailer?

Accepted Answer

A)  The evaporator fan. 
B)  The chute. 
C)  The reefer floor ducting. 
D)  Both B and C direct air flow . 
A)  The evaporator fan. 
B)  The chute. 
C)  The reefer floor ducting. 
D)  Both B and C direct air flow .

Question 8

Why is a reefer floor manufactured in a corrugated design?

Accepted Answer

A)  To make the trailer lighter. 
B)  To make the floor stronger. 
C)  To allow for air flow underneath the product. 
D)  To give fork trucks better traction. 
A)  To make the trailer lighter. 
B)  To make the floor stronger. 
C)  To allow for air flow underneath the product. 
D)  To give fork trucks better traction.

Question 9

The job of the condenser is:

Accepted Answer

A)  To heat refrigerant 
B)  To remove heat from the controlled space 
C)  Cool the controlled space 
D)  Heat the controlled space 
A)  To heat refrigerant 
B)  To remove heat from the controlled space 
C)  Cool the controlled space 
D)  Heat the controlled space

Question 10

Even if a refrigeration unit is operating properly a load can still spoil due to:

Accepted Answer

A)  A load that was not precooled 
B)  A trailer with poor insulation 
C)  Improperly loaded trailer 
D)  All of the above can cause the load to spoil 
A)  A load that was not precooled 
B)  A trailer with poor insulation 
C)  Improperly loaded trailer 
D)  All of the above can cause the load to spoil

Question 11

Why is it necessary to precool the product before loading?

Accepted Answer

A)  To prevent the product from spoiling. 
B)  To ensure the unit can achieve the set point. 
C)  Because the unit does not have the refrigeration capacity to cool the product only maintain the temperature. 
D)  All of the above are reasons to precool the product 
A)  To prevent the product from spoiling. 
B)  To ensure the unit can achieve the set point. 
C)  Because the unit does not have the refrigeration capacity to cool the product only maintain the temperature. 
D)  All of the above are reasons to precool the product

Question 12

What component dissipates the heat from the controlled space?

Accepted Answer

A)  The evaporator 
B)  The condenser 
C)  The compressor 
D)  The thermostatic expansion valve 
A)  The evaporator 
B)  The condenser 
C)  The compressor 
D)  The thermostatic expansion valve

Question 13

What component controls engine high or low speed operation?

Accepted Answer

A)  The thermostatic expansion valve. 
B)  The thermostat. 
C)  The set point. 
D)  The engine control module. 
A)  The thermostatic expansion valve. 
B)  The thermostat. 
C)  The set point. 
D)  The engine control module.

Question 14

When a unit is run in the auto stop/start mode and has automatically shut off what will trigger the unit to restart?

Accepted Answer

A)  Box temperature rises a predetermined amount 
B)  Maximum off time limit has been reached 
C)  Engine block temperature falls below a predetermined temperature 
D)  Any of the above will initiate a restart 
A)  Box temperature rises a predetermined amount 
B)  Maximum off time limit has been reached 
C)  Engine block temperature falls below a predetermined temperature 
D)  Any of the above will initiate a restart

Question 15

If the ambient temperature is 80°F and the unit thermostat is set at 32°F and the box temperature is 34°F what mode of operation will the unit be in?

Accepted Answer

A)  High speed heat 
B)  Low speed heat 
C)  High speed cool 
D)  Low speed cool 
A)  High speed heat 
B)  Low speed heat 
C)  High speed cool 
D)  Low speed cool

The refrigeration unit thermostat will not:

Unlike a standard van trailer a reefer trailer is constructed with insulation in the floors, walls, ceiling, and doors. Insulating properties are also known as:

A multi-temperature refrigeration unit does not share a common:

When a refrigeration unit starts short cycling because the trailer has been improperly loaded what component is tricked into thinking the temperature within the controlled space is sufficient?

What refrigerant is currently being used in refrigeration equipment?

When a trailer is loaded, what is the minimum recommended spacing between the product and the roof?

What directs the flow of air from the evaporator throughout the trailer?

Why is a reefer floor manufactured in a corrugated design?

The job of the condenser is:

Even if a refrigeration unit is operating properly a load can still spoil due to:

Why is it necessary to precool the product before loading?

What component dissipates the heat from the controlled space?

What component controls engine high or low speed operation?

When a unit is run in the auto stop/start mode and has automatically shut off what will trigger the unit to restart?

If the ambient temperature is 80°F and the unit thermostat is set at 32°F and the box temperature is 34°F what mode of operation will the unit be in?

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 Components

Truck Trailer Refrigerant Flow Control

Truck Trailer Refrigeration Electrical Components

Truck Trailer Refrigeration Maintenance Procedures

Filters

Exam 13: Truck Trailer Refrigeration Equipment

The refrigeration unit thermostat will not:

Unlike a standard van trailer a reefer trailer is constructed with insulation in the floors, walls, ceiling, and doors. Insulating properties are also known as:

A multi-temperature refrigeration unit does not share a common:

When a refrigeration unit starts short cycling because the trailer has been improperly loaded what component is tricked into thinking the temperature within the controlled space is sufficient?

What refrigerant is currently being used in refrigeration equipment?

When a trailer is loaded, what is the minimum recommended spacing between the product and the roof?

What directs the flow of air from the evaporator throughout the trailer?

Why is a reefer floor manufactured in a corrugated design?

The job of the condenser is:

Even if a refrigeration unit is operating properly a load can still spoil due to:

Why is it necessary to precool the product before loading?

What component dissipates the heat from the controlled space?

What component controls engine high or low speed operation?

When a unit is run in the auto stop/start mode and has automatically shut off what will trigger the unit to restart?

If the ambient temperature is 80°F and the unit thermostat is set at 32°F and the box temperature is 34°F what mode of operation will the unit be in?

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 Components

Truck Trailer Refrigerant Flow Control

Truck Trailer Refrigeration Electrical Components

Truck Trailer Refrigeration Maintenance Procedures

Filters