Question 1

Which of the following states will refrigerant not be in as it flows through the evaporator?

Accepted Answer

A)  Superheated refrigerant vapor 
B)  Saturated liquid 
C)  Sub cooled liquid 
D)  Superheated liquid 
A)  Superheated refrigerant vapor 
B)  Saturated liquid 
C)  Sub cooled liquid 
D)  Superheated liquid D

Question 2

The purpose of the compressor clutch is:

Accepted Answer

A)  To allow the compressor to change gears more easily. 
B)  To assist in matching the speed of the compressor to the engine crankshaft. 
C)  To control the operation of the compressor on or off. 
D)  To prevent shock loading the compressor drive pulley. 
A)  To allow the compressor to change gears more easily. 
B)  To assist in matching the speed of the compressor to the engine crankshaft. 
C)  To control the operation of the compressor on or off. 
D)  To prevent shock loading the compressor drive pulley. C

Question 3

Which of the following switches can cycle the compressor clutch?

Accepted Answer

A)  Thermostatic switch 
B)  Pressure cycling switch 
C)  Trinary switch 
D)  All of the above have the ability to cycle the clutch 
A)  Thermostatic switch 
B)  Pressure cycling switch 
C)  Trinary switch 
D)  All of the above have the ability to cycle the clutch D

Question 4

One ton of refrigeration capacity is equal to:

Accepted Answer

A)  1,200 BTUs per hour 
B)  12,000 BTUs per hour 
C)  120,000 BTUs per hour 
D)  1,200,000 BTUs per hour 
A)  1,200 BTUs per hour 
B)  12,000 BTUs per hour 
C)  120,000 BTUs per hour 
D)  1,200,000 BTUs per hour

Question 5

Where would you not find a high pressure relief valve?

Accepted Answer

A)  Compressor outlet 
B)  Condenser outlet 
C)  Accumulator 
D)  Receiver-drier 
A)  Compressor outlet 
B)  Condenser outlet 
C)  Accumulator 
D)  Receiver-drier

Question 6

As liquid refrigerant exits the thermostatic expansion valve it enters the:

Accepted Answer

A)  Condenser as a low pressure vapor 
B)  Evaporator as a high pressure liquid 
C)  Condenser as a high pressure liquid 
D)  Evaporator as a low pressure liquid with a trace of flash gas 
A)  Condenser as a low pressure vapor 
B)  Evaporator as a high pressure liquid 
C)  Condenser as a high pressure liquid 
D)  Evaporator as a low pressure liquid with a trace of flash gas

Question 7

Which of the following does the trinary switch not control?

Accepted Answer

A)  High system pressure 
B)  Low system pressure 
C)  Cycling of the cooling fan 
D)  Fan timer 
A)  High system pressure 
B)  Low system pressure 
C)  Cycling of the cooling fan 
D)  Fan timer

Question 8

What condition will refrigerant not be in when it reaches the receiver-drier?

Accepted Answer

A)  High pressure liquid 
B)  Low pressure liquid 
C)  Superheated vapor 
D)  Sub cooled liquid 
A)  High pressure liquid 
B)  Low pressure liquid 
C)  Superheated vapor 
D)  Sub cooled liquid

Question 9

Which of the following conditions can cause compressor damage?

Accepted Answer

A)  Low ambient temperature 
B)  Excessively high system pressure 
C)  Low system operating pressure 
D)  All of the above can cause compressor damage under the right circumstances 
A)  Low ambient temperature 
B)  Excessively high system pressure 
C)  Low system operating pressure 
D)  All of the above can cause compressor damage under the right circumstances

Question 10

What is the state of the refrigerant as it leaves the accumulator?

Accepted Answer

A)  Sub cooled liquid 
B)  Superheated vapor 
C)  Superheated liquid 
D)  Sub cooled vapor 
A)  Sub cooled liquid 
B)  Superheated vapor 
C)  Superheated liquid 
D)  Sub cooled vapor

Question 11

Where is the capillary tube of the thermostatic control switch positioned?

Accepted Answer

A)  In the air stream of the evaporator 
B)  Deep inside the evaporator coil 
C)  Deep inside the condenser coil 
D)  To the evaporator outlet pipe 
A)  In the air stream of the evaporator 
B)  Deep inside the evaporator coil 
C)  Deep inside the condenser coil 
D)  To the evaporator outlet pipe

Question 12

Heat energy that was once in the cab of the vehicle is absorbed by the refrigerant and flows to the _________ where it is dissipated to the ambient air.

Accepted Answer

A)  Evaporator 
B)  Receiver drier 
C)  Compressor 
D)  Condenser 
A)  Evaporator 
B)  Receiver drier 
C)  Compressor 
D)  Condenser

Question 13

What energy source causes the refrigerant entering the evaporator to change states as it flows through?

Accepted Answer

A)  Radiant heat energy 
B)  Heat from the engine cooling system 
C)  Heat from the interior of the cab 
D)  Heat of compression 
A)  Radiant heat energy 
B)  Heat from the engine cooling system 
C)  Heat from the interior of the cab 
D)  Heat of compression

Question 14

Which of the following statements is true regarding the fixed orifice tube system?

Accepted Answer

A)  The fixed orifice tube system also uses a receiver drier. 
B)  The evaporator is designed to operate in a flooded state. 
C)  The accumulator is on the inlet side of the evaporator. 
D)  The accumulator is designed with a pick-up tube insuring only liquid refrigerant can return to the compressor. 
A)  The fixed orifice tube system also uses a receiver drier. 
B)  The evaporator is designed to operate in a flooded state. 
C)  The accumulator is on the inlet side of the evaporator. 
D)  The accumulator is designed with a pick-up tube insuring only liquid refrigerant can return to the compressor.

Question 15

Which part of the clutch mechanism is built into the drive pulley?

Accepted Answer

A)  The compressor shaft 
B)  The field coil 
C)  The rotor 
D)  The electro magnetic 
A)  The compressor shaft 
B)  The field coil 
C)  The rotor 
D)  The electro magnetic

Which of the following states will refrigerant not be in as it flows through the evaporator?

The purpose of the compressor clutch is:

Which of the following switches can cycle the compressor clutch?

One ton of refrigeration capacity is equal to:

Where would you not find a high pressure relief valve?

As liquid refrigerant exits the thermostatic expansion valve it enters the:

Which of the following does the trinary switch not control?

What condition will refrigerant not be in when it reaches the receiver-drier?

Which of the following conditions can cause compressor damage?

What is the state of the refrigerant as it leaves the accumulator?

Where is the capillary tube of the thermostatic control switch positioned?

Heat energy that was once in the cab of the vehicle is absorbed by the refrigerant and flows to the _________ where it is dissipated to the ambient air.

What energy source causes the refrigerant entering the evaporator to change states as it flows through?

Which of the following statements is true regarding the fixed orifice tube system?

Which part of the clutch mechanism is built into the drive pulley?

History of Hvac

Environmental and Safety Practices

Thermodynamics

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

Air-Conditioning Components: Metering Devices, Evaporator, Accumulator

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

Truck Trailer Refrigeration Maintenance Procedures

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Exam 6: Air Conditioning Systems

Which of the following states will refrigerant not be in as it flows through the evaporator?

The purpose of the compressor clutch is:

Which of the following switches can cycle the compressor clutch?

One ton of refrigeration capacity is equal to:

Where would you not find a high pressure relief valve?

As liquid refrigerant exits the thermostatic expansion valve it enters the:

Which of the following does the trinary switch not control?

What condition will refrigerant not be in when it reaches the receiver-drier?

Which of the following conditions can cause compressor damage?

What is the state of the refrigerant as it leaves the accumulator?

Where is the capillary tube of the thermostatic control switch positioned?

Heat energy that was once in the cab of the vehicle is absorbed by the refrigerant and flows to the _________ where it is dissipated to the ambient air.

What energy source causes the refrigerant entering the evaporator to change states as it flows through?

Which of the following statements is true regarding the fixed orifice tube system?

Which part of the clutch mechanism is built into the drive pulley?

History of Hvac

Environmental and Safety Practices

Thermodynamics

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

Air-Conditioning Components: Metering Devices, Evaporator, Accumulator

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

Truck Trailer Refrigeration Maintenance Procedures

Filters