Question 1

Which of the following is not and advantage of an engine coolant heater?

Accepted Answer

A)  Heat cab or sleeper 
B)  Keep engine warm for easy winter starting 
C)  Faster windshield defrost time in winter 
D)  Cools cab and sleeper 
A)  Heat cab or sleeper 
B)  Keep engine warm for easy winter starting 
C)  Faster windshield defrost time in winter 
D)  Cools cab and sleeper D

Question 2

What is the component that controls the position of the vent doors on a blend air system?

Accepted Answer

A)  Solenoids 
B)  Thermistors 
C)  Stepper motors 
D)  Rotory motors 
A)  Solenoids 
B)  Thermistors 
C)  Stepper motors 
D)  Rotory motors C

Question 3

Temperature sensors are used to send signals back to the electronic control unit for the HVAC system. These sensors contain a temperature dependent resistor known as:

Accepted Answer

A)  A variable resistor 
B)  A thermostatic switch 
C)  A thermistor 
D)  A ranging resistor 
A)  A variable resistor 
B)  A thermostatic switch 
C)  A thermistor 
D)  A ranging resistor C

Question 4

Pulse width modulated water valves are electronically controlled by electrical impulses from:

Accepted Answer

A)  The control unit 
B)  The heater core 
C)  The evaporator 
D)  Control panel cable 
A)  The control unit 
B)  The heater core 
C)  The evaporator 
D)  Control panel cable

Question 5

If an HVAC control panel is equipped with a recirculation feature it means that:

Accepted Answer

A)  When activated the recirculation door is closed preventing dust and contaminants from entering the cab. 
B)  Cooling time when air conditioning is selected will be lower. 
C)  The recirculation feature will not operate in the defrost mode. 
D)  All of the above statements are true in regards to the recirculation feature. 
A)  When activated the recirculation door is closed preventing dust and contaminants from entering the cab. 
B)  Cooling time when air conditioning is selected will be lower. 
C)  The recirculation feature will not operate in the defrost mode. 
D)  All of the above statements are true in regards to the recirculation feature.

Question 6

Which of the following are methods of controlling the temperature inside the vehicle cab?

Accepted Answer

A)  Water-valve control system 
B)  Blend air system 
C)  Supplemental heating and cooling systems 
D)  All of the above 
A)  Water-valve control system 
B)  Blend air system 
C)  Supplemental heating and cooling systems 
D)  All of the above

Question 7

If a coolant heater shuts down due to a flame out while running the unit will:

Accepted Answer

A)  Attempt to restart once 
B)  Attempt to restart twice 
C)  Attempt to restart three times 
D)  Do not attempt to start and immediately trip a fault light 
A)  Attempt to restart once 
B)  Attempt to restart twice 
C)  Attempt to restart three times 
D)  Do not attempt to start and immediately trip a fault light

Question 8

On the water-valve controlled system the flow of coolant through:

Accepted Answer

A)  The radiator is restricted 
B)  Though the heater core is restricted to increase temperature 
C)  Through the heater core is restricted to decrease temperature 
D)  The engine thermostat 
A)  The radiator is restricted 
B)  Though the heater core is restricted to increase temperature 
C)  Through the heater core is restricted to decrease temperature 
D)  The engine thermostat

Question 9

What component is responsible for controlling the temperature at the outlets of a manual water-valve controlled system?

Accepted Answer

A)  A water valve 
B)  A thermistor 
C)  A blend door 
D)  A pulse modulated solenoid valve 
A)  A water valve 
B)  A thermistor 
C)  A blend door 
D)  A pulse modulated solenoid valve

Question 10

The blend air system controls air temperature by:

Accepted Answer

A)  Controlling the flow of coolant circulated through the heater core. 
B)  Controlling the volume of cold air produced by the evaporator. 
C)  Controlling the function of an electrical element. 
D)  Controlling a vent door to mix the air through the heater core with fresh air or air circulated through the evaporator coil. 
A)  Controlling the flow of coolant circulated through the heater core. 
B)  Controlling the volume of cold air produced by the evaporator. 
C)  Controlling the function of an electrical element. 
D)  Controlling a vent door to mix the air through the heater core with fresh air or air circulated through the evaporator coil.

Question 11

Supplemental temperature control systems are used:

Accepted Answer

A)  To prevent long periods of engine idling reducing greenhouse gases. 
B)  Prevent much wear and tear to the vehicles engine caused by idling. 
C)  Save large quantities of diesel fuel by eliminating idling. 
D)  All of the above are reasons to use a form of supplemental temperature control system. 
A)  To prevent long periods of engine idling reducing greenhouse gases. 
B)  Prevent much wear and tear to the vehicles engine caused by idling. 
C)  Save large quantities of diesel fuel by eliminating idling. 
D)  All of the above are reasons to use a form of supplemental temperature control system.

Question 12

Which of the following is not an advantage of a fuel fired cab interior heater?

Accepted Answer

A)  Heat the cab or sleeper 
B)  Keep the fuel warm in the winter 
C)  Keep the trucks batteries fully charged 
D)  Use less fuel than idling the trucks engine 
A)  Heat the cab or sleeper 
B)  Keep the fuel warm in the winter 
C)  Keep the trucks batteries fully charged 
D)  Use less fuel than idling the trucks engine

Question 13

What would happen to the performance of the HVAC unit if the manual coolant shut off valve on the engine were closed?

Accepted Answer

A)  The unit could cool but not control temperature in the main cab. 
B)  The unit could cool but not control temperature in the sleeper compartment. 
C)  The unit would not heat or control temperature of either the cab or sleeper compartment. 
D)  All of the above statements are possible scenarios. 
A)  The unit could cool but not control temperature in the main cab. 
B)  The unit could cool but not control temperature in the sleeper compartment. 
C)  The unit would not heat or control temperature of either the cab or sleeper compartment. 
D)  All of the above statements are possible scenarios.

Question 14

Auxiliary power units have an additional advantage over both the coolant and interior heaters in that:

Accepted Answer

A)  They can heat the air in the cab or sleeper 
B)  Keep the engine warm for easy starting 
C)  Produce electrical power for appliances and accessories 
D)  Use less fuel than idling the trucks engine 
A)  They can heat the air in the cab or sleeper 
B)  Keep the engine warm for easy starting 
C)  Produce electrical power for appliances and accessories 
D)  Use less fuel than idling the trucks engine

Question 15

Which of the following is an advantage of truck stop electrification?

Accepted Answer

A)  Eliminate idling of the trucks engine reducing harmful greenhouse gasses 
B)  Ability to operate any electrical appliance with an onboard generator 
C)  HVAC hose supplies air at the desired temperature to the cab of the vehicle 
D)  All of the above statements is an advantage of truck stop electrification 
A)  Eliminate idling of the trucks engine reducing harmful greenhouse gasses 
B)  Ability to operate any electrical appliance with an onboard generator 
C)  HVAC hose supplies air at the desired temperature to the cab of the vehicle 
D)  All of the above statements is an advantage of truck stop electrification

Which of the following is not and advantage of an engine coolant heater?

What is the component that controls the position of the vent doors on a blend air system?

Temperature sensors are used to send signals back to the electronic control unit for the HVAC system. These sensors contain a temperature dependent resistor known as:

Pulse width modulated water valves are electronically controlled by electrical impulses from:

If an HVAC control panel is equipped with a recirculation feature it means that:

Which of the following are methods of controlling the temperature inside the vehicle cab?

If a coolant heater shuts down due to a flame out while running the unit will:

On the water-valve controlled system the flow of coolant through:

What component is responsible for controlling the temperature at the outlets of a manual water-valve controlled system?

The blend air system controls air temperature by:

Supplemental temperature control systems are used:

Which of the following is not an advantage of a fuel fired cab interior heater?

What would happen to the performance of the HVAC unit if the manual coolant shut off valve on the engine were closed?

Auxiliary power units have an additional advantage over both the coolant and interior heaters in that:

Which of the following is an advantage of truck stop electrification?

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

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 9: Climate Controlsupplemental Truck Heatingcooling

Which of the following is not and advantage of an engine coolant heater?

What is the component that controls the position of the vent doors on a blend air system?

Temperature sensors are used to send signals back to the electronic control unit for the HVAC system. These sensors contain a temperature dependent resistor known as:

Pulse width modulated water valves are electronically controlled by electrical impulses from:

If an HVAC control panel is equipped with a recirculation feature it means that:

Which of the following are methods of controlling the temperature inside the vehicle cab?

If a coolant heater shuts down due to a flame out while running the unit will:

On the water-valve controlled system the flow of coolant through:

What component is responsible for controlling the temperature at the outlets of a manual water-valve controlled system?

The blend air system controls air temperature by:

Supplemental temperature control systems are used:

Which of the following is not an advantage of a fuel fired cab interior heater?

What would happen to the performance of the HVAC unit if the manual coolant shut off valve on the engine were closed?

Auxiliary power units have an additional advantage over both the coolant and interior heaters in that:

Which of the following is an advantage of truck stop electrification?

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

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