Question 1

Coolant filters should not be prematurely when they contain:

Accepted Answer

A)  A TDS (total dissolved solids) probe 
B)  A SCA (supplemental coolant additive) 
C)  Extended life coolant 
D)  High silicate antifreeze 
A)  A TDS (total dissolved solids) probe 
B)  A SCA (supplemental coolant additive) 
C)  Extended life coolant 
D)  High silicate antifreeze B

Question 2

If ethylene and propylene glycol-based coolants are mixed:

Accepted Answer

A)  It will cause and acidic reaction. 
B)  The coolant will not stay mixed. 
C)  The coolant additive package will need to be adjusted. 
D)  Measuring the strength of the coolant is impossible. 
A)  It will cause and acidic reaction. 
B)  The coolant will not stay mixed. 
C)  The coolant additive package will need to be adjusted. 
D)  Measuring the strength of the coolant is impossible. D

Question 3

In regards to pressure testing cooling systems and pressure caps identify the INCORRECT statement.

Accepted Answer

A)  The radiator cap when tested should not open until the system pressure indicated on the cap has been surpassed. 
B)  Always build system pressure up 25% over the rated capacity when checking for cooling system leaks. 
C)  When the cooling system has been allowed to cool down and radiator and heater hoses have been collapsed is an indication that the vacuum relief portion of the radiator cap may be defective. 
D)  Never build system pressure more than 10% of the systems rated capacity when testing for coolant leaks. 
A)  The radiator cap when tested should not open until the system pressure indicated on the cap has been surpassed. 
B)  Always build system pressure up 25% over the rated capacity when checking for cooling system leaks. 
C)  When the cooling system has been allowed to cool down and radiator and heater hoses have been collapsed is an indication that the vacuum relief portion of the radiator cap may be defective. 
D)  Never build system pressure more than 10% of the systems rated capacity when testing for coolant leaks. B

Question 4

A truck cooling system operates in a sequential order. Which of the following is the last in the chain of events?

Accepted Answer

A)  The fan hub is actuated. 
B)  The shutterstat opens the shutters. 
C)  The thermostat begins to open. 
D)  The fanstat is triggered and sends a signal to lock up the fan hub. 
A)  The fan hub is actuated. 
B)  The shutterstat opens the shutters. 
C)  The thermostat begins to open. 
D)  The fanstat is triggered and sends a signal to lock up the fan hub.

Question 5

Antifreeze performs three very important functions within the cooling system. Which of the following is not a function?

Accepted Answer

A)  Lowers the freezing point of the coolant 
B)  Increases the boiling point of the coolant with an ant boiling agent 
C)  Protects and lubricates the components of the cooling system 
D)  Doubles the boiling point of the coolant mixture 
A)  Lowers the freezing point of the coolant 
B)  Increases the boiling point of the coolant with an ant boiling agent 
C)  Protects and lubricates the components of the cooling system 
D)  Doubles the boiling point of the coolant mixture

Question 6

If a vehicle is equipped with at winter front it:

Accepted Answer

A)  Must not cover more that 70% of the radiator surface 
B)  Must not cover more than 75% of the radiator surface 
C)  Must not cover more than 80% of the radiator surface 
D)  Must not cover more than 85% of the radiator surface 
A)  Must not cover more that 70% of the radiator surface 
B)  Must not cover more than 75% of the radiator surface 
C)  Must not cover more than 80% of the radiator surface 
D)  Must not cover more than 85% of the radiator surface

Question 7

Engine cooling fan hubs may be:

Accepted Answer

A)  Actuated by an electrical signal or and air pressure signal as a means of engaging the clutch 
B)  Of the viscous drive variety 
C)  Controlled by a fanstat or engine management system 
D)  All of the above statements are correct 
A)  Actuated by an electrical signal or and air pressure signal as a means of engaging the clutch 
B)  Of the viscous drive variety 
C)  Controlled by a fanstat or engine management system 
D)  All of the above statements are correct

Question 8

The heater core:

Accepted Answer

A)  Is located on the firewall of the truck. 
B)  Has hot engine coolant circulated through it depending upon position of heater control valve. 
C)  Is usually contained in an insulated case alongside the evaporator and blower motor. 
D)  All of the above statements are correct 
A)  Is located on the firewall of the truck. 
B)  Has hot engine coolant circulated through it depending upon position of heater control valve. 
C)  Is usually contained in an insulated case alongside the evaporator and blower motor. 
D)  All of the above statements are correct

Question 9

Which tool would most accurately measure the freeze protection of coolant?

Accepted Answer

A)  Hydrometer 
B)  Refractometer 
C)  Litmus tester 
D)  Flow meter 
A)  Hydrometer 
B)  Refractometer 
C)  Litmus tester 
D)  Flow meter

Question 10

Identify the INCORRECT statement in regards to the engine thermostat:

Accepted Answer

A)  The thermostat is fully open and closes as engine temperature increases. 
B)  The thermostat is fully closed and opens as engine temperature increases. 
C)  The thermostat must be open fully at a set number of degrees above the start to open temperature. 
D)  The thermostat by-passes coolant to the water pump in the closed position. 
A)  The thermostat is fully open and closes as engine temperature increases. 
B)  The thermostat is fully closed and opens as engine temperature increases. 
C)  The thermostat must be open fully at a set number of degrees above the start to open temperature. 
D)  The thermostat by-passes coolant to the water pump in the closed position.

Question 11

Radiators should be checked on all vehicle services for:

Accepted Answer

A)  Condition of fins 
B)  Cleanliness 
C)  Mounting to vehicle 
D)  All of the above should be checked 
A)  Condition of fins 
B)  Cleanliness 
C)  Mounting to vehicle 
D)  All of the above should be checked

Question 12

Which of the following is not a type of radiator construction?

Accepted Answer

A)  Counterflow 
B)  Crossflow 
C)  Downflow 
D)  Sideflow 
A)  Counterflow 
B)  Crossflow 
C)  Downflow 
D)  Sideflow

Question 13

What causes coolant that was expelled from the system to the expansion tank to be return to the cooling system as the engine cools?

Accepted Answer

A)  Water pump flow valve 
B)  Thermostat bypass circuit 
C)  Vacuum relief valve in the pressure cap 
D)  Pressure relief valve in the pressure cap 
A)  Water pump flow valve 
B)  Thermostat bypass circuit 
C)  Vacuum relief valve in the pressure cap 
D)  Pressure relief valve in the pressure cap

Question 14

Which type of radiator construction allow designers to construct a vehicle with a lower hood?

Accepted Answer

A)  Counterflow 
B)  Crossflow 
C)  Downflow 
D)  Sideflow 
A)  Counterflow 
B)  Crossflow 
C)  Downflow 
D)  Sideflow

Question 15

Identify the incorrect statement in regards to engine water pumps.

Accepted Answer

A)  The water pump is a positive displacement centrifugal pump. 
B)  The water pump is a non-positive centrifugal pump. 
C)  Coolant leaving the water pump flows first through the engine block and cylinder head and then into the radiator and back to the pump. 
D)  Water pumps are either belt or gear driven. 
A)  The water pump is a positive displacement centrifugal pump. 
B)  The water pump is a non-positive centrifugal pump. 
C)  Coolant leaving the water pump flows first through the engine block and cylinder head and then into the radiator and back to the pump. 
D)  Water pumps are either belt or gear driven.

Coolant filters should not be prematurely when they contain:

If ethylene and propylene glycol-based coolants are mixed:

In regards to pressure testing cooling systems and pressure caps identify the INCORRECT statement.

A truck cooling system operates in a sequential order. Which of the following is the last in the chain of events?

Antifreeze performs three very important functions within the cooling system. Which of the following is not a function?

If a vehicle is equipped with at winter front it:

Engine cooling fan hubs may be:

The heater core:

Which tool would most accurately measure the freeze protection of coolant?

Identify the INCORRECT statement in regards to the engine thermostat:

Radiators should be checked on all vehicle services for:

Which of the following is not a type of radiator construction?

What causes coolant that was expelled from the system to the expansion tank to be return to the cooling system as the engine cools?

Which type of radiator construction allow designers to construct a vehicle with a lower hood?

Identify the incorrect statement in regards to engine water pumps.

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

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

Exam 8: Truck Engine Cooling Systems

Coolant filters should not be prematurely when they contain:

If ethylene and propylene glycol-based coolants are mixed:

In regards to pressure testing cooling systems and pressure caps identify the INCORRECT statement.

A truck cooling system operates in a sequential order. Which of the following is the last in the chain of events?

Antifreeze performs three very important functions within the cooling system. Which of the following is not a function?

If a vehicle is equipped with at winter front it:

Engine cooling fan hubs may be:

The heater core:

Which tool would most accurately measure the freeze protection of coolant?

Identify the INCORRECT statement in regards to the engine thermostat:

Radiators should be checked on all vehicle services for:

Which of the following is not a type of radiator construction?

What causes coolant that was expelled from the system to the expansion tank to be return to the cooling system as the engine cools?

Which type of radiator construction allow designers to construct a vehicle with a lower hood?

Identify the incorrect statement in regards to engine water pumps.

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

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