Question 1

All of the following statements about engine cooling are true,EXCEPT:

Accepted Answer

A)  Engine heat is transferred to the coolant. 
B)  Coolant heat is transferred to the ambient air. 
C)  Heat transfer is through conduction and radiation. 
D)  Much of the heat generated in the engine leaves through the exhaust system. 
A)  Engine heat is transferred to the coolant. 
B)  Coolant heat is transferred to the ambient air. 
C)  Heat transfer is through conduction and radiation. 
D)  Much of the heat generated in the engine leaves through the exhaust system. C

Question 2

All of the following conditions could cause an engine coolant loss,EXCEPT:

Accepted Answer

A)  leaking engine head gasket. 
B)  leaking transmission cooler lines. 
C)  faulty radiator pressure cap. 
D)  leaking transmission oil cooler. 
A)  leaking engine head gasket. 
B)  leaking transmission cooler lines. 
C)  faulty radiator pressure cap. 
D)  leaking transmission oil cooler. B

Question 3

Why do inlet radiator hoses (lower)usually have a spiral steel wire molded into them?

Accepted Answer

To prevent collapse due to the suction action of the coolant pump impeller

Question 4

The engine cooling system is designed to remove about 80 percent of the total engine heat.

Accepted Answer

A) True 
 B)False

Question 5

Technician A  says a defective radiator cap vacuum valve may cause hoses to collapse.Technician B says a defective pressure valve may cause coolant boil over and loss.Who is correct?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A only 
B)  Technician B only 
C)  Both A and B 
D)  Neither A nor B

Question 6

What is a PTC heater and on what vehicles can it be found?

Accepted Answer

The PTC heater is a positive temperature

Question 7

A vehicle is in for service with a complaint of poor heat output.The technician finds air trapped in the heater core.What is the most likely cause of this condition?

Accepted Answer

A)  A faulty radiator pressure cap. 
B)  A leaking cyclinder head gasket. 
C)  Worn water pump impeller blade. 
D)  A stuck open engine thermostat. 
A)  A faulty radiator pressure cap. 
B)  A leaking cyclinder head gasket. 
C)  Worn water pump impeller blade. 
D)  A stuck open engine thermostat.

Question 8

If a thermostat fails in the open position,all of the following will occur,EXCEPT:

Accepted Answer

A)  A loss of engine coolant. 
B)  A longer than normal warm-up period. 
C)  Poor heater performance. 
D)  A vehicle may fail emissions test. 
A)  A loss of engine coolant. 
B)  A longer than normal warm-up period. 
C)  Poor heater performance. 
D)  A vehicle may fail emissions test.

Question 9

All of the following conditions could cause poor passenger compartment heating system performance EXCEPT:

Accepted Answer

A)  An air pocket in the heater core. 
B)  Thermostat stuck in the closed position. 
C)  A heater control valve stuck in the closed position. 
D)  A restricted heater core. 
A)  An air pocket in the heater core. 
B)  Thermostat stuck in the closed position. 
C)  A heater control valve stuck in the closed position. 
D)  A restricted heater core.

Question 10

What is the difference between the vertical flow and cross flow radiators?

Accepted Answer

In the vertical flow radiator,

Question 11

Many electric cooling fans are ultimately controlled by what device?

Accepted Answer

power trai

Question 12

What is the purpose of the automotive cooling system?

Accepted Answer

The purpose of the automotive cooling sy

Question 13

Name two common radiator core designs.

Accepted Answer

Tubular core,cellula

Question 14

Caustic cleaning solutions should not be used in ____ radiators.

Accepted Answer

A)  aluminum 
B)  copper 
C)  plastic 
D)  any 
A)  aluminum 
B)  copper 
C)  plastic 
D)  any

Question 15

The two basic design types of radiators are

Accepted Answer

A)  down flow and cross flow. 
B)  up flow and down flow. 
C)  cross flow and recirculating flow. 
D)  up flow and cross flow. 
A)  down flow and cross flow. 
B)  up flow and down flow. 
C)  cross flow and recirculating flow. 
D)  up flow and cross flow.

Question 16

During a routine fluid level inspection a radiator is found to be low on coolant,but the coolant recovery tank was at the proper level.Technician A  says that a faulty radiator cap could be the cause.Technician A  says that a cracked radiator to recovery tank hose could be the cause.Who is correct?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A only 
B)  Technician B only 
C)  Both A and B 
D)  Neither A nor B

Question 17

What is the purpose of a heater core control valve?

Accepted Answer

The heater core control valve

Question 18

Name the common engine antifreezes in use today.

Accepted Answer

Standard ethylene gl

Question 19

Technician A  says the primary purpose of a thermostat is to cause the engine to warm up as soon as possible.Technician B  says the thermostat should be removed from the cooling system only if the engine is overheating.Who is correct?

Accepted Answer

A)  Technician A only 
B)  Technician B only 
C)  Both A and B 
D)  Neither A nor B 
A)  Technician A only 
B)  Technician B only 
C)  Both A and B 
D)  Neither A nor B

Question 20

If a thermostat fails in the open position,all of the following will occur,EXCEPT:

Accepted Answer

A)  longer than normal warm-up period. 
B)  poor heater performance. 
C)  loss of coolant. 
D)  erratic computer control system operation. 
A)  longer than normal warm-up period. 
B)  poor heater performance. 
C)  loss of coolant. 
D)  erratic computer control system operation.

All of the following statements about engine cooling are true,EXCEPT:

All of the following conditions could cause an engine coolant loss,EXCEPT:

Why do inlet radiator hoses (lower)usually have a spiral steel wire molded into them?

The engine cooling system is designed to remove about 80 percent of the total engine heat.

Technician A says a defective radiator cap vacuum valve may cause hoses to collapse.Technician B says a defective pressure valve may cause coolant boil over and loss.Who is correct?

What is a PTC heater and on what vehicles can it be found?

A vehicle is in for service with a complaint of poor heat output.The technician finds air trapped in the heater core.What is the most likely cause of this condition?

If a thermostat fails in the open position,all of the following will occur,EXCEPT:

All of the following conditions could cause poor passenger compartment heating system performance EXCEPT:

What is the difference between the vertical flow and cross flow radiators?

Many electric cooling fans are ultimately controlled by what device?

What is the purpose of the automotive cooling system?

Name two common radiator core designs.

Caustic cleaning solutions should not be used in ____ radiators.

The two basic design types of radiators are

During a routine fluid level inspection a radiator is found to be low on coolant,but the coolant recovery tank was at the proper level.Technician A says that a faulty radiator cap could be the cause.Technician A says that a cracked radiator to recovery tank hose could be the cause.Who is correct?

What is the purpose of a heater core control valve?

Name the common engine antifreezes in use today.

Technician A says the primary purpose of a thermostat is to cause the engine to warm up as soon as possible.Technician B says the thermostat should be removed from the cooling system only if the engine is overheating.Who is correct?

If a thermostat fails in the open position,all of the following will occur,EXCEPT:

Heating and Air Conditioning - History and the Environment

Temperature and Pressure Fundamentals

Air-Conditioning System Operating Principlesthe Manifold and Gauge Set

Refrigerant System Componentsservicing System Components

Refrigerant System Servicing and Testingair-Conditioning System Servicing and Testing

Diagnosis of the Refrigeration System

Compressors and Clutches

Case and Duct Systems

System Controlsdiagnosis and Service of System Controls

Retrofit and Future Trends

Extenssion 1: Shop Safety

Extenssion 2: Typical Shop Procedures and Tools

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Exam 3: Engine Cooling and Comfort Heating Systemsdiagnosis and Service of Engine Cooling and Comfort Heating Systems

All of the following statements about engine cooling are true,EXCEPT:

All of the following conditions could cause an engine coolant loss,EXCEPT:

Why do inlet radiator hoses (lower)usually have a spiral steel wire molded into them?

The engine cooling system is designed to remove about 80 percent of the total engine heat.

Technician A says a defective radiator cap vacuum valve may cause hoses to collapse.Technician B says a defective pressure valve may cause coolant boil over and loss.Who is correct?

What is a PTC heater and on what vehicles can it be found?

A vehicle is in for service with a complaint of poor heat output.The technician finds air trapped in the heater core.What is the most likely cause of this condition?

If a thermostat fails in the open position,all of the following will occur,EXCEPT:

All of the following conditions could cause poor passenger compartment heating system performance EXCEPT:

What is the difference between the vertical flow and cross flow radiators?

Many electric cooling fans are ultimately controlled by what device?

What is the purpose of the automotive cooling system?

Name two common radiator core designs.

Caustic cleaning solutions should not be used in ____ radiators.

The two basic design types of radiators are

During a routine fluid level inspection a radiator is found to be low on coolant,but the coolant recovery tank was at the proper level.Technician A says that a faulty radiator cap could be the cause.Technician A says that a cracked radiator to recovery tank hose could be the cause.Who is correct?

What is the purpose of a heater core control valve?

Name the common engine antifreezes in use today.

Technician A says the primary purpose of a thermostat is to cause the engine to warm up as soon as possible.Technician B says the thermostat should be removed from the cooling system only if the engine is overheating.Who is correct?

If a thermostat fails in the open position,all of the following will occur,EXCEPT:

Heating and Air Conditioning - History and the Environment

Temperature and Pressure Fundamentals

Air-Conditioning System Operating Principlesthe Manifold and Gauge Set

Refrigerant System Componentsservicing System Components

Refrigerant System Servicing and Testingair-Conditioning System Servicing and Testing

Diagnosis of the Refrigeration System

Compressors and Clutches

Case and Duct Systems

System Controlsdiagnosis and Service of System Controls

Retrofit and Future Trends

Extenssion 1: Shop Safety

Extenssion 2: Typical Shop Procedures and Tools

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