Question 1

What is the process involved in removing a thermostat?

Accepted Answer

1. Drain some coolant into a clean container until the coolant level is below the thermostat housing.
2. Remove the upper radiator hose connection from the thermostat housing.
3. Loosen the housing bolts and remove the housing.
4. Remove the gasket or seal and carefully clean the surface of the housing and the mounting surface on the engine. If any gasket remains on either of the surfaces, there will probably be a coolant leak after reassembly.

Question 2

Most thermostats start to open at between ____.

Accepted Answer

A) 500F and 1000F 
B) 1880F and 1950F 
C) 1900F and 2000F 
D) 2500F and 3000F 
A) 500F and 1000F 
B) 1880F and 1950F 
C) 1900F and 2000F 
D) 2500F and 3000F B

Question 3

A radiator can be damaged by a collision with the cooling fan blade if a fan clutch or water pump bearing fails.

Accepted Answer

A) True 
 B)False  True

Question 4

Which of the following statements is LEAST-Likely true?

Accepted Answer

A) A recovery tank is a good feature to add to an older car if it does not already have one. 
B) When a tank vibrates on rough roads, it can be torn from its mount. 
C) If the radiator cap needs to be replaced on a recovery tank system, be sure the new cap includes a seal that works against the top of the filler neck, too. 
D) One gallon of water weighs about 5 pounds. 
A) A recovery tank is a good feature to add to an older car if it does not already have one. 
B) When a tank vibrates on rough roads, it can be torn from its mount. 
C) If the radiator cap needs to be replaced on a recovery tank system, be sure the new cap includes a seal that works against the top of the filler neck, too. 
D) One gallon of water weighs about 5 pounds.

Question 5

A plugged radiator will cause overheating at freeway speeds.

Accepted Answer

A) True 
 B)False

Question 6

Older vehicles had radiator tanks made of brass, soldered to a copper radiator core. If the fins of the core are in good condition, a restricted copper/brass radiator can be disassembled and ____________________ by a shop specializing in radiator repairs.

Accepted Answer

The answer of Older vehicles had radiator tanks made of...

Question 7

What items would you check on a radiator cap?

Accepted Answer

- Check the rubber seal to see that it i

Question 8

What is the MOST-Likely temperature at which one popular hybrid system used by several manufacturers stores heated coolant for up to three days?

Accepted Answer

A) 1450F 
B) 1670F 
C) 1760F 
D) 1930F 
A) 1450F 
B) 1670F 
C) 1760F 
D) 1930F

Question 9

What are the steps involved in physically testing a fan clutch?

Accepted Answer

1. First, with the engine off, turn the

Question 10

How does the heater core receive engine coolant?

Accepted Answer

The heater core receives engin

Question 11

When there is an internal leak, coolant will flow into the cylinder during the ____________________ stroke and when the engine is off.

Accepted Answer

The answer of When there is an internal leak, coolant...

Question 12

While having a discussion, Technician A says that a loose water pump drive belt can cause overheating on an older engine without a spring-loaded belt tensioner. If this happens, he states, the belt will probably squeal as it slips. Technician B say that if that is the case, the charging system light on the instrument panel will probably illuminate and the battery charge level will drop. Who is correct?

Accepted Answer

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

Question 13

Today's high-temperature engines do not require an intact fan shroud for the cooling fan to be efficient.

Accepted Answer

A) True 
 B)False

Question 14

What is the process involved in testing the thermostat in the car?

Accepted Answer

On OBD II-equipped vehicles, a scan tool

Question 15

To bleed a cooling system without an airlift, remove a heater hose at the highest place in the system while filling the ____________________.

Accepted Answer

The answer of To bleed a cooling system without an...

Question 16

Coolant loses some of its protective ability during use and can become corrosive from contamination.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following statements is LEAST-Likely true?

Accepted Answer

A) Ethylene glycol coolant is mixed with purified water until its concentration is correct. 
B) When coolant strength has been allowed to become weak through dilution or additives are depleted, a coolant flush and change is recommended. 
C) Draining off a quart of coolant and adding straight coolant can weaken a slightly weak concentration. 
D) Coolant in too high a concentration can be further diluted with purified water. 
A) Ethylene glycol coolant is mixed with purified water until its concentration is correct. 
B) When coolant strength has been allowed to become weak through dilution or additives are depleted, a coolant flush and change is recommended. 
C) Draining off a quart of coolant and adding straight coolant can weaken a slightly weak concentration. 
D) Coolant in too high a concentration can be further diluted with purified water.

Question 18

While having a discussion, Technician A says that if the voltmeter reads 0.4 volt or more, the system should be flushed and refilled with new coolant to prevent corrosion of the metal parts in the system. Technician B says that the system should be flushed if the voltmeter reading is less than 0.4. Who is correct?

Accepted Answer

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

Question 19

What is the MOST-Likely material that will not corrode and that routinely replaces steel core plugs in cast iron blocks?

Accepted Answer

A) copper 
B) brass 
C) aluminum 
D) lead 
A) copper 
B) brass 
C) aluminum 
D) lead

Question 20

If the engine stops with a piston down in its cylinder and the valves are closed, the engine will be ____ and the crankshaft will not be able to turn.

Accepted Answer

A) overheated 
B) blocked 
C) hydrolocked 
D) cooled 
A) overheated 
B) blocked 
C) hydrolocked 
D) cooled

Exam 21: Cooling System Service

What is the process involved in removing a thermostat?

Most thermostats start to open at between ____.

A radiator can be damaged by a collision with the cooling fan blade if a fan clutch or water pump bearing fails.

Which of the following statements is LEAST-Likely true?

A plugged radiator will cause overheating at freeway speeds.

Older vehicles had radiator tanks made of brass, soldered to a copper radiator core. If the fins of the core are in good condition, a restricted copper/brass radiator can be disassembled and ____________________ by a shop specializing in radiator repairs.

What items would you check on a radiator cap?

What is the MOST-Likely temperature at which one popular hybrid system used by several manufacturers stores heated coolant for up to three days?

What are the steps involved in physically testing a fan clutch?

How does the heater core receive engine coolant?

When there is an internal leak, coolant will flow into the cylinder during the ____________________ stroke and when the engine is off.

Today's high-temperature engines do not require an intact fan shroud for the cooling fan to be efficient.

What is the process involved in testing the thermostat in the car?

To bleed a cooling system without an airlift, remove a heater hose at the highest place in the system while filling the ____________________.

Coolant loses some of its protective ability during use and can become corrosive from contamination.

Which of the following statements is LEAST-Likely true?

What is the MOST-Likely material that will not corrode and that routinely replaces steel core plugs in cast iron blocks?

If the engine stops with a piston down in its cylinder and the valves are closed, the engine will be ____ and the crankshaft will not be able to turn.

Introduction to the Automobile

Automotive Careers and Technician Certification

Shop Safety

Shop Management, Service Records, and Parts

Locating Service Information and Specifications

Measuring Tools and Systems

Hardware, Fasteners, Drills, and Thread Repair

Shop Tools

General Shop Equipment

Cleaning Equipment and Methods

Lifting Equipment and Air Compressors

Engine Lubrication

Underhood and Body Inspection Vehicle on Ground

Undercar Inspection and Service

Introduction to the Engine

Engine Classifications and Types

Engine Size and Measurements

Engine Upper End

Engine Lower End and Lubrication System Theory

Cooling System Theory

Automotive Belts

Automotive Hoses

Automotive Plumbing: Tubing and Pipe

Basic Electrical System Theory and Repairs

Battery Fundamentals

Battery Service

Starting System Fundamentals

Starting System Service

Charging System Fundamentals

Charging System Service

Lighting and Wiring Fundamentals

Lighting and Wiring Service

Safety, Security, Comfort Systems, and Electrical Accessories

Heating and Air-Conditioning Fundamentals

Heating and Air-Conditioning Service

Ignition System Fundamentals

Ignition System Service

Petroleum Fuels and Alternative Fuel Technologies

Fuel System Fundamentals, Gasoline and Diesel

Fuel System Service

Intake and Exhaust Systemsturbochargers and Superchargers

Emission Control System Fundamentals, Gasoline and Diesel

Emission Control System Service

Electronics and Computer Systems Fundamentals

Electronics and Computer Systems Service

Advanced Emission and On-Board Diagnostics Obd

Diagnosing Engine Performance Problems

Diagnosing Engine Mechanical Problems

Engine Removal and Disassembly

Engine Sealing Gaskets, Fastener Torque

Engine Diagnosis and Service: Cylinder Head and Valve Train

Engine Diagnosis and Service: Block, Crankshaft, Bearings, and Lubrication System

Engine Diagnosis and Service: Piston, Piston Rings, Connecting Rod, Engine Balancing

Ordering Parts, Short and Long Blocks, Engine Assembly

Engine Installation, Break-In, and In-Chassis Repairs

Brake Fundamentals

Brake Service

Antilock Brakes, Traction, and Stability Control

Bearings, Seals, and Greases

Tire and Wheel Theory

Tire and Wheel Service