Deck 14: Cooling System

Question 1

A thermostat is installed with its temperature bulb facing the radiator.

Answer 1

False

Question 2

Technician A says the lower radiator hose suffers the most abuse. Technician B says that a defective hose may be easily determined by outward appearance. Who is right?

A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

Answer 2

D

Question 3

Technician A says water will absorb more heat than ethylene glycol. Technician B says permanent antifreeze/coolant does not evaporate. Who is right?

A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

Answer 3

C

Question 4

What instrument can determine the coolant's conductivity?

A)a voltmeter
B)a hydrometer
C)a coolant exchanger
D)a refractometer

Question 5

Technician A says that for each pound of pressure on the cooling system, the boiling point raises one degree Fahrenheit. Technician B says engine rebuilders epoxy heat tabs to the cylinder heads to protect against dishonest warranty claims. Who is correct?

A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

Question 6

The jiggle pin or check valve in a thermostat helps bypass coolant as the temperature rises.

Question 7

Technician A says a temperature-controlled fan clutch is controlled by a spring that shrinks when it is heated and expands when it is cooled. Technician B says that electric fans found on many late model cars sometimes run after the engine is shut off. Who is correct?

A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

Question 8

All of the following are examples of the cause of electrolysis, EXCEPT _____.

A)triazoles
B)bad ground circuit
C)chemical
D)static electricity

Question 9

What is another term for extended-life coolants?

Question 10

Cavitation means air bubbles form in the coolant and then collapse.

Question 11

What coolant tester that measures specific gravity is no longer recommended by the American Society for Testing and Materials (ASTM)?

Question 12

What substance can be used to dilute coolant that has too high a concentration?

Question 13

Technician A says conventional coolants with silicate additives have a very long shelf life. Technician B says European coolants contain higher concentrations of silicates than found in North American coolants. Who is right?

A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

Question 14

Technician A says coolant is disposed of as hazardous waste. Technician B says ethylene glycol is flammable at room temperature. Who is right?

A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

Question 15

A 30% water and 70% antifreeze is the maximum mixture that should be used.

Question 16

If a flushing procedure is not entirely effective in correcting an engine with thermoplastic seizure, what must be done?

Question 17

Technician A says borax included in an SCA package is a buffer and acid neutralizer. Technician B says phosphate is added to antifreeze to protect aluminum parts in the cooling system. Who is correct?

A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

Question 18

What is the coolant change interval recommended by most manufacturers?

Question 19

Technician A says aluminum oxide forms if the coolant becomes too diluted with water. Technician B says the thermostat on all engines remains closed until its predetermined opening point. Who is correct?

A)Technician A
B)Technician B
C)Both technicians
D)Neither technician

Question 20

Water pumps are sometimes driven by the timing belt.

Question 21

Technician A says that the pressure cap can raise the boiling temperature of the coolant. Technician B says that the small valve in the center of the radiator cap is the vacuum valve. Who is right?

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

Question 22

When a radiator is disassembled and cleaned out, this is called _____ out.

Question 23

What is it called when an electrical current develops between two dissimilar types of metal in the cooling system?

Question 24

Technician A says that a vehicle that overheats only on the freeway probably has a stuck-closed thermostat. Technician B says that the thermostat can be left out of the engine with no ill effects. Who is right?

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

Question 25

What passage allows coolant to circulate within the block when the thermostat is closed?

Question 26

_____ is the name of one type of coolant additive that protects aluminum.

Question 27

Why is there a small hole in some thermostats?

Question 28

What is the name of the tool that compares the density of water to that of coolant?

Question 29

Technician A says that the lower radiator hose fails most often. Technician B says that 100% coolant provides better cooling than a mixture of coolant and water. Who is right?

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

Question 30

Automotive coolant is a combination of ethylene glycol and ____

Question 31

What is the name of the small valve in the center of a radiator pressure cap?

Question 32

Why is ethylene glycol coolant dangerous to animals?

Question 33

Technician A says that installing a thermostat with a lower temperature rating will help an engine run cooler in hot weather. Technician B says that a stuck-closed thermostat can cause a computer-controlled fuel system to run rich when the engine is cold. Who is right?

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

Question 34

When the bottom of a radiator core feels considerably colder to the touch than its top, it is probably plugged.
A. True
B. False

Question 35

Two names for the part of the radiator that automatic transmission fluid flows through are the transmission oil cooler and the heat _____.

Question 36

Technician A says that a fan is not necessary at freeway speeds. Technician B says that the fan is supposed to push air through the radiator. Who is right?

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

Question 37

For each pound of pressure on the coolant, approximately how much will its boiling point increase ? _____ °F

Question 38

When measuring the voltage of coolant, what is the limit before the system should be flushed out?

Question 39

_____ in the thermostat expands to cause it to open.

Question 40

What can happen to the coolant pump if cold water is added to an overheated cooling system?

Question 41

Technician A says that in a conventional flow cooling system, coolant leaves the engine through the top radiator hose. Technician B says that if cold water is added to a hot cooling system, the coolant pump could start to leak. Who is right?

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

Question 42

Two technicians are attempting to locate a leak by using a pressure tester on the radiator. Technician A says to use a mirror and flashlight to locate a leak if the location cannot be seen. Technician B says to run the engine when performing the test. Who is right?

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

Question 43

A transmission heat exchanger has failed. Technician A says that if the engine is running, oil will flow from the transmission to the radiator. Technician B says that when the engine is off, coolant will flow into the transmission. Who is right?

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

Question 44

Technician A says that older radiator cores are made of copper and brass. Technician B says that newer radiator cores are usually made of aluminum and have plastic tanks. Who is right?

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

Question 45

Technician A says that when replacing a thermostat the temperature sensing bulb faces out of the block. Technician B says that engines with aluminum heads should use antifreeze with special (silicate) additives. Who is right?

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