Deck 14: Cooling System

Question 1

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

Answer 1

A

Question 2

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

Answer 2

C

Question 3

What is the coolant change interval recommended by most manufacturers?

Answer 3

Most vehicle manufacturers recommend that coolant be changed at least every 3 years or 30,000 miles.

Question 4

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

Question 5

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

Question 6

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 7

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

Question 8

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

Question 9

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

Question 10

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

Question 11

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 12

What instrument can determine the coolant's conductivity?

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

Question 13

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

Question 14

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

Question 15

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

Question 16

What is another term for extended-life coolants?

Question 17

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 18

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 19

Water pumps are sometimes driven by the timing belt.

Question 20

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

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