Chpt 20

Question 1

The refractometer is a tester used to test the blank of the coolant by placing a few drops of coolant on the prism surface?

Answer 1

Freezing point

Question 2

A hydrometer is used to measure the blank of the coolant.

Answer 2

Density

Question 3

The boiling point of a 50/50 mixture of antifreeze and water at sea level is

Answer 3

103 degrees Celsius.

Question 4

The freezing point of a coolant comprising of a 50/50 mixture. Of antifreeze and water is.

Answer 4

37 degrees Celsius.

Question 5

Blank in inorganic additive technology, IAT coolants cause deposits, the form if used with hard water.

Answer 5

phosphates

Question 6

Blank. In an organic additive technology, IAT coolants are most likely to cause erosive wear to water pump impellers.

Answer 6

Silicates

Question 7

The color of inorganic additive technology IAT coolant is

Answer 7

Green

Question 8

Regardless of the type of coolant and its color, the only difference among all original equipment coolant is in the.

Answer 8

Addition of additives.

Question 9

What is the approximate percentage composition of ethylene glycol in ethylene glycol based coolants.

Answer 9

47 percent

Question 10

Blank is able to absorb more heat per gallon than any other liquid coolant

Answer 10

Water

Question 11

Technician a stated that a coolant is a mixture of antifreeze and water.

Answer 11

True

Question 12

Technician b stated that water is able to absorb more heat per gallon than any other liquid coolant.

Answer 12

True

Question 13

When coolant boils, why does it not act as a efficient coolant?

Answer 13

Because it is boiling it vaporizes. And is not in liquid form.

Question 14

Silicates in an organic additive technology IAT coolants can cause erosive wear to what?

Answer 14

Water pump impellers.

Question 15

Organic acid technology oat coolant do not contain

Answer 15

Silicates

Question 16

Technician a stated that phosphates in organic additive technology OAT coolant can cause deposits to form if used with water that is hard

Answer 16

True

Question 17

Technician b stated that the color of inorganic additive technology. IAT coolant is orange.

Answer 17

False

Question 18

Technician. A stated that hybrid organic acid technology hoat coolant use organic acid salts carboxylates that are abrasive to water pumps.

Answer 18

False

Question 19

Technician b stated that the Ph of hybrid organic acid technology hoat coolant is usually below 7.

Answer 19

False

Question 20

Technician. A stated that the boiling point of a 50/50 mixture of antifreeze and water at sea level is 103 Celsius.

Answer 20

True

Question 21

Technician b stated that the boiling point of a 70/30 mixture of antifreeze and water is 50 degrees Celsius.

Answer 21

False

Question 22

Galvanic activity does not require an outside source of voltage.

Answer 22

True

Question 23

The higher density of the coolant the greater the blank of antifreeze is in the water

Answer 23

Concentration

Question 24

Technician A stated that coolant should never be recycled technician b stated that the types of coolant should be constantly changed to prevent passivation.

Answer 24

Neither

Question 25

Coolant is water and

Answer 25

ethylene glycol

Question 26

Adding a chemical to make ethylene glycol cooling bitter to the taste is called.

Answer 26

Embittered?

Question 27

Asian red coolant is what type.

Answer 27

Hybrid organic acid technology.hoat

Question 28

Dex cool is what type of coolant.

Answer 28

oat

Question 29

Phoat coolant. Is what color?

Answer 29

Dark green

Question 30

Reusing old coolant is generally not approved by vehicle manufacturers except

Answer 30

Mercedes

Question 31

Technician a says that coolant has a Ph 7 when new and becomes lower when used in the engine

Answer 31

True

Question 32

Technician b says that oat and hoat coolant have a lower Ph when new compared to the old IAT coolant.

Answer 32

True

Question 33

Dex, cool is ethylene glycol

Answer 33

Is silicate and phosphate free