Exam 20: Coolant

Using 100% coolant in the cooling system improves the cooling capacity of the system.

DEX-COOL coolant is composed mostly of which of these chemicals?

Asian red coolant is what type?

Testing for galvanic activity is done with the coolant ________ and the engine ________.

Technician A says that galvanic activity is the result of a poor ground connection. Technician B says that electrolysis can occur with a poor ground connection. Which technician is correct?

Which mixture of coolant/water solution below is recommended for general automotive use?

All these are functions of coolant EXCEPT ________.

Some manufacturers recommend using premixed coolant only in their vehicles.

DEX-COOL is ________.

As the percentage of antifreeze in the coolant increases, ________.

Technician A says that OAT type coolant should be changed every 2 years. Technician B says that IAT type coolant should be changed every 2 years. Which technician is correct?

Technician A says that used coolant should never be recycled. Technician B says that coolant types that include DEX-COOL are ethylene glycol-based. Who is right?

DEX-COOL is what type of coolant?

Reusing old coolant is generally not approved by vehicle manufacturers, with the exception of ________.

Two technicians are discussing testing coolant for proper pH. Technician A says that coolant has a pH above 7 when new and becomes lower with use in an engine. Technician B says that OAT and HOAT coolants have a lower pH when new compared to the old green IAT coolant. Which technician is correct?

A late model vehicle's coolant is being tested. The refractometer reading shows a freezing point of ________.

A normal reading when testing coolant for galvanic activity is ________.

A normal reading when testing for electrolysis in the coolant is ________.

Coolant is water and ________.

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