Automotive Cooling System Quiz

Which of the following is not a true statement about the functions of an engine cooling system?

• A. It provides a means of warming the passenger compartment.

• B. It removes engine heat.

• C. It keeps the engine from reaching operating temperature too quickly.

• D. It maintains a proper engine operating temperature.

The temperature of the combustion flames can reach ____°F.

• A. 2600

• B. 3200

• C. 3900

• D. 4500

An electric engine fan is controlled by ____.

• A. the timing belt

• B. an engine speed sensor

• C. a thermo switch

• D. a pressure sensor

Typical radiator cap pressure in an automotive cooling system is ____ psi.

• A. 7–10

• B. 12–16

• C. 18–20

• D. 20–26

The correct coolant/antifreeze mixture for use in most vehicles is ____.

• A. pure ethylene glycol

• B. 25% antifreeze/75% water

• C. 50% antifreeze/50% water

• D. pure water

Each of the following is a likely location for a heat-sensitive switch used to control an electric cooling fan, except the ____.

• A. radiator

• B. engine block

• C. heater core

• D. thermostat housing

What is a frequent cause of freeze plug failure that allows a coolant leak to develop?

• A. Metal fatigue.

• B. Rusting.

• C. Engine vibration.

• D. Overheating.

Technician A says a 50/50 mix of antifreeze and water is commonly used to provide protection for most weather conditions. Technician B says that minimum coolant strength should be several degrees lower than the lowest normal temperature for the climate of the area. Who is right?

• A. A only.

• B. B only.

• C. Both A and B.

• D. Neither A nor B.

Which of the following is not a method used to cool an HV battery pack in a hybrid vehicle?

• A. Air cooling.

• B. Heat sink.

• C. Electric fan.

• D. Liquid cooling.

While discussing thermostat service, Technician A says a stuck thermostat can cause engine overcooling. Technician B says a stuck thermostat can cause engine overheating. Who is right?

• A. A only.

• B. B only.

• C. Both A and B.

• D. Neither A nor B.