Exam 21: Cooling System Operation and Diagnosis

Technician A says that cooling fans are designed to draw air through the radiator to aid in the heat transfer process. Technician B says that drawing the heat from the coolant transfers this heat to the outside air through the radiator. Who is right?

What can be done to prevent air from getting trapped in the cooling system when the coolant is replaced?

In this drawing of a radiator cap, what is occurring within the cooling system?

The water pump uses which of these reactionary forces actions to circulate the coolant?

A water pump is a positive displacement-type pump.

Technician A says that the automotive water pump is a positive displacement-type pump. Technician B says that the coolant mix should be a 50/50 split between antifreeze and water. Who is right?

An automotive engine that running at too high of a temperature will have which of these?

Which one of these areas is the water jacker?

What diagnostic trouble code (DTC) could be set if the thermostat is defective?

Water pumps ________.

A 5 ribbed serpentine belt should be tensioned at about ________.

Pressurizing the automotive cooling system results in ________.

Heat transfer is improved from the coolant to the air when the ________.

Technician A says that the radiator should always be inspected for leaks and proper flow before installing a rebuilt engine. Technician B says that overheating during slow city driving can be caused by a defective electric cooling fan. Who is right?

For every one PSI increase in cooling system pressure, the coolant's boiling point is raised how many degrees F?

The use of a coolant recovery machine is helpful in preventing ________ from entering the cooling system.

The normal operating temperature (coolant temperature) of an engine equipped with a 195°F thermostat is ________.

If a cooling system operates at too cool of a temperature, the engine will ________.

Technician A says that the purpose and function of the cooling system is to maintain proper engine operating temperature. Technician B says that the water pump controls engine coolant temperature by opening at its rated opening temperature to allow coolant to flow through the radiator. Who is right?

Electric cooling fans are typically commanded on and off by the ________.