Cooling Systems Quiz Level 2

What is the primary purpose of the coolant recovery system?

• To increase the engine temperature

• To recover coolant that might be lost during normal operation and heat soak

• To decrease the engine temperature

• To increase the pressure in the radiator

What occurs just after an engine that has been running at normal operating temperature is shut off?

• Cold soak

• Heat soak

• Pressure drop

• Coolant evaporation

What happens to the coolant temperature during heat soak?

• It decreases rapidly

• It remains constant

• It increases rapidly

• It evaporates

What is the function of the vacuum valve in the radiator cap?

• To increase pressure

• To release coolant

• To draw coolant from the overflow tank into the radiator

• To stop coolant flow

What is the function of the lower sealing gasket in the radiator cap?

• To increase the engine's temperature.

• To seal the radiator cap to the top of the radiator filler neck.

• To reduce the coolant pressure.

• To allow coolant to evaporate.

What is the boiling point of a 44% antifreeze solution at 16 PSI?

• 265°F

• 257°F

• 245°F

• 234°F

What drives the pulley attached to the impeller shaft hub in most vehicles?

• Timing belt

• Serpentine belt

• Chain drive

• Electric motor

What is the primary purpose of the thermostat in an engine?

• To increase engine power

• To regulate the coolant temperature

• To control fuel injection

• To monitor oil levels

What happens when the engine is cold in relation to the thermostat?

• The thermostat opens

• The thermostat closes

• The thermostat regulates fuel flow

• The thermostat increases engine speed

What happens to the thermostat as the coolant heats up to operating temperature?

• It closes

• It opens

• It regulates fuel flow

• It increases engine speed