auto 5.

which of the following is NOT true about the functions of an engine cooling system?

• it provides a means of warming the passenger compartment

• it removes engine heat

• it keeps the engine from reaching operating temperature too quickly

• it maintains a proper engine operating temperature

the temperature of the combustion flames can reach ____ F

• 2600

• 3200

• 3900

• 4500

the electric engine fan is controlled by _____.

• the timing belt

• an engine speed sensor

• a thermo switch

• a pressure sensor

typical radiator cap pressure in an automotive cooling system is ____ psi

• 7-10

• 12-16

• 18-20

• 20-26

the correct coolant/antifreeze mixture for use in most vehicles is____

• pure ethylene glycol

• 25% antifreeze/75% water

• 50% antifreeze/50% water

• pure water

when a thermostat is closed, which of these permits coolant circulation through the engine?

• bypass thermostat

• bypass valve

• both

• none of the above

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

• radiator

• engine block

• heater core

• thermostat housing

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

• metal fatigue

• rusting

• engine vibration

• overheating

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

• air cooling

• heat sink

• electric fan

• liquid cooling

which of the following is NOT a function of lubrication system?

• removing contaminants from inside engine

• reducing friction and wear between moving parts

• cutting power loss; increasing fuel economy

• maintaining smooth power flow through drivetrain