AUT-101 Ch 16

When heat travels from one solid to another, it is known as ______.

• Convection

• Radiation

• Conduction

• Vaporization

Much of the heat produced during combustion is not used productively and must be removed to avoid overheating of the engine.

• True

• False

Technician A states that much of the heat produced during combustion is not used productively and must be removed to avoid overheating of the engine. Technician B states that the internal combustion engine relies on the heat of combustion to produce torque. Who is correct?

• Tech A

• Tech B

• Both A and B

• Neither A nor B

The automotive cooling system provides a means of transferring heat from the hot parts of the engine to ambient air.

• True

• False

Manufacturers use various cooling system configurations, but the basic concept is to _______.

• transfer excessive heat from hotter to cooler environments

• modify the volume of coolant to allow heat transfer

• transfer excessive heat from cooler to hotter environments

• modify the contents of a coolant to allow heat transfer

The coolant heat storage system:

• uses a condenser

• prevents the engine from overheating on hot days.

• increases hydrocarbon exhaust emissions.

• preheats the engine when the vehicle is started the next time.

______ have fallen out of favor in passenger vehicles because they are harder to maintain at a stable temperature, thereby increasingemissions output of the engine.

• Air-cooled engines

• Liquid-cooled engines

• Fuel-cooled engines

• None of the above

Many types of metals are used in the engine, such as _____, copper, and brass.

• Cast iron

• Aluminum

• Both

• Neither

__________ is a type of nontoxic antifreeze.

• Ethylene glycol

• Polyalkylene glycol

• Polyalphaolefin glycol

• Propylene glycol

Because the engine will overheat if gas pockets get stuck in the water passageways, the solution was to drill holes in the head for steam toescape and to run a tube from the head back to a surge tank, where the steam turns back into coolant and is recycled through the system.

• True

• False