Chapter 8 Cooling System Review

A liquid-cooled engine cooling system continuously circulated coolant throughout the engine. 

• True

• False

A radiator is a multi-channeled container that allows air to pass around the channels to remove heat from the liquid within.

• True

• False

Asperities are tiny projections from the machining process which produce surface roughness or unevenness.

• True

• False

Air-cooled small engines operate cooler than liquid-cooled or automobile engines.

• True

• False

Heat always flows from an area of lower temperature to an area of higher temperature.

• True

• False

Cast aluminum alloy engines and components have a higher degree of heat absorption than those made from cast iron alloy.

• True

• False

A pressurized cooling system produces a pressure lower than atmospheric pressure.

• True

• False

Lubrication of an engine helps to maintain proper operation by reducing friction and cooling internal engine components.

• True

• False

Oil film thickness increases with an increase in oil temperature.

• True

• False

Thermal growth is a heat-induced process causing a material to expand when heated with little or no return to its original size when cooled.

• True

• False