Chapter 8: Water Heating

Heating potable water for domestic purposes such as bathing and cleaning is a relatively new practice.

• True

• False

Convection is heat transfer that occurs when currents circulate between the warm and cool regions of a fluid.

• True

• False

A water heater is a plumbing appliance heat source that incorporates limiting controls for heating water up to 300°F (149°C).

• True

• False

A pressure-reducing valve normally is set to activate when pressures within a tank exceed 100 psi (689.5 kPa).

• True

• False

Sunburn is a good example of a second-degree burn.

• True

• False

The most commonly used types of insulation for hot water piping is fibrous glass and flexible tubing insulation.

• True

• False

Gravity circulation is the circulation of water based on the use of a mechanical pump.

• True

• False

In the 2015 UPC, ___ water is water at a temperature higher than or equal to 120°F (49°C).

• scalding

• hot

• tempered

• superheated

An increase in the volume of water produced by thermal expansion creates a corresponding rise in ___.

• pressure

• pollution

• friction

• flow rate

The coefficient of thermal expansion is the unit increase or decrease in the length of a material per ___°F increase or decrease in temperature.

• 1

• 2

• 5

• 10