24 Plumbing Design and Installation

The sources of plumbing codes adopted by local governments include:

• national model codes and local amendments

• only local traditions

• international treaties

• federal tax laws

The components of a water supply system are:

• Source, treatment, storage, distribution

• Source, electricity, roads, vehicles

• Treatment, agriculture, industry, recreation

• Storage, sewage, lighting, heating

The effects of gravity and water pressure in a plumbing system are best described as:

• Gravity helps water flow downward while water pressure pushes water through pipes.

• Gravity prevents water from moving in pipes and water pressure is not important.

• Gravity and water pressure have no effect on plumbing systems.

• Gravity causes water to flow upward and water pressure slows it down.

The functions of a drain-waste-vent system include:

• Removing wastewater and gases from a building

• Supplying fresh water to fixtures

• Heating water for domestic use

• Providing electrical power to appliances

The operation of a septic system involves which of the following processes?

• Wastewater is collected, separated, and treated in a tank before being dispersed into a drain field.

• Wastewater is incinerated and the ash is buried underground.

• Wastewater is filtered through sand and then released into a river.

• Wastewater is stored indefinitely in underground tanks without treatment.

Tools commonly used by plumbers include:

• Pipe wrench, plunger, pipe cutter, and plumber's tape

• Hammer, paintbrush, screwdriver, and chisel

• Measuring tape, trowel, paint roller, and saw

• Soldering iron, glue gun, stapler, and level

The three basic plumbing pipe materials and their variations are:

• Copper, plastic (PVC/CPVC), and steel (galvanized/black) pipes

• Aluminum, glass, and rubber pipes

• Wood, ceramic, and lead pipes

• Concrete, brass, and bamboo pipes

Different types of pipe fittings and their purposes are:

• Elbow, tee, reducer, and coupling are used to change direction, branch, reduce size, and connect pipes respectively.

• Pipe fittings are only used for decoration.

• Pipe fittings are used to increase water pressure only.

• Pipe fittings are only used in electrical wiring.

Fill in the blank: One function of a plumbing system is to ________ for homeowners and animals.

• supply fresh water

• provide electricity

• grow vegetables

• control temperature

Fill in the blank: Plumbing systems are used to remove ________ and other waste elements.

• wastewater

• freshwater

• oxygen

• nutrients