Plastic Pipe and Fittings

.An advantage of using plastic pipe in plumbing installations is that plastic _____

• is flame retardant

• burns without fumes

• adjusts easily to temperature changes

• requires little maintenance

A disadvantage of using plastic pipe in plumbing installations is that the solvent chemicals used to join the pipes _____.

• are expensive

• cannot be stored for long periods

• decrease in flexibility over time

• emit toxic fumes

Long chains of molecules that manufacturers can mold, cast, or force through a die into desired plastic shapes are called _____.

• pigments

• polymers

• core walls

• chamfers

A plumber heats a plastic pipe, softens it, shapes it, and then lets it cool. After it is hardened, the plumber realizes that the pipe needs to be bent to a greater angle. After reheating the pipe, the plumber discovers that the pipe will no longer soften. The pipe material is most likely _____

• thermoplastic

• thermoset

• solid wall

• cellular core wal

Larger SDR numbers on a plastic pipe indicate _____.

• smaller inside pipe diameter and thinner pipe walls

• smaller inside pipe diameter and thicker pipe walls

• larger inside pipe and thinner pipe walls

• larger inside pipe and thicker pipe walls

Most plumbing codes designate the minimum size of plastic pipe for use in or under buildings as Schedule _____.

• 20

• 30

• 40

• 50

A type of plastic pipe that cannot be used for hot and cold water distribution is _____

• ABS

• CPVC

• PEX

• PB

A disadvantage of PVC plastic pipe is that it _____

• has a limited life span

• can be weakened by chemicals

• is sensitive to sunlight

• is heavy

Water supply fittings are designed so they have a _____

• short radius with ledges

• short radius without ledges

• long radius with ledges

• long radius without ledges

Horizontal hangers can be attached to wooden structures with _____

• beam clamps

• friction clamps

• bolts

• . lag screws