PVC – Study Session 3, 2026 – Review and practice material

PVC – Study Session 3, 2026 – Review and practice
material

When installed horizontally, 11/4-inch polypropylene pipe and tubing shall be supported at
maximum intervals of __________.

a. 32 inches

b. 48 inches

c. 8 feet

d. 10 feet

Reference __________ - ANS✔✔ b Table 308.5



A horizontal 4-inch PVC drainage pipe suspended from the ceiling requires ________ at a 90
degree turn.

a. axial restraints

b. sway bracing

c. coupling restraints

d. thrust blocks

Reference __________ - ANS✔✔ b Sec. 308.6



One-half-inch CPVC water pipe installed horizontally shall be supported at maximum intervals of
__________ feet.

a. 6

b. 5

c. 4

d. 3

Reference __________ - ANS✔✔ d Table 308.5

, Support hangers for 10-foot lengths of cast-iron soil pipe suspended from a ceiling shall be
spaced not more than __________ feet.

a. 2.5

b. 5

c. 7.5

d. 10

Reference __________ - ANS✔✔ d Table 308.5, Footnote a



PVC pipe installed vertically requires a guide installed midway between required supports for
pipe sizes __________ inch(es) and smaller.

a. 1

b. 3

c. 2

d. 11/4

Reference __________ - ANS✔✔ c Table 308.5, Footnote b



Which of the following is not specifically allowed for sealing around a pipe that passes through
an exterior wall?

a. flashing

b. caulk

c. foam sealant

d. gasketing system

Reference __________ - ANS✔✔ a Sec. 315.1



When located in a flood hazard area, the top of a potable water well casing without a sealed
cover shall extend not less than __________ inches above the design flood elevation.