2018 IPC CH 9B Quiz

01. What is the minimum size required for a stack vent serving a 21/2-inch waste stack?

• a. 1-1/4 inches
• b. 1-1/2 inches
• c. 2 inches
• d. 2-1/2 inches

02. What is the minimum size required for a waste stack vent receiving the discharge of two drainage fixture units at each of three branch intervals?

• a. 1-1/4 inches
• b. 1-1/2 inches
• c. 2 inches
• d. 1/2 inches

03. Provided the total discharge for the stack is not exceeded, what is the maximum number of drainage fixture units allowed to discharge to a 3-inch-diameter waste stack vent in any one branch interval?

• a. two
• b. four
• c. eight
• d. unlimited

04. A common vent provides venting to __________ fixture(s).

• a. one
• b. two
• c. three
• d. four

05. The vent or branch vent for multiple island fixture vents shall extend to a minimum of __________ inches above the highest island fixture being vented before connecting to the outside vent terminal.

• a. 3
• b. 4
• c. 6
• d. 12

06. The maximum horizontal distance between a lavatory and the stack of a single stack vent system is __________ feet in developed length.

• a. 4
• b. 8
• c. 12
• d. 16

07. A 3-inch stack of a single stack vent system is permitted to serve a maximum of __________ water closets.

• a. two
• b. three
• c. four
• d. six

08. A relief vent is required when a circuit-vented branch receives the discharge of __________ and the branch connects to a drainage stack receiving drainage from above.

• a. 4 or more water closets
• b. 2 or more bathroom groups
• c. an automatic clothes washer
• d. more than 16 drainage fixture units

09. A circuit vent is prohibited from receiving any drainage, but a relief vent is permitted to be a fixture drain when the relief vent receives a discharge of not more than__________ drainage fixture units (dfus).

• a. 2
• b. 4
• c. 6
• d. 8

10. Which of the following fixtures is allowed to be vented by a combination waste and vent system?

• a. floor drain
• b. clinical sink
• c. urinal
• d. food waste disposer