2018 IPC CH 9A Quiz

01. The main purpose of venting is for __________.

• a. exhaust of sewer gases
• b. trap seal protection
• c. decreasing flow rates
• 1.       d. increasing flow rates

02. A vent piping system is necessary to prevent pressure differentials of more than __________ against the trap seal of any fixture.

• a. 1 inch of water column
• b. 1 foot of head
• c. 1 PSI
• 2.       d. 0.433 PSI

03. The vent system for a chemical waste system must __________.

• a. connect to the sanitary vent system above the highest fixture
• b. terminate through a wall to the outdoors
• c. be independent of the sanitary vent system
• 3.       d. terminate in a stack-type air admittance valve

04. Prefabricated lead flashings for vent pipe penetrations must have a sheet weight of not less than __________ pounds per square foot.

• a. 3.5
• b. 2.5
• c. 1.25
• 4.       d. 0.75

05. In a sanitary drainage system, what is the minimum number of vent pipes that are required to extend to the outdoors?

• a. one
• b. two
• c. one for each air admittance valve
• 5.       d. one for each vent stack or stack vent

06. A vent stack connection to the base of a stack is required to connect__________.

• a. above the lowest horizontal branch
• b. to the building drain
• c. at or below the lowest horizontal branch
• 6.       d. a minimum of 10 pipe diameters away from the stack

07. Where required to be protected against frost closure, the vent extension through the roof shall be not less than __________ inches in diameter beginning not less than __________ inches inside the thermal envelope.

• a. 4, 12
• b. 3, 12
• c. 3, 18
• 7.       d. 4, 6

08. Frost closure protection for vent terminals is required in which of the following locations?

• a. Denver, Colorado
• b. Juneau, Alaska
• c. Goodland, Kansas
• 8.       d. South Bend, Indiana

09. What is the minimum required height of a vent terminal located on a roof that serves as a sun deck?

• a. 1 foot
• b. 2 feet
• c. 7 feet
• 9.       d. 10 feet

10. A vent shall terminate a minimum of __________ feet horizontally from or at least __________ feet above a window opening.

• a. 8, 3
• b. 10, 3
• c. 8, 4
• 10.   d. 10, 4