Chapter 5 - chimneys and vents

Question 1

Chimney entrance. Connectors shall connect to a masonry chimney flue at a point not less than ______ above the lowest portion of the interior of the chimney flue.

Answer 1

12”

Question 2

Masonry chimney flues shall be provided with a cleanout opening having a minimum height of:

Answer 2

6 inches

Question 3

The upper edge of the opening shall be located not less than _____ below the lowest chimney inlet opening.

Answer 3

6 inches

Question 4

Venting system shall not extend into or pass through any

Answer 4

Fabricated, air duct or furnace Plenum

Question 5

Chimneys shall extend _____ above the highest connected appliance, draft hood, or flue collar

Answer 5

5 feet

Question 6

The locations of gas vents shall comply with table?

Answer 6

503.6.5

Question 7

Single wall metal pipe shall be constructed of galvanized sheet steel, not less than

Answer 7

0.0304 inches thick

Question 8

Single wall metal pipe shall not originate in any unoccupied attic or concealed space and shall not pass through

Answer 8

Any attic, inside wall, concealed space or floor

Question 9

Where the vent connector used for an appliance having a draft hood or a category, one appliances located in or passes through attics, crawlspaces, or other unconditioned spaces that portion of the vent connector shall be listed as

Answer 9

Type B or type L

Question 10

A vent connector shall be installed without drips or sags and shall slope upward toward the vent or chimney, not less than

Answer 10

1/4 inch per foot

Question 11

The maximum horizontal length of a single wall connector shall be ____ of the height of the chimney or vent

Answer 11

75%

Question 12

The maximum horizontal length of a type B double wall connector shall be ______ the height of the chimney or vent

Answer 12

100%

Question 13

How far above the bottom of the wall furnace, in vertical feet, must a Type B-W gas vent terminate?

Answer 13

12 feet

503.6.6 Minimum height

Question 14

Where steel shield plates are required to protect vents in a concealed location from physical damage, what is the minimum required thickness?

Answer 14

No. 16 gauge

Question 15

How many feet must single-wall metal pipe terminate vertically above the highest draft hood outlet for an appliance?

Answer 15

5 feet

503.7.3 Termination

Question 16

For cleaning, inspection, and replacement, a vent connector must be provided with ________ for its entire length.

Answer 16

Ready access

503.10.12 Inspection

Question 17

If a gas vent terminates 8 feet or less from a vertical wall, the termination must be at least ________ feet above any part of a building that is 10 feet or less from it.

Answer 17

2 feet

503.6.5 Gas vent terminations

Question 18

A noncombustible, nonventilating thimble is required when a single-wall metal pipe passes through a roof made of combustible material, extending at least 6 inches below the roof, and a minimum of ________ inches above.

Answer 18

18

503.7.5 Roof penetrations.