InterNACHI Fireplaces, Chimneys & Solid Fuel Appliances

Question 1

What is the minimum height a masonry chimney must extend above a flat roof or a roof with a pitch less than 2:12?

Accepted Answer

3 feet above the roof penetration point

Answer

Per the 2-3-10 rule, a chimney must extend at least 3 feet above the highest point where it passes through the roof.

Question 2

Creosote found in a chimney flue is a byproduct of:

Accepted Answer

Incomplete combustion of wood in a fireplace or stove

Answer

Creosote is a flammable, tar-like byproduct of incomplete wood combustion that accumulates inside flue liners and poses a chimney fire risk.

Question 3

What is the primary purpose of a chimney damper?

Accepted Answer

To seal the flue when the fireplace is not in use

Answer

The damper is a movable plate located in the throat of the fireplace that closes the flue when not in use to prevent heat loss and block outside air infiltration.

Question 4

According to InterNACHI standards, which component on a chimney directs water away from the junction of the chimney and a sloped roof?

Accepted Answer

Saddle (cricket)

Answer

A saddle or cricket is a peaked structure built behind a wide chimney on a sloped roof to divert water away and prevent pooling and leakage.

Question 5

What is the most common material used to line a masonry chimney flue in residential construction?

Accepted Answer

Clay tile (terracotta)

Answer

Clay tile flue liners are the most commonly installed liner type in masonry chimneys because they are durable, heat-resistant, and cost-effective.

(InterNACHI) International Association of Certified Home Inspectors Practice Test

(InterNACHI) International Association of Certified Home Inspectors Practice Test

InterNACHI Fireplaces, Chimneys & Solid Fuel Appliances