Question 1

Cleanout doors should be installed _____ .&#10;A) over the third course on a brick structure above grade&#10;B) over the first course on a brick structure above grade&#10;C) over the second course on a block structure&#10;D) over the third course on a block structure

Accepted Answer

Cleanout doors should be installed over the third course on a brick structure above grade to allow for proper access and maintenance.

Question 2

Which of the following statements is correct regarding building code requirements for residential chimneys?&#10;A) Chimney wall thickness should be a nominal 4&#34; when no flue liner is used.&#10;B) Masonry chimneys should not be corbeled out more than 6 inches from a wall.&#10;C) Chimney clearance from combustible materials is a minimum of 4 inches.&#10;D) The minimum chimney height for fire safety is the 2 feet above the roofline.

Accepted Answer

Masonry chimneys should not be corbeled out more than 6 inches from a wall to ensure structural stability and safety.

Question 3

Chimneys should be built on solid concrete footings that have been poured above the frost line.

Accepted Answer

Chimneys should be built on solid concrete footings that are poured below the frost line to prevent shifting and cracking due to frost heave.

Question 4

Which of the following statements is true regarding chimney construction?&#10;A) Because of the height and width of a chimney, mistakes are not noticeable.&#10;B) Slightly cracked flue linings can be used in the chimney.&#10;C) The flue lining should not be cut with a masonry saw.&#10;D) All joints must be uniform in size.

Accepted Answer

All joints in chimney construction must be uniform in size. This is important for proper airflow and to avoid issues with draft and smoke leakage. A and B are incorrect because mistakes and cracked flue linings can lead to safety hazards. C is incorrect because it is acceptable to cut flue lining with a masonry saw if done correctly.

Question 5

Which of the following statements is true about masonry used for chimneys?&#10;A) Old or used soft brick are acceptable for the outside face of the chimney.&#10;B) Soft brick should be used near the hot part of the flue.&#10;C) Concrete masonry units should not be used for chimneys.&#10;D) Any hard, fired masonry unit can be used to build a chimney.

Accepted Answer

Hard, fired masonry units are suitable for building chimneys because they can withstand the high temperatures and corrosive gases typically found in chimney flues. Soft bricks and concrete masonry units are not recommended for use in areas exposed to high heat or direct flame contact due to their lower thermal resistance and potential for degradation.

Question 6

Terra-cotta is not an acceptable material for flue linings.

Accepted Answer

Terra-cotta, also known as clay tile, is a traditional and commonly used material for flue linings in masonry chimneys due to its ability to withstand high temperatures and corrosive byproducts of combustion.

Question 7

When the chimney is completed, you should check to make sure that the chimney creates a good draft.

Accepted Answer

Checking the draft of a chimney is important to ensure that it is working properly and safely. A good draft helps to draw the smoke and gases out of the chimney, which prevents them from entering the home and causing health and safety issues. Checking the draft can be done with a simple smoke test or by hiring a professional chimney sweep to inspect the chimney.

Question 8

An appliance chimney can serve more than one heat source.

Accepted Answer

An appliance chimney can serve multiple heat sources, such as connecting a wood stove and a gas furnace to the same chimney. However, each heat source must have its own flue pipe leading into the chimney to prevent exhaust gases from mixing and creating a potential fire hazard.

Question 9

A _____ is defined as a round terra-cotta or fired clay insert that fits into the flue lining from the heating source acting as a sleeve in the chimney to receive the furnace or stove pipe.&#10;A) flue ring&#10;B) thimble&#10;C) receptacle&#10;D) sock

Accepted Answer

The described object is a known as a thimble in chimney vocabulary.

Question 10

_____ masonry cement is generally accepted for house chimneys.&#10;A) Type S&#10;B) Type O&#10;C) Type N&#10;D) Type M

Accepted Answer

Type N masonry cement is generally used for house chimneys due to its medium strength and good workability, making it suitable for above-grade, exterior, and interior load-bearing installations.

Question 11

When installing a wood stove to a one-flue chimney, the cleanout doors should be located _____ below the inlet.&#10;A) approximately 2'&#10;B) no less than 3'&#10;C) no more than 1'&#10;D) at least 3'

Accepted Answer

The answer of When installing a wood stove to a...

Question 12

The flue lining should project _____ above the last course of masonry Chapters laid on the chimney.&#10;A) less than 4 &#34;&#10;B) exactly 5&#34;&#10;C) approximately 6&#34;&#10;D) no less than 8&#34;

Accepted Answer

The answer of The flue lining should project _____ above...

Question 13

______ is a piece of flat metal that will not rust or deteriorate that covers the point at which the chimney and roof meet.&#10;A) Flashing&#10;B) Corbeling&#10;C) Capping&#10;D) Coping

Accepted Answer

The answer of ______ is a piece of flat metal...

Question 14

Which of the followings statements regarding chimney sealant is correct?&#10;A) Silicone caulk should not be used as a chimney sealant.&#10;B) Oil-based sealants should be used for chimneys.&#10;C) Caulking is often used to hide poor workmanship.&#10;D) Priming is not necessary prior to using a sealant on a chimney.

Accepted Answer

The answer of Which of the followings statements regarding chimney...

Question 15

All wood or other flammable materials should be kept at least 2&#34; from chimneys to prevent any chance of fire.

Accepted Answer

The answer of All wood or other flammable materials should...

Deck 32: One-Flue Chimneys