Other Skilled Trades Masonry 2

Question 1

What is the minimum required overlap (lap) for brick courses at corners and in running bond pattern?

Accepted Answer

1/3 of the brick length

Answer

Minimum 1/3 overlap of the brick length is required at courses to ensure proper load transfer and structural integrity in masonry walls.

Question 2

What material is used to create a control joint in a concrete block (CMU) wall to control cracking?

Accepted Answer

Rubber or foam backer rod with sealant

Answer

Control joints in CMU walls are created by raking out the mortar joint and filling with a backer rod and flexible sealant to allow for thermal movement.

Question 3

What is the primary purpose of cavity wall construction in masonry?

Accepted Answer

To provide a drainage plane and thermal break between wythes

Answer

A cavity wall creates a drainage plane between the outer and inner wythes, preventing moisture from crossing into the interior and improving thermal performance.

Question 4

Which ASTM standard governs the specification for mortar for unit masonry?

Accepted Answer

ASTM C270

Answer

ASTM C270 is the standard specification for mortar for unit masonry, defining the mix proportions and minimum properties for Types M, S, N, and O mortar.

Question 5

What is 'tuckpointing' in masonry repair?

Accepted Answer

Removing deteriorated mortar joints and filling with new mortar

Answer

Tuckpointing involves removing deteriorated mortar from joints to a depth of 3/4 inch and replacing it with fresh mortar to restore the wall's integrity and appearance.

Other Skilled Trades Practice Test

Other Skilled Trades Practice Test

Other Skilled Trades Masonry 2