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Flashcards in Modern Masonry Deck (67)
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1

In masonry work, what tool is used to make long horizontal joints?

Sled runner jointer

2

Five strecher courses of brick with one header course describes which of the following types of bonds?

Common

3

What type of brick is used in areas exposed to freezing, but not wet conditions?

MW

4

With masonry, what unit of measure is used in a modular grid system?

4" inches

5

What is the nominal size of a modular brick?

4" X 2 2/3" X 8"

6

Whan laying brick and all the vertical joints align, this is a:

Stacked bond

7

The nominal size of an 8 inch stretcher block is:

8 X 8 X 16

8

Which of the following is not a masonry mortar?

P

9

What is the white powder that forms in a masonry wall after exposure to moisture?

Efflorescence

10

What type of mortar joint is recommended in areas exposed to heavy rain and high winds?

V-shaped or Concave

11

Which CMU has the least pounds per cubic foot of concrete?

Pumice

12

What is the highest strength aggregate in an 8 X 8 X 16 CMU?

Sand and gravel

13

When figuring nominal dimensions, what is the intended size of the mortar joint for concrete masonry units?

3/8"

14

What is the advantage of a two core block CMU versus a three core block design?

Lighter, reduced heat conductor and more space for conduit

15

To prevent moisture from entering the top of a masonry wall, you should use:

Copings

16

What is the best stone to protect against moisture on sills?

Limestone

17

Wall ties in a brick masonry cavity wall should be placed what distance from either edge of the masonry unit?

5/8"

18

What type of lime is used in mortar?

Type S hydrated

19

What type of mortar is best suited for use below grade?

Type M

20

To avoid hardening due to hydration, mortar should be used within what time span after mixing?

2 1/2 hours

21

What type of mortar is used for interior non-load bearing partitions where high strength is not needed?

Type K

22

What is added to mortar for compressive strength?

Cement

23

Welded wire mesh for masonry should be lapped to what minimum distance?

One full wire grid spacing plus 2 inches

24

Typically, what is the most significant property of hardened mortar?

Bond strength

25

Where wind speeds can reach speeds of 80 mph, what type of mortar is used in a cavity wall?

Type S

26

With masonry, what gauge wire is ordinarily used for continuous horizontal joint reinforcement?

#8, #9, #10, & #11

27

What is the closest an adjustable truss type brick tie should be from the edge of the brick?

5/8"

28

What tool is used to cut brick when the cut edge will be hidden by the mortar?

Brick hammer

29

Which masonry joint provides the best moisture protection?

Tooled (Concave or V Joint)

30

When laying brick, the leads are:

The corners