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Contractors Exam > Modern Masonry > Flashcards

Modern Masonry Flashcards

1
Q

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

A

Sled runner jointer

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2
Q

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

A

Common

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3
Q

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

A

MW

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4
Q

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

A

4” inches

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5
Q

What is the nominal size of a modular brick?

A

4” X 2 2/3” X 8”

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6
Q

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

A

Stacked bond

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7
Q

The nominal size of an 8 inch stretcher block is:

A

8 X 8 X 16

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8
Q

Which of the following is not a masonry mortar?

A

P

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9
Q

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

A

Efflorescence

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10
Q

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

A

V-shaped or Concave

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11
Q

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

A

Pumice

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12
Q

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

A

Sand and gravel

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13
Q

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

A

3/8”

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14
Q

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

A

Lighter, reduced heat conductor and more space for conduit

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15
Q

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

A

Copings

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16
Q

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

A

Limestone

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17
Q

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

A

5/8”

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18
Q

What type of lime is used in mortar?

A

Type S hydrated

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19
Q

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

A

Type M

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20
Q

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

A

2 1/2 hours

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21
Q

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

A

Type K

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22
Q

What is added to mortar for compressive strength?

A

Cement

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23
Q

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

A

One full wire grid spacing plus 2 inches

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24
Q

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

A

Bond strength

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25
Q

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

A

Type S

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26
Q

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

A

8, #9, #10, & #11

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27
Q

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

A

5/8”

28
Q

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

A

Brick hammer

29
Q

Which masonry joint provides the best moisture protection?

A

Tooled (Concave or V Joint)

30
Q

When laying brick, the leads are:

A

The corners

31
Q

What is the recommended air pressure setting when sandblasting brick with a 1/4” nozzle?

A

60 - 120 lbs

32
Q

What is the best cleaning agent for brick?

A

Hydrochloric or muriatic acid

33
Q

What is a two-wythe wall allowing each wythe to react independently to stress known as?

A

A cavity wall

34
Q

What is the most common cavity size of a two-wythe wall?

A

2”

35
Q

Foundation walls that are being damp-proofed should be parged how many inches above the finish grade?

A

6”

36
Q

What is used to anchor masonry brick veneer to the structure?

A

Corrugated metal ties

37
Q

Blocks are positioned in a wall:

A

Wide flange up

38
Q

What are masonry exterior non-load bearing walls that are not wholly supported at each story?

A

Curtain walls

39
Q

The maximum height of grout lifts is usually:

A

5’

40
Q

Concrete pours of how high can be consolidated by rodding or vibration?

A

12”

41
Q

What diameter bar is used to make a 3/8” concave mortar joint?

A

5/8”

42
Q

Per 100 sq ft, using a 3/8’ mortar joint, you will need how many brick and how many cubic feet of mortar?

A

655 brick and 5.8 cubic feet of mortar

43
Q

How long must the outer wythe of a cavity wall be on each side of an external corner before expansion joints are recommended?

A

50’ or more in length

44
Q

Brick that will come into contact with ground water and freezing conditions should be type:

A

SW

45
Q

What percentage of a brick must be solid for it to be considered solid?

A

75%

46
Q

What type of facing tile is used when a high degree of mechanical perfection is required?

A

FTX unglazed

47
Q

What is the weight of an 8 x 8 x 16 Concrete Masonry Unit (CMU) made of sand and gravel?

A

40 lbs

48
Q

A standard glass block mortar joint is how thick?

A

1/4”

49
Q

What is mortar mainly composed of?

A

Portland cement

50
Q

What is the primary aggregate used in mortar?

A

Sand

51
Q

How many cubic feet of mortar are required for a single wythe brick wall that measures 200 sq feet, has 3/8” mortar joints and has 655 non-modular brick units per 100 square feet?

A

11.6 cubic feet

52
Q

Masonry walls that intersect may be connected by what means?

A

Strap anchor

53
Q

When sandblasting, what size nozzle should be used?

A

1/4”

54
Q

When using 9 gage ties in a composite wall, what is the proper separation of ties?

A

One for every 2 2/3 square feet

55
Q

When laying block, what distance should be maintained from the mason’s line?

A

1/16”

56
Q

When laying an 8”concrete block wall, a trowel is used to:

A

Spread and furrow a full mortar bed

57
Q

The lead corner is usually laid up how many courses high?

A

Four or five

58
Q

A masonry veneer will not:

A

Support loads

59
Q

What masonry structural member is placed over an opening in a wall used to support the loads above that opening?

A

Lintel

60
Q

How thick are terrazzo toppings typically?

A

1/2”

61
Q

What type of footings are used for free standing columns or piers?

A

Isolated

62
Q

Which brick pattern is considered the weakest bond?

A

Stacked bond

63
Q

What type of CMU is commonly used with reinforcement?

A

Two-core

64
Q

For Portland cement mixtures, what are the minimum cubic yards of cement required for 6 cubic yards of sand?

A

One cubic yard

65
Q

This type of joint is made in masonry by raking out the mortar ¾” and sealing with a caulking compound.

A

Control joint

66
Q

If a jack arch is over ___ feet wide, it should be supported by steel.

A

Two

67
Q

What is filling voids in masonry with fresh mortar known as?

A

Tuck Pointing

Contractors Exam (12 decks)

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