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Contractor Exam > Modern Masonry > Flashcards

Modern Masonry Flashcards

1
Q

What is a sled runner?

A

Used by masons to finish mortar joints

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2
Q

What is used to cut masonry?

A

Industrial diamond or carbide tipped blades

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3
Q

Definition of building brick?

A

common brick are used chiefly as structural material where durability and strength are more important than appearance

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4
Q

When is it appropriate to use Grade SW Brick?

A

brick highly resistant to frost

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5
Q

When is it appropriate to use Grade MW Brick?

A

where there may be exposure to temperatures below freezing, but where not likely to be permeated with water

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6
Q

Grade NW Brick?

A

is brick designed to be used as a backup on interior masonry

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7
Q

When do you use Facing brick?

A

used on exposed surfaces where appearance is an important consideration

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8
Q

What type of brick are identical to facing brick but have a larger core area?

A

Hollow Brick

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9
Q

Pedestrian and Light Traffic Paving Brick?

A

intended for use as a paving material to support pedestrian and light vehicular traffic

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10
Q

What is Heavy Vehicular Paving Brick intended for?

A

intended for heavy traffic and equipment applications

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11
Q

units with a glaze fused to the body; used as a facing brick?

A

Ceramic Glazed Brick & Glazed Brick Single Fired

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12
Q

Thin brick?

A

thin brick veneer units are fired clay with normal face dimensions but a reduced thickness

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13
Q

What is brick durability affected by?

A

heat, wetting, drying, and soluble salts

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14
Q

What is efflorescence?

A

on masonry walls this is caused by soluble salts in wet brick being carried to the surface as water evaporates

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15
Q

Running bonds in masonry is what?

A

consists of all stretchers and is used largely in cavity walls and veneer construction

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16
Q

common bond or American bond?

A

a variation of the running bond. It has course of full-length headers at regular intervals generally every fifth to seventh course, to provide structural bonding as well as pattern

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17
Q

What are Flemish bonds in masonry?

A

alternates courses of stretchers and headers. headers in alternate courses are centered over the stretchers in the course between them

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18
Q

What are English bonds in masonry?

A

made of alternate courses of headers and stretchers. the headers are centered on the stretchers and joint between the stretchers in all courses are aligned vertically

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19
Q

Block or Stack Bond

A

is purely a pattern bond. all vertical joints are aligned. There is no overlapping of units. The block or the stack bond is the weakest part

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20
Q

How is a mortar joint very effective in resisting rain penetration?

A

concaved and tooled mortar joints

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21
Q

Most popular mortar joint?

A

concave mortar joint

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22
Q

FTX Unglazed Facing Tile is known for?

A

a high degree of mechanical perfection

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23
Q

How much does a 8x8x16 CMA (sand and gravel) weigh?

A

40 lbs

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24
Q

Actual size of a 8x8x16 CMU is?

A

7 5/8” x 7 5/8” x 15 5/8”

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25
Q

which block is typically stronger? two core block or three?

A

two core

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26
Q

When do you typically use two core block?

A

when reinforcing bars must align in the core holes

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27
Q

Masonry glass block joints are typically ____ on all sides?

A

1/4” on all sides

28
Q

What is an excellent sill material that can be used on exterior masonry walls? WHy?

A

Limestone; one piece ensures better protection against water leakage

29
Q

Basic mortar ingredients include?

A

Portland cement, hydrated lime and sand

30
Q

re-tempering mortar is done how?

A

add water to make more workable

31
Q

Mortar should be discarded after how many hours after mixing?

A

2.5 hours after

32
Q

How do you make mortar stronger?

A

Compressive strength of mortar increases as cement content is increased

33
Q

What is most significant property of hardened mortar but also most difficult to predict?

A

Bong strength

34
Q

When do you use Type M Mortar?

A

used for reinforced masonry below grade and in contact with earth; foundations, retaining walls, walks, sewers, and manholes

35
Q

When do you use Type S Mortar?

A

STRENGTH WIND used for reinforced masonry where maximum flexural (bending) strength is required AND/OR when wind speed exceed 80 mph

36
Q

Three types of ties:

Unit ties?

A

rectangular anchors used in cavity wall construction

37
Q

When do you use Z ties?

A

in concrete block wall construction

38
Q

When do you use a Corrugated tie?

A

used to anchor brick veneer facing walls to studs

39
Q

All reinforcing rods or bars used in masonry walls must have how much mortar coverage?

A

5/8 of an inch

40
Q

When is a strap anchor used?

A

to connect a partition wall to a bearing wall

41
Q

cutting brick with a brick hammer is used when?

A

when the cut edge will be hidden by the mortar

42
Q

What is used to ensure height of each course or block or brick?

A

a corner pole or a story pole

43
Q

Where do you place wall ties in the mortar?

A

5/8 of an inch from either edge of the masonry unit

44
Q

How do you clean brick?

A

use diluted Hydrochloric Acid (HCL)

45
Q

When sand blasting a masonry wall the pressure should be?

A

60-100 p.s.f

46
Q

Most common air-space for a cavity wall?

A

2 inches

47
Q

corrugated metal ties: when are they used?

A

used in residential veneer construction to anchor the veneer to frame or masonry backing

48
Q

Position Block (CMU’s) in a wall with the wide flange on the top to provide what?

A

a wider space for the bed joint

49
Q

What do you use to make sure that the mason’s line does not sag?

A

a Trig

50
Q

How far do you hold a mason’s line away from the block or brick?

A

1/16”

51
Q

When is a full mortar bed used?

A

to ensure a good bond between the footing and the bed course

52
Q

A full mortar bed is furrowed with?

A

a trowel

53
Q

What size diameter bar is usually used in what size concave mortar joint?

A

a 5/8” diameter bar is usually used for a 3/8” concave mortar joint

54
Q

What should be sealed with caulking compound after the mortar has been raked out to a depth of 3/4”?

A

control joints

55
Q

How far do you parge the wall from the footing to above the finish grade line?

A

6”

56
Q

What is a curtain wall in masonry?

A

a self-supported (non-bearing) wall

57
Q

an expansion joint on the outside wythe must be spaced no farther then ___ ft apart?

A

50

58
Q

Materials used for lintels?

A

concrete, cast stone, stone, steel

59
Q

Jack Arch Construction: is relatively weak and should be supported by steel if the opening is over __ ft wide?

A

2 ft wide

60
Q

What are the overlap requirements for Sheets of welded wire?

A

AT LEAST ONE FULL STAY SPACING PLUS 2 INCHES

61
Q

concrete wearing surface like terazzo toppings on outdoor slabs are generally how thick?

A

1/2 thick

62
Q

Tuckpointing is what?

A

filling in cut out or defective mortar joints in masonry with fresh mortar

63
Q

what is a stretcher brick?

A

bricks that lie with its longest side parallel to the face of the work.

64
Q

what is a header brick?

A

brickwork in which all the bricks are laid as headers is referred to as header course.

65
Q

what is a bed joint?

A

the bed is the horizontal layer of mortar where brick or stone units are laid.

Contractor Exam (8 decks)

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