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TONY: NC Contractor Exam > Masonry > Flashcards

Masonry Flashcards

1
Q

Which of the below brick would be good for cold weather but not real wet conditions?

A

MW brick (moderate weathering)

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2
Q

What is the minimum that adjustable assemblies should be from the edge of brick using truss type reinforcing wire?

A

5/8 inch

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3
Q

– What type of cement-lime mortar should be used to achieve 1,800 psi average compressive strength at 28 days?

A

Type S

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4
Q

Continuous horizontal joint reinforcement is ordinarily made from which gauge wire (AWG)?

A

8, 9, 10, or 11

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5
Q

Which of the below should be used when cleaning new masonry work?

A

Muriatic acidHydrochloric or Muriatic acid may not be answer given, could be Phosphoric Acid or TSP (Trisodium Phosphate).or sandblasting.

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6
Q

Which of the below tools would a mason use to cut a brick that was going to be hidden on the inside by mortar?

A

Brick hammer

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7
Q

Which of the below would be the most weatherproof mortar joint?

A

Concave

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8
Q

Which of the below is the most significant property of hardened mortar but also the most difficult to predict?

A

Bonding strength

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9
Q

The air space for a 2 Wythe cavity wall should be between 1” and 4”, what is the most common?

A

2 inch

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10
Q

The filling in with fresh mortar of cut out or defective mortar joints would be which of the below terms?

A

Tuck-pointing

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11
Q

A brick bond where all units line up vertical over each other would be which of the below?

A

Stack bond

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12
Q

Which of the below brick bonds would be the weakest?

A

Stack bond

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13
Q

The wide flange of block is located where:

A

Top

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14
Q

A masonry block weighs:

A

40 lbs normal, 35 lbs lightweight (actually light-weight is 22 pounds)

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15
Q

When laying masonry, how far should you keep off string line?

A

1/16 inch

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16
Q

Unused mortar for glass masonry unit shall be discarded within _______ after initial mixing.

A

90 min

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17
Q

When should concrete masonry units be wetted down?

A

Never

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18
Q

Five stretcher courses of brick with one header course indicate which of the following types of bonds?

A

Common

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19
Q

The nominal size of an 8 inch stretcher block is?

A

8 x 8 x 16

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20
Q

Which of the following is not a masonry mortar type?

A

P

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21
Q

Which of the following is not part of a masonry arch?

A

Quantum – quantities or amounts

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22
Q

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

A

5/8 inch

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23
Q

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

A

One full wire grid spacing plus 2 inches

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24
Q

Which masonry joint finish generally provides the best moisture protection?

A

Tooled

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25
Q

Foundation walls that are being damp proofed should be parged to a height of ___inches above finish grade.

A

6 inches

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26
Q

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

A

TRUE

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27
Q

A brick bond where there are alternate rows of stretcher and header rows are called:

A

English

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28
Q

Which of the below would be an advantage of a 2 core masonry block.

A

1 – Center web is thicker 2 – Block is 4 pounds lighter 3 – More interior space for conduits 4 – All of the above

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29
Q

What material is best used for exterior window sills?

A

Limestone

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30
Q

When laying a masonry wall, the corner leads shall be laid up at least 4 or 5 courses above the center of the wall.

A

TRUE

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31
Q

A control joint in a masonry wall should be sealed with a caulking compound after the mortar joint has been raked out to a depth of ___ inch.

A

3/4 inch

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32
Q

A curtain wall is a non-bearing wall that supports themselves.

A

TRUE

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33
Q

A jack arch needs to be supported by steel if the opening is over ____feet wide.

A

2 feet

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34
Q

Four inch WWM (welded wire mesh / reinforcement) shall be lapped a minimum of:

A

6 inches

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35
Q

The clear distance between vertical reinforcing bars in masonry columns shall be a minimum:

A

1 ½ times the bar diameter

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36
Q

Which ingredient, when increased, which add to the compressive strength of mortar?

A

Cement

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37
Q

Which type of portland cement is best used in a drainage structure with exposure to moderate sulfate concentrations?

A

Type II

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38
Q

When estimating for new construction of concrete masonry what is the nominal mortar joint width to use?

A

3/8 inch

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39
Q

When mixing fine grout, what is the ratio of sand to cement (or how many bags of sand to bags of cement are required)?

A

3:01

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40
Q

Which of the following brick patterns (bonds) would require more time and material to perform?

A

Basket weave

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41
Q

When mixing one cubic feet (one bag) of cement when mixing mortar, how much sand would be required?

A

3 cubic feet

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42
Q

Which of the following masonry joint would give you the most water tight wall?

A

Concave

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43
Q

What is the actual size (measurements) of an 8 inch x 8 inch x 16 inch masonry block?

A

7 5/8 inch x 7 5/8 inch x 15 5/8 inch

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44
Q

When using a common bond pattern on brick work, how many running bonds are there between the header courses?

A

5

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45
Q

Which of the following would not be the proper terminology when referring to brick arches?

A

Jewel

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46
Q

What best describes “tuckpointing”?

A

the process on filling in defective mortar joints with fresh (new) mortar

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47
Q

When using reinforcing wire in concrete (masonry) block, what is the normal course separation between the reinforcement?

A

16 inches – 2 courses

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48
Q

What is the most common type of Portland cement used in the construction field?

A

Type I

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49
Q

If you have a brick bond that alternates stretchers and headers, with the headers in alternate courses centered over the stretcher courses above and below. What would this pattern of brick be known as?

A

– Flemish bond with header

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50
Q

What would be the proper consistency of mortar when actually performing the masonry work?

A

Mortar that has not started to set up yet

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51
Q

When using 10 feet sections of block reinforcing material, what would be the normal lapage or splice when spliced together?

A

6 inches

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52
Q

When referring to masonry, what best describes a Wythe?

A

A continuous vertical section of masonry one unit in thicknessRemember if you have an estimating question on quantities of bricks/blocks in wall Wythes, if the wall is more than one wythe wide, multiply the quantities by the number of Wythes specified on the question

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53
Q

What is masonry mortar made up of?

A

Cement, hydrated lime, sand and water

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54
Q

Corrugated masonry anchors shall have a minimum thickness of:

A

22 gauge

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55
Q

What is the minimum size of a masonry weep hole?

A

3/16 inch

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56
Q

What is the weight of an 8 inch x 8 inch x 16 inch normal block?

A

40 pounds

57
Q

When sandblasting brick, the compressor should be capable of producing a range of 60 to 120 pounds per square inch (PSI)?

A

TRUE

58
Q

58 – What percent of a masonry block is to be filled with mortar to be considered solid filled?

A

75%

59
Q

59 – What is the average compressive strength of Type M cement-lime mortar?

A

2500 psi

60
Q

60 – What is the type of cement-lime mortar with average compressive strength of 2500?

A

Type M

61
Q

61 – Why is there a 2 ½ hour limit on using masonry mortar?

A

Mortar loses workability due to hydration

62
Q

62 – Which type of brick bond is needed when laying a chimney?

A

Running bond

63
Q

63 – What is the maximum height for a masonry column?

A

12 feet

64
Q

64 – What is the average minimum compressive strength of Type S masonry cement?

A

1800

65
Q

65 – In masonry construction, what goes over top of door and window openings?

A

Lintels

66
Q

66 – When using 6 bags of sand, how many bags of fine grout is required?

A

2

67
Q

67 – Which of the below best describes a brick veneer wall?

A

Carry’s own weight

68
Q

68 – What is the most important quality for hardened masonry?

A

Bonding strength

69
Q

69 – What is the standard bed and head joint in masonry?

A

3/8 inch

70
Q

70 – When cleaning masonry with sandblasting, what is the pressure used?

A

60 to 120 psi

71
Q

71 – What is true about a masonry veneer wall?

A

Building frame structure is erected first

72
Q

72 – What type of block in best used for reinforcing steel?

A

2 core

73
Q

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

A

Sled runner jointer

74
Q

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

A

Common

75
Q

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

A

MW

76
Q

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

A

4” inches

77
Q

What is the nominal size of a modular brick?

A

4” X 2 2/3” X 8”

78
Q

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

A

Stacked bond

79
Q

The nominal size of an 8 inch stretcher block is:

A

8 X 8 X 16

80
Q

Which of the following is not a masonry mortar?

A

P

81
Q

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

A

Efflorescence

82
Q

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

A

V-shaped or Concave

83
Q

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

A

Pumice

84
Q

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

A

Sand and gravel

85
Q

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

A

3/8”

86
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

87
Q

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

A

Copings

88
Q

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

A

Limestone

89
Q

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

A

5/8”

90
Q

What type of lime is used in mortar?

A

Type S hydrated

91
Q

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

A

Type M

92
Q

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

A

2 1/2 hours

93
Q

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

A

Type K

94
Q

What is added to mortar for compressive strength?

A

Cement

95
Q

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

A

One full wire grid spacing plus 2 inches

96
Q

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

A

Bond strength

97
Q

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

A

Type S

98
Q

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

A

8, #9, #10, & #11

99
Q

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

A

5/8”

100
Q

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

A

Brick hammer

101
Q

Which masonry joint provides the best moisture protection?

A

Tooled (Concave or V Joint)

102
Q

When laying brick, the leads are:

A

The corners

103
Q

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

A

60 - 120 lbs

104
Q

What is the best cleaning agent for brick?

A

Hydrochloric or muriatic acid

105
Q

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

A

A cavity wall

106
Q

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

A

2”

107
Q

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

A

6”

108
Q

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

A

Corrugated metal ties

109
Q

Blocks are positioned in a wall:

A

Wide flange up

110
Q

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

A

Curtain walls

111
Q

The maximum height of grout lifts is usually:

A

5’

112
Q

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

A

12”

113
Q

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

A

5/8”

114
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

115
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

116
Q

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

A

SW

117
Q

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

A

75%

118
Q

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

A

FTX unglazed

119
Q

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

A

40 lbs

120
Q

A standard glass block mortar joint is how thick?

A

1/4”

121
Q

What is mortar mainly composed of?

A

Portland cement

122
Q

What is the primary aggregate used in mortar?

A

Sand

123
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

124
Q

Masonry walls that intersect may be connected by what means?

A

Strap anchor

125
Q

When sandblasting, what size nozzle should be used?

A

1/4”

126
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

127
Q

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

A

1/16”

128
Q

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

A

Spread and furrow a full mortar bed

129
Q

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

A

Four or five

130
Q

A masonry veneer will not:

A

Support loads

131
Q

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

A

Lintel

132
Q

How thick are terrazzo toppings typically?

A

1/2”

133
Q

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

A

Isolated

134
Q

Which brick pattern is considered the weakest bond?

A

Stacked bond

135
Q

What type of CMU is commonly used with reinforcement?

A

Two-core

136
Q

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

A

One cubic yard

137
Q

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

A

Control joint

138
Q

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

A

Two

139
Q

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

A

Tuck Pointing

TONY: NC Contractor Exam (13 decks)

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