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Contractors test > 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 acid
Hydrochloric 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

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

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

32
Q

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

A

True

33
Q

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

A

2 feet

34
Q

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

A

6 inches

35
Q

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

A

1 ½ times the bar diameter

36
Q

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

A

Cement

37
Q

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

A

Type II

38
Q

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

A

3/8 inch

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

3:1

40
Q

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

A

Basket weave

41
Q

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

A

3 cubic feet

42
Q

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

A

Concave

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

44
Q

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

A

5

45
Q

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

A

Jewel

46
Q

What best describes “tuckpointing”?

A

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

47
Q

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

A

16 inches – 2 courses

48
Q

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

A

Type I

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

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

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

52
Q

When referring to masonry, what best describes a Wythe?

A

A continuous vertical section of masonry one unit in thickness
Remember 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

53
Q

What is masonry mortar made up of?

A

Cement, hydrated lime, sand and water

54
Q

Corrugated masonry anchors shall have a minimum thickness of:

A

22 gauge

55
Q

What is the minimum size of a masonry weep hole?

A

3/16 inch

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

Contractors test (13 decks)

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