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Flashcards in Masonry Deck (72):
1

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

MW brick (moderate weathering)

2

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

5/8 inch

3

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

Type S

4

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

8, 9, 10, or 11

5

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

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

6

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

Brick hammer

7

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

Concave

8

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

Bonding strength

9

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

2 inch

10

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

Tuck-pointing

11

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

Stack bond

12

Which of the below brick bonds would be the weakest?

Stack bond

13

The wide flange of block is located where:

Top

14

A masonry block weighs:

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

15

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

1/16 inch

16

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

90 min

17

When should concrete masonry units be wetted down?

Never

18

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

Common

19

The nominal size of an 8 inch stretcher block is?

8 x 8 x 16

20

Which of the following is not a masonry mortar type?

P

21

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

Quantum – quantities or amounts

22

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

5/8 inch

23

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

One full wire grid spacing plus 2 inches

24

Which masonry joint finish generally provides the best moisture protection?

Tooled

25

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

6 inches

26

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

True

27

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

English

28

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

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

29

What material is best used for exterior window sills?

Limestone

30

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

True

31

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.

3/4 inch

32

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

True

33

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

2 feet

34

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

6 inches

35

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

1 ½ times the bar diameter

36

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

Cement

37

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

Type II

38

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

3/8 inch

39

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

3:1

40

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

Basket weave

41

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

3 cubic feet

42

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

Concave

43

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

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

44

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

5

45

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

Jewel

46

What best describes “tuckpointing”?

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

47

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

16 inches – 2 courses

48

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

Type I

49

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?

– Flemish bond with header

50

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

Mortar that has not started to set up yet

51

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

6 inches

52

When referring to masonry, what best describes a Wythe?

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

What is masonry mortar made up of?

Cement, hydrated lime, sand and water

54

Corrugated masonry anchors shall have a minimum thickness of:

22 gauge

55

What is the minimum size of a masonry weep hole?

3/16 inch

56

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

40 pounds

57

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

True

58

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

75 %

59

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

2500 psi

60

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

Type M

61

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

Mortar loses workability due to hydration

62

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

Running bond

63

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

12 feet

64

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

1800

65

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

Lintels

66

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

2

67

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

Carry’s own weight

68

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

Bonding strength

69

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

3/8 inch

70

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

60 to 120 psi

71

71 – What is true about a masonry veneer wall?

Building frame structure is erected first

72

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

2 core