The term CMU is generally used as an acronym for correct answers Concrete Masonry Unit
The cementitious material(s) in contemporaty masonry mortat consist(s) of correct answers Portland cement and lime
Which of the following materials increases the mortar's cohesiveness? correct answers Lime
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CNST 251 Final Exam || Already Graded A+.
The term CMU is generally used as an acronym for correct answers Concrete Masonry Unit
The cementitious material(s) in contemporaty masonry mortat consist(s) of correct answers
Portland cement and lime
Which of the following materials increases the mortar's cohesiveness? correct answers Lime
Which of the following materials increases the mortar's compressive strength? correct answers
Portland cement
Which of the following materials increases the mortar's workability? correct answers Lime
A wall made of Portland cement mortar (without lime) is more watertight than a wall made of
Portland cement and lime mortar correct answers False
The flexural tensile bond strength of a masonry wall is relevant in correct answers an
unreinforced masonry wall subjected to lateral loads
The flexural tensile bond strength of a masonry wall is a function of correct answers a. the
compressive strength of mortar
b. the type of masonry units
c. the quality of workmanship
d. the curing of mortar
For a masonry wall, the compressive strength of mortar should be as high as economically
feasible. correct answers False
Masonry mortar types are classified as correct answers Types M, S, N, and O
The mortar with the highest compressive strength is correct answers Type M
The mortar most commonly used in an exterior masonry veneer wall is correct answers Type N
The mortar commonly recommended for use in masonry walls in seismic regions is correct
answers Type S
Mortar may be specified either by proportion specification or by property specification. Which of
these two is more commonly used? correct answers Proportion specification
When mortar is specified using proportion specification, various solid materials that constitute
masonry mortar are proportioned based on their correct answers dry volumes
A preblended cementitious mix for masonry mortar is available as correct answers -masonry
cement
, -mortar cement
The most commonly used mortar joint thickness is correct answers 3/8 in
Which of the following mortar joint profiles should be specified for an exterior wall? correct
answers Concave joint
Bricks that have core holes are correct answers Extruded bricks
Bricks that have frogs are correct answers molded bricks
The primary reason for providing core holes in bricks is to correct answers provide uniform
drying and firing of bricks
The nominal dimension of a masonry unit whose actual dimension equals 7 5/8 inch is correct
answers none of the above (7 in, 7 1/4 in, 7 1/2 in, 7 3/4 in)
A masonry unit that has no voids (e.g., no core holes) is referred to as a correct answers 100%
solid unit
A masonry unit that has 20% voids (e.g., 20% core hole area) is referred to as a correct answers
solid unit
In specifying the dimensions of a masonry unit, which dimension is stated first? correct answers
Width, W, of the unit
In specifying the dimensions of a masonry unit, which dimension is stated last? correct answers
Length, L, of the unit
Per ASTM standards, facing bricks are classified as Types FBS, FBX, and FBA. Which of these
types has the most stringent requirements for dimensional tolerance, chippage, and warpage?
correct answers FBX
The freeze-thaw resistance of bricks has been found to be a function of the correct answers -
compressive strength of bricks
-boiling-water absorption of bricks
-saturation coefficient (SC) of bricks
The weathering index (WI) of a location is a function of the correct answers -average annual
freezing-cycle days
-average annual winter rainfall of the location
In a running-bond wall correct answers each course consists of stretchers
In an English-bond wall correct answers the courses alternate between headers and stretchers
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