COSC 253 EXAM 2 QUESTIONS AND ANSWERS
Which division is Masonry? - CORRECT ANSWER✅✅Division 4
Mortar - CORRECT ANSWER✅✅binding agent between masonry units.
Four main ingredients in mortar: - CORRECT ANSWER✅✅Portland Cement or Masonry Cement-
bonding agent in the mortar.
Hydrated Lime- makes the mortar smooth and workable.
Aggregate (Sand)- must be clean and sized properly.
Water- binds ingredients in the mortar.
What is grout? - CORRECT ANSWER✅✅Grout is a filler. It is not considered a binding agent.
What do most architects require before the entire wall is constructed on a building? - CORRECT
ANSWER✅✅A mock up
ASTM C270: Type M - CORRECT ANSWER✅✅High strength mortar-structural walls; severe weather
exposure, below grade.
ASTM C270: Type S - CORRECT ANSWER✅✅Medium strength mortar- structural walls; severe weather
exposure.
ASTM C270: Type N - CORRECT ANSWER✅✅Medium strength mortar- used for most purposes, above
grade.
ASTM C270: Type O - CORRECT ANSWER✅✅Medium or low strength- most economical; non-
loadbearing interior walls.
Portland cement- Lime mortar ingredients: - CORRECT ANSWER✅✅Portland Cement- bonding agent in
the mortar.
, Lime- makes the mortar smooth and workable.
Aggregate (Sand)- must be clean and sized properly.
Water- binds ingredients in the mortar.
Masonry cement mortar ingredients: - CORRECT ANSWER✅✅Masonry Cement- bonding agent in the
mortar.
Hydrated Lime- makes the mortar smooth and workable.
Aggregate (Sand)- must be clean and sized properly.
Water- binds ingredients in the mortar.
What is Tuck pointing? - CORRECT ANSWER✅✅The refilling of an existing joint from which some of the
mortar has been removed.
What is flashing? - CORRECT ANSWER✅✅A membrane that you add to protect a joint, typically from
water.
Flashing material: - CORRECT ANSWER✅✅Sheet metal, bituminous fabric membranes, plastic sheet
materials, or a combination of these materials.
Where is flashing installed? - CORRECT ANSWER✅✅Flashing is installed at vulnerable locations in
masonry; thresholds of doors, 90 degree angles...
What are weep holes? - CORRECT ANSWER✅✅Holes to let condensation out of the wall.
What are the 3 classifications of Clay Masonry Units? - CORRECT ANSWER✅✅Solid Masonry Units
Hollow Masonry Units
Architectural Terra Cotta
Clay Masonry Units Properties: - CORRECT ANSWER✅✅Durability
Compressive Strength
Which division is Masonry? - CORRECT ANSWER✅✅Division 4
Mortar - CORRECT ANSWER✅✅binding agent between masonry units.
Four main ingredients in mortar: - CORRECT ANSWER✅✅Portland Cement or Masonry Cement-
bonding agent in the mortar.
Hydrated Lime- makes the mortar smooth and workable.
Aggregate (Sand)- must be clean and sized properly.
Water- binds ingredients in the mortar.
What is grout? - CORRECT ANSWER✅✅Grout is a filler. It is not considered a binding agent.
What do most architects require before the entire wall is constructed on a building? - CORRECT
ANSWER✅✅A mock up
ASTM C270: Type M - CORRECT ANSWER✅✅High strength mortar-structural walls; severe weather
exposure, below grade.
ASTM C270: Type S - CORRECT ANSWER✅✅Medium strength mortar- structural walls; severe weather
exposure.
ASTM C270: Type N - CORRECT ANSWER✅✅Medium strength mortar- used for most purposes, above
grade.
ASTM C270: Type O - CORRECT ANSWER✅✅Medium or low strength- most economical; non-
loadbearing interior walls.
Portland cement- Lime mortar ingredients: - CORRECT ANSWER✅✅Portland Cement- bonding agent in
the mortar.
, Lime- makes the mortar smooth and workable.
Aggregate (Sand)- must be clean and sized properly.
Water- binds ingredients in the mortar.
Masonry cement mortar ingredients: - CORRECT ANSWER✅✅Masonry Cement- bonding agent in the
mortar.
Hydrated Lime- makes the mortar smooth and workable.
Aggregate (Sand)- must be clean and sized properly.
Water- binds ingredients in the mortar.
What is Tuck pointing? - CORRECT ANSWER✅✅The refilling of an existing joint from which some of the
mortar has been removed.
What is flashing? - CORRECT ANSWER✅✅A membrane that you add to protect a joint, typically from
water.
Flashing material: - CORRECT ANSWER✅✅Sheet metal, bituminous fabric membranes, plastic sheet
materials, or a combination of these materials.
Where is flashing installed? - CORRECT ANSWER✅✅Flashing is installed at vulnerable locations in
masonry; thresholds of doors, 90 degree angles...
What are weep holes? - CORRECT ANSWER✅✅Holes to let condensation out of the wall.
What are the 3 classifications of Clay Masonry Units? - CORRECT ANSWER✅✅Solid Masonry Units
Hollow Masonry Units
Architectural Terra Cotta
Clay Masonry Units Properties: - CORRECT ANSWER✅✅Durability
Compressive Strength
