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CSM 125 Exam 2 Questions and Answers Fully Solved
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Exam of 14 pages for the course Certified Scrum Master at Certified Scrum Master (CSM 125 Exam 2)
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CSM 125 Exam 2What Division Number is Masonry in the CSI Master Format? - answer Division 04 -
"Masonry"
What is cement? - answer A binding element or agent used as a substance to make
objects adhere to each other
What is mortar? - answerMortar is a mixture of cement, sand, water, and lime used to
bond together precast masonry units
What is concrete? - answerA composite material that includes cement, a mix of sand
and gravel and water and is used for structural applications
What is the function of mortar? - answerTo join bricks and stonework together
What are the ingredients in mortar? - answerPortland Cement, aggregate, hydrated
lime, water
What is aggregate? - answerMixture of natural/ manufactured sand & gravel
What is quicklime? - answercalcium oxide (limestone and other minerals are finely
ground and heated to make CaO)
What is hydrated lime? - answerWater is added to quicklime to "slake" (chemically
convert the oxides to hydroxides)
Dry powder
What are the two most common types of mortar? - answerType-M (high strength,
freeze-thaw)
Type-S (stronger than N, high structural strength, load bearing walls/foundation)
What does lime do when added to mortar mix? - answerImprove workability
Increase water retention
Reduce shrinkage and cracking
Self healing properties
Flexibility/elasticity
Enhanced bond strength
How are bricks produced? - answerMining and prep of raw materials
Grounded up
, Screened to control particle size
Add water
Mold into bricks
Soft mud process (molded) - answerThe process of forming brick by molding relatively
wet clay
Dry press process (molded) - answerThe process of forming brick by molding relatively
dry clay under high pressure, resulting in sharp-edged, smooth-surfaced bricks.
Use steel molds
Stiff mud process (extruded) - answerModerate moist clay is extrudes through dies and
then sliced into individual units
Least expensive forming method
90% of bricks in US
For a plain modular brick, what are the nominal dimensions? - answerW - 4in
H - 2 2/3in
L - 8 in
4 x 2-2/3 x 8 in
Standard nominal size of a CMU? - answer8x8x16 in
running bond - answerBricks are staggered by 1/2 brick
It's exactly how you would draw bricks in your head
How would you span a horizontal opening in a brick wall? - answerUse lintels ( steel
angle, stone, precast concrete, reinforced
Arches
Corbelling
What is efflorescence? - answerA white crystalline deposit of water-soluble salts on the
surface of brick masonry
What does a kiln do with regards to brick production? - answerDrying excess moisture
from bricks
Firing (heated to 2000 F to cause vitrification (minerals fuse together), water removal,
coloration)
Cooling
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