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Masonry Level 1 - Module 5- Questions and Answers
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Masonry Level 1 - Module 5- Questions and Answers
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Masonry Level 1 - Module 5- Questionsand Answers
The amount of air contained in the mortar mix is determined by ________________. Correct
Ans-The range of sand particle sizes and grades
An admixture that adds workability to mortar is called a(n) ______________. Correct Ans-
Plasticizer
Mortar that is sometimes used for reconstruction of historic buildings is ____________.
Correct Ans-Type K
For the majority of masonry construction, the most important property of mortar is
_______________. Correct Ans-Extended of bond
The compressive strength of mortar and concrete are ______________. Correct Ans-The
cement content increases
The water-cement ratios for mortar and concrete are _______________. Correct Ans-Very
different
A mortar joint made with properly proportioned mortar will ___________. Correct Ans-
Shrink
The major cause of improper proportioning of materials when mixing mortar is
__________________. Correct Ans-Poor work techniques
, In cold weather, consider heating water for mortar mixing when the air temperature is below
_______________. Correct Ans-40^F
Tempering mortar is permitted only ______________. Correct Ans-To replace moisture lost
trough evaporation
Efflorescence on a masonry surface appears _______________. Correct Ans-Soon after the
wall is built
Sand for use in mortar is usually stored _________________. Correct Ans-In a loose pile on
the ground
A mixing specification for mortar of 1:1:6 indicates _______________. Correct Ans-1 part
portland cement, 1 part lime, 6 parts sand
The amount of material in a 94-pound bag of porland cement is _________________.
Correct Ans-1 cubic foot
To prevent mortar from cracking on the mixing paddles, ___________________. Correct
Ans-Wet the drum with small amount of water before you add dry material
Lime reduced by mixing with water to a safe form form that can be used in the production of
mortar. Correct Ans-Slaked lime
Adhesion of mortar to masonry units as determined by its lime and moisture content.
Correct Ans-Extent of bond
The ability of mortar to keep sufficient water in the mix to enhance plasticity and workability
and to decrease the need to temper. Correct Ans-Water retention
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