Module 5 Review

Of the five types of portland cement, the types that are generally only used for mortar are _____.

• Types I, III, and V

• Types I, II, and III

• Types II and IV

• Types III, IV, and V

Masonry cement is available in grades _____.

• M, S, N, O, and K

• I, II, III, IV, and V

• M, S, N, and O

• A, O, W, and R

The ASTM standard that applies to preblended mortar is _____.

• C144

• C270

• C207

• C91

Additives introduced into mortar to change its appearance or properties are called _____.

• entrainments

• aerations

• preblends

• admixtures

The type of mortar that is often interchanged with Type M because of its compressive strength is _____.

• Type K

• Type O

• Type S

• Type M

The term used to describe how well the mortar sticks to the masonry units is _____.

• adhesion

• admixture

• cohesion

• retention

The ability of mortar to withstand crumbling under pressure is called _____.

• durability

• mechanical bond

• cohesion

• compressive strength

In order for efflorescence to occur, two things must be present in a wall: _____.

• air-entrained mortar and rebar

• low-slump mortar and acidic soil

• soluble salts and moisture

• acidic soil and air-entrained mortar

During periods of warm and dry weather, sand does not need to be protected from _____.

• wind

• contact with other mortar ingredients

• moisture

• sunlight

When discharging mortar from a mixer, grasp the drum handle and dump the mortar into a wheelbarrow _____.

• after removing the blades

• after adding water to top off the mixture

• after the drum has stopped turning

• while the drum is still turning