CSLB CONTRACTOR B EXAM PLASTER (STUCCO)
EXAM ACTUAL QUESTIONS AND ANSWERS 2025-2026
A+ GRADE.
inside or outside - CORRECT ANSWER -
Portland cement plaster is a versatile facing material that can be applied to any flat or curved surface eith
er or of any structure or building
they're the same - CORRECT ANSWER -
what is the difference between Portland cement plaster and Portland cement stucco
scratch, brown and finish - CORRECT ANSWER -
3 coats in typical plaster install over metal reinforcement with or without solid backing.
2 coat - CORRECT ANSWER -
work may be used over solid masonry or concretes surfaces that are reasonably true planes a
nd provide adequate bond
single coat - CORRECT ANSWER -
Some backgrounds, such as smooth concrete, have level surfaces and uniform suction that make thin,
plastering possible
add pigments while preparing the mixture - CORRECT ANSWER -how do you give the stucco coloer
hard, strong, fire resistant, color retentive and durable to weather conditions - CORRECT ANSWER -
name 5 characteristics of plaster in its hard state
portland cement and gypsum - CORRECT ANSWER -
Two of the main materials used to make up plaster are and
accelerator - CORRECT ANSWER -
An admixture that speeds the rate of hydration of hydraulic cement, shortens the normal time of setting
or increases the rate of hardening, or strength development, or both, of cement plaster
, Addition (improperly called additive) - CORRECT ANSWER -A substance that is inter-
ground or blended in limited amounts into a hydraulic cement during manufacture - not at the jobsite —
either as a processing addition to aid in manufacturing and handling the cement or as a functional additi
on to modify the use properties of the cement
admixture - CORRECT ANSWER -
A material, other than water, aggregates, and hydraulic cement, used as an ingredient of plaster and add
ed to the batch immediately before or during mixing.
Air-entraining hydraulic cement - CORRECT ANSWER -Hydraulic cement containing an air-
entrainingYaddition in an amount that cause the cement to entrain air in plaster within specified limits
base coat - CORRECT ANSWER -
The total of all plaster coats applied prior to application of finish coat. Where more than two layers of pla
ster are applied, the first application is called the scratch coat and the second coat is called the brown-
coat. The combined first and second coats are called the
binders - CORRECT ANSWER -
Cementing materials, either hydrated cements or products of cement or lime and reactive siliceous mate
rials; the cement type and curing conditions govern the formed
bond - CORRECT ANSWER -
Adhesion of plaster to other surfaces against which it is applied; adhesion of cement paste to aggregate,
adherence between plaster coats or between plaster and substrate.
building paper - CORRECT ANSWER -
Vegetable Fiber (Kraft, waterproofed, water repellent, and fire resistant), for some building occupancies,
such as hospitals, must be flameproof and must comply with ASTM D777. Asphalt-
saturated building felt should weigh not less than 14-lbs. per 108-
square feet. should be free from holes and breaks.
chemical bond - CORRECT ANSWER -
Adhesion between dissimilar materials or between one plaster coat and another that is the result of
a chemical reaction.
EXAM ACTUAL QUESTIONS AND ANSWERS 2025-2026
A+ GRADE.
inside or outside - CORRECT ANSWER -
Portland cement plaster is a versatile facing material that can be applied to any flat or curved surface eith
er or of any structure or building
they're the same - CORRECT ANSWER -
what is the difference between Portland cement plaster and Portland cement stucco
scratch, brown and finish - CORRECT ANSWER -
3 coats in typical plaster install over metal reinforcement with or without solid backing.
2 coat - CORRECT ANSWER -
work may be used over solid masonry or concretes surfaces that are reasonably true planes a
nd provide adequate bond
single coat - CORRECT ANSWER -
Some backgrounds, such as smooth concrete, have level surfaces and uniform suction that make thin,
plastering possible
add pigments while preparing the mixture - CORRECT ANSWER -how do you give the stucco coloer
hard, strong, fire resistant, color retentive and durable to weather conditions - CORRECT ANSWER -
name 5 characteristics of plaster in its hard state
portland cement and gypsum - CORRECT ANSWER -
Two of the main materials used to make up plaster are and
accelerator - CORRECT ANSWER -
An admixture that speeds the rate of hydration of hydraulic cement, shortens the normal time of setting
or increases the rate of hardening, or strength development, or both, of cement plaster
, Addition (improperly called additive) - CORRECT ANSWER -A substance that is inter-
ground or blended in limited amounts into a hydraulic cement during manufacture - not at the jobsite —
either as a processing addition to aid in manufacturing and handling the cement or as a functional additi
on to modify the use properties of the cement
admixture - CORRECT ANSWER -
A material, other than water, aggregates, and hydraulic cement, used as an ingredient of plaster and add
ed to the batch immediately before or during mixing.
Air-entraining hydraulic cement - CORRECT ANSWER -Hydraulic cement containing an air-
entrainingYaddition in an amount that cause the cement to entrain air in plaster within specified limits
base coat - CORRECT ANSWER -
The total of all plaster coats applied prior to application of finish coat. Where more than two layers of pla
ster are applied, the first application is called the scratch coat and the second coat is called the brown-
coat. The combined first and second coats are called the
binders - CORRECT ANSWER -
Cementing materials, either hydrated cements or products of cement or lime and reactive siliceous mate
rials; the cement type and curing conditions govern the formed
bond - CORRECT ANSWER -
Adhesion of plaster to other surfaces against which it is applied; adhesion of cement paste to aggregate,
adherence between plaster coats or between plaster and substrate.
building paper - CORRECT ANSWER -
Vegetable Fiber (Kraft, waterproofed, water repellent, and fire resistant), for some building occupancies,
such as hospitals, must be flameproof and must comply with ASTM D777. Asphalt-
saturated building felt should weigh not less than 14-lbs. per 108-
square feet. should be free from holes and breaks.
chemical bond - CORRECT ANSWER -
Adhesion between dissimilar materials or between one plaster coat and another that is the result of
a chemical reaction.
