5-9.
What is the main purpose of the
3/4-inch holes in perforated gypsum
lath?
1.
To allow for easy installation
2.
To allow for expansion of the
mortar
3.
To provide ventilation for
interior walls
4.
To provide a mechanical key for
the mortar
5-10.
What type of lath is considered the
most versatile?
1.
Metal
2.
Gypsum
3.
Wood
4.
Insulation
5-11.
What length of blued gypsum lath
nail is recommended for installing
1/2-inch gypsum lath?
1.
1
in.
2.
1 1/8 in.
3.
1 3/16 in.
4.
1 1/4 in.
5-12.
What is the minimum end lap for
wire lath?
1.
1
in.
2.
2
in.
3.
3
in.
4.
2 1/2 in.
5-13.
What is the purpose of a casing
bead?
1.
To reinforce the lath and
inside corners
2.
To reinforce the door and
window casings
3.
To provide room for expansion
between plaster edges and the
edges of baseboards
4.
To provide a finished edge
around openings
5-14.
To minimize shrinking and cracking
around the upper corners of doors
and windows, you should install
which of the following items?
1.
Plaster grounds
2.
Expanded metal lath strips
3.
Base screeds
4.
Casings beads
5-15.
Which of the following components
serve as temporary guides around
window and door openings and are
removed after the plaster has set?
1.
Cornerites
2.
Corner beads
3.
Plaster grounds
4.
Lath strips
5-16.
What is the recommended type and
proportions for two-coat plaster
used on a masonry or concrete base?
1.
Gypsum plaster 1:2.5
2.
Lime plaster using lime putty
1:3.5
3.
Portland cement 1:5
4.
Lime plaster using hydrate lime
1:7.5
5-17.
You should not apply a lime finish
to which of the following base
coats?
1.
Gypsum
2.
Portland cement
3.
Gypsum-vermiculite
4.
Lime
5-18.
When mortar materials are mixed by
hand, what is the maximum time that
mixing should continue after all
the materials have been blended?
1.
5 min
2.
10 min
3.
15 min
4.
20 min
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