Drywall and Plaster

Question 1

What penetration are face layer sheetrock fastners, GWB-54, required by code to provide?

Answer 1

3/4”

Question 2

what causes cracking or wrinkling at taped edges of drywall?

Answer 2

Very rapid drying

Question 3

where should the first nails be spaced in the double nailing method for attaching sheetrock board to wood framing

Answer 3

12” OC along the supports in the field of the shootrock

Question 4

what type of lath is used as the plaster base, when plastering ceilings in garages?

Answer 4

metal

Question 5

three coat work requires

Answer 5

a finish coat
a brown coat
a scrath

Question 6

for what period of time must the scratch coat be cured?

Answer 6

not less than 48 hours

Question 7

how is chicken wire ordered

Answer 7

by the roll

Question 8

the lath used for a plaster finish is

Answer 8

metal
gypsum
insulating fiberboard

Question 9

which of the following has the greatest insulating value

Answer 9

insulating fiberboard

Question 10

stucco adheres best to which of the following

Answer 10

wire lath

Question 11

over which types of bases may portland cement plaster be applied

Answer 11

wire
masonry

Question 12

gypsum is what type of lath

Answer 12

mineral lath

Question 13

gypsum mortar sets

Answer 13

faster than lime mortar

Question 14

metal lath is usually applied with the long dimension of the sheet in a

Answer 14

horizonatl direction

Question 15

what is the principle binder in gypsum products

Answer 15

lime

Question 16

metal lath is ordered by the bundle. How many peices are in a bundle

Answer 16

12

Question 17

what is an advantage of plaster acoustical ceilings over other acoustical ceilings?

Answer 17

its fire resistance

Question 18

which are teh best nails for drywall

Answer 18

annular ring

Question 19

how many pounds of nails should be ordered if you need 2500 for a job plus a 10% allowance, if the nails come 150 to the pound

Answer 19

19

Question 20

the nails should be placed no more than how far on center, when installing drywall on a ceiling

Answer 20

7”

Question 21

the nails should be placed no more than how far on center, when installing drywall on sidewalls

Answer 21

8”

Question 22

what does the term drywall most usually refer to

Answer 22

gypsum wall board

Question 23

ridging refers to

Answer 23

conspicouls wrinkling of joint tape and treated joints

Question 24

usually drywall shuld first be installed

Answer 24

on the ceilings

Question 25

what is the recommended head diameter for drywall nails

Answer 25

19/64"

Question 26

which of the following statements is false

Answer 26

in perpendicular installation, the short side of the drywall is attached perpendicular to the studs

Question 27

Which of the followign is the best hammer for drywall

Answer 27

concave

Question 28

how do you get a clean cut on drywall

Answer 28

first score the front

Question 29

what is the most important advantage of installing drywall with screws

Answer 29

it holds more securely

Question 30

the panels should be applied within how many minutes of the application of the adhesive nail on application

Answer 30

15

Question 31

what are the two basic nailing patterns in general use for drywall

Answer 31

single and double

Question 32

what is the basic cause of nail pops

Answer 32

wood shrinkage

Question 33

before the first coat of drywall compound is applied, the entire installation must be checked for

Answer 33

defective joints loose boards poorly driven nails

Question 34

what will a skim coat of tape compound help prevent happening to drywall taped edges

Answer 34

cracking

Question 35

joints in wallboard should be

Answer 35

loosely butted together

Question 36

what are the 3 stucco coats

Answer 36

scratch brown finish

Question 37

the term portalnd cement plaster applies to

Answer 37

stucco

Question 38

stucco work is estimated by what unit of measure

Answer 38

square yard

Question 39

when ceramic tile more than 3/8 inch thick is applied over water resistant gypsum board, fasten the board with screws or nails spaced not more than

Answer 39

4 inches oc

Question 40

slightly crooked ceiling joists are sometimes straightened by the use of a

Answer 40

strong back

Question 41

When the wall is greater than ____ gypsum board is installed vertically

Answer 41

8'1"

Question 42

what are the most popular standard gypsum board lenths

Answer 42

8,10,12 and 16 feet

Question 43

when fastening drywall, minimum penetration of ring shanked nails into the framing member is

Answer 43

3/4 inch

Question 44

when applying the paper covered edge of water resistant gypsum board, it should be not less than ____ inch above the lip of the tub or shower pan

Answer 44

1/4

Question 45

joints in the face layer of a multilayer application are offset from joints in the base layer by at least

Answer 45

10 inches

Question 46

what is the width of standard gypsum board

Answer 46

48 inches

Question 47

nails are spaced a maximum of ____ in the single nailing method

Answer 47

8 inches OC on walls, 7 inches OC on ceiling

Question 48

screws are spaced

Answer 48

16 inch OC on walls, 12 inches OC on ceilings

Question 49

how many inches should weep screed be placed above the earth

Answer 49

6

Question 50

wood supports for drywall shall not be less than ____ inches nominal in the least dimension

Answer 50

2

Question 51

how many days should there be between scratch and brown coat, when applying partland cement plaster

Answer 51

2

Question 52

how many inches oc should the maximum spacing of supports for NO17 gauge woven wire fabric lath on vertical hollow metal studs

Answer 52

16

Question 53

when installing a suspended ceiling you should first

Answer 53

make a drawing of the ceiling

Question 54

when locating joists above an existing ceiling, you should

Answer 54

use a hammer to tap on the ceiling until you hear a dull thud

Question 55

if you have a wall with studs spaced 16 inches on center with a 1/2 inch thick drywall installed parallel to the studs, the nailing should be ____ nails spaced 2 to 2-1/2 inches apart with pairs spaced 12 inches apart except at the perimeter of the sheet

Answer 55

2

Question 56

interior metal lath shall be lapped not less than ____ inches at the sides and 1 inch at the ends

Answer 56

1/2

Question 57

metal stud or wood frame construction with a slab on grade floor shall have exterior plaster applied so that it does not extend below the

Answer 57

lath and paper

Question 58

hangers supporting a 16 sq ft area of a suspended ceiling that weighs 5 pounds per sq ft shall be No. ____ guage wire

Answer 58

8

Question 59

staples used to fasten the base ply of a two ply drywall installation shall be

Answer 59

No 16 guage

Question 60

which of the following measurements should be used when squaring a room

Answer 60

3,4 and 5 feet

Question 61

how many inches thick should the finish coat of interior plaster be

Answer 61

1/16

Question 62

suspension wire is used to hand____ in suspended ceiling

Answer 62

main runners

Question 63

what are the most common sizes in inches of ceiling tile

Answer 63

12x12 and 12x24

Question 64

when fastening 12" x 12" tiles you must use

Answer 64

4 staples

Question 65

the minimum length of a screw used to fasten the face layer of a double 5/8 inch thick drywall assembly on wood framing shall not be less than ____ inches long

Answer 65

1-7/8

Question 66

Screws used for attaching 3/8 inch metal rib lath shall penetrate wood framing not less than

Answer 66

5/8

Question 67

nails used for fastening furring to ceiling joists must penetrate into the joists at least

Answer 67

1 inch

Question 68

gypsum wall board shall not be installed

Answer 68

without weather protection

Question 69

what is the width in inches of border tiles for a room measuring 14'9" x 22'-3"

Answer 69

10-1/2 and 7-1/2

Question 70

what is the width in inches of 24" x 24" border tiles for a room measuring 12'6" x 18'8"

Answer 70

15 and 16

Question 71

Rebound material from gunite may be reused as sand in an amount not greater than what percent of the total sand in an batch

Answer 71

25

Question 72

how many inches thick should gypsum plaster be when measuring from the back plane of expanded metal lath

Answer 72

7/8

Question 73

how many inches OC should the face layer be nailed when two layers of 5/8 inch thick gypsum wallboard are attached parallel to joist spaced 24 inches OC

Answer 73

This is not allowed

Question 74

how many inches in nominal thickness in the least dimension should suspended wood systems be, with the exception of furring strips not less than 1 inch that may be used over solid backing

Answer 74

2

Question 75

how many days should there be between the second and finish coat, when applying exterior portland cement plaster

Answer 75

7

Question 76

what is the minimum inches that the overall thickness of exposed aggregate plaster should be

Answer 76

7/8

Question 77

when attaching 1/2 inch thick gypsum board to wood framing in single layer installations, how many inches should long screws be

Answer 77

1-1/8