Exam 1 Flashcards
The type of wallboard recommended for fire single layer
5/8 tapered edge
Water resistant (W/R) wall boards can be recognized by the color of its face paper, which is
Green or brown
The type of edge found on gypsum coreboard and backing board is:
T & G
(Tongue, and Groove)
Gypsum coreboard is used in drywall construction:
Ribs and Core
A general designation for fire rated gypsum board wall board and backing board is:
Type X
The Gypsum wallboard product best suited for use of the soffit side of eaves is:
Exterior gypsum ceiling board
“The soffit side of an eave” refers to the underside of the roof overhang
The tear-through resistance of dimpling effect of a nail for drywall application is determined by the:
Head design
Penetration of the nail into wood framing should not exceed:
7/8
The likelihood that shadowing or discoloration will occur in a nail on wallboard application is increased if the nail heads are:
Too large
Which of the following types of nail heads is not acceptable in drywall applications
Flat
Slightly concave
Slightly countersunk
Casing
Casing
Shrinkage of wood framing can result in loose boards and progressive withdrawals of nails in a drywall installation. This problem is directly related to.
Nail penetration
Screws are named according to their:
head shape
The gauge number of screws corresponds with the:
Screw diameter
All but one of the following are advantages of screws over nails in drywall application which one is not:
Few fasteners needed
Lower cost per fastener
Greater withdrawal resistance
No fracturing of core
Lower cost per fastener
Screws should be spaced how many inches center to center on wall boards that is applied to framing members 24 inches on centers
Ceilings 12
walls 12
The crown of a staple is termed narrow, medium, or wide, depending on the:
Gauge of staple wire
What length staple is best for fastening gypsum to gypsum ribs or 1 inch coreboard?
Inch and a half
Corner bead is used for
Outside corner angles
As a substitute for corner bead, the installer can use:
Metal tape
U metal is also called
Channel trim
Corner bead is made of
Galvanized steel
A corner bead machine fastens the bead by
Crimping
The space at the side of the installed corner bead is filled with
Joint compound
L metal and U metal trims can be installed, so as it forms a:
Moisture barrier
When colored trim is used as a batten to cover a joint and prefinished wall board, the heads of the attaching screws are concealed by:
Installing a vinyl strip over them
An important role in mixing casein-base compounds is that:
The dry mix must be added to the water
The substance used to complete a joint and conceal the fasteners are called
Topping compounds
An advantage of vinyl-based adhesives over casein base types is that they:
Will not sour
Powder-type compounds should at first be mixed:
With taping compound
During the first period when a casein-based compound is allowed to stand after the first mixing, it will tend to:
Discolor
Contact adhesive makes a good:
Pliable adhesive
A scaffold must be equipped with guard rails unless it is
Not over 7’ 6” high
An important rule for safe operation of electric tools is that the user should:
Make sure the tools are grounded
Electric shock is the result of:
Any contact with an electrical conductor.
Shock is caused by:
Not enough blood or obstruction
Breakdown of circulation
Infection or fear
The minimum safe width for drywall mechanics bench top is considered to be how many inches:
12
The first boards usually applied when installing drywall in a room are:
Ceiling panels
Compared to horizontal application, vertical application is considered:
Not as strong
Drywall butt joints should be
Staggered
In horizontal application of wall board panels long edges are:
At right angles to framing
Which one of the following statements about horizontal application is not true:
It is generally better than vertical application
It reduces the lineal footage of joint treatment
It bridges irregularities in framing
It results in somewhat more conspicuous joints
It results in somewhat more conspicuous joints
A rip is a wallboard cut that is:
Parallel to the paper edge
Joints in wall board should be
Loosely butted together
Nail pops are certain to occur if the wallboard is:
Loose
When a nailhead or screw head punctures the paper of a drywall panel, another fasteners should be driven about how far from the defective one:
2 inches
In horizontal application on walls:
The top panel is applied first
When a vertical joint is unavoidable in the region of an opening the joint should if possible be:
Centered over the opening
Which one of the following kinds of storage is not recommended for the Gypsum wall board?
Inside
Outside
Horizontal
Vertical
Outside
If possible, gypsum wall board should be delivered to and stored at the job site. How many days in advance of installation
One
Wall warping is often in the result of:
Improper stacking
The kind of damage most often encountered gypsum drywall is:
Breakage
Dunnage should be placed under stacked drywall
On all concrete floors
A kind of damage that often occurs to drywall as a consequence of uneven stacking is
Broken corners
Each stack of drywall should be placed as nearest as practicable to:
It’s final location
Wood shrinks most:
Across flat grain
When inspecting the framing to determine whether it is suitable to receive wall board, the drywall man must check the wood for moisture content, and for three of the four items listed below which one of the four is non-important to this regard:
Evidence of dry rot
Wood species used
Excessive number of knots
Slash Grain
Wood species used
Which one of the following words best describes the standards of quality prescribed by local building codes
Maximum
Minimum
Flexible
Optional
Minimum
Building codes are enforced by:
Building inspectors
A nailing hazard in radiant heating system is:
Copper pipe
A nailing hazard in electrical system is
Cable not in conduit
Who has a responsibility of checking to determine whether the job is ready for drywall:
The drywall contractor
Stubbs should ordinarily be driven into concrete no closer than what the distance from an edge or corner:
2 inches
Stove should ordinarily be driven into mid steel plates no closer than with the distance from an edge or corner:
1/2 inch
The ease of penetration of a nail is determined, mainly by the:
Point shape
Nails that have a long slender point tend to:
Follow the woodgrain
The surface treatment of nails intended for drywall application should be:
A rust resilient type
An improved drywall nail has been introduced that combines the desirable features of other nails used in the trade while overcoming their main disadvantages. The new nail has a:
Cupped head and etched shank
All but one of the following are good practices in applying gypsum wall board which one is not:
Cut wall board to fit accurately, but loosely
Press the board lightly against the framing when nailing
Use a hammer with a flat surface
After fastening check for loose nails by pounding on the board
Use a hammer with a flat surface
Nail penetration in Gypsum drywall application should not be more than:
7/8
Using a single nailing pattern, what field nailing spacing is used in a wall
8 inches
In the double nailing system what spacing is used between the first and second nails from the first nail is one pair to the first nail in the next pair
2 inches maximum
In the double nailing system, what spacing is used between pairs of field nails from the first nail in one pair to the first nail in the next pair?
12 inches
To reduce the chance of nail pops, wall board is always nailed:
From the center towards the edges
Nails that miss the framing should be:
Removed
Nail pops that appear after a house is completed and occupied should be repaired:
Near the end of the heating season
The two basic nailing patterns in general use for drywall installation are:
Single and double
The back blocking system is designed to minimize:
Ridging and beading
Beading will show up at joints:
After finishing
Ridging is more likely to occur when joints are finished during what kind of weather:
Cold and damp
Backblocks are applied with adhesive beads:
Perpendicular to joints
In a back blocked system, the button ends of wall board should be:
Loosely butted
The first panel applied to the ceiling should be parallel to the starting wall and:
Quarter inch from the plate
In general, it is preferable to install ceiling panels
At right angles to joists
In trust type construction
Non load-bearing interior walls are needed
To the drywall installer, the advantage of truss type construction is that wall board for the entire ceiling area can be applied:
Before the partitions are installed
When end joints are unavoidable in ceiling applications, the joints should be:
Beveled
If the ceiling is to receive wall board, the spacing of trusses of joints must not exceed how many inches on centers:
24
When a fastener has punctured the face paper
Another fastener should be driven nearby
When installing wall board around the rough opening of a door or window that is to receive wood jambs, how much tolerance should the mechanic allow in fitting the wall board to the edge of the trimmer?
Quarter inch to half inch back of the edge
Window returns and other narrow pieces of wall board should be applied:
Last
In addition to raising the nap of the paper over sanding after the third coat of joint compound can cause
Glazing
On outside corner where metal bead is applied. The joint compound should be feathered out at least:
10 inches
The minimum acceptable working temperature during the joint treatment operation is how many degrees Fahrenheit
55
Under the best drying conditions, the minimum drying time between coats of compound is:
16 hours
Blisters that cannot be laid down with the joint finishing knife should be:
Punch to let air out
Nailhead should be spotted at least how many times:
Three
The edges of the second coat should be feathered out how far beyond the edges of the first coat
One to 2 inches
Prefinished panels are usually applied:
Vertically
Prefinished panels are usually fastened with interior finish design…
Adhesive
Nails along the end and edges of a panel should be placed at least how far apart from the head or edge:
3/8
Nails along the end and edges of a panel should be placed at least how far apart from the head or edge:
3/8
