Exam 1 Flashcards by Victor Mendez

The type of wallboard recommended for fire single layer

5/8 tapered edge

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Water resistant (W/R) wall boards can be recognized by the color of its face paper, which is

Green or brown

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The type of edge found on gypsum coreboard and backing board is:

T & G
(Tongue, and Groove)

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Gypsum coreboard is used in drywall construction:

Ribs and Core

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A general designation for fire rated gypsum board wall board and backing board is:

Type X

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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

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The tear-through resistance of dimpling effect of a nail for drywall application is determined by the:

Head design

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Penetration of the nail into wood framing should not exceed:

7/8

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The likelihood that shadowing or discoloration will occur in a nail on wallboard application is increased if the nail heads are:

Too large

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Which of the following types of nail heads is not acceptable in drywall applications

Flat

Slightly concave

Slightly countersunk

Casing

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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

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Screws are named according to their:

head shape

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The gauge number of screws corresponds with the:

Screw diameter

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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

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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

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The crown of a staple is termed narrow, medium, or wide, depending on the:

Gauge of staple wire

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What length staple is best for fastening gypsum to gypsum ribs or 1 inch coreboard?

Inch and a half

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Corner bead is used for

Outside corner angles

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As a substitute for corner bead, the installer can use:

Metal tape

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U metal is also called

Channel trim

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Corner bead is made of

Galvanized steel

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A corner bead machine fastens the bead by

Crimping

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The space at the side of the installed corner bead is filled with

Joint compound

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L metal and U metal trims can be installed, so as it forms a:

Moisture barrier

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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:

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:

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

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

Exam 1 Flashcards

(101 cards)