Class B Flashcards
The maximum weather exposure for 18” wood shingle is
a) 3-4”
b) 4-6”
c) 7-10”
d) 10-12”
4-6 inches
What about other sizes and exposures?
An ammeter is used in _______ with a ______ circuit
a) series, energized
b) series, unenergized
c) parallel, energized
d) parallel, unenergized
series, energized
ammeter - series circuit
ohmmeter - parallel circuit
series circuit, the total voltage is divided equally.
How closely must support be spaced for Romex in a roof cavity?
a) 4ft
b) 6ft
c) 12ft
d) 16ft
4ft
what about other areas?
GFCI are usd for
a) a series circuit
b) a parallel circuit
c) a wet area
d) all of the above
all of the above
series circuit - components are connected in a line from end to end. voltage is divided equally between each component
parallel - each component branches to it’s own, voltage same across all components
If you run into roots while digging a footing what should you do?
a) continue excavating according to plan
b) cut out the roots, then continue
c) clear roots 12” down and away from footing
d) clear roots from the entire lot
clear roots 12” down and away from footing
The most important consideration in preparing a building site is the
a) property line
b) drainage
c) landscaping
d) elevation
drainage
Approximately how many 4”x4” tiles would you need to tile a 30”x60” show pan and three walls 5ft tall. Use 1/4” grout lines, assuming no curb and allow 15% for waste.
a) 439
b) 574
c) 720
d) 800
574
9000 / (4.25x4.25) * 1.15
How is expansive soil treated?
a) moisture treatment
b) sand treatment
c) line treatment
d) any of the above
any of the above
Expansive soil is soil that expands with water is added and shrinks when dry
Which of the following need not be grounded?
a) receptacle
b) junction box
c) light fixture
d) thermostat
thermostat
What is the weather exposure for 3-ply #15 roofing?
a) 8 1/2”
b) 9 3/4”
c) 11 1/2”
d) 14 1/2”
11 1/2”
The function of a waler is
a) to support a deck
b) horizontal member used to align and brace concrete forms or piles
c) to catalyze a chemical reaction
d) to decrease a chemical reaction
horizontal member used to align and brace concrete forms or piles
waler beam - a horizontal member used to provide lateral support for a vertical wall or excavation
For a custom-cut roof structure, how much greater than the cut end of a rafter does the ridge width need to be
a) 0”
b) 1/2”
c) 2”
d) 3”
0”
The ridge board must not be less than the width of these cut ends of the rafter
In general, an asphalt shingle should have a weather exposure of
a) 5”
b) 5 1/2”
c) 5 3/8”
d) 6 1/2”
5 “
Disabled grab bars should be installed with
a) brackets and nails
b) brackets and super glue
c) brackets and screws
d) brackets and anchor bolts
brackets and screws
What is the minimum width of a disabled access door?
a) 30”
b) 34”
c) 36”
d) 40”
36”
put all disable info here
When would a basement be included in the total allowable area calculated for a building?
a) never
b) always
c) sometimes
d) depends on building code
sometimes
Where is a 4 prong outlet plug used?
a) within 6ft of a sink
b) outside of a building
c) at the service to a house trailer or RV
d) by the pool
at the service to a house or RV
Don’t understand this one
How many continuous watts of load are permitted in a 12 gauge branch circuit
a) 1500
b) 2000
c) 2500
d) 3000
2000
.8 * 20 * 125 = 2000
12 gauge - 20A
14 gauge - 15A, 1500, .8 * 15 * 125 = 1500
Lower the gauge higher the amp
Watt - measure the amount of power that an electrical current can generate
volts - measure the force that causes electrons to flow through a conductor
amps - measure the rate at which electrons flow past a given point.
Ohms - measures resistance
What is the largest part of the cantilevered beam that can extend unsupported beyond a foundation
a) 1/4
b) 1/3
c) 1/2
d) 2/3
1/3
Max portion of beam can extend unsupported
How would you best determine if a soil is expansive
a) have the soil tested
b) add water until saturated
c) check with the landscaping contractor
d) pulverized it with a hammer while wearing safety glasses
have the soil tested
Expansive soil is soil that expands with water is added and shrinks when dry
to test - Expansive index test
When would you wet brick masonry
a) never
b) at any time
c) when temperature are above 32 degrees Fahrenheit
d) before building a brick wall in warm weather
before building a brick wall in warm weather
wet brick
-to prevent them from absorbing excessive moisture from the mortar
-much stronger than if the bricks were laid dry
-submerge it in water
“Mortar joint” refers to
a) wood joint
b) asphalt joint
c) vertical or horizontal joint between masonry joint
d) Pittsburgh joint
vertical or horizontal joint between masonry joint
Pittsburgh joint - metal sheets joints, HVAC
To determine if a wall is plumb, use a
a) leveling rod and transit
b) builder’s level
c) level and straight edge
d) framing square
level and straight edge - metal straight edge with leveler, what I normally use
Leveling rod and transit - what surveyors use
builder’s level - laser leveler
frame square - L shape metal, 90 degrees
Dividing watts by amps gives you
a) ohms
b) watts
c) volts
d) amp rating
volts
P(watts) = E(volts) x I(amps)
E = P/I gives you volts