CSLB B GENERAL

CSLB B GENERAL PTICH rise/span what size of a circuit breaker can be installed on a line with 7 outlets 14 AWG wire? 15 amp; according to code, the conductor ampacity rating for a 14 gauge wire is 15 amps. for 12 gauges wire is 20 amps. the number of outlets does not determine the size of circuit breaker. how many roof squares are in the roof measuring 45' by 50'? 22.5; (45x50) / 100 (roofing squares made of 10'x10'). total drop for a 120' pipe with a 2% slope? 2'5" = 120x2%=2.4 how many 4"x4" tiles do you need to tile 30"x60" shower floor and three walls 60" high with 1/4" grout? allow 10% for waste. step 1: calculate total area: shower pan: 30"x60" = 1800 square inches. two small walls 2 @( 30"x60")= 3600 square inches. back wall= 60"x60"=3600 total= 9000 square inches. step 2: calculate tile coverage including grout. 4 1/4" x4 1/4" = 18.0625 step 3: divide 9000/18.0625 = 499 tiles step 4: add 10% 499x.10= 50 tiles 549 the load area of skylight is equal to inside dimension of a deck mounted skylight; inside area of the skylight curb; rough opening in the roof. how many kWh will be consumed by a 500w lightbulb running for 3 hours? 1.5 kWh. step one solve for total watt-hours= 500w x 3=1500 step 2 convert: 1 kilowatt= 1000 watt 1500/1000=1.5 how many board feet do you need for a wall 20' long with 2x4 studs 8 feet high spaced at 16 o.c.? Step 1: convert wall length and stud height into inches, by multiplying length by 12. wall: 20'x12=240" stud: 8'x12=96" step 2: divide wall length by the spacing of the studs 240"/16"= 15 studs + 1 starter= 16 studs total step 3: figure out board feet board feet= thickness in inches x width in inches x length in inches / 144. 2"x4"x96"/144=5.33 board feet per stud. step 4: multiply board feet by number of studs 5.33x16=85.28 board feet. which of the following is a low slope roof system modified bitumen; can be applied to a slope no less than 1/4:12 the slope of a roof is the sum of the ___ divided by the ____ rise;run calculate the total cost of trusses needed for a new framing project, where a gable roof is 50' long, each truss is spaced every 24" and the price of each truss is $80. 2080 what is a permanent or well-known elevation reference point? benchmark in a L shaped Kitchen, two parallel lines are 24' each and you are told that the remaining lines are 12' each. to install a hardwood floor, what area are you covering? 432 a brick wall has a total of 44 courses. if 3 bricks and 3 mortar joints equal 8", then how hieght is the wall 10 feet how many square feet is found in a single roofing square of composition shingles 100 square feet charging valve how many bundles of 30-year asphalt shingles are in a square of roofing 3 bundles who is finally responsible for an approved set of plans contractor the inverter requires minimum voltage unput of 350 volts, how many 48-volt modules need to be connected in a seires configuration to meet the minimum voltage input? in a series configuration, the sum of voltage all all individual moduels will equal to the total voltage output. divide voltage requirement by the voltage that is generated by each module. 350/48=7.29 what is the sf of a gable 12 ft wide and 6 ft high 36 sqft height xbase/2 which plan from a set of blueprints will give the true measurement of a rake elevation plan the job requires 28 construction squares for siding. how many sf of siding do you need to buy? 2800; 100 square feet in each construction square. a 1/6 roof pitch is equal to a ___ slope? 4/12; the pitch is the sum of the rise divided by the span. the slope is the sum of the rise divided by the run the roof pitch is 6/24, what is the rise given that the run is 17 feet? 8.5; step 1 find the span 17x2; find the actual pitch 6/24=x/34 how many 8"x8"x16" blocks are required for a wall 8 feet high and 60 feet long 540; find area of wall in inches 8x12=96 60x12=720 area: 96x720=69120 height and length of block 8x16=128 divide 69120/128 you are bidding on a project that requires 86 board feet. the price per board foot is $1.20 with a sales tax of 8% what would the total cost for 86 board feet? 111 what is the minimum required cross-sectional area of the flue for a 14 feet tall fireplace with an opening 20"x24"? 60; 20x24 =480 480 x 1/8= 60 sq in how many cubic yards of concrete is required for a 4" slab with the circumference of 25 feet? 3/4 cubic yards c=25 diameter= 25/3.14=7.96 radius= diameter/2= 3.98 area of circle 3.14xrxr 49.74 multiply area by depth 49.74x.333= 16.56 convert into years 16.56 / 27 = .61 how is leveling performed establish a benchmark and use a level how many cubic yards of concrete do you need for a 4" slab with an area of 20'x40'. 10 cu yds; solve the total volume of the slab of concrete in cubic feet. then divide the volume by 27. in most cases where will brace walls be placed? at each end of brace lines wood structural paneling would normally be nailed with 8d nails at 6"o.c. at edges and 12" o.c. in field what type of equipment is used to remove nails sawzall toenailing is an important technique used in framing. best results are achieved when? using framing nails, entering top piece at a height equivalent to 1/3 the height of the nail. per every 150 square foot on enclosed roof cavity____ of ventilation surface must be provided 1 square foot when two opposing roof slopes descend or merge at a horizontal trough within the roof deck, a ____ is formed. hog valley standard interlayment used for wood shake roof systems over 4:12 pitch consists of #30 LB asphalt impregnated organic felt when applying sheathing horizontally corners should be offset; small gap between sheets; edges of sheets should be slightly set back from wall corners when can floor joists be spaced more than 16" o.c. rest on a wall with studs at 24" o.c.? Joists must not be more than 5 inches from a supporting stud I-frames can add to the final cost of a project but have the advantage of