CSLB GENERAL B PRACTICE QUESTIONS
COMPREHENSIVE ASSESSMENT PAPER
QUESTIONS AND SOLUTIONS GRADED A+
FULLY UPDATED
⩥ what size of a circuit breaker can be installed on a line with 7
outlets 14 AWG wire?.
Answer: 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'?.
Answer: 22.5; (45x50) / 100 (roofing squares made of 10'x10').
⩥ total drop for a 120' pipe with a 2% slope?.
Answer: 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..
,Answer: 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.
Answer: 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?.
Answer: 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.?.
Answer: 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.
Answer: 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 ____.
Answer: 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..
Answer: 2080
⩥ what is a permanent or well-known elevation reference
point?.
Answer: 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?.
Answer: 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.
Answer: 10 feet
⩥ how many square feet is found in a single roofing square of
composition shingles.
Answer: 100 square feet
COMPREHENSIVE ASSESSMENT PAPER
QUESTIONS AND SOLUTIONS GRADED A+
FULLY UPDATED
⩥ what size of a circuit breaker can be installed on a line with 7
outlets 14 AWG wire?.
Answer: 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'?.
Answer: 22.5; (45x50) / 100 (roofing squares made of 10'x10').
⩥ total drop for a 120' pipe with a 2% slope?.
Answer: 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..
,Answer: 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.
Answer: 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?.
Answer: 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.?.
Answer: 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.
Answer: 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 ____.
Answer: 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..
Answer: 2080
⩥ what is a permanent or well-known elevation reference
point?.
Answer: 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?.
Answer: 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.
Answer: 10 feet
⩥ how many square feet is found in a single roofing square of
composition shingles.
Answer: 100 square feet
