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CSLB CONCRETE C8 LICENSE PRACTICE TEST 1,2,3
AND 4 NEWEST 2025 EXAM NEWEST COMPLETE 300
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED
A+||LATEST VERSION!!
What is the volume of a cylinder if the diameter equals 3
feet and the length equals to 12 feet? - Answer-84.78
cubic feet
Explanation:
There are two ways to solve the problem. However,
regardless of which method is used, you need to first
determine the area of the circle then multiply it by the
length.Traditional MethodUse the following formula:Area of
the circle = π x r x rWhere π = 3.14 and radius (r) = 1.5
feet (half of the diameter length)Area = 3.14 x 1.5 x
1.5Area = 7.065 sq. ft.Multiply area by the length to find
the volume.7.065 x 12 = 84.78Shortcut MethodArea of the
circle is 78.5% of the square. Treat the circle as a square
and solve for the area.Find the area of the square instead
of the circle.3' x 3' = 9 sq. ft.Since circle is 78.5% of the
square, multiply area of the square by 78.5% (or .785 if
there is no percentage sign on the calculator).9 sq. ft. x
,2|Page
.785 = 7.065 square feetMultiply area by the length to find
the volume.7.065 x 12 = 84.78 cubic feet
Where are spiral rebar ties used? - Answer-In round
columns
Control joints in sidewalks should be spaced at what
intervals? - Answer-Equal to the width of the slab
Explanation:
Generally the control joints in sidewalks should be spaced
equal to the width of the slab, but not more than 6 feet
apart.
One cubic foot of cement weighs approximately: - Answer-
95 lbs
How many cubic yard of concrete is required for a 4" slab
with the diameter of 15 feet? - Answer-2 ½ cubic yards
Explanation:
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Traditional MethodUse the following formula:Area of the
circle = π x r x rWhere π = 3.14 and radius (r) = 7.5 feet
(half of the diameter length)Area = 3.14 x 7.5 x 7.5Area =
176.625 sq. ft.Multiply area by the depth of the slab (in
feet) to find the volume in cubic feet.176.625 x .333 =
58.82 cubic feetConvert cubic feet into cubic yards.58.82 ÷
27 = 2.18 cubic yardsSince 2.18 is not a given option,
round up the number to 2.5 cubic yardsShortcut
MethodThis problem can be solved using a much simpler
method. First is to find the area of the square, then convert
it into the area of the circle by multiplying it by 78.5%.Area
of the square = 15' x 15' = 225 square feetArea of the
circle = 225 x .785 = 176.625 square feetDivide the
volume by 81 to solve for the cubic yards for a 4"
slab.176.625 ÷ 81 = 2.18 cubic yardsSince 2.18 is not a
given option, round up the number to 2.5 cubic yards
The normal tolerance for the location of bends and ends of
reinforcing bar is: - Answer-+/- 2 inches
How many cubic yards of backfill are required for a 3' x 5'
trench, 1500 ft long, with a 1 foot diameter pipe? - Answer-
789.72
Explanation:
CSLB CONCRETE C8 LICENSE PRACTICE TEST 1,2,3
AND 4 NEWEST 2025 EXAM NEWEST COMPLETE 300
QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED
A+||LATEST VERSION!!
What is the volume of a cylinder if the diameter equals 3
feet and the length equals to 12 feet? - Answer-84.78
cubic feet
Explanation:
There are two ways to solve the problem. However,
regardless of which method is used, you need to first
determine the area of the circle then multiply it by the
length.Traditional MethodUse the following formula:Area of
the circle = π x r x rWhere π = 3.14 and radius (r) = 1.5
feet (half of the diameter length)Area = 3.14 x 1.5 x
1.5Area = 7.065 sq. ft.Multiply area by the length to find
the volume.7.065 x 12 = 84.78Shortcut MethodArea of the
circle is 78.5% of the square. Treat the circle as a square
and solve for the area.Find the area of the square instead
of the circle.3' x 3' = 9 sq. ft.Since circle is 78.5% of the
square, multiply area of the square by 78.5% (or .785 if
there is no percentage sign on the calculator).9 sq. ft. x
,2|Page
.785 = 7.065 square feetMultiply area by the length to find
the volume.7.065 x 12 = 84.78 cubic feet
Where are spiral rebar ties used? - Answer-In round
columns
Control joints in sidewalks should be spaced at what
intervals? - Answer-Equal to the width of the slab
Explanation:
Generally the control joints in sidewalks should be spaced
equal to the width of the slab, but not more than 6 feet
apart.
One cubic foot of cement weighs approximately: - Answer-
95 lbs
How many cubic yard of concrete is required for a 4" slab
with the diameter of 15 feet? - Answer-2 ½ cubic yards
Explanation:
, 3|Page
Traditional MethodUse the following formula:Area of the
circle = π x r x rWhere π = 3.14 and radius (r) = 7.5 feet
(half of the diameter length)Area = 3.14 x 7.5 x 7.5Area =
176.625 sq. ft.Multiply area by the depth of the slab (in
feet) to find the volume in cubic feet.176.625 x .333 =
58.82 cubic feetConvert cubic feet into cubic yards.58.82 ÷
27 = 2.18 cubic yardsSince 2.18 is not a given option,
round up the number to 2.5 cubic yardsShortcut
MethodThis problem can be solved using a much simpler
method. First is to find the area of the square, then convert
it into the area of the circle by multiplying it by 78.5%.Area
of the square = 15' x 15' = 225 square feetArea of the
circle = 225 x .785 = 176.625 square feetDivide the
volume by 81 to solve for the cubic yards for a 4"
slab.176.625 ÷ 81 = 2.18 cubic yardsSince 2.18 is not a
given option, round up the number to 2.5 cubic yards
The normal tolerance for the location of bends and ends of
reinforcing bar is: - Answer-+/- 2 inches
How many cubic yards of backfill are required for a 3' x 5'
trench, 1500 ft long, with a 1 foot diameter pipe? - Answer-
789.72
Explanation:
