CSLB Concrete C8 License
Practice |2026 UPDATE |ACTUAL
EXAM QUESTIONS AND
VERIFIED ANSWERS/ACCURATE
SOLUTIONS |GET IT 100%
CORRECT!! ALREADY GRADED
A+
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 .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:
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
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
Practice |2026 UPDATE |ACTUAL
EXAM QUESTIONS AND
VERIFIED ANSWERS/ACCURATE
SOLUTIONS |GET IT 100%
CORRECT!! ALREADY GRADED
A+
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 .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:
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
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
