CSLB CONCRETE C8 LICENCE PRACTICE
TEST 1 FINAL EXAM WITH REAL
QUESTIONS AND WELL VERIFIED
ANSWERS WITH 200 REAL QUESTIONS //
GRADED A+ // LATEST
... [Show More] 2024/2025 // CSLB
CONCRETE C8
How many cubic yards of concrete is required for the footing shown, if it is 75 feet
long? - ANSWER-2 ½ cubic yards
Explanation:
Step 1: Figure out the area of the face of the footing. Top area = 6" x 9" = 54
square inches Bottom area = 6" x 12" = 72 square inches Total area = 54 + 72 =
126 square inches Step 2: Convert square inches into square feet.126 ÷ 144 = 0.875
square feet Step 3: Get volume by multiplying the previous answer by the
length.0.875 x 75 = 65.625 cubic feet Step 4: Convert cubic feet into cubic
yards.65.625 ÷ 27 = 2.43 cubic yards Since there is no exact answer, round up the
number.
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 Method Use the following formula: Area of the circle = π x r x
where 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 Method Area 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 feet Multiply 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 yards of concrete is required for a 4" slab with the diameter of 15
feet? - ANSWER-2 ½ cubic yards
Explanation:
Traditional Method Use the following formula: Area of the circle = π x r x where 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 feet Convert cubic feet into
cubic yards.58.82 ÷ 27 = 2.18 cubic yards Since 2.18 is not a given option, round
up the number to 2.5 cubic yards Shortcut Method This 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 feet Area of the circle = 225 x .785 = 176.625 square feet Divide the
volume by 81 to solve for the cubic yards for a 4" slab.176.625 ÷ 81 = 2.18 cubic
yards Since 2.18 is not a given option, round up the number to 2.5 cubic yards [Show Less]
