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CSLB Concrete C8 License Practice Test #1 Latest Update Questions and 100% Verified Correct Answers Actual Exam Guaranteed A+ Brand NEW!!!!!!!$20.99
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CSLB Concrete C8 License Practice Test #1
Latest Update 2024-2025 100 Questions and
100% Verified Correct Answers Actual Exam
Guaranteed A+ Brand NEW!!!!!!!
A mix with a higher percentage of rock has the advantage of: - CORRECT ANSWER:
Being less expensive.
A standard truck load of concrete is around 10 cubic yards of material. In a pour with an
average depth of 8 inches, and a width and length of 12 by 32 feet, how much will the
second truck need to bring? - CORRECT ANSWER: One load was enough
Explanation:
Step 1. Solve for the volume of the pour: 12 x 32 x 8/12 (or 0.667) = 256.128 cubic
feetStep 2. Convert cubic feet into cubic yards.256.128 ÷ 27 = 9.49 cubic yardsSince
one truck carries 10 cubic yards of concrete, one truck will be enough for the pour.
Air-entraining: - CORRECT ANSWER: Improves the working life of concrete.
At what times, during set-up, is it important to pay special attention to keeping concrete
sufficiently moist? - CORRECT ANSWER: In hot and cold weather.
Explanation:
Cold weather reduces air humidity, hot weather increases evaporation.
Bundled reinforcing bars are normally required to have a minimum cover of at least the
diameter of the bundle, except in the case of permanent proximity to earth where the
minimum will be: - CORRECT ANSWER: 3 inches
Compacting placed concrete is advisable because of: - CORRECT ANSWER: Higher
cured strength.
,Construction joints are: - CORRECT ANSWER: Joints designed to separate one pour
from another.
Construction loads are: - CORRECT ANSWER: The maximum loads to which a
structure will ever be subjected.
Control joints in sidewalks should be spaced at what intervals? - CORRECT 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.
Finishing with a steel float: - CORRECT ANSWER: Reduces risk of cracking.
For quick dry applications you would most commonly use which kind of concrete? -
CORRECT ANSWER: Type 3
From an engineering perspective, concrete has the advantage of high compressive
strength. Maximum strength is reached after: - CORRECT ANSWER: 28 days
Green concrete is: - CORRECT ANSWER: Concrete that has been treated for water
exposure
High-early: - CORRECT ANSWER: Is cured after 7 days.
How long can a batch of concrete be in the truck before considerations of quality arise?
- CORRECT ANSWER: 45 minutes
, How many cubic yard of concrete is required for a 4" slab with the diameter of 15 feet? -
CORRECT 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 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
How many cubic yard of concrete is required for the footing shown, if it is 75 feet long? -
CORRECT 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
inchesBottom area = 6" x 12" = 72 square inchesTotal area = 54 + 72 = 126 square
inchesStep 2: Convert square inches into square feet.126 ÷ 144 = 0.875 square
feetStep 3: Get volume by multiplying the previous answer by the length.0.875 x 75 =
65.625 cubic feetStep 4: Convert cubic feet into cubic yards.65.625 ÷ 27 = 2.43 cubic
yardsSince there is no exact answer, round up the number.
How many cubic yards of backfill are required for a 3' x 5' trench, 1500 ft long, with a 1
foot diameter pipe? - CORRECT ANSWER: 789.72
Explanation:
Step 1. Find the net face area of the trench deducting for pipe.Face area including pipe:
3 x 5 = 15 square feetArea of the pipe: 𝐴=𝜋𝑟2A = 3.14 x .5 x .5A = 0.785Find the face
area of the trench minus area of the pipe, which will give you the net area for the
backfill.15 - 0.785 = 14.215Step 2. Find the total volume of the backfill.14.215 x 1500 =
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