CSLB ConCrete C8 LiCenSe PraCtiCe teSt #1 || MoSt reCent eXaM
2026/27 aCtUaL CoMPLete reaL eXaM QUeStionS anD CorreCt
anSWerS (VeriFieD anSWerS) aLreaDY GraDeD a+ | GUaranteeD
SUCCeSS!! neWeSt eXaM | JUSt reLeaSeD!
What is the volume of a cylinder if the diameter equals 3 feet and the length equals to 12 feet? -
CorreCt 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? - CorreCt anSWer-In round columns
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.
One cubic foot of cement weighs approximately: - CorreCt anSWer-95 lbs
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
The normal tolerance for the location of bends and ends of reinforcing bar is: - CorreCt 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? - 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 = 21322.5 cubic feetConvert the volume into cubic
yards.21322.5 ÷ 27 = 789.72 cubic yards
When can the live load be calculated by multiplying the height, width and length of a pour and
dividing by the deadload? - CorreCt anSWer-Never
Tensile strength in concrete is achieved by: - CorreCt anSWer-The use of steel reinforcement.
Refer to the house plan. What is the total cost for the foundation slab if the contractor charges $3.54
per square foot? - CorreCt anSWer-$6524.90
Explanation:
2026/27 aCtUaL CoMPLete reaL eXaM QUeStionS anD CorreCt
anSWerS (VeriFieD anSWerS) aLreaDY GraDeD a+ | GUaranteeD
SUCCeSS!! neWeSt eXaM | JUSt reLeaSeD!
What is the volume of a cylinder if the diameter equals 3 feet and the length equals to 12 feet? -
CorreCt 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? - CorreCt anSWer-In round columns
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.
One cubic foot of cement weighs approximately: - CorreCt anSWer-95 lbs
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
The normal tolerance for the location of bends and ends of reinforcing bar is: - CorreCt 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? - 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 = 21322.5 cubic feetConvert the volume into cubic
yards.21322.5 ÷ 27 = 789.72 cubic yards
When can the live load be calculated by multiplying the height, width and length of a pour and
dividing by the deadload? - CorreCt anSWer-Never
Tensile strength in concrete is achieved by: - CorreCt anSWer-The use of steel reinforcement.
Refer to the house plan. What is the total cost for the foundation slab if the contractor charges $3.54
per square foot? - CorreCt anSWer-$6524.90
Explanation:
