CSLB CONCRETE C8 LICENSE PRACTICE
TEST1:LATEST PREMIUM UPDATE
2024-2025|120 BRAND NEW EXAM
QUESTIONS AND CORRECT VERIFIED
ANSWERS WITH CLEAR
EXPLANATIONS,ALL GRADED
A+|GUARANTEED SUCCESS|LATEST
UPDATE
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 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:
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: = 2A = 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
TEST1:LATEST PREMIUM UPDATE
2024-2025|120 BRAND NEW EXAM
QUESTIONS AND CORRECT VERIFIED
ANSWERS WITH CLEAR
EXPLANATIONS,ALL GRADED
A+|GUARANTEED SUCCESS|LATEST
UPDATE
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 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:
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: = 2A = 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
