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How many cubic yards of concrete is required for a 4"
slab with the
circumference of 25 feet? - ANSWER -3/4
cubic yard(s)
Explanation:
Since the circumference was provided to calculate the area of
the circle, we need to figure out the diameter and/or radius to
solve the problem.Circumference = 25Diameter =
Circumference (25') ÷ π (or 3.14) = 7.96 feetRadius = Diameter
(7.96') ÷ 2 = 3.98 feetTraditional MethodUse the following
formula:Area of the circle = π x r x rWhere π = 3.14 and radius
(r) = 3.98 feetArea = 3.14 x 3.98 x 3.98Area = 49.74 sq. ft.Multiply
area by the depth of the slab (in feet) to find the volume in cubic
feet.49.74 x .333 = 16.56 cubic feetConvert cubic feet into cubic
yards.16.56 ÷ 27 = 0.61 cu yds (round up to 3/4)Shortcut
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%.Diameter =
,7.96'Area of the square = 7.96' x 7.96' = 63.36 square feetArea of
the circle = 63.36 x .785 = 49.74 square feetDivide the volume by
81 to solve for the cubic yards for a 4" slab.49.74 ÷ 81 = 0.61 cu
yds (round up to 3/4)
The main field of the slab must be reinforced with an ___
by ___ grid. -
ANSWER -
18"...18"
How many cubic yards of concrete is required for a 4" slab with
the radius of 10
feet? - ANSWER -3.87 cubic
yards
Explanation:
Traditional MethodUse the following formula:Area of the circle
= π x r x rWhere π = 3.14 and radius (r) = 10 feet (half of the
diameter length)Area = 3.14 x 10 x 10Area = 314 sq. ft.Multiply
area by the depth of the slab (in feet) to find the volume in cubic
feet.314 x .333 = 104.562 cubic feetConvert cubic feet into cubic
yards.104.562 ÷ 27 = 3.87 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%.Diameter =
radius x 2 = 20'Area of the square = 20' x 20' = 400 square
feetArea of the circle
= 400 x .785 = 314 square feetDivide the volume by 81 to solve
for the cubic
, yards for a 4" slab.314 ÷ 81 = 3.87
cubic yards
What is the standard overlap for #4 rebar? - ANSWER -15"
Explanation:
According to the California Building Code, the standard overlap
should be 30 times the diameter of the rebar.30 x ½" = 15"
At what times, during set-up, is it important to pay special
attention to keeping
concrete sufficiently moist? - ANSWER -In hot and
cold weather.
Explanation:
Cold weather reduces air humidity, hot weather
increases evaporation.
What is the minimum mixing time for a mixture of 1 cubic yard?
- ANSWER -1
minute
Explanation:
Specifications usually require a minimum of 1 minute mixing
for mixtures of 1 cu yd capacity. It increases 15 seconds for
each additional ½ cu yd of additional mixture.
What class of formwork is used for temporary or light loads? -
ANSWER -Class
2026-2027 Actual Complete Real Exam Questions And
Correct Answers (Verified Answers) Already Graded
A+ | Guaranteed Success!! Newest Exam | Just
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How many cubic yards of concrete is required for a 4"
slab with the
circumference of 25 feet? - ANSWER -3/4
cubic yard(s)
Explanation:
Since the circumference was provided to calculate the area of
the circle, we need to figure out the diameter and/or radius to
solve the problem.Circumference = 25Diameter =
Circumference (25') ÷ π (or 3.14) = 7.96 feetRadius = Diameter
(7.96') ÷ 2 = 3.98 feetTraditional MethodUse the following
formula:Area of the circle = π x r x rWhere π = 3.14 and radius
(r) = 3.98 feetArea = 3.14 x 3.98 x 3.98Area = 49.74 sq. ft.Multiply
area by the depth of the slab (in feet) to find the volume in cubic
feet.49.74 x .333 = 16.56 cubic feetConvert cubic feet into cubic
yards.16.56 ÷ 27 = 0.61 cu yds (round up to 3/4)Shortcut
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%.Diameter =
,7.96'Area of the square = 7.96' x 7.96' = 63.36 square feetArea of
the circle = 63.36 x .785 = 49.74 square feetDivide the volume by
81 to solve for the cubic yards for a 4" slab.49.74 ÷ 81 = 0.61 cu
yds (round up to 3/4)
The main field of the slab must be reinforced with an ___
by ___ grid. -
ANSWER -
18"...18"
How many cubic yards of concrete is required for a 4" slab with
the radius of 10
feet? - ANSWER -3.87 cubic
yards
Explanation:
Traditional MethodUse the following formula:Area of the circle
= π x r x rWhere π = 3.14 and radius (r) = 10 feet (half of the
diameter length)Area = 3.14 x 10 x 10Area = 314 sq. ft.Multiply
area by the depth of the slab (in feet) to find the volume in cubic
feet.314 x .333 = 104.562 cubic feetConvert cubic feet into cubic
yards.104.562 ÷ 27 = 3.87 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%.Diameter =
radius x 2 = 20'Area of the square = 20' x 20' = 400 square
feetArea of the circle
= 400 x .785 = 314 square feetDivide the volume by 81 to solve
for the cubic
, yards for a 4" slab.314 ÷ 81 = 3.87
cubic yards
What is the standard overlap for #4 rebar? - ANSWER -15"
Explanation:
According to the California Building Code, the standard overlap
should be 30 times the diameter of the rebar.30 x ½" = 15"
At what times, during set-up, is it important to pay special
attention to keeping
concrete sufficiently moist? - ANSWER -In hot and
cold weather.
Explanation:
Cold weather reduces air humidity, hot weather
increases evaporation.
What is the minimum mixing time for a mixture of 1 cubic yard?
- ANSWER -1
minute
Explanation:
Specifications usually require a minimum of 1 minute mixing
for mixtures of 1 cu yd capacity. It increases 15 seconds for
each additional ½ cu yd of additional mixture.
What class of formwork is used for temporary or light loads? -
ANSWER -Class
