Chapter 4 Flashcards

1
Q

Volume measurements are needed for which two categories of pay items?

A

Earthwork - such as burrow excavation and subsoil excavation
Concrete - the various classes of concrete used in bridges and other structures.

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2
Q

What is the pay item unit of measurement for volume?

A

Cubic yard (CY)

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3
Q

How many cubic feet does 1 cubic yard equal?

A

27 cubic feet

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4
Q

What are the two different methods of measurement Earthwork can utilize?

A

The use of cross sections and the use of truck measurements.

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5
Q

What is the common method of determining volumes from cross sections?

A

Average end area

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6
Q

What is the formula for average end area?

A

Volume (ft cubed) = ( Area 1 (ft squared) + Area 2 (ft squared) / 2) x Length (ft)

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7
Q

What is the formula used to measure volume?

A

Volume = Length x Width x Height

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8
Q

What is the formula used to measure the volume of trapezoidal solids?

A

V= a+b/2 x HW

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9
Q

What is the formula used to measure the volume of a cone solid?

A

V = pi R squared x H/3

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10
Q

What is the formula used to measure the volume of a cylindrical solid?

A

V = pi R squared x H

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11
Q

What is the prismoidal formula used to measure the volume of an odd irregular shape?

A

V = (A1 + A2 + 4Am)/ 6 x H

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12
Q

What does A1, A2 and Am mean in the prismoidal formula?

A

A1 and A2 correspond to the end areas of the object. Am corresponds to the cross sectional area located in the middle of the object.

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