Portland Cement Sets and Gains Strength by Virtue of Its

question 5

Multiple Choice

Portland cement sets and gains strength by virtue of its chemical reaction with

• A)water.
• B)carbon dioxide in air.
• C)oxygen in air.
• D)aggregates.
• E)none of the above.

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Definitions:

Variable Cost

Charges that adjust according to the volume of goods produced or services provided.

Output

The total quantity of goods or services produced by a firm or industry during a specific period.

Labor

Describes the use of human physical and mental capabilities in creating products and services.

Average-Variable-Cost Curve

The average-variable-cost curve graphs the unit variable cost against the level of output, typically showing a U-shaped curve due to economies and diseconomies of scale.