This written authorization is normally needed before a print can be changed by the drafting department.

a. ECR
b. ECN


a. ECR

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Water flows through a solar heater collector ?at a rate of 9.3 liters/sec.  Rounded off to 2 decimal places, convert this flow rate to gpm.

Fill in the blank(s) with the appropriate word(s).

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Natural gas is the cleanest burning of the fossil fuels and its combustion produces about _______________ percent less carbon dioxide compared to burning petroleum based fuels

Fill in the blank(s) with the appropriate word(s).

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The federal program that regulates organic agriculture in the United States is called:

a. National Organic Program c. Organic Agriculture Department b. Organic System Plan d. National Organic Department

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Friction between the slab and the soil causes cracking, which can be controlled by a(n) ____.

A. steel girder B. expansion joint C. contraction joint D. anchor bolt

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