____ ventilation provides equal parts supply and exhaust air through the use of fans.

A. Exhaust
B. Balanced
C. Supply-only
D. Pressurized


Answer: B

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An advantage of using galvanized sheet metal over other materials when assembling a duct system is it _____.

a. is very quiet b. is resistant to corrosion c. is the least expensive d. exhibits the lowest heat loss

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Skin exposure to concrete or mortar can cause _____.

a. silicosis b. scoliosis c. cement dermatitis d. osmosis

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Read the setting on this metric micrometer scale graduated in 0.01 mm.

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

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Traditional methods of capacity control for centrifugal compressors include:

A) Adjustable pitch impellers. B) Cylinder unloading. C) Discharge outlet vanes. D) Variable inlet vanes and motor speed control.

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