The term ____ refers to a thin, inclined straight line terminating in an arrowhead.

A. extension
B. leader
C. feature
D. dimension


Answer: B

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Battery vents are used in commercial buildings _____.

a. only for fixtures on the top floor b. to connect a series of fixtures c. where electric power might be lost d. with high-efficiency fixtures

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Which of the following is a characteristic that helps distinguish fans from blowers?

a. Fans always require more horsepower to move the same volume of air as a blower. b. Fans are able to perform better than blowers when the resistance to airflow is high. c. The airflow is normally parallel to the shaft of a blower. d. The airflow is normally parallel to the shaft of a fan.

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What is the most abundant element in the known universe?

A. oxygen B. carbon C. iron D. hydrogen

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The step-motor valve uses a small motor to control the valve's port, which in turn controls evaporator superheat.

Answer the following statement true (T) or false (F)

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