What damper is the best choice when fully opened and fully closed are the primary damper positions?

a. Parallel blade
b. Opposed blade
c. Motorized
d. Lateral blade


a. Parallel blade

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Photodetectors that have both the transmitter and the receiver units mounted in the same housing depend on a reflector for operation.

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

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The Cuban insurrectos who wanted to overthrow Spanish rule in Cuba

A. were heavily dependent on American funding for their rebellion. B. blew up the battleship Maine. C. were Communist in their ideological outlook. D. began assassinating Spanish officials. E. adopted a scorched-earth policy of burning cane fields and sugar mills.

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If a source file contains ____ errors, it cannot be converted into an executable file.

A. syntax B. debugging C. compilation D. logic

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Motors that operate by using AC or DC power are called ____________________ motors.

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

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