When flex duct is hung or run over long distances it must be supported every _____ft with some sort of noncrimping hanger

A) 10 B) 20 C) 15 D) 5


D

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A column of water one foot high exerts a pressure of ____.

A. 0.396 psig B. 0.407 psig C. 0.433 psig D. 0.496 psig

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Early industrial machines vastly outperformed human counterparts in which of the following areas?

a. efficiency and productivity b. durability and maintenance costs c. adaptability and flexibility d. precision and accuracy

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The ratio of how much light is produced by a lamp (in lumens) to how much energy is consumed by the lamp (in watts) is known as

a. efficacy b. efficiency c. illumination cost d. energy cost

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What happens to the output signals of the conversion in an ADC interface module?

A) Both analog and digital output signal will be routed to an I/O, which can be interfaced to other devices. B) The analog output signal will be routed to an I/O connector, which can be interfaced to other devices. C) The digital output signal will be routed to an I/O connector, which can be interfaced to other devices. D) all of the above

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