Opening a drain or blowdown valve on an operating boiler can result in _____

a. boiler damage
b. flash steam
c. a rise in boiler operating pressure
d. valve failure


b

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In the retail market, ÒhothouseÓ vegetables command higher prices than field production vegetables

Indicate whether the statement is true or false.

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The name of the first ambassador to Mexico who introduced poinsettias to the United States is _____

A) F. Church B) R. Nixon C) W. I. Greenhouse D) J. R. Poinsett

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Water-cooled condensers using sea water are usually piped to permit periodic cleaning by ____.

A. brushing the tubes B. acid treatment C. back finishing D. all of the above

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An energy recovery ventilator

A) exchanges sensible heat and humidity between the intake and exhaust air streams B) exchanges humidity between the intake and exhaust air streams C) exchanges position between the intake and exhaust air streams D) exchanges sensible heat between the intake and exhaust air streams

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