Which of the following treatment methods is used to control acidity?

a. softeners
b. neutralizing tanks
c. activated charcoal filters
d. manganese oxidizing filters


ANSWER: b

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In a DC contactor with two coils, the ____________________ coil is intended for momentary duty and not continuous operation.

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

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A privately sold vehicle will usually have a higher price than a vehicle sold at dealer retail

Indicate whether the statement is true or false

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Two common methods for measuring airflow in residential systems are

A) Velocity pressure transducers B) Temperature rise or static pressure drop C) Fan tip speed and a fan curve plot D) Electronic flow hoods

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Multiviews are views of an object in which the line of sight is ____ the surface of the object.

A. parallel to B. perpendicular to C. near D. none of the above

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