The purpose of a commutator in a dc generator is to:
A) concentrate flux density. B) provide filtration.
C) keep current flowing in one direction. D) maximize the current generated.
C
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Describe how wood can be attacked by fungi.
What will be an ideal response?
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List at least three common chimney problems that must be checked.
What will be an ideal response?
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A stick-built glass curtain wall consists of _______.
A) rails and glass. B) mullions and glass. C) mullions, rails, and preassembled units. D) mullions, rails, and glass. E) preassembled units and glass.
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What is the most abundant element on earth?
A) Water B) Nitrogen C) Oxygen D) Hydrogen
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