There are two major types of overload relays: thermal and ____.
A. circuit
B. metallic
C. magnetic
D. electric
Answer: C
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The armature or rotating member of a DC motor is a cylindrical ____ assembly mounted directly on the motor shaft.
a. iron b. carbon c. graphite d. steel
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In a glass wall supported by cable trusses, the glass _______.
A) bears on (horizontal) rails. B) is connected to (vertical) mullions. C) A and B. D) none of the above.
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A(n)___________________ is a factory-made cable and ventilated metal framework system that is usually field-assembled.
Fill in the blank(s) with the appropriate word(s).
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Which element is not classified as a primary nutrient?
A) nitrogen B) phosphorus C) ?magnesium D) potassium
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