Why must electrical contacts never be permitted to open or close too slowly?
What will be an ideal response?
This produces poor contact pressure and will cause the contacts to burn or will cause erratic operation of the equipment they are intended to control.
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Describe the properties of magnetic flux.
What will be an ideal response?
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Describe inductance.
What will be an ideal response?
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Choose the correct formula to solve the problem.
A circuit has a voltage of 120 volts and a current of 7.5 amps. Find the amount of power used.
Fill in the blank(s) with the appropriate word(s).
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A minimum of ____ is usually placed between window openings.
A. 2'' (50 mm) B. 3'' (75 mm) C. 6'' (150 mm) D. 12'' (300 mm)
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