Readings from analog meters are generally limited to ____-digit accuracy.

a. two
b. three
c. four
d. six


b. three

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How do magnetic type overload relays operate?

What will be an ideal response?

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The evaporator fan is located in the outdoor unit in a split-system air-conditioner

Indicate whether the statement is true or false

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A two-line oil piping system is used when the oil supply level is below the burner because it _____

a. provides twice as much oil to the burner b. eliminates the need to bleed air from the lines c. provides a backup supply in case one pipe gets plugged d. prevents water from entering the tank

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____ are used in light meters for photographic equipment, instruction detectors, automatic door openers, and various kinds of test equipment to measure light intensity.

A. Light-emitting diodes B. Solar cells C. Photodiodes D. Photo cells

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