The dangerous by-product of poor combustion of gas is _________________________.

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


carbon monoxide

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In the Ward Leonard system, a DC shunt generator with field control is driven by a(n) ____.

a. induction motor b. transformer c. precision controller d. chain drive

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What is the most common type of sunload sensor?

A) Photo diode B) Potentiometer C) NTC thermistor D) PTC thermistor

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Many commercial and industrial complexes use a(n) ____________________ to heat water that is supplied to heat transfer devices that condition the air in a structure or zone.

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

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A frame relay switch placed at the customer premises is used to interface to the customer's end equipment — DCE

Indicate whether the statement is true or false

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