NEC Article 480 contains _____.

a. requirements governing storage batteries for emergency electrical systems
b. information on transfer switches
c. installation requirements for legally required standby electrical systems
d. requirements for unit equipment


a. requirements governing storage batteries for emergency electrical systems

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Describe how a tool changing peripheral works.

What will be an ideal response?

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The higher the _______ of the pump, the more critical the shaft alignment.

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

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The process of combustion occurring without an open flame is called _________

A) Direct ignition B) Non-flame combustion C) Cold fusion D) Spontaneous combustion

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A waste spark ignition _______

A) Uses two coils for each spark plug B) Uses one coil for two spark plugs C) Fires two spark plugs at the same time D) Both B and C

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