Why must an arcing device be contained within a special enclosure?

a. To prevent the ignition of hazardous vapors
b. To keep out dust and protect the device
c. To allow gases and vapors to enter the conduit system
d. To lock out any unauthorized users of the device


a. To prevent the ignition of hazardous vapors

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What will be an ideal response?

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Which dimension system allows dimensions to be read from the bottom and from the right? When can a dimension be read from the left?

What will be an ideal response?

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Most A/C systems first pass the air through the _______ as it enters the vehicle

A) Heater core B) Dash vents C) Floor vents D) Evaporator

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The chemical mil gauge has a spring-loaded magnet with a ruler-type scale for checking paint thickness.

Answer the following statement true (T) or false (F)

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