What is the least protective type of junction box that can be used in chemical plants?

a. Type 3R - Rainproof, Sleet Resistant
b. Type 4X - Watertight, Corrosion Resistant
c. Type 7 - Hazardous Locations, Class I
d. Type 9 - Hazardous Locations, Class II


b. Type 4X - Watertight, Corrosion Resistant

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The power supply provided to a zone control panel is typically _____.

a. 24VAC b. 24VDC c. 120VAC d. 240VAC

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As populations grew, cities had to install sewage disposal systems to take care of the large amounts of wastes

Indicate whether the statement is true or false

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Other methods of printing construction drawings.

A. drafter B. ipad C. copy machine D. CAD computer, desktops

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The hazard class of materials indicates the degree of _____ associated with those materials.

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

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