Ladders used as exits must be located every 25' in any trench that is over _____.

a. 1' deep
b. 2' deep
c. 3' deep
d. 4' deep


d. 4' deep

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________ is the basis of nearly every enduring relationship in business.

A. Profit B. Compatibility C. Trust D. Need finding

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Day length varies with latitude

Indicate whether the statement is true or false

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

1. A lightning arrester for TV and radio antennas is simply a grounded wire brought close to, but not touching, the antenna. 2. Industries always use static charge as a tool. 3. Sandpaper grit can be made to lie flat as it is being applied to the paper backing by giving the sand particles a positive charge and the glue-covered paper backing a negative charge. 4. A neutron forcibly taken away from one neutral object and put on another neutral object has gained potential energy. 5. Electrostatic lines of force show the existence of a very real force between two electrically charged objects.

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Which of the following is considered to be excellent for use on underground pipes?

a. Phenolic insulation b. Cellular glass insulation c. Fiberglass pipe insulation d. XPS

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