Before changing the blade in an electric circular saw, you should:

A) Place a screwdriver down in the motor section to prevent the saw from starting.
B) Work quickly to reduce the chance of the saw starting.
C) Unplug the saw.
D) Put on heavy gloves.


C

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The material used to provide weather protection is often chosen for its architectural style.

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

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What friction rate should be used to size a duct for a design friction rate of 0.12 in WC if the duct has a total equivalent length of 150 ft?

A) 0.1 in wc because that is the standard factor B) 0.12 × (150/100 ) = 0.12 × 1.5 = 0.18 in WC C) 0.12 × (100/150 ) = 0.67 × 0.12 = 0.08 in WC D) 0.12 in WC because the duct length is irrelevant

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Safety glasses must be _________________ as safety glasses.

A. designed B. listed C. worn only D. a and b

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Copper wire sizes are measured in circular mils.

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

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