The mating threads for ____ screws are created by the fasteners themselves.
A. lap
B. rivet
C. set
D. self-tapping
Answer: D
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The _____ is the most frequently used cutting tool.
A. trowel B. brick hammer C. brick set chisel D. concrete hammer
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What is virgin timber?
What will be an ideal response?
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Organic chemicals whose structures have positively charged groups tend to be very immobile in the soil
Indicate whether the statement is true or false
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Hard hats offer protection against ____________.
A. flying objects B. bumping into hard objects C. falling objects D. a, b, and c
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