Which of the following is the best insulating material for covering the radius surfaces of rectangular duct elbows?

a. Fiberglass duct wrap
b. Rigid fiberglass board
c. Beveled strips of fiberglass board
d. Pipe and tank insulation


d. Pipe and tank insulation

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A carbon arc torch is a device that holds two carbon sticks and produces a ____ from the energy of an

electric welder.

a. current c. stream b. flame d. spark

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One example of definition includes who will buy this product

Indicate whether the statement is true or false

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Describe and explain the basic function of the vernier caliper.

What will be an ideal response?

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Places where tapered board edges meet each other are described as _____

a. flat joints b. seams c. intersections d. butt joints

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