_____ mortar boxes are considerably lighter in weight than traditional mortar boxes.

A. Polyethylene plastic
B. Wooden
C. Carbon steel
D. Stainless steel


Answer: A

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a. A b. B c. C d. D

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The two basic types of letters on working drwings are ______ and _________ letters.

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

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