Of the following listed grades, which has little usefulness in mechanical drawing?
a. 4H
b. 2H
c. H
d. HB
e. 3B
e
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The PCV (positive crankcase ventilation) system helps to reduce which of these exhaust gases?
A) HC B) CO C) D) Both HC and CO
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In the United States, first-angle projection is usually used
Indicate whether the statement is true or false
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Which machining task would be done on abrasive-charged wheels? ?
A. ?tapping B. ?drilling C. ?cutting D. ?buffing
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Define nominal size.
What will be an ideal response?
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