Set 16 Practice Mode

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Q3250
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Which is 'A2' size in the engineering system of paper size?
Q3251
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Which is contained in title block of drawing sheet?
Q3252
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When a plane figure enclosed by more than four several straight lines is know as:
Q3253
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The lead becomes softer as the numeral before letter 'H' on pencil
Q3254
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Which is used in drawings to represent the edge of a solid object?