Question 244General Subjects - QMED
70% to passTo get an accurate measurement using a 12 inch machinist's steel rule, you should measure _______________.
Aon the unmarked edge of the rule
Bfrom the one inch graduation mark
Con the narrow edge of the rule
Dfrom the zero end on the scale
AI Explanation
The correct answer is B) from the one inch graduation mark. When using a machinist's steel rule, the most accurate measurements are taken from the one inch graduation mark, not the zero end of the scale. This is because the metal end of the rule can flex or bend slightly, affecting the precision of the measurement if taken from the very end. By measuring from the one inch mark, you avoid this potential source of error and get a more reliable reading. The other options are incorrect because: A) the unmarked edge is not calibrated, C) measuring on the narrow edge would not provide a linear scale, and D) using the zero end can introduce measurement error due to the flexible metal.
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