Question 491General Subjects - Assistant Engineer

The correct answer is D) 0.4815 inch. The reading on the micrometer scale shown in figure "D" of the illustration GS-0081 is 0.4815 inch. This can be determined by closely examining the position of the thimble-shaped scale in relation to the main scale on the micrometer. The thimble scale is aligned with the 48th mark on the main scale, and the markings on the thimble indicate a reading of 15 increments, which corresponds to 0.0015 inch. Adding this to the 48th mark on the main scale (0.4800 inch) results in the final reading of 0.4815 inch. The other answer choices are incorrect because they do not accurately match the reading shown in the illustration.