Question

what is the reading of this 1 - 2\ micrometer? enter your answer in the box below out to ten thousandths of an inch. if you need a bigger picture, right click on the image and select \open image in new tab\ (chrome browser - other browsers may have slightly different wording).

Explanation:

Step1: Identify main - scale reading

The main - scale reading is 1.0000 inches (since it is a 1 - 2" micrometer and the main - scale value before the thimble starts rotating is 1 inch).

Step2: Identify thimble reading

The thimble has 50 divisions for 0.025 inches. Each division is $\frac{0.025}{50}=0.0005$ inches. The thimble reading is at 10 divisions, so the thimble reading is $10\times0.0005 = 0.0050$ inches.

Step3: Calculate total reading

The total reading is the sum of the main - scale reading and the thimble reading. So, $1.0000+0.0050 = 1.0050$ inches.

Answer:

1.0050