Question

what is the reading of this 0-25mm micrometer graduated in 0.001mm? enter your answer in the box below out to one thousandths of a mm. 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: Read main - scale value

The main - scale value is read from the fixed scale. Each division on the main scale is 0.5 mm. The main - scale reading is 9.5 mm as the 9.5 - mm mark on the main scale is visible.

Step2: Read thimble - scale value

The thimble scale has 50 divisions and each division represents 0.01 mm. The thimble - scale reading is 0.00 mm as the zero on the thimble scale lines up with the horizontal line on the main scale.

Step3: Calculate total reading

The total reading of the micrometer is the sum of the main - scale reading and the thimble - scale reading. So, the total reading is $9.5+0.00 = 9.500$ mm.

Answer:

9.500