Question

micrometer measurement: read the correct value of this measured part. * 1 point 28.2 mm 28.17 mm 28.06 mm 31.17 mm

Explanation:

Step1: Determine the main scale reading

The main scale reading is \(28\) mm (since each main - scale division is \(1\) mm and we count the full millimeters).

Step2: Determine the thimble scale reading

The thimble scale has \(50\) divisions for \(0.5\) mm, so each division is \(\frac{0.5}{50}=0.01\) mm. The thimble scale line that aligns best with the main - scale line is at \(17\) divisions. So the thimble scale reading is \(17\times0.01 = 0.17\) mm.

Step3: Calculate the total reading

The total reading is the sum of the main - scale reading and the thimble - scale reading. So \(28+0.17=28.17\) mm.

Answer:

28.17 mm