Hand Tools and Measuring Devices

Question 1

What type od precision measuring instrument can be used to measure the outside dimensions of aircraft parts?

Answer 1

Outside micrometers and vernier calipers.

Question 2

For what reasons should a micrometer be periodically calibrated?

Answer 2

If dropped, its accuracy may be affected, or if the spindle is overtightened, the frame may be sprung, or continually sliding objects between the anvil and the spindle may wear the surfaces.