General Chapter 09

Question 1

What type of precision measuring instruments 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 over-tightened, the frame may be Sprung, OR Continually sliding objects between the anvil and the spindle may wear the surfaces.