The correct answer is Choice b - lock.
After the micrometer is properly snug, the next step is to tighten the locking mechanism so that the spindle will not turn. The other three choices are not correct.
Answer:
B) Lock
Explanation:
Micrometer is a measuring instrument used for measuring minute distances. Modern micrometers are accurate down to one ten-thousandths of an inch.
Once a micrometer is properly snug, the lock mechanism is used in securing the spindle and ensure that measuring workpiece is not removed before the actual reading takes place.
