What is one type of job (such as installing hand-guards or a buttstock) where you think it would be appropriate to complete your measurements using a tape or rule? When would you need a caliper? When would you need a micrometer?

Explain what the course text means when it says the dial indicator is used to measure ˜travel or play.
Another use for the dial indicator is measuring runout. Define the term runout, and cite one job or project you think a gunsmith might undertake in which measuring runout would be important.