Question

what is used to rate the coarseness of a band saws blade?
revolutions per minute
teeth per inch
length of the blades teeth
hardness of the blades teeth

Explanation:

The coarseness of a band - saw blade is rated by the number of teeth per inch. Fewer teeth per inch indicate a coarser blade, while more teeth per inch mean a finer blade. Revolutions per minute relate to the speed of the saw, not blade coarseness. The length and hardness of the blade's teeth do not rate coarseness.

Answer:

B. teeth per inch