A counter is to be programmed to keep track of the number of parts coming off a production line.If you wanted to subtract the number of rejected parts so your counter would count only the good parts,you would program:
A)two up-counters.
B)two down-counters.
C)an up/down-counter.
D)a counter with a transitional contact input.

Question

Quizplus · Accepted Answer

An up/down-counter can count both up and down, which means it can subtract the number of rejected parts from the total count of parts. This would be the best choice for counting only the good parts. Option A and B are not suitable as they can only perform counting in one direction, either up or down. Option D (transitional contact input) is not relevant to the task of counting only good parts.

A Counter Is to Be Programmed to Keep Track of the Number