____ can be placed at the beginning of each block of code to serve as a label for each block.
A) Tool-change commands
B) Program stop commands
C) Safe-start commands
D) Sequence numbers

Question

Quizplus · Accepted Answer

Sequence numbers can be placed at the beginning of each block of code to serve as a label for each block for easy reference and editing. Tool-change commands are used to change tools during the program, program stop commands are used to stop the program, and safe-start commands are used to ensure safe operation of the machine.

____ Can Be Placed at the Beginning of Each Block