Question

Which of the following are the rules of programming NC machine tools in APT language?              

1.   Only capital letters are used

2.   A period is placed at the end of each statement.

3.   Insertion of space does not affect the APT word.

Select the correct answer using the codes given below:

(a) 1 and 2                      (b) 2 and 3

(c) 1 and 3                      (d) 1 alone