question_answer

Which of the following are the advantages of a hydraulic; shaper over mechanically driven shaper?

1. More strokes per minute can he obtained at a given cutting speed

2. The cutting strokes has a definite stopping point

3. It is simpler in construction

4. Cutting speed is constant throughout most of shecurl.

Select the correct answer using the codes given below:

A) 1 and 2            

B) 1 and 4

C) 2 and 4            

D) 1, 3 and 4