Commercial available medium size machines have a speed range of ______ .
A
200 to 400 r.p.m.
B
600 to 1000 r.p.m.
C
1000 to 1500 r.p.m.
D
2000 to 2500 r.p.m.
Correct Answer: 2000 to 2500 r.p.m.