Examveda

# The critical speed of a trommel (N) is related to its dia (D) as

A. $${\text{N}} \propto \frac{1}{{\sqrt {\text{D}} }}$$

B. $${\text{N}} \propto \sqrt {\text{D}}$$

C. $${\text{N}} \propto {\text{D}}$$

D. $${\text{N}} \propto \frac{1}{{\text{D}}}$$