The horse power transmitted through a pipe is maximum when the ratio of loss of head due to friction and total head supplied is________________?

A. head loss and discharge are same in two systems
B. length of pipe and discharge are same in two systems
C. friction factor and length are same in two systems
D. length and diameter are same in two systems

A. energy/unit area
B. distance
C. both of the above
D. it has no units
E. none of the above

A. current meter
B. venturimeter
C. pitot tube
D. hotwire anemometer