suction pipe is short and pump is running at low speeds

delivery pipe is long and pump is running at high speeds

suction pipe is short and delivery pipe is long and the pump is running at low speeds

suction pipe is long and delivery pipe is short and the pump is running at high speeds

proportional to diameter of impeller

proportional to speed of impeller

proportional to diameter and speed of impeller

none of the above

smoothen the flow

reduce suction head

increases delivery head

reduce acceleration head

diameter

square of diameter

cute of diameter

fourth power of diameters

no flow will take place

cavitation will be formed

efficiency will be low

excessive power will be consumed