remains same

increases

decreases

none of the above

Decreases

Increases

remains same

None of the above

low velocity

high velocity

low pressure

high pressure

causes noise and vibration of various parts

reduces the discharge of a turbine

causes sudden drop in power output and efficiency

all of the above

Installing the turbine below the tail race level

Using stainless steel runner of the turbine

providing highly polished blades to the runner

all of the above