Turbomachinery ...

In case of semicircular vanes, the theoretical maximum efficiency of wheel can be _____ %

A centrifugal pump delivers water against a not head of 14.5 m and speed 1000 rpm. Impeller diameter and outlet width is 300 mm and 50 m. If the manometric efficiency is 95%, the whirl velocity at outlet is:

A Francis turbine operates under a head of 50 m and 350 rpm. The vapour pressure is 0.35 m of water and atmospheric pressure is 1.03 kgf/cm². If the critical cavitation factor is 0.12, then the maximum possible height of runner above the water level to avoid cavitation is (in metre) ______

A test is conducted on two geometrically similar pumps running at the same speed of 2000 rpm. One has impeller diameter of 0.4 m and lifts water at rate of 20 liter/sec against head of 15 m. The head required by the other pump to deliver half the discharge is:-

Give the following data for a Pelton turbine: Power developed = 3000 kW, overall efficiency = 85%, Head = 300 m, Speed ratio = 0.44, C_V = 0.97, Specific speed = 14

A Kaplan turbine develops 25 MW power and operate under a head of 40 m. The speed ratio is 2 and flow ratio is 0.5. The diameter of boss is 0.35 times the diameter of runner and the overall efficiency is 88 % Calculate the speed of turbine (in rpm) ______