Day 36 Hydraulic machines -turbines

A draft tube is used with

• Impulse turbine

• Reaction turbine

• Centrifugal pump

• Reciprocal pump

Governor is used in turbines to

• Control the speed

• Increase the speed

• Improve efficiency

• Reduce the speed

In hydro power plant , the pipe carrying water from the reservoir to the turbine

• Suction Pipe

• Penstock

• Draft tube

• Turbine

Which of the following is an impulse turbine

• Francis turbine

• Kaplan turbine

• Pelton wheel

• Hydraulic ram

An inward flow reaction turbine

• Impulse turbine

• Francis turbine

• Pelton turbine

• All of the above

Kaplan turbine is a

• Impulse turbine

• Reaction turbine

• Reciprocating turbine

• None of the above

A Francis turbine is used when the available head of water is

• 60m to 250m

• 0 to 25m

• Above 250m

• None of these

Among the following which one is a low specific speed turbine

• Kaplan turbine

• Francis turbine

• Impulse turbine

• None of the above

Specific speed of a Kaplan turbine ranges between

• 30 to 60

• 300 to 1000

• 60 to 100

• 200 to 300

The ratio of shaft power imparted by the jet to the turbine is known as

• Mechanical efficiency

• Hydraulic efficiency

• Overall efficiency

• Volumetric efficiency