PIPE Hydroelectric Power Plant Pt.1

In turbine installation, the air is removed from the condenser by ____.

• air pump

• air ejector

• air injector

• air jet

The primary purpose of a turbine in a fluid loop is to:

• add energy to the flow

• add mass to the flow

• extract energy from the flow

• none of these

*What is the type of turbine that has specific speed below 5?

• Impulse turbine

• Francis turbine

• Propeller turbine

• Deriaz turbine

*Which of following is a high discharge type of turbine?

• Impulse turbine

• Propeller turbine

• Francis turbine

• Deriaz turbine

*Which of the following is used to minimize the speed rise due to a sudden load rejection

• needle valve

• wicket gate

• Shut-off valve

• jet deflector

A vena contracta in a fluid jet issuing through a hole in a plate is located approximately :

• 10 diameters downstream of the hole

• at jet's minimum diameter

• at the orifice minimum diameter

• at the orifice maximum diameter

*It is the speed of a turbine when the head on the turbine is one meter.

• Specific speed

• Utilized speed

• Rated speed

• Unit speed

*Which of the following turbines has a diagonal flow?

• Impulse turbine

• Propeller turbine

• Francis turbine

• Deriaz turbine

In the absense of any heat and work interactions and any chances in potential energy, the stagnation enthalpy of a fluid remains constant during ____.

• unsteady flow

• turbulent flow

• steady flow

• variable flow

The coefficient of contraction is the ratio of the ____.

• area of vena contracta to the orifice area

• actual discharge to the theoretical discharge

• actual velocity to the theoretical velocity

• effective head to the actual head