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WorksheetsDay 58-Nov 20-worksheet-Dipolma-Hydroelectric projects&turbines
Total questions: 15
Worksheet time: 12mins
The function of a surge tank in a hydropower plant is mainly to reduce———-
(a)
Which of the following correctly distinguishes impulse and reaction turbines?
Impulse uses pressure energy
Reaction runs only at atmospheric pressure
Impulse converts all head to velocity before runner
Reaction turbines are never submerged
Overall efficiency of a hydropower scheme is —
Turbine efficiency × Generator efficiency
Hydraulic eff × Turbine eff × Generator eff
Gross head × Net head
Installed capacity × Capacity factor
A draft tube is mainly used to convert ———energy to ——-energy
(a)
Which turbine is used for large discharge and low head?
Pelton
Turgo
Kaplan
Crossflow
Capacity factor indicates —
Peak plant capacity
Ratio of actual to possible output
Minimum flow requirement
Daily plant load
A forebay is an enlarged water body located just before the intake structure.
True
False
A penstock carries water from the turbine back to the reservoir.
True
False
The ratio of net head to gross head is called ____________.
Hydraulic efficiency
Capacity factor
Installed capacity
Generator efficiency
Difference between headrace and tailrace is called (a) .
(a) turbines convert hydraulic energy into mechanical energy by velocity action.
Maximum power a plant can generate is called (a) .
Water from turbine is finally discharged into the (a) .
Arrange the following hydropower components in correct flow sequence
1-Turbine;2- Forebay; 3-Tail race; 4-Penstock.
(a)
Gross head = 120 m, Net head = 108 m. What is the hydraulic efficiency?
(a)
