ASSESSMENT ENERGY EFFICIENCY (HYDRO)

1. The power output from a hydro-electric power plant depends on three parameters........

• Head, type and dam of discharge
• Head, discharge and efficiency of the system
• Efficiency of the system, type of draft tube and type of turbine used
• Type of dam, discharge and type of catchment area

2. _______________ is the speed of geometrically similar turbine which would produce unit power (1kW) under unit head (1m).

• Relative speed
• Specific speed
• Absolute speed
• Turbine speed

3. Francis and Kaplan turbine is used for _______ heads hydro-electric plant.

• Medium and low head
• High head
• Low head
• Low and high head

4. What is 'live storage’?

• Storage capacity below the lowest level of reservoir, which is not susceptible to release by usual outlet means
• Storage capacity below Min Operating Level(MOL)
• Storage capacity between Min Operating Level(MOL) and Full Supply Level(FSL)
• Storage for flood control

5. Which one does NOT affect turbine efficiency losses?

• Cooling system inefficient
• Guide vane seal leakage
• Wicket gate/guide vane/nozzle misalignment
• Runner cavitation

6. Two types/category of hydro turbines:

i) Pelton

ii) Impulse

iii) Vertical Francis

iv) Reaction

• i & ii

• i & iii

• ii & iii

• ii & iv

8. Trashrack losses due to :

i) Trash accumulation

ii) Flow blockage infront

iii) Frame deformation

iv) Rusty

• i,ii & iii

• i,iii & iv

• ii,iii & iv

• All of the above

9. Francis, Kaplan and Propeller turbines fall under the category of __________.

• Impulse turbine
• Reaction turbine
• Impulse reaction combined
• Axial flow

What is the component used to regulate the excess water / inflows at the dam?

• Saddle dam

• Penstock

• Spillway / flood gate

• Log boom

What are the factors that will effected the operational regime of the hydropower?

i.Weather

ii.System frequency

iii.Gas supply / curtailment

iv.Peak demand

• i & ii

• ii, iii, & iv

• iii & iv

• All of the above