11. What is the function of a draft tube in a hydroelectric power plant?
a. To regulate the flow of water
b. To store water
c. To increase the efficiency of the turbine
d. To release water
12. What is the maximum efficiency of a hydroelectric power plant?
a. 50%
b. 80%
c. 90%
d. 100%
13. Which of the following is a type of run-of-river hydroelectric power plant?
a. Conventional
b. Impoundment
c. Pumped storage
d. Tidal
14. What is the function of a spillway in a hydroelectric power plant?
a. To store water
b. To release water
c. To regulate the flow of water
d. To generate electricity
15. What is the function of a transformer in a hydroelectric power plant?
a. To control the flow of water
b. To regulate the speed of the turbine
c. To generate electricity
d. To step up or step down the voltage
