21. What is the function of a powerhouse in a hydroelectric power plant?
a. To store water
b. To regulate the flow of water
c. To generate electricity
d. To release water
22. Which of the following is a type of high-head impoundment hydroelectric power plant?
a. Conventional
b. Run-of-river
c. Pumped storage
d. Tidal
23. What is the function of a fish ladder in a hydroelectric power plant?
a. To regulate the flow of water
b. To store water
c. To release water
d. To allow fish to swim upstream
24. Which of the following is not a factor affecting the efficiency of a hydroelectric power plant?
a. Head
b. Flow rate
c. Generator voltage
d. Turbine type
25. What is the function of a forebay in a hydroelectric power plant?
a. To store water
b. To regulate the flow of water
c. To protect the turbine from debris
d. To release water
