Solar and Wind Power Generation — MCQs – EE

1. The main source of energy in solar power generation is
(A) Coal
(B) Sunlight
(C) Wind
(D) Water

2. A solar cell directly converts
(A) Heat energy into electrical energy
(B) Solar radiation into electrical energy
(C) Kinetic energy into electrical energy
(D) Mechanical energy into electrical energy

3. The efficiency of a typical silicon solar cell is around
(A) 5–10%
(B) 15–20%
(C) 25–30%
(D) 40–50%

4. The energy from solar radiation can be utilized in
(A) Photovoltaic cells
(B) Solar thermal systems
(C) Both (A) and (B)
(D) Wind turbines

5. The maximum power point of a solar panel is
(A) The point at which voltage is maximum
(B) The point at which current is maximum
(C) The point at which product of voltage and current is maximum
(D) None of these

6. The inverter in a solar PV system is used to
(A) Store electricity
(B) Convert DC into AC
(C) Increase voltage
(D) Convert AC into DC

7. A solar tracker is used to
(A) Increase sunlight absorption
(B) Store solar energy
(C) Convert DC to AC
(D) Cool the solar panels

8. The main disadvantage of solar power is
(A) Pollution
(B) Intermittency and dependency on sunlight
(C) High operating cost
(D) Long construction time

9. Wind energy is generated due to
(A) Pressure differences in the atmosphere
(B) Temperature differences
(C) Both (A) and (B)
(D) Solar panels

10. The prime mover in a wind power plant is
(A) Gas turbine
(B) Wind turbine
(C) Steam turbine
(D) Diesel engine

11. The type of wind turbine used in most modern wind farms is
(A) Horizontal axis wind turbine (HAWT)
(B) Vertical axis wind turbine (VAWT)
(C) Both
(D) None

12. The tip speed ratio in a wind turbine is the ratio of
(A) Rotor speed to wind speed
(B) Blade tip speed to wind speed
(C) Wind speed to blade tip speed
(D) Rotor diameter to wind speed

13. The efficiency of a wind turbine is limited by
(A) Betz limit
(B) Carnot limit
(C) Newton’s laws
(D) Ohm’s law

14. The main advantage of wind power plants is
(A) Low pollution
(B) High reliability
(C) High operating cost
(D) Fuel dependency

15. The power output of a wind turbine is proportional to
(A) Cube of wind speed
(B) Square of wind speed
(C) Wind speed
(D) Fourth power of wind speed

16. Wind turbines convert
(A) Kinetic energy of wind into electrical energy
(B) Potential energy into electrical energy
(C) Heat energy into mechanical energy
(D) Solar energy into electricity

17. The cut-in speed of a wind turbine is
(A) The speed at which it starts generating power
(B) The speed at which it shuts down
(C) The maximum speed it can handle
(D) None of these

18. The cut-out speed of a wind turbine is
(A) The speed at which power output is maximum
(B) The speed at which turbine shuts down to prevent damage
(C) The speed at which turbine starts
(D) None of these

19. A hybrid solar-wind system is used to
(A) Reduce intermittency
(B) Increase efficiency
(C) Provide more reliable power
(D) All of the above

20. Solar photovoltaic cells are made of
(A) Silicon
(B) Aluminum
(C) Copper
(D) Iron

21. The rotor in a wind turbine is connected to
(A) Generator
(B) Inverter
(C) Battery
(D) Transformer

22. The energy from the wind is extracted using
(A) Blades
(B) Shaft
(C) Nacelle
(D) Tower

23. The main limitation of wind power is
(A) High fuel cost
(B) Intermittency and site dependency
(C) Pollution
(D) High operating cost

24. Maximum power output of a solar PV system occurs at
(A) Maximum voltage
(B) Maximum current
(C) Maximum voltage × current
(D) None of these

25. Wind power density depends on
(A) Air density
(B) Wind speed
(C) Both (A) and (B)
(D) None of these

26. A solar panel’s performance is affected by
(A) Temperature
(B) Dust and dirt
(C) Shading
(D) All of the above

27. The nacelle of a wind turbine houses
(A) Blades
(B) Generator, gearbox, and control system
(C) Tower
(D) Foundation

28. The rated capacity of a wind turbine is
(A) Maximum wind speed
(B) Output at rated wind speed
(C) Cut-in speed
(D) None of these

29. Solar thermal power plants use
(A) Photovoltaic effect
(B) Heat to generate steam and drive a turbine
(C) Wind energy
(D) Hydropower

30. The combination of solar and wind energy is best suited for
(A) Grid-connected systems
(B) Off-grid systems
(C) Both (A) and (B)
(D) Diesel-only systems