g 1. The theory used to determine the maximum power of a wind turbine is (A) actuator theory, (B) Fourier theory, (C) Maxwell theory. 2. The maximum power that can be extracted by a wind turbine is (A) 0.2963, (B) 0.593, or (C) 0.5 of the available wind power. 3. The two types of HAWT are (A) , (B),and VAWT are (C) , and (D). 4. The tower shadow is one of major concern of (A) upwind turbine, (B) downwind turbine or (C) vertical wind turbine. 5. The advantages of VAWT are (A) does not need to turn toward the wind (B) all powertrain components in the ground level, and (C) very stable. 6. The self-starting VAWT is (A) Darrieus wind turbine (B) Savonius wind turbine or (C) straight blade wind turbine. 7. Smaller number of blade will require (A) higher starting speed, (B) lower starting speed, (C) can self-starting. 8. Since air flow is not confined, the interference factors are used to compensate the air flow through the blade and there are (A) and (B) 9. For a self-starting Savonius vertical wind turbine, it has relative (A) high torque or (B) low torque at low wind speed. 10. The overall power generated by a wind turbine can be determined by the linear average wind speed during the period which is (A) True, or (B) False.