Answer Happy

With respect to a horizontal axis wind turbine, which of the following statements are true? Select one or more: The yaw mechanism is the primary way of setting the angle of attack of the blades. The pitch mechanism is need to point the turbine into the wind. The yaw mechanism is need to point the turbine into the wind. The yaw mechanism is useful to reduce the power output in strong wind conditions. The pitch mechanism is useful to reduce the power output in strong wind conditions. The pitch mechanism is the primary way of setting the angle of attack of the blades.
In designing a horizontal axis wind turbine, which of the following factors would lead to a preference for fewer numbers of blades? Select one or more: Lower turbulence produced by the blades. Lower cost. Lower variations in moment of inertia about the vertical axis. Higher efficiency.