Give an example where structural drag may benefit a wind turbine.
What will be an ideal response?
Structural drag plays an important role in the primary braking function of pitch able blade tips and full span blade pitching. The increase in surface area exposed to the air stream when full span blades are pitched may be a factor of 10.
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The soil water content after drainage of gravitational water is called _________________________
Fill in the blank(s) with correct word
The maximum torque obtainable from a DC motor is limited by commutation rather than by ____.
a. speed b. rotation c. heating d. flux
Basic materials will typically account for approximately _____ percent of the project cost.
A. 20 B. 35 C. 50 D. 65
Which statement about on-demand tests is NOT true?
A. On demand tests can be made with the key on and the engine not running B. On demand tests can be made with the engine running C. Functional tests are performed during the KOER self-test D. Functional tests are performed during the KOEO self-test