[L6]_WIND TURBINE COMPONENTS Flashcards
ENGY-688
(True/False): The tip speed of wind turbine blades can be up to six times the speed of the wind itself.
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True
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ENGY-688
Which historical event significantly revitalized interest in wind energy production?
A. The Great Depression
B. The OPEC oil crisis
C. World War II
D. The Cold War
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B. The OPEC oil crisis
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ENGY-688
Match the WTG components with their primary functions:
A. Rotor system
B. Nacelle
C. Tower
- Houses the mechanical drive-train and control systems.
- Supports the turbine and captures wind energy.
- Transfers structural loads to the ground.
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A: 2
B: 1
C: 3
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ENGY-688
(True/False): The pitch system controls rotor speed by adjusting the angle of the blades.
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True
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ENGY-688
What material is NOT commonly used for wind turbine blades?
A. Aluminum
B. Fiberglass
C. Carbon-fiber composites
D. Steel
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D. Steel
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ENGY-688
(True/False): A three-blade rotor design is standard because it minimizes noise and bird collisions while maintaining aerodynamic efficiency.
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True
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ENGY-688
(True/False): The nacelle houses the gear box, low- and high-speed shafts, generator, and control systems.
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True
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ENGY-688
Which feature is unique to some large nacelles?
A. Helicopter landing capability
B. Advanced cooling systems
C. Built-in storage tanks
D. Solar panels for auxiliary power
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A. Helicopter landing capability
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ENGY-688
Match the gear designs to their gear ratios:
A. Spur gears
B. Planetary gears
1:5
2:12
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A: 1
B: 2
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ENGY-688
(True/False): Direct-drive wind turbines eliminate the need for gearboxes, making them more efficient at lower rotational speeds.
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True
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ENGY-688
(True/False): Yaw control systems use electric motors to ensure the rotor faces the wind as wind direction changes.
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True
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ENGY-688
What activates the yaw mechanism in a wind turbine?
A. Hydraulic pumps
B. Wind vane signals to the electronic controller
C. Manual adjustments by operators
D. External wind conditions
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B. Wind vane signals to the electronic controller
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ENGY-688
(True/False): Doubly-fed induction generators (DFIGs) are the most common generator type for modern wind turbines.
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True
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ENGY-688
Which generator type provides variable speed control and eliminates power spikes caused by wind gusts?
A. Type 1: Conventional induction generator
B. Type 2: Wound-rotor induction generator
C. Type 3: Doubly-fed induction generator
D. Type 4: Full-converter interface
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C. Type 3: Doubly-fed induction generator
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ENGY-688
Match the tower types with their benefits:
A. Tubular steel towers
B. Lattice truss towers
- Lower initial cost due to less steel.
- Shorter assembly time with less resistance to wind flow.
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A: 2
B: 1
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