Wind Turbine Technologies: Master the Fundamentals of Wind Energy

Question 1

The yaw system in a wind turbine is primarily responsible for:

Accepted Answer

Controlling turbine direction

Answer

Adjusting blade pitch

Answer

Monitoring wind speed

Answer

Generating electricity

Question 2

Which of the following is NOT a recognized type of wind turbine based on its axis of rotation?

Accepted Answer

Inclined axis wind turbine

Answer

Vertical axis wind turbine (VAWT)

Answer

Horizontal axis wind turbine (HAWT)

Answer

Darrieus wind turbine

Question 3

What type of turbine is characterized by its vertical axis of rotation and is often utilized in urban and residential settings?

Accepted Answer

Savonius turbine

Answer

Darrieus turbine

Answer

Horizontal-axis turbine

Answer

Axial-flow turbine

Question 4

Which of the following is NOT an advantage of using composite materials in wind turbine blades?

Accepted Answer

Low cost

Answer

Lightweight construction

Answer

High strength-to-weight ratio

Answer

Corrosion resistance

Question 5

What is the term for the theoretical maximum efficiency of a wind turbine?

Accepted Answer

Betz limit

Answer

Cut-in speed

Answer

Power coefficient

Answer

Capacity factor

Question 6

What is the primary purpose of a wind farm controller?

Accepted Answer

Coordinate the operation of multiple wind turbines

Answer

Forecast wind patterns

Answer

Diagnose faults in wind turbines

Answer

Convert wind energy to electricity

Question 7

What is the primary purpose of the nacelle in a wind turbine?

Accepted Answer

Housing the generator and other electrical components

Answer

Controlling blade pitch and yaw

Answer

Transmitting power to the grid

Answer

Supporting the rotor

Question 8

Which type of wind turbine is typically used for large-scale offshore applications?

Accepted Answer

Horizontal axis wind turbine with a three-bladed rotor

Answer

Vertical axis wind turbine

Answer

Darrieus turbine

Answer

Savonius turbine

Question 9

What is the primary function of a gearbox in a wind turbine?

Accepted Answer

Increasing the rotational speed of the generator

Answer

Reducing the rotational speed of the rotor

Answer

Converting AC to DC

Answer

Transmitting power to the grid

Question 10

Which of the following factors does NOT significantly influence wind turbine performance?

Accepted Answer

Solar radiation

Answer

Wind speed

Answer

Blade length

Answer

Air density

Question 11

Which component is NOT essential for the operation of a wind turbine?

Accepted Answer

Engine

Answer

Rotor

Answer

Nacelle

Answer

Tower

Question 12

Which type of wind turbine has a vertical axis of rotation?

Accepted Answer

Vertical Axis Wind Turbine (VAWT)

Answer

Horizontal Axis Wind Turbine (HAWT)

Answer

Crosswind turbine

Answer

Darrieus turbine

Question 13

What is the primary function of a wind turbine gearbox?

Accepted Answer

Increase the rotational speed of the rotor

Answer

Convert AC current to DC current

Answer

Regulate the yaw angle of the nacelle

Answer

Stop the turbine in high winds

Question 14

What is the angle between the rotor plane and the wind direction commonly known as?

Accepted Answer

Yaw angle

Answer

Pitch angle

Answer

Skew angle

Answer

Angle of attack

Question 15

What is the primary challenge posed by the variable nature of wind power?

Accepted Answer

Grid instability and power fluctuations

Answer

High energy storage costs and economic viability

Answer

Reduced system reliability and safety concerns

Answer

Increased operating costs and maintenance expenses

Question 16

Which of the following is NOT a type of wind turbine rotor axis orientation?

Accepted Answer

Equatorial axis

Answer

Horizontal axis

Answer

Vertical axis

Answer

Oblique axis

Question 17

The Betz limit refers to:

Accepted Answer

The theoretical maximum efficiency of a wind turbine

Answer

The minimum wind speed required to generate electricity

Answer

The maximum blade diameter for a given wind turbine

Answer

The optimal pitch angle for a wind turbine blade

Question 18

The process of converting the mechanical energy of a wind turbine's rotor into electrical energy is known as:

Accepted Answer

Generation

Answer

Induction

Answer

Commutation

Answer

Transmission

Question 19

Which of the following is NOT a primary component of a horizontal-axis wind turbine?

Accepted Answer

Tail rotor

Answer

Rotor

Answer

Nacelle

Answer

Tower

Question 20

What type of generator is commonly used in wind turbines to convert mechanical energy into electrical energy?

Accepted Answer

Asynchronous generator (induction generator)

Answer

Synchronous generator

Answer

DC generator

Answer

Eddy current generator

Question 21

What type of control system is employed to maintain the optimal operating speed of a variable-speed wind turbine?

Accepted Answer

Pitch control

Answer

Stall control

Answer

Active stall control

Answer

Yaw control

Question 22

What is the purpose of a yaw system in a wind turbine?

Accepted Answer

To align the rotor with the wind direction

Answer

To control the blade pitch angle

Answer

To regulate the generator output voltage

Answer

To monitor the turbine's health status

Question 23

What is the primary function of an anemometer in a wind turbine system?

Accepted Answer

To measure wind speed and direction

Answer

To generate electricity

Answer

To control the turbine's pitch angle

Answer

To monitor the turbine's vibrations

Question 24

What is the name of the aerodynamic force that causes a wind turbine to rotate?

Accepted Answer

Lift

Answer

Drag

Answer

Thrust

Answer

Bernoulli's principle

Question 25

What is the primary function of the nacelle in a wind turbine?

Accepted Answer

Houses the generator and other equipment

Answer

Converts mechanical energy into electrical energy

Answer

Orients the turbine to face the wind

Answer

Controls the pitch of the rotor blades

Question 26

Which type of wind turbine is most commonly used in onshore applications?

Accepted Answer

Horizontal axis wind turbine

Answer

Vertical axis wind turbine

Answer

Darrieus wind turbine

Answer

Savonius wind turbine

Question 27

What is the most significant factor that influences the efficiency of a wind turbine?

Accepted Answer

Wind speed

Answer

Rotor diameter

Answer

Air density

Answer

Generator efficiency

Question 28

What is the purpose of a yaw control system in a wind turbine?

Accepted Answer

Orient the turbine to face the wind

Answer

Regulate the speed of the rotor blades

Answer

Maximize power output

Answer

Reduce noise emissions

Question 29

What is the theoretical maximum efficiency that a wind turbine can achieve?

Accepted Answer

59.3%

Answer

75%

Answer

90%

Answer

100%

Question 30

Which of the following is a method used to predict the power output of a wind turbine?

Accepted Answer

Power curve analysis

Answer

Load testing

Answer

Acoustic monitoring

Answer

Vibration analysis

Question 31

Which component of a wind turbine is responsible for housing the generator?

Accepted Answer

Nacelle

Answer

Rotor

Answer

Tower

Answer

Engine

Question 32

What type of wind turbine rotates around a vertical axis?

Accepted Answer

Vertical axis wind turbine

Answer

Horizontal axis wind turbine

Answer

Propeller wind turbine

Answer

Savonius wind turbine

Question 33

What is the primary function of the nacelle in a wind turbine?

Accepted Answer

To house the generator and other electrical components

Answer

To support the rotor

Answer

To rotate the turbine

Answer

To convert wind energy into electricity

Question 34

What is the key difference between fixed-speed and variable-speed wind turbines?

Accepted Answer

Fixed-speed turbines operate at a constant speed, while variable-speed turbines adjust their speed to match wind conditions.

Answer

Variable-speed turbines operate at a constant speed, while fixed-speed turbines adjust their speed to match wind conditions.

Answer

Fixed-speed turbines are more efficient than variable-speed turbines.

Answer

Variable-speed turbines are less reliable than fixed-speed turbines.

Question 35

Which among the provided options is not a type of wind turbine?

Accepted Answer

Centripetal wind turbine

Answer

Horizontal-axis wind turbine (HAWT)

Answer

Vertical-axis wind turbine (VAWT)

Answer

Darrieus wind turbine

Question 36

What is the primary function of a wind turbine's nacelle?

Accepted Answer

To house the generator and other electrical components

Answer

To provide structural support for the rotor

Answer

To convert kinetic energy into electrical energy

Answer

To regulate the turbine's speed

Question 37

What is the purpose of utilizing a yaw system in a wind turbine?

Accepted Answer

To align the rotor with the direction of the wind

Answer

To prevent excessive speed

Answer

To regulate power output

Answer

To provide stability during strong winds

Question 38

What is the primary advantage of VAWTs over HAWTs?

Accepted Answer

Both (b) and (c)

Answer

Reduced noise emissions

Answer

Lower visual impact

Answer

Higher efficiency at low wind speeds

Question 39

What type of wind turbine design is primarily used for commercial electricity generation?

Accepted Answer

Horizontal-axis wind turbine (HAWT)

Answer

Vertical-axis wind turbine (VAWT)

Answer

Fixed-blade turbine

Answer

Variable-speed turbine

Question 40

What is the primary function of a wind turbine's nacelle?

Accepted Answer

To house the electrical components and gearbox

Answer

To support and rotate the blades

Answer

To transmit power to the grid

Answer

To control the turbine's direction

Question 41

What is the technical term for the angle between the direction of the wind and the axis of rotation of a HAWT?

Accepted Answer

Yaw angle

Answer

Pitch angle

Answer

Tip speed ratio

Answer

Power coefficient

Question 42

Which factor does NOT influence the power output of a wind turbine?

Accepted Answer

Solar irradiance

Answer

Wind velocity

Answer

Air density

Answer

Blade size and shape

Question 43

The international agreement establishing binding targets for reducing greenhouse gas emissions is known as:

Accepted Answer

Paris Agreement

Answer

Kyoto Protocol

Answer

Montreal Protocol

Answer

Convention on Biological Diversity