Wind Energy Question & AnswersSeptember 1, 2021 By Wat Electrical Leave a Comment This article lists 100 Wind Energy MCQs for Engineering Students. All the Wind Energy Questions & Answers given below includes solution and link wherever possible to the relevant topic.The wind is a dynamic motion of air in all directions or in a specific direction within a specific environment. The reason behind the motion of air is due to two main reasons that include imbalance heating of earth due to solar energy and rotation of the earth. This flow of wind can be used to generate electric power using windmills. A windmill turbine is a tower installed at windmill farms constructed with components like rotors, fans also called blades, and batteries. The height of the tower depends on the physical location of installation. The electrical energy generated from the windmill is by converting input mechanical energy into electrical energy. This happens only when the wind hits the rotator blades and converts them into electrical energy.The quantity of electrical energy generated by wind turbines depends on the temperature, velocity, and humidity parameters of the environment. The applications of wind energy generation are grinding grain, pumping water, and generating power. The advantage of using wind energy is it is cost-effective, a natural power generation source, a renewable source, etc.1). Which of the following is the energy used for storing Wind energy? Kinetic Potential Chemical Electrical HintA kinetic energy is used for storing Wind energy.2). Which of the following are renewable energies? Wind Water Wood All the above HintWind, water, and wood are renewable type of energies for generating electricity.3). Which of the following are the main components used during generation of wind type energy? Fan Wind Batteries All the above HintThe components while generating wind energy are rotors, fans, wind, and batteries.4). Which of the following are the events that allows in generation of electricity? Solar heat Earth surface Moving of earth All the above HintThe events that allow in the generation of electricity are solar energy, earth surface, and moving of earth.5). Which of the following is the purpose of wind energy generation? Grinding grain Pumping water Generating power All the above HintThe purpose of wind energy generation is grinding grain, pumping water, and generating power.6). Wind turbines are of ____ types. 2 3 4 5 HintWind turbines are of 2 types namely vertical and horizontal type axis turbines.7). How many blades do horizontal wind type turbines have? 2 3 4 5 HintA horizontal wind type turbines have 3 blades.8). The power generated by an horizontal type wind turbines for basic applications is _______. Less than 100kW 100 kW 1000 kW Greater than 100kW HintThe power generated by horizontal type wind turbines for basic applications is below 100-kilo watts of power.9). The power generated by an horizontal type wind turbines for offshore is ________. 6MW 6W 50MW 10W HintThe power generated by horizontal type wind turbines for offshore is 6MW.10). Which of the following are the basic components of a horizontal type wind turbines? Gear box Controller Accelerometer All the above HintThe basic components of a horizontal type wind turbine are gear box, controllers, accelerometer, generator, blades, yaw drive, nacelle, and wind vane.11). Which of the following component is connected to gear box in horizontal type wind turbine? Low speed shaft High speed shaft Controllers Accelerometer HintA low type speed shaft is connected to the gearbox in a horizontal type wind turbine.12). Which of the following is the function of a low speed type shaft in wind turbine? Speed of shaft is increased Speed of shaft is minimized Speed of shaft is maintained moderate Speed of shaft is maintained at zero HintThe function of a low-speed type shaft in a wind turbine is the speed of the shaft is increased.13). What is the speed of shaft when low speed type shaft is interfaced with gear box at 60Hz frequency? 1800 rpm 1100 rpm 1000 rpm 10000 rpm HintThe speed of the shaft when a low-speed type shaft is interfaced with the gearbox is 1800 rpm at 60Hz frequency.14). What is the speed of shaft when low speed type shaft is interfaced with gear box at 50Hz frequency? 1800 rpm 1500 rpm 1000 rpm 10000 rpm HintThe speed of shaft when low-speed type shaft is interfaced with the gearbox at 50Hz frequency is 1500 rpm.15). Which of the following component is connected to generator box in horizontal type wind turbine? Low speed shaft High speed shaft Controllers Accelerometer HintA high type speed shaft component is connected to the generator box in a horizontal type wind turbine.16). A high speed type shaft in horizontal wind mill translates ________ to AC type voltage. Rotatory motion Swing motion Linear motion None of the above HintA high-speed type shaft in a horizontal wind turbine translates rotatory type motion to AC type voltage.17). What happens to speed when in high speed type shaft of horizontal wind turbine? Zero Critical Infinity 1 HintThe speed becomes critical when in a high-speed type shaft of the horizontal wind turbine as the generator is operated directly.18). Which of the following component does not exist in direct driven type horizontal wind turbine? Gear box Blades Controllers Anemometer HintA gearbox component does not exist in direct driven type horizontal wind turbine.19). Which of the following is the major component of a commercial type wind turbines? Computer PLC’s Shafts Both a and b HintThe major component of commercial-type wind turbines is computers and PLC’s. Read more about PLC.20). In how many ways a horizontal type wind turbines can control output based frequency? 2 3 4 5 HintIn 3 ways a horizontal type wind turbine can control output-based frequency.21). Which of the following are the three ways to control speed of wind turbines? Adjusting yaw and pitch Allowing turbine to run at any speed bounded with ratings Controlling of generators frequency output for double feed All the above HintThe three ways to control the speed of wind turbines are adjusting yaw and pitch, allowing the turbine to run at any speed bounded with ratings, and controlling of generators frequency output for double feed.22). Which of the following is the function of HAWTs in gearbox of horizontal wind turbine? Speeds up the rotation of blades Slows down the rotation of blades Maintains speed of blades None of the above HintThe function of HAWTs in the gearbox of the horizontal wind turbine is to speed up the rotation of blades.23). What is the optimum speed of operation of blade when yaw and pitch are adjusted for controlling the turbine speed? 10 to 20 rpm 22 rpm 5rpm 6rpm HintThe optimum speed of operation of the blade when yaw and pitch are adjusted for controlling the turbine speed is 10 to 20 rpm.24). A controller in commercial type wind turbines are provided with data from ________. Anemometer Yaw drive Rotor Wind vane HintA controller in commercial-type wind turbines is provided with data from the anemometer. Read more about Anemometer.25). Which of the following phases are used in vertical type wind turbine? Single Two Three Both a and c HintA single or 3 phase are used in vertical type wind turbine.Wind Energy MCQs for Interviews26). Which of the following is used for filtering out input frequency and converting in to DC in vertical type wind turbine? Rectifier Passive filter Active filter Both a and b HintA passive filter and rectifiers are used for filtering out input frequency and converting it to DC in a vertical type wind turbine. Read more about Rectifier.27). Which of the following are components of power electronic type frequency converter used in vertical type wind turbines? Rectifier Inverter Transformer All the above HintThe components of power electronic type frequency converter used in vertical type wind turbines are rectifiers, inverters, transformers, capacitor, and inductor filter. Read more about Inverter.28). Which of the following is an input to power electronic type frequency converter used in vertical type wind turbines? Variable AC type frequency from wind turbines Zero ripple waves from wind Constant Ac type frequency from wind turbines Variable DC type frequency from wind turbines HintVariable Ac type frequency from wind turbines is input to power electronic type frequency converter used in vertical type wind turbines.29). What is the height of HAWT tower? 40 to 100 meters 50 meters 110 meters 30 meters HintThe height of HAWT tower is 40 to 100 meters.30). Which of the following component is used in controller of vertical type wind turbine? Meter Motor Sensor All the above HintA sensor is used in the controller of a vertical type wind turbine for tracking frequency and voltage values from generators output. Read more about Sensor.31). Which of the following are the components of horizontal type wind turbine? Break Gears AC generators All the above HintA horizontal type wind turbine consists of breaks, gears, AC generators, AC to DC converters, wind sensor, and 3phase inverter. Read more about AC Generators.32). How many number of blades allow wind turbine to operate at higher speed? More Lesser Zero Single HintLesser the number of blades allows the wind turbine to operate at a higher speed.33). Which of the following are advantage of single type blade turbines? Less weight Operates at higher speed Occupies less area All the above HintThe advantage of single-type blade turbines are less weight, occupy less area compared to other bladed turbines, and operate at higher speed.34). Which of the following are disadvantages of single type blade turbines? Wear and fatigue High cost to maintain High set up procedure required All the above HintThe disadvantage of single-type blade turbines are wear and fatigue, high cost to maintain and high setup procedure required.35). Which of the following are the disadvantages of two bladed wind type turbine? Noisy Failure in operation High maintenance All the above HintThe disadvantage of a two-bladed wind type turbine is noisy, failure in operation, and high maintenance is required.36). Which of the following are advantages of two blade type turbine? Less weight Generates maximum energy Less vibration All the above HintThe advantage of a two-blade type turbine is less weight, generates maximum energy, and less vibration.37). Which of the following are the advantages of three blade turbine? Does not makes sounds much during operation Less vibration Lowest cost of energy All the above HintThe advantage of the three-blade turbine does is it not make a sound much during operation, fewer vibrations are observed, and lowest cost of energy.38). Which of the following are the disadvantages of three blade type turbine? Higher in weight Expensive Employs yaw control All the above HintThe disadvantage of a three-blade type turbine is higher in weight compared to other bladed turbines, expensive and employs yaw control.39). What is the formula for total energy of wind flowing from imaginary based surface of area “A”? E = 1/2mv(3) E = 1/2mv E = 1/2m E=mv HintThe formula for the total energy of wind flowing from imaginary-based surface of area “A”?E = 1/2mv(3).40). What is the formula for power used for wind turbine? P=E/t P=0 P = E P= E/m HintThe formula for power used for a wind turbines is P=E/t.41). Which of the following are the applications of energy loss type factors for wind turbines? Electrical type losses High wind speed based shutdown Wake loss All the above HintThe applications of energy loss type factors for wind turbines are electrical type losses, high wind speed based shutdown, and wake loss.42). Which of the following are the software used for assessing Wind type resources? Wind based data management Wind data type analysis Atmospheric based simulation modeling All the above HintThe software used for assessing wind type resources is wind-based data management, wind data type analysis and atmospheric based simulation modeling.43). Which of the following software assist user to gather, analyze, retrieve and store winds data? Wind based data management Wind data type analysis Wind farm modeling Atmospheric based simulation modeling HintWind based data type software management assist user to gather, analyze, retrieve and store winds data.44). Which of the following software assist user to filter measurement based errors from accumulated winds data and allow them to do stats based analysis? Wind based data management Wind data type analysis Atmospheric based simulation modeling Wind farm modeling HintWind data type analysis software assists the user to filter measurement-based errors from accumulated winds data and allows them to do stats-based analysis.45). Which of the following software predicts unavailable characteristics of wind resources at a particular location? Wind based data management Wind data type analysis Atmospheric based simulation modeling Wind flow modeling HintWind flow modeling type software predicts unavailable characteristics of wind resources at a particular location.46). Which of the following software calculates high resolution based maps during wind energy flow? Wind based data management Wind data type analysis Atmospheric based simulation modeling Wind flow modeling HintAtmospheric-based simulation modeling software calculates high-resolution based maps during wind energy flow.47). Which of the following country have “Jaisalmer based Wind Park”? India China US Romania HintIndia has 2 wind parks namely “Jaisalmer based Wind Park” and “Muppandal” wind park.48). What is the energy capacity generated from Muppandal wind farm of India? 1500 MW 1064 MW 850 MW 736 MW HintThe energy capacity generated from the Muppandal wind farm of India is 1500MW.49). What is the energy capacity generated from Jaisalmer wind farm of India? 1500 MW 1064 MW 850 MW 736 MW HintThe energy capacity generated from the Jaisalmer wind farm of India is 1064 MW.50). Which of the following country stands high in generation of wind power? China India US Romania HintChina has a Gansu wind base farm that generates 7965 MW from wind power station park.Wind Energy Exam Questions & Answers51). Which of the following is the advantage of wind energy? No carbon dioxide emission Eco-friendly More power generation All the above HintThe advantage of wind energy is noncarbon dioxide emission, eco-friendly and more power generation.52). What is the percentage efficiency of aero based turbine mill (horizontal type windmill)? 35 45 30 50 HintAbout 35 % is the efficiency of an aero-based turbine mill (horizontal type windmill).53). What is the percentage efficiency of aero based farm mill (horizontal type windmill)? 35 15 30 50 HintAbout 15 percent is the efficiency of an aero-based farm mill (horizontal type windmill).54). What is the efficiency of Giromill type wind mill? 35% 40% 30% 25% HintThe efficiency of Giromill type wind mill is 35%.55). Which of the following is the advantage of vertical type windmill? Low cost Light weight High efficiency All the above HintThe advantage of vertical-type windmills is low cost, light weight, and high efficiency.56). What is the efficiency percentage of cyclo based gyro type windmill? 60% 30% 40% 50% HintThe efficiency percentage of a cyclo-based gyro-type windmill is 60%.57). Which of the following component of wind mill collects wind based energy? Generator Hub Rotor Blades HintThe rotor component of the wind mill collects wind-based energy.58). What are other materials present in rotor component of standard windmill? Wood Fiber glass Metal blades All the above HintThe materials present in the rotor components of the standard windmill are wood, fiber glass, and metal blades.59). In which of the following windmill operation design blades are pushed outwards by wind force? Drag design Lift design Both a and b None of the above HintIn drag and lift design windmill operation design blades are pushed outwards by wind force.60). Which of the following defined is as speed of rotation of blade and speed of wind? Tip based speed ratio Generator speed Transmission ratio None of the above HintTip based speed ratio is defined as speed of rotation of blade and speed of wind.61). What happens to speed of wind type turbine if there is increase in tip based speed ratio is large? Fastens Slows down Comes to rest None of the above HintThe speed of a wind-type turbine fastens if there is an increase in tip-based speed ratio is large.62). What is the tip based speed ratio of lift based wind turbine? 10 20 30 100 HintThe tip based speed ratio of the lift-based wind turbine is 10rpm.63). Which of the following factors effect the performance of wind based turbine? Blades number Area occupied Speed Both a and b HintBlades number and area occupied are the factors that effect the performance of the wind-based turbines.64). What should be the arrangement of gap between blades for avoiding turbulence in wind type turbine? Large Less No space Depends on the power to be generated HintThe arrangement of the gap between blades for avoiding turbulence in a wind-type turbines should be large.65). Which of the following component of wind mill transduces rotatory blades wind based energy into electric power? Generator Rotor Blades Gears HintA generator of wind mill transduces rotatory blades wind-based energy into electric power.66). What is the AC voltage used for domestic appliances? 240V/50 cycles 210V/50 cycles 200V/50 cycles 120V/50 cycles Hint240V/50 cycles is the AC voltage used for domestic appliances.67). Which of the following are the functions of DC generator in windmill? Charge appliances Generate AC current using inverter Converting DC to AC All the above Hintthe functions of a DC generator in a windmill are charges appliances, generate AC current using an inverter, and convert AC to DC.68). What is the range of transmission rate of windmill’s rotors component? 40-400rpm 10-250rpm 50-100rpm 0-40rpm Hint40-400rpm is the range of transmission rate of the windmill’s rotors component.69). What is the range of transmission rate of generators in windmill? 1200 to 1800 rpm 1000-1200 rpm 100-1000 rpm 100-500 rpm Hint120-1800 rpm is the transmission rate of generators in windmills. Read more about Generator.70). What happens to the speed of wind mill on adding gearbox? Increases Decreases Constant Zero HintOn adding gearbox to windmill its speed increases and works efficiently.71). In direct based drive system the rotor of windmill has direct interface with _______ component. Generator Blade Motor All the above HintIn a directly based drive system, the rotor of the windmill has a direct interface with the generator.72). Which of the following are the characteristics of wind tower? Support wind based turbines Handles vibrations occurred Weather resistance All the above HintThe characteristics of wind towers are supports wind-based turbines, handles vibration occurred and weather resistance.73). Which of the following windmill characteristic’s is defined as minimum speed of wind required for blades to rotate and produce quantity of power for use? Cut in speed Rated speed Cut out speed Betz limit HintCut in speed is defined as the minimum speed of wind required for blades to rotate and produce a quantity of power for use.74). Which of the following windmill characteristic’s is defined as minimum speed where turbine produces required power rate? Cut in speed Rated speed Cut out speed Betz limit HintThe Rated speed of windmill characteristics is defined as the minimum speed where the turbine produces the required rated power.75). What is the rated speed required for a 10 KWatts wind turbine to produce 10KWatts power? 40kmph 30kmph 35kmph 38kmph Hintthe rated speed required for a 10 KWatts wind turbine to produce 10KWatts power is 40kmph.Wind Energy MCQs With Answers76). What is the standard reference rated speed of windmill machines? 40 – 55 kmph 10 – 20 kmph 30 – 40 kmph 40 kmph HintThe standard reference rated speed of windmill machines is 40-55kmph.77). What happens to speed of wind between cut in speed and rated speed? Increases Decreases Infinity Zero HintThe speed of wind between cut-in speed and rated speed increases with an increase in the wind flow.78). What happens to turbines if they operate at higher speed of 128kmph? Rotates even more Rotates slow Shuts off Rotates at constant rate HintThe turbines if they operate at a higher speed of 128kmph shuts off.79). Which of the following is defined as speed at which windmill stops functioning? Cut out speed Betz limit Rated speed Cut in speed HintCut-out speed is defined as the speed at which the windmill stops functioning.80). Which of the following is the primary safest characteristics of a wind turbine? Cut out speed Betz limit Rated speed Cut in speed HintA cut-out speed is the primary safest characteristic of a wind turbine as it protects wind-based turbines from external and power damage.81). Which of the following characteristics of wind type turbine is defined as the quantity of air passing over blades and via area of rotor which is responsible for operation of wind turbine? Rated speed Cut out speed Cut in speed Betz limit HintBetz limit characteristics of wind type turbine are defined as the quantity of air passing over blades and via area of rotor which is responsible for operation of wind turbine.82). What is the theoretical percentage value of wind collected by wind turbine? 40% 50% 59% 80% Hint59% is the theoretical value of wind collected by the wind turbines.83). What is the power density of blades, when 30 % of turbine output is 120 Watts/m3 ? 400 w/m3 350 w/m3 250w/m3 450 w/m3 HintThe power density of blades, when 30 % of turbine output is 120 Watts/m3 is 400w/m3.84). How much percent of solar energy reaches earth? 3% 2% 5% 60% HintOnly 2% of solar energy reaches earth.85). What is the percentage of wind on earth required for generating power? 3% 16% 20% 30% HintThe percentage of wind on earth required for generating power is 3%.86). What is the percentage of water on earth required for generating power? 3% 16% 20% 30% HintThe percentage of water on earth required for generating power is 16%.87). Wind energy is a ____ source of energy. Intermittent Portable Constant power None of the above HintWind energy is an intermittent source of energy.88). Which of the following are dispatchable type power resources for wind type turbine? Hydro based electrical power Gas based fire plant Both a and b None of the above HintHydro-based electrical power and gas-based fire plant are dispatchable type power resources for wind type turbines.89). Which of the following are the characteristics of power based management? Portable based power supply Geo based distributed type turbines Curtailing additional wind energy All the above HintThe characteristics of power-based management are portable-based power supply, geo-based distributed type turbines, and curtailing additional type wind energy.90). What is the value of global type winds energy (kinetic energy)? 1.50 MJ/m3 2MJ/m3 2.5MJ/m3 MJ/m3 HintThe value of global type winds energy (kinetic energy) is 1.50 MJ/m3.91). What is the percentage of wind power in 2019 for 1430TWh of power? 5.3% 4% 3% 5.5% HintThe percentage of wind power in 2019 for 1430TWh of power is 5.3%.92). What are the elements required for calculating wind actual power of wind? Capacity of name plate Capacity factor Material required Both a and b HintThe elements required for calculating the wind actual power of wind are the capacity of the name plate and the capacity factor.93). What is the percentage value of estimation factor for installing a wind turbines? 35 to 44% 30% 20% 15% HintThe percentage value of the estimation factor for installing a wind turbine is 35 to 44%.94). On which of the following variable parameters do wind energy generation depends on? Temperature Humidity Velocity All the above HintOn the temperature, humidity, pressure, and velocity parameters do wind energy generation depends.95). Which of the following county employs High Resolution based Limited Area type Model? India Europe Australia Japan HintEurope county employs High Resolution based Limited Area type Model for generating power from wind.96). Which of the following are physical type approaches for wind power forecasting? Integrating wind based profile modelling with geostrophic law to get surface wind Employing Computational Based Fluid Dynamics (CFD) code Including entire terrain All the above HintThe physical type approaches for wind power forecasting are integrating wind-based profile modeling with geostrophic law to get surface wind, employing Computational Based Fluid Dynamics (CFD) code, and Including entire terrain.97). Which of the following is the first step of windmills physical approach? Knowing the level of wind at wind farm Converting wind to electric Storing power Both a and b HintThe first step of windmills physical approach is knowing the level of wind at the wind farms.98). Which of the following is the second step of windmills physical approach? Knowing the level of wind at wind farm Converting wind to electric Storing power Both a and b HintThe second step of windmills physical approach is converting wind to electric.99). Which of the following is the third step of windmills physical approach? Knowing the level of wind at wind farm Converting wind to electric Storing power Both a and b HintThe third step of windmills physical approach is storing power.100). Which of the following wind mill factors are to be considered by engineer? Direction of wind Height of tower Climatic condition All the above HintThe windmill factors that are to be considered by engineers are the direction of the wind, height of the tower, climatic conditions, etc. Time is Up! Time's up
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