Wind Energy Question & Answers September 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 Hint 2). Which of the following are renewable energies? Wind Water Wood All the above Hint 3). Which of the following are the main components used during generation of wind type energy? Fan Wind Batteries All the above Hint 4). Which of the following are the events that allows in generation of electricity? Solar heat Earth surface Moving of earth All the above Hint 5). Which of the following is the purpose of wind energy generation? Grinding grain Pumping water Generating power All the above Hint 6). Wind turbines are of ____ types. 2 3 4 5 Hint 7). How many blades do horizontal wind type turbines have? 2 3 4 5 Hint 8). The power generated by an horizontal type wind turbines for basic applications is _______. Less than 100kW 100 kW 1000 kW Greater than 100kW Hint 9). The power generated by an horizontal type wind turbines for offshore is ________. 6MW 6W 50MW 10W Hint 10). Which of the following are the basic components of a horizontal type wind turbines? Gear box Controller Accelerometer All the above Hint 11). Which of the following component is connected to gear box in horizontal type wind turbine? Low speed shaft High speed shaft Controllers Accelerometer Hint 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 Hint 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 Hint 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 Hint 15). Which of the following component is connected to generator box in horizontal type wind turbine? Low speed shaft High speed shaft Controllers Accelerometer Hint 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 Hint 17). What happens to speed when in high speed type shaft of horizontal wind turbine? Zero Critical Infinity 1 Hint 18). Which of the following component does not exist in direct driven type horizontal wind turbine? Gear box Blades Controllers Anemometer Hint 19). Which of the following is the major component of a commercial type wind turbines? Computer PLC’s Shafts Both a and b Hint Read more about PLC. 20). In how many ways a horizontal type wind turbines can control output based frequency? 2 3 4 5 Hint 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 Hint 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 Hint 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 Hint 24). A controller in commercial type wind turbines are provided with data from ________. Anemometer Yaw drive Rotor Wind vane Hint Read more about Anemometer. 25). Which of the following phases are used in vertical type wind turbine? Single Two Three Both a and c Hint Wind Energy MCQs for Interviews 26). 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 Hint 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 Hint 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 Hint 29). What is the height of HAWT tower? 40 to 100 meters 50 meters 110 meters 30 meters Hint 30). Which of the following component is used in controller of vertical type wind turbine? Meter Motor Sensor All the above Hint Read more about Sensor. 31). Which of the following are the components of horizontal type wind turbine? Break Gears AC generators All the above Hint Read more about AC Generators. 32). How many number of blades allow wind turbine to operate at higher speed? More Lesser Zero Single Hint 33). Which of the following are advantage of single type blade turbines? Less weight Operates at higher speed Occupies less area All the above Hint 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 Hint 35). Which of the following are the disadvantages of two bladed wind type turbine? Noisy Failure in operation High maintenance All the above Hint 36). Which of the following are advantages of two blade type turbine? Less weight Generates maximum energy Less vibration All the above Hint 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 Hint 38). Which of the following are the disadvantages of three blade type turbine? Higher in weight Expensive Employs yaw control All the above Hint 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 Hint 40). What is the formula for power used for wind turbine? P=E/t P=0 P = E P= E/m Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint 47). Which of the following country have “Jaisalmer based Wind Park”? India China US Romania Hint 48). What is the energy capacity generated from Muppandal wind farm of India? 1500 MW 1064 MW 850 MW 736 MW Hint 49). What is the energy capacity generated from Jaisalmer wind farm of India? 1500 MW 1064 MW 850 MW 736 MW Hint 50). Which of the following country stands high in generation of wind power? China India US Romania Hint Wind Energy Exam Questions & Answers 51). Which of the following is the advantage of wind energy? No carbon dioxide emission Eco-friendly More power generation All the above Hint 52). What is the percentage efficiency of aero based turbine mill (horizontal type windmill)? 35 45 30 50 Hint 53). What is the percentage efficiency of aero based farm mill (horizontal type windmill)? 35 15 30 50 Hint 54). What is the efficiency of Giromill type wind mill? 35% 40% 30% 25% Hint 55). Which of the following is the advantage of vertical type windmill? Low cost Light weight High efficiency All the above Hint 56). What is the efficiency percentage of cyclo based gyro type windmill? 60% 30% 40% 50% Hint 57). Which of the following component of wind mill collects wind based energy? Generator Hub Rotor Blades Hint 58). What are other materials present in rotor component of standard windmill? Wood Fiber glass Metal blades All the above Hint 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 Hint 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 Hint 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 Hint 62). What is the tip based speed ratio of lift based wind turbine? 10 20 30 100 Hint 63). Which of the following factors effect the performance of wind based turbine? Blades number Area occupied Speed Both a and b Hint 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 Hint 65). Which of the following component of wind mill transduces rotatory blades wind based energy into electric power? Generator Rotor Blades Gears Hint 66). What is the AC voltage used for domestic appliances? 240V/50 cycles 210V/50 cycles 200V/50 cycles 120V/50 cycles Hint 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 Hint 68). What is the range of transmission rate of windmill’s rotors component? 40-400rpm 10-250rpm 50-100rpm 0-40rpm Hint 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 Hint Read more about Generator. 70). What happens to the speed of wind mill on adding gearbox? Increases Decreases Constant Zero Hint 71). In direct based drive system the rotor of windmill has direct interface with _______ component. Generator Blade Motor All the above Hint 72). Which of the following are the characteristics of wind tower? Support wind based turbines Handles vibrations occurred Weather resistance All the above Hint 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 Hint 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 Hint 75). What is the rated speed required for a 10 KWatts wind turbine to produce 10KWatts power? 40kmph 30kmph 35kmph 38kmph Hint Wind Energy MCQs With Answers 76). What is the standard reference rated speed of windmill machines? 40 – 55 kmph 10 – 20 kmph 30 – 40 kmph 40 kmph Hint 77). What happens to speed of wind between cut in speed and rated speed? Increases Decreases Infinity Zero Hint 78). What happens to turbines if they operate at higher speed of 128kmph? Rotates even more Rotates slow Shuts off Rotates at constant rate Hint 79). Which of the following is defined as speed at which windmill stops functioning? Cut out speed Betz limit Rated speed Cut in speed Hint 80). Which of the following is the primary safest characteristics of a wind turbine? Cut out speed Betz limit Rated speed Cut in speed Hint 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 Hint 82). What is the theoretical percentage value of wind collected by wind turbine? 40% 50% 59% 80% Hint 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 Hint 84). How much percent of solar energy reaches earth? 3% 2% 5% 60% Hint 85). What is the percentage of wind on earth required for generating power? 3% 16% 20% 30% Hint 86). What is the percentage of water on earth required for generating power? 3% 16% 20% 30% Hint 87). Wind energy is a ____ source of energy. Intermittent Portable Constant power None of the above Hint 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 Hint 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 Hint 90). What is the value of global type winds energy (kinetic energy)? 1.50 MJ/m3 2MJ/m3 2.5MJ/m3 MJ/m3 Hint 91). What is the percentage of wind power in 2019 for 1430TWh of power? 5.3% 4% 3% 5.5% Hint 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 Hint 93). What is the percentage value of estimation factor for installing a wind turbines? 35 to 44% 30% 20% 15% Hint 94). On which of the following variable parameters do wind energy generation depends on? Temperature Humidity Velocity All the above Hint 95). Which of the following county employs High Resolution based Limited Area type Model? India Europe Australia Japan Hint 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 Hint 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 Hint 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 Hint 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 Hint 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 Hint Time is Up! 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