Wind Power Trivia
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46 free Wind Power trivia questions with answers — technology quiz, new questions added Sep 2026.
Wind now supplies more than 8% of the world's electricity, and the road from 9th-century Persian windmills to today's 26 MW offshore giants is full of surprises. This wind power trivia quiz covers the physics (why doubling wind speed gives eight times the power, what the Betz limit is, why blades are white), the pioneers (James Blyth's cloth-sailed turbine, Charles Brush's 144-blade monster in Cleveland, Poul la Cour, the Tvind school), and the modern industry of wind farms, capacity factors, curtailment and record-breaking projects like Hornsea. There are questions for beginners and for energy nerds alike, from 'how many blades?' to 'why do all turbines spin clockwise?'. Every answer is verified and cited to its reference page. If you enjoy this quiz, try our other energy, science and technology quizzes.
30 of 46 questions with answers and explanations. Play the quiz
Q 01As of 2025, which country generates the most electricity from wind, ahead of the second-placed United States?
China
China generates more wind electricity than any other country, with the United States second. Denmark leads on a different measure: wind supplies a bigger share of its own electricity than anywhere else.
Q 02Wind power climbs much faster than wind speed itself, so doubling the wind multiplies the available power by what factor?
Eightfold
Eightfold, because power rises with the cube of wind speed and two cubed is eight. It is why developers chase the windiest hilltops and coasts: slightly stronger wind yields far more electricity.
Q 03What is the housing at the top of a wind turbine tower, holding the gearbox and generator, called?
Nacelle
Nacelle housings hold the gearbox, generator and brake, and the whole box swivels on top of the tower to keep the rotor facing the wind.
Q 04Why are a wind farm's turbines set several rotor widths apart?
Each leaves a choppy wake
Each leaves a choppy wake of slowed air, much like the trail of a ship, so a turbine parked close downwind would get weaker, rougher wind. Spreading them out costs more in land, roads and cables, so every layout is a trade-off.
Q 05Hornsea One, the world's largest offshore wind farm when completed in 2019, stands off England in which sea?
North Sea
North Sea. Hornsea One stands about 120 km off the Yorkshire coast, where winds blow harder and more reliably than over land, which is what justifies the much greater cost of building at sea.
Q 06Which term describes a wind farm being made to cut output because the grid cannot absorb all the power?
Curtailment
Curtailment strikes when power lines are congested or supply outruns demand, so good wind goes unused. Grid operators fight it with new long-distance lines and with batteries that soak up the surplus.
Q 07A US wind farm averages about a third of its maximum output over a year, but which power source averages over 90%?
Nuclear
Nuclear plants run near flat out between refuelling stops, while wind's figure, called its capacity factor, tracks how often the wind blows hard. It is why a wind farm's headline megawatts overstate what it delivers.
Q 08Which instrument on a wind turbine's roof measures wind speed for the machine's controller?
Anemometer
Anemometer readings tell the controller when the breeze is strong enough to be worth starting up. Its neighbour, the wind vane, reads direction so the whole rotor can be turned to face the wind.
Q 09Which power source pairs naturally with wind because its output tends to peak just when wind is weakest?
Solar
Solar fits because wind tends to blow hardest at night and in winter, while calm, high-pressure summer days are the sunniest. Hybrid wind and solar plants use that seesaw to smooth their output.
Q 10A wind farm lasts 20 years or more, but about how long does it take to repay the energy spent building it?
Around a year
Around a year at most, and some studies say only a few months, so a wind farm spends nearly all of its working life in energy profit. The debt covers making, installing and finally scrapping it.
Q 11Wind turbines do kill birds, but which of these is by far the biggest human-linked killer of US birds?
Domestic cats
Domestic cats kill well over a billion US birds a year on federal wildlife estimates, thousands of times the toll from wind turbines. Collisions with glass buildings and with cars come next.
Q 12As of 2025, which oil-rich US state generates more electricity from wind than any other?
Texas
Texas generates more wind electricity than any other state, thanks to the wide, windy plains of its west. It built thousands of miles of new power lines to carry that output to its big cities in the east.
Q 13Why can no wind turbine capture more than about 59% of the wind's energy?
The air must keep moving
Q 21In the 1890s Danish pioneer Poul la Cour stored his windmill's electricity by using it to make which gas?
Hydrogen
Hydrogen, split from water by electrolysis, was stored in a tank and burned in the lamps of his folk high school at Askov, so the wind's energy gave light on still days too.
Q 22The famous windmills of Kinderdijk, a Dutch World Heritage Site, were built to do what?
Drain low-lying land
Drain low-lying land: the 19 mills have lifted water out of the polder since about 1740 and are kept in working order as back-ups for the modern pumps. Wind pumps like them turned Dutch lakes and marshes into farmland.
Q 23Vermont's Smith-Putnam turbine, the first megawatt wind machine, died in 1945 when what happened?
The air must keep moving: a rotor that took every bit of energy would stop the air dead behind it, leaving no room for more to arrive. Albert Betz worked out the best compromise, 16/27 of the wind's energy.
Q 14A modern wind turbine blade is driven round on the same principle as which of these?
Aircraft wing
Aircraft wing and turbine blade share the same curved profile: air flowing across it lowers the pressure on one side, and that difference pulls the blade round. Helicopter rotors work the same way.
Q 15The earliest documented windmills, with sails turning on an upright shaft to grind grain, were built in which land?
Persia
Persia, in the Sistan region on today's Iran-Afghanistan border, where a fierce summer gale known as the 120-day wind still blows. Europe's familiar windmills, with sails on a horizontal axle, came centuries later.
Q 16The ancient engineer Hero of Alexandria described a windwheel that powered which musical instrument?
Organ
Organ pipes sounded as pegs on the windwheel's shaft lifted a piston and let it drop, pushing air through them. Written in the first century AD, the design was a toy or a concept rather than a working mill.
Q 17Which Scottish engineer lit his holiday home in July 1887 with one of the earliest electricity-generating wind turbines?
James Blyth
James Blyth charged a bank of batteries from a cloth-sailed windmill in his garden at Marykirk. Austrian engineer Josef Friedländer had shown a wind-driven dynamo in Vienna in 1883, so the title of 'first' is disputed.
Q 18Why did the villagers of Marykirk, Scotland, turn down free wind-powered street lighting in the 1880s?
It was the devil's work
It was the devil's work, the villagers decided, so the engineer kept the surplus power for his own cottage. He later built another turbine as an emergency supply for an asylum, but with coal cheap and plentiful the idea never caught on.
Q 19Small wind generators powered many American farms in the 1920s, until what made them redundant in the 1930s?
Grid power lines arrived
Grid power lines arrived through federal rural electrification, and steady mains current beat a breeze-dependent battery set. Until then the little windchargers had run lights, radios and even fridges across the Great Plains.
Q 20Which building did Charles Brush's 144-blade turbine light from 1888?
Mansion
Mansion: Brush's Cleveland home ran on the turbine's batteries for some 20 years. Its slow 17-metre wheel made only 12 kW, and Poul la Cour soon showed that fewer, faster blades generate far more.
A blade broke off
A blade broke off at a known weak spot near its root, patched but never fully reinforced amid wartime shortages. A study then judged the design uneconomic, and the project was dropped.
Q 24Which Danish maker of hydraulic cranes sold its first wind turbine in 1979 and grew into a giant of the industry?
Vestas
Vestas nearly went under in 1986, suspending payments after its big American orders fell through. Much of the group was sold, and the slimmed-down company that emerged made wind turbines and nothing else.
Q 25Which event triggered the Danish and US push toward utility-scale wind generators?
The 1973 oil crisis
The 1973 oil crisis sent fuel prices soaring and governments hunting for home-grown energy. Washington paid for giant test turbines, while Denmark's small workshops built the modest machines that grew into today's industry.
Q 26Denmark's giant Tvindkraft wind turbine, which began making electricity in 1978, was designed and built largely by whom?
Schoolteachers and volunteers
Schoolteachers and volunteers, most with no engineering background, built it on the Tvind school campus in West Jutland. More than four decades later it was still generating power with most of its original parts.
Q 27In the early 1980s, a 'wind rush' planted thousands of turbines, many of them Danish-built, in which US state?
California
California's state and federal incentives drew thousands of small turbines into its windy passes. When the support schemes ended in the mid-1980s, the American market collapsed almost overnight.
Q 28Germany's giant Growian wind turbine of 1983, with a 100-metre rotor, stood idle for most of its life because of what?
Parts kept breaking
Parts kept breaking under loads nobody had handled at that size, so the rotor barely turned before the machine was scrapped after a few years. Denmark's makers, by contrast, started small and scaled up step by step.
Q 29US federal guidance says wind turbines should be painted white or light grey, for which reason?
Daytime visibility for aircraft
Daytime visibility for aircraft is the reason: the Federal Aviation Administration calls white or light grey the most effective colours for making a turbine stand out by day. Most are in fact light grey, the darkest shade it accepts.
Q 30The turbines of Hywind Scotland, opened in 2017, float rather than stand on the seabed; what does that allow?
Sites in deeper water
Sites in deeper water: Hywind Scotland's five turbines ride in about 100 metres of sea off Peterhead, too deep for foundations fixed to the bottom. It was the world's first floating wind farm.