James Watt Trivia
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44 free James Watt trivia questions with answers — technology quiz, new questions added Sep 2026.
This James Watt trivia quiz covers the Scottish instrument maker whose improved steam engine powered the Industrial Revolution. It begins in Greenock with a shipwright father, a year's training in London and a workshop at the University of Glasgow, then follows the famous walk across Glasgow Green in May 1765 when he realised that a separate condenser would stop Newcomen's engine wasting most of its heat. From there it covers John Roebuck and Kinneil, the 1769 patent, John Wilkinson's bored cylinders, the partnership with Matthew Boulton at Soho, the first engines pumping Cornish mines in 1776, the sun-and-planet gear, parallel motion, the centrifugal governor and the indicator diagram, the coal-savings royalty that led him to invent horsepower, his letter-copying press and sculpture-copying machines, the Lunar Society, his patent wars, retirement to Heathfield Hall and the naming of the watt. It also busts the boiling-kettle myth and explains the £50 note he shares with Boulton. Every answer is checked against Wikipedia's articles on Watt, his engine, his partners and his units, and each explanation adds one further fact. Ideal for engineering students, history buffs and quiz setters covering great inventors.
30 of 44 questions with answers and explanations. Play the quiz
Q 01Paul Crutzen tied the start of which proposed epoch to Watt's steam engine?
The Anthropocene
The Anthropocene was pitched as the age of human impact, but in 2024 the bodies that set Earth's time scale rejected it as a formal epoch.
Q 02What was the trade of Watt's father?
Shipwright
Shipwright: in his father's workshops young James built models and grew familiar with ships' instruments, which led him to train as an instrument maker.
Q 03Watt's son James Junior was denounced in Parliament for supporting which revolution?
The French Revolution
The French Revolution: in 1792 he delivered a greeting from a Manchester reform society to the Jacobin Club in Paris, and later had to clear his name at home.
Q 04In which city did the young Watt spend a year training as an instrument maker?
London
London: hard work on little food broke his health within the year, though he had learned enough to work as well as most journeymen.
Q 05At which university did Watt run a small workshop as an instrument maker?
Glasgow
Glasgow: after he repaired astronomical instruments for the university, it let him set up a workshop on its grounds and named him its instrument maker.
Q 06What did Watt realise was wasting energy in Newcomen engines?
The cylinder was repeatedly cooled and reheated
The cylinder was repeatedly cooled and reheated, so most of the steam's heat went into rewarming cold metal instead of driving the piston.
Q 07Two members of Watt's Birmingham scientific circle were both grandfathers of which famous naturalist?
Charles Darwin
Charles Darwin: Erasmus Darwin and potter Josiah Wedgwood were his grandfathers, and Erasmus had published his own theory of evolution decades earlier.
Q 08Which chemist, famous for the concept of latent heat, helped fund Watt's early engine work?
Joseph Black
Joseph Black had discovered latent heat years before, yet Watt found it again on his own while testing steam, unaware of his friend's work.
Q 09Short of money for his engine, Watt spent years marking out routes for what in Scotland?
Canals
Canals: decades later the Caledonian Canal through Loch Ness was built along a route he had proposed.
Q 10What did Watt's first patent cover?
Separate condenser
Separate condenser: Boulton joined Watt in asking Parliament to extend the patent, and a 1775 Act stretched it to 1800.
Q 11Knowing little about music, which instrument did Watt build for a masonic lodge?
An organ
An organ: though he scarcely knew one note from another, he added improvements of his own, and musicians admired the result.
Q 12Which ironmaster's precision boring, first developed for artillery, gave Watt tight-fitting cylinders?
John Wilkinson
John Wilkinson supplied the cylinders and was also a customer: one of the first two Watt engines of 1776 went to work at his own ironworks.
Q 13Where were most of the first commercial Watt engines installed?
Cornish mines
Cornish mines: fuel was costly in Cornwall, so managers of its copper and tin mines were eager for an engine that burned far less.
Q 21One watt equals one what per second?
Joule
Joule: that unit honours James Prescott Joule, who showed that mechanical work can be turned into heat.
Q 22Who proposed naming the unit of power the watt in an 1882 address to the British Association?
C. William Siemens
C. William Siemens said Watt was the first with 'a clear physical conception of power', and in the same address put a horsepower at 746 watts.
Q 23Which invention did Watt patent in 1780 to save time on his vast correspondence?
A method of copying letters
A method of copying letters: ink from a fresh letter was pressed onto thin damp paper, and offices still used the process into the 20th century.
Q 14Which mechanism did Watt use for rotary motion because a rival held the crank patent?
The sun and planet
The sun and planet: the crank's patent holders offered to swap licences with Watt, but he flatly refused.
Q 15Which invention did Watt say he was more proud of than any other?
The parallel motion linkage
The parallel motion linkage: 'I have started a new hare,' he wrote to Boulton in 1784, having found a way to guide the piston rod without chains.
Q 16Which device did Watt add to his engines in 1788 at Boulton's suggestion?
The centrifugal governor
The centrifugal governor was an older idea Watt adapted: its spinning balls swung outward as the engine sped up, narrowing the steam valve.
Q 17Which Watt device drew a diagram of pressure against volume inside the cylinder?
The steam indicator
The steam indicator's pressure-volume diagrams became central to thermodynamics after Clapeyron used one to explain the Carnot cycle in 1834.
Q 18In Watt's double-acting engine, what did the steam do?
Pushed the piston both ways
Pushed the piston both ways: one of the earliest such engines drove the Albion flour mill from 1786, until fire gutted the mill in 1791.
Q 19Watt modelled a flexible pipe laid under the River Clyde on the tail of which animal?
A lobster
A lobster: the riverbed was too uneven for rigid pipes, so Watt designed a jointed iron tube that could bend along it.
Q 20Which kind of business, whose mills ran on horses, led Watt to start rating engines in horsepower?
A brewery
A brewery: it burned no fuel for an engine to save, so Watt compared his engine with the horses it would replace instead.
Q 24Which chemical process did Watt investigate after meeting the chemist Berthollet?
Bleaching textiles
Bleaching textiles: Watt passed the chlorine method to his father-in-law, a bleacher, who put it to work on cloth.
Q 25Which Birmingham intellectual circle counted Watt among its important members?
The Lunar Society
The Lunar Society met near the full moon, so members had moonlight to travel home by in an age without street lighting.
Q 26Who took over the engine firm when Watt retired in 1800?
His and Boulton's sons
His and Boulton's sons took over, though in truth they had already been managing more and more of the business for years.
Q 27What was the name of the house where Watt died?
Heathfield Hall
Heathfield Hall: the house was later demolished, but its old gatehouse lodge still stands, marked with a blue plaque to him.
Q 28Where was Watt buried?
St Mary's Church, Handsworth
St Mary's Church, Handsworth, was later enlarged over his grave, so he now lies inside, in a chapel holding Chantrey's marble statue of him.
Q 29Chantrey's colossal statue of Watt was first placed in which church?
Westminster Abbey
Westminster Abbey: the statue was later removed from the Abbey and has since been kept at other sites.
Q 30On which Bank of England note did Boulton and Watt appear together from 2011?
£50
£50: in 2021 the Bank of England replaced the pair with the codebreaker Alan Turing on a new plastic £50.