🚗 Car Engineering & Tech Trivia Questions & Answers
Engines, gearboxes, EVs and the clever engineering under the hood. Below are 30 free car engineering & tech trivia questions with answers — part of Cars trivia on BUZZ. Want a real challenge that adapts to what you know? Play the Cars quiz — no signup needed to start.
30 Car Engineering & Tech trivia questions
Q1. What did Oldsmobile call its 1940 option that finally let drivers ditch the clutch pedal for good?
Answer: Hydra-Matic
💡 It was such a hit that GM had sold almost a million Hydra-Matic-equipped cars by 1949, even though it debuted as a pricey $57 option.
Q2. Which tire maker patented the modern radial tire back in 1946?
Answer: Michelin
💡 It went on sale to the public a few years later, in 1949, under the name 'Michelin X.'
Q3. By the late 1980s, what fuel-delivery tech had almost entirely replaced carburetors in new cars?
Answer: Fuel injection
💡 The Subaru Justy, sold until 1990, is often cited as the last carbureted car sold new in the US.
Q4. Which German engineer built the first practical four-stroke engine back in 1876?
Answer: Nikolaus Otto
💡 The four-stroke cycle is still called the 'Otto cycle' today, even though it was patented earlier by Alphonse Beau de Rochas.
Q5. Which Swedish carmaker gave the world the modern three-point seatbelt design for free in 1959?
Answer: Volvo cars
💡 Engineer Nils Bohlin's design is credited with saving well over a million lives worldwide.
Q6. What job title did Nils Bohlin hold at Volvo just before he designed the three-point seatbelt?
Answer: Chief safety engineer
💡 Bohlin had previously designed ejector seats for Saab fighter planes, which shaped his safety-harness thinking.
Q7. Which Toyota model became the world's first mass-produced hybrid car, launched in Japan in 1997?
Answer: The Prius
💡 The name comes from the Latin word for 'before' or 'prior'.
Q8. Which English inventor built the first production electric car, in Wolverhampton back in 1884?
Answer: Thomas Parker
💡 Parker also helped electrify the London Underground.
Q9. Which American inventor patented the first practical windshield wiper back in 1903?
Answer: Mary Anderson
💡 Manufacturers were initially skeptical it would distract drivers — but by 1916, wipers were standard equipment on most American cars.
Q10. A diesel engine ignites its fuel using heat from compression, not from what part?
Answer: A spark plug
💡 This is why diesels are called 'compression-ignition' engines, while petrol engines are 'spark-ignition' engines.
Q11. A car's differential lets which two things spin at different speeds while turning?
Answer: Left and right wheels
💡 Without it, tires would scrub and wear rapidly every time the car went around a corner.
Q12. Unlike a supercharger, what actually spins a turbocharger's compressor wheel?
Answer: Exhaust gas
💡 Because it runs on exhaust energy rather than stealing power from the crankshaft, a turbo is often called 'free' power.
Q13. Lithium-ion batteries pack so much energy per pound thanks mainly to lithium being how?
Answer: An extremely light metal
💡 Lithium is the lightest of all metals, exactly why it suits a battery meant to move around in a car.
Q14. Blind engineer Ralph Teetor invented what feature after his lawyer's speed changes annoyed him?
Answer: Cruise control
💡 Teetor lost his sight at age five but still became a top mechanical engineer, patenting his speed-control device in 1950.
Q15. What three-letter acronym names a transmission with no fixed gears and a smoothly infinite range?
Answer: CVT
💡 Dutch carmaker DAF built one of the first commercially successful versions, called the Variomatic, back in 1958.
Q16. What nickname honors the engineer behind the four-stroke combustion cycle's first working engine?
Answer: Otto cycle
💡 Frenchman Alphonse Beau de Rochas actually patented the idea first in 1862, but Otto built the first working engine.
Q17. What tragic event reportedly pushed Cadillac to fund Kettering's electric self-starter project?
Answer: A man died from a hand-crank injury
💡 The victim, Byron Carter, was helping a stalled driver when the crank kicked back and broke his jaw, leading to fatal sepsis.
Q18. Roughly how fast must a crash sensor trigger an airbag for it to actually help in a collision?
Answer: About 40 milliseconds
💡 Early GM and Ford experiments in the late 1950s struggled to make sensing and inflation both fast and reliable enough.
Q19. Which French-born oil-refining pioneer also invented the automotive catalytic converter?
Answer: Eugene Houdry
💡 Houdry was motivated by early 1950s reports on smog choking Los Angeles.
Q20. In which US desert region did the first DARPA Grand Challenge test driverless cars in 2004?
Answer: Mojave Desert
💡 Not a single vehicle finished that first race — the furthest car managed only about 7 miles before getting stuck.
Q21. Which university's car 'Stanley' won the 2005 DARPA Grand Challenge and its $2 million prize?
Answer: Stanford University
💡 Stanley completed the 132-mile Nevada desert course in just under seven hours.
Q22. Which carmaker's 1951 'Hydraguide' was the first commercially available power steering system?
Answer: Chrysler
💡 The system built on patents from engineer Francis Davis, who'd demonstrated power steering as early as 1926.
Q23. Mercedes-Benz built the first production car with a modern crumple zone in 1959, patented by whom?
Answer: Béla Barényi
💡 Barényi's 1952 patent split the car into a rigid centre cell with crushable front and rear sections — the same basic idea every car uses today.
Q24. The Galvin brothers' car-radio firm fused 'motor' with a nod to which rival phonograph brand?
Answer: Victrola
💡 The 1930 prototype radio was fitted into inventor Paul Galvin's own Studebaker, which he then drove 800 miles to show it off.
Q25. In what year was Rudolf Diesel granted his patent for the compression-ignition engine?
Answer: 1893
💡 His first working prototype ran later that same year in a workshop in Augsburg, Germany.
Q26. Which 1953 Le Mans winner became the first car to take that race using disc brakes?
Answer: Jaguar C-Type
💡 Its disc brakes helped it out-brake rivals lap after lap, becoming the first Le Mans winner to average over 100 mph.
Q27. What do the letters DOHC stand for on a high-performance engine's spec sheet?
Answer: Dual overhead camshaft
💡 Splitting intake and exhaust valves onto separate cams lets the engine breathe better at high RPM.
Q28. A belt-and-pulley CVT changes its gear ratio by adjusting what about its pulleys?
Answer: Their effective diameter
💡 Sliding the pulley halves closer or farther apart lets a CVT sweep through ratios with no shift steps at all.
Q29. Regenerative braking recovers energy by briefly turning an electric motor into what?
Answer: A generator
💡 The spinning wheels drive the motor backwards, and the induced current recharges the battery instead of just heating the brakes.
Q30. In a parallel hybrid, unlike a series hybrid, what connects directly to the wheels?
Answer: The engine and motor
💡 A pure series hybrid's engine only ever generates electricity — it never physically turns the wheels itself.
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