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Ready-made multiple-choice practice quizzes, hand-checked. Take any free quiz online — every answer comes with an explanation, and every quiz page has a full answer key to revise from.
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Free · no sign-up · no time limit
Ready-made multiple-choice practice quizzes, hand-checked. Take any free quiz online — every answer comes with an explanation, and every quiz page has a full answer key to revise from.
Motoring
Examine the technical principles, layouts, and operating cycles of internal combustion and electric motors. Answer each question to see whether you got it right, with an explanation every time.
A free 6-question multiple-choice practice test on Motoring. Each question has one correct answer and a short explanation, and the full answer key below the player doubles as a study sheet. No account, no time limit — take it as often as you like.
This is a free, 6-question multiple-choice quiz. Answer each question to see whether you got it right, with an explanation for every answer. There is no sign-up and no time limit — take it as many times as you like, and use the answer key above to revise before or after.
Correct answer: AIntake, Compression, Power, Exhaust
The Otto cycle comprises intake (drawing mixture), compression, power (expansion after ignition), and exhaust (expelling burnt gases).
Correct answer: BExtreme heat generated by high compression
Diesel engines lack spark plugs; they compress ambient air to extreme pressures, raising temperatures high enough to ignite atomized fuel instantly.
Correct answer: CCrankshaft
Pistons push connecting rods against offset crankpins, causing the crankshaft to spin and deliver mechanical rotational energy.
Correct answer: AWankel engine
Felix Wankel designed the rotary engine, which employs an eccentric rotor turning inside an epitrochoidal housing without reciprocating pistons.
Correct answer: AA turbocharger is driven by exhaust gases, while a supercharger is driven mechanically by the crankshaft
Turbochargers harvest waste energy from expanding exhaust gas to spin a turbine, whereas superchargers are belt-driven directly off the engine crank.
Correct answer: BStator
The stator contains phase windings supplied with alternating current to establish the electromagnetic field that induces or pulls the rotor.