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Engine Quiz
by Staff
It's under the hood of every car, truck and SUV (unless the vehicle is electric), but how many people really know how an engine works? Do you know a spark plug from a fuel injector? Test your auto smarts in our engine quiz.

What are the two main components of the engine cooling system in most cars?

  • air intake and turbocharger
  • battery and fan
  • radiator and water pump

What happens if your car leaks or burns off all of its oil?

  • It’ll start an oil fire.
  • The engine will seize.
  • It’ll cause oil poisoning.

What are the three common ways to deliver fuel to an engine?

  • carburetion, hybridization, electrical charging
  • fuel injection, infusion, circulation
  • carburetion, port fuel injection, direct fuel injection

What is an octane rating?

  • a way to tell how fast a car can go
  • a way to tell how much the fuel can be compressed
  • a way to tell how much the engine will wear out

What is an engine’s redline?

  • how much nitrous oxide you can use
  • an engine’s maximum rpms
  • an equation that determines when the turbo kicks in

A car engine's job is to:

  • convert fuel into heat
  • convert fuel into motion
  • convert fuel into exhaust

A car uses a four-stroke engine. The four strokes are:

  • intake, compression, combustion and exhaust
  • injection, rotation, combustion and exhaust
  • injection, carburetion, rotation and exhaust

A crankshaft's job in an engine is to:

  • deliver fuel to the cylinders
  • change linear motion into rotational motion
  • keep cylinder heads in place

A timing belt or timing chain links these two components together so that the valves are in sync with the pistons:

  • the flywheel to the camshaft
  • the crankshaft to the camshaft
  • the cylinder head to the camshaft

There are three basic failures that can happen in an engine: bad fuel mix, lack of compression and:

  • lack of exhaust
  • lack of water
  • lack of spark

In a car engine's cylinder, valves let fuel in and exhaust out. The ______ moves these valves.

  • camshaft
  • timing belt
  • distributor

A turbocharger is:

  • a set of gears that makes the wheels turn faster
  • a turbine that compresses the air traveling into the engine
  • an injector that delivers fuel to the engine faster

When you turn the key to a car, the starter motor:

  • sends electricity to the spark plugs, starting ignition
  • sends electricity to the fuel pump, forcing the car to start
  • spins the engine a few revolutions, starting the combustion process

Modern cars use internal combustion engines, but some early models used external combustion engines. What is one example of an external combustion engine?

  • steam engine
  • firecracker engine
  • hydroponic engine

Why don’t we use steam engines for cars anymore?

  • They set off too many smoke alarms.
  • They smelled too bad.
  • They aren’t as efficient.

What are the three common ways to arrange an engine’s cylinders?

  • V-6, V-8, HEMI
  • inline, V, flat
  • inline, flat, rotary

What might happen if water gets into your gas tank?

  • It’ll make it hard for the engine to burn the fuel.
  • It’ll help the car get better gas mileage.
  • It’ll make the engine blow up.

Which of these cars features a popular example of an air-cooled engine?

  • the Tesla Model S
  • the Volkswagen Beetle
  • the Ford Model T

Which of the following commonly uses air-cooled engines?

  • motorcycles
  • hybrid cars
  • Oscar Mayer Wienermobiles

What is the steam engine’s main advantage?

  • It’s easy to fix.
  • It can use anything as fuel.
  • Steam pollutes less.

What are two of the main advantages to a 4-cylinder engine?

  • It’s efficient and compact.
  • It’s faster and makes less exhaust.
  • It’s cheaper and can use watered-down gas.

What are two other terms for engine knock?

  • banging and clunking
  • clicking and clacking
  • pinging and detonation

When a car's engine is running, power to operate the radio, CD player, headlights and windshield wipers comes from the:

  • alternator
  • battery
  • spark plugs

Name one of the causes of engine knock.

  • the wrong spark plugs
  • driving too fast
  • being low on oil

What are the three functions of engine oil?

  • lubrication, cooling, cleaning
  • lubrication, getting rid of exhaust smell, making gas more powerful
  • cooling, cleaning, making more money for Jiffy Lube

What’s another name for the four-stroke engine cycle?

  • Otto cycle
  • Tesla cycle
  • compression cycle

Why does engine oil need to be changed?

  • The engine’s movement compresses too much oil.
  • It gets too dirty to work.
  • The oil evaporates in the summer.

A device that works on the same principle as a car engine is:

  • a nuclear submarine
  • a giant robot
  • a spud gun

What does ECM stand for, and what does it do?

  • engine control module, which is the engine’s computer
  • engine catheter manager, which controls the oil coming out of the engine
  • European custom mechanical, which helps race car owners keep track of their modifications

Why does a diesel engine get better mileage than a gasoline engine?

  • because of coal rolling
  • because it contains more energy
  • Actually, it doesn’t.