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.
- timing belt
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?
- 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:
- 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.