Interesting Facts Quiz: Engines

By: Robin Tyler
Image: Wiki Commons via Gearheadgirl

About This Quiz

The internal combustion engine is certainly one of, if not the most important invention in human history.

Just think about it. What would we do without them? Well, perhaps most importantly, we wouldn't have cars, the most significant form of transport in human history.

It is always amazing to think that all those years ago, engineers sat and devised a way to not only build the internal combustion engine but then use it to drive a "horseless carriage." It boggles the mind, really. 

And soon, the internal combustion engine became more and more powerful. That power allowed it to be put into not only cars but aircraft as well. Incredible.

The engine is a complex thing, filled with many moving parts. And the amazing thing is that each is as important as the other. If one breaks, even the smallest of parts - well that could spell problems! And modern engines are not only mechanical but even have complex onboard computers that help them to run.

So in this quiz, we are going to explore interesting facts about engines and see just how much you know about them. Some questions are a breeze, while others will really test your knowledge!

Good luck!


Without the internal combustion engine, cars would not exist today as we know them.

It was Nikolaus Otto who invented the internal combustion engine in the late 1800s.

By compressing the air/fuel mix, the piston helps to create the combustion stroke

Each cylinder in the engine has a spark plug which ignites the air/fuel mixture at the end of the compression stroke.

All pistons are secured to the crankshaft via a connecting rod.

The tailpipe is connected to the vehicle through the exhaust system.

The crankshaft changes the linear motion of the piston stroke into a rotational one which turns the driveshaft and makes a vehicle move.

A piston is found within a cylinder.

Each arrangement has its own unique pros and cons.

The most common configuration for the cylinders in an engine is inline.

The sole job of the spark plug is to provide the combustion spark that ignites the air/fuel mix.

The piston, moving within the cylinder, is what creates the compression of the air/fuel mixture which is then combusted and burns away to provide power

The name is a giveaway! Overhead cam engines have a camshaft situated above the valves. This is the most common type of layout in engines.

A timing belt is crucial to ensure the engine fires correctly by keeping valves and pistons in sync.

For every two turns of the turn of the crankshaft, the camshaft turns half a turn. This is achieved through gearing.

A high-voltage charge, generated by the ignition, is needed at exactly the right time to ensure the spark plug ignites the air/fuel mixture.

Because no fluid is moving through the engine to cool it down in an air-cooled engine, they do run at higher temperatures.

Most vehicles you will see on the road run normally aspirated engines.

Pressurizing the air leads to better performance of the engine.

The higher the pressure achieved, the greater the boost.

The starter motor is the what sets up the whole process in action. It cranks the engine over, which in turn sees the engine operate under its own power.

The fuel system ensures that the correct amount of fuel is sent from the tank to the engine where it is mixed with air for the combustion process to begin.

The carburetor is crucial to the whole process. It needs to mix the right amount of fuel and air, otherwise the engine runs to lean or too rich.

The tailpipe is at the end of the exhaust system and lets the gases formed by combustion out of the engine while the muffler helps to keep the sound the engine produces muffled.

As there are so many moving parts within the engine, oil is necessary to keep everything lubricated.

The catalytic converter helps to ensure that the gas emitted by the exhaust system is as clean as possible.

A battery is necessary to provide the initial power to turn the starter motor over and begin the ignition process.

The more cylinders or the bigger the cylinders, the more power an engine can generate.

By burning more fuel, an engine generates more power.

Cooler air helps to generate more power.

Dual exhaust systems help remove the gases generated by the combustion process and helps to avoid any back pressure.

A diesel engine has no spark plugs, as the air is first compressed before the fuel enters the chamber This compression generates enough heat to attain combustion.

Along with air, an internal combustion engine needs fuel to combust to provide power.

Diesel is able to generate more torque, as it has a higher energy potential than gasoline.

When fuel is not ignited properly, it can cause a problem called engine knocking as the engine does not run as it should.

Every engine runs best with the right gas in it. Know which octane rating your engine needs when you fill up with gas.

Hi-tension leads give the spark plugs the electrical surge they need from the distributor to be able to produce a spark.

Essentially the brains of the vehicle, the Engine Control Module is vital in ensuring an engine runs at optimal performance.

Intake brings the air/fuel mix into the combustion chamber, where it is compressed and combusted, providing power, and then the exhaust gases are removed.

The intake stroke allows both air and fuel into the combustion chamber, where it is burned to provide power for the vehicle.

About Zoo

Our goal at Zoo.com is to keep you entertained in this crazy life we all live.

We want you to look inward and explore new and interesting things about yourself. We want you to look outward and marvel at the world around you. We want you to laugh at past memories that helped shape the person you’ve become. We want to dream with you about all your future holds. Our hope is our quizzes and articles inspire you to do just that.

Life is a zoo! Embrace it on Zoo.com.

Explore More Quizzes