Quiz: The Two-Stroke Engines Quiz
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The Two-Stroke Engines Quiz
By: Staff
Image: refer to hsw

About This Quiz

What's more powerful - a two-stroke engine or a four-stroke engine? Think you know? Prove your engine expertise by acing this quiz!

So, let's start with the basics. All engines have pistons that perform a specific number of strokes to complete a power cycle. Four-stroke engines complete the cycle with four strokes of the piston, resulting in two revolutions of the crankshaft. Two-stroke engines complete the cycle with two strokes of the piston, resulting in one revolution of the crankshaft. Two-stroke engines get the job done with fewer parts and are therefore lighter, which in turn makes the engine more efficient.

Because two-stroke engines are lighter, they are perfect for smaller gasoline engines, such as those used in lawnmowers, chainsaws and even model airplanes and motorcycles. But even when the weight factor does not come into play, two-stroke engines are more efficient, making them ideal for many applications. Even if you aren't particularly familiar with the difference between a two-stroke engine and a four-stroke engine, you'll know that you're operating a two-stroke engine when you are required to mix together the fuel and the oil.

So, you think you know enough about engines to ace this quiz? Let's get started.

1 of 30
Compared to lubricating oil, two-cycle oil has less …
2 of 30
How many strokes do these engines require to complete a power cycle?
3 of 30
How many revolutions does the crankshaft make during a power cycle in a two-stroke engine?
4 of 30
What color is the smoke emitted from many small two-stroke engines?
5 of 30
What year was the first two-stroke engine (with in-cylinder compression) patented?
6 of 30
Clerk's engine was the first to do what during every revolution of the crankshaft?
7 of 30
Compared to four-stroke engines, two-stroke engines tend to have what?
8 of 30
In a two-stroke engine, at the start of a new stroke, both the inlet and exhaust ports are …
9 of 30
Who created the first practical two-stroke motorcycles?
10 of 30
What is another name for the oil/gas mixture in a two-stroke engine?
11 of 30
When compared to four-stroke engines, how many parts do two-stroke engines contain?
12 of 30
What is a typical compression ratio for a small two-stroke engine?
13 of 30
What is a typical compression ratio for a small four-stroke engine?
14 of 30
How many times does the spark plug fire for each revolution of the crankshaft in a two-stroke engine?
15 of 30
What kind of ignition do most two-cycle engines use?
16 of 30
True or false: Compared to four-stroke engines, two-stroke engines have a shorter service life.
18 of 30
Compared to four-stroke engines, what are the characteristics of emissions from small two-stroke engines?
19 of 30
Two-stroke engine oil is also known as …
20 of 30
What is a primary trait of the new two-stroke engine that Honda unveiled in 2015?
21 of 30
What is the most common type of inlet port on smaller two-stroke engines?
22 of 30
For small two-stroke engines, how many ounces of two-stroke oil do you need per gallon (4 liters) of gas?
23 of 30
How do the lubrication systems on large two-stroke engines work as compared to large four-stroke engines?
24 of 30
True or false: Two-stroke engines typically don't last as long as four-stroke engines
25 of 30
What is the name for the upward stroke of a two-stroke engine?
26 of 30
Why are two-stroke outboard engines (for boats) NOT environmentally friendly?
27 of 30
In a small two-cycle engines, where does the oil originate?
28 of 30
True or false: You usually get more miles per gallon on a two-stroke engine than on a four-stroke engine.
29 of 30
Compared to four-stroke engines, how efficient are the enormous two-stroke diesel engines used on ships?
30 of 30
What characteristic is typical of a two-stroke motorcycle's power band?
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