Free EETC Two-Stroke Engines Questions and Answers

Question 1

Why do two-stroke engines typically produce more emissions compared to four-stroke engines?

Accepted Answer

Two-stroke oil and loss of air-fuel mixture through the exhaust port

Answer

They use more fuel per cycle

Answer

The combustion chamber is larger

Answer

They operate at higher temperatures

Question 2

Why do two-stroke engines generally cost less to manufacture compared to four-stroke engines?

Accepted Answer

They have fewer parts

Answer

They are made from cheaper materials

Answer

They require less precision in manufacturing

Answer

They operate more efficiently

Question 3

In what positions can a two-stroke leaf blower operate effectively?

Accepted Answer

Any position

Answer

Upright only

Answer

Horizontal only

Answer

Upside down only

Question 4

On a two-stroke engine, the crankshaft turns how many degrees to complete one full cycle:

Accepted Answer

360 degrees

Answer

180 degrees

Answer

270 degrees

Answer

720 degrees

Question 5

A two-stroke engine has a power stroke once _______.

Accepted Answer

every full revolution

Answer

every half revolution

Answer

every two revolutions

Answer

every three revolutions

Question 6

A two-stroke engine uses ________ fuel than a four-stroke engine.

Accepted Answer

more

Answer

less

Answer

the same amount of

Answer

variable amounts of

Question 7

What purpose does the shape of a two-stroke piston serve?

Accepted Answer

Helps keep the air-fuel mixture from going straight out the exhaust and aids in expelling exhaust gases, a process called scavenging

Answer

Reduces engine noise

Answer

Increases compression ratio

Answer

Decreases fuel consumption

Question 8

Why is it not advisable to perform a leak-down test on a two-stroke engine?

Accepted Answer

You can damage the crank seals

Answer

It can lead to incorrect compression readings

Answer

It may damage the piston rings

Answer

It can cause the engine to flood

Question 9

What are the two benefits of a two-stroke engine design?

Accepted Answer

Lightweight and smaller size

Answer

Higher fuel efficiency and lower emissions

Answer

Longer lifespan and reduced maintenance requirements

Answer

Quieter operation and smoother performance

Question 10

What are the two disadvantages of a two-stroke engine?

Accepted Answer

More noise and greater emissions

Answer

Higher maintenance costs and lower power output

Answer

Reduced fuel efficiency and shorter lifespan

Answer

Limited torque and larger size