PRINCIPLES OF GASOLINE/DIESEL FUEL SYSTEMS - OD1620 - LESSON 1/PE 1
PRACTICAL EXERCISE 1
1.
Instructions
On a plain piece of paper, respond to the requirements listed below.
2.
Answer these questions regarding the characteristics of gasoline.
a.
Gasoline is the most popular petroleum based engine fuel.
Gasoline
contains two elements in such proportion that they will burn freely in air
and liberate heat energy. What is the name of these two elements?
b.
There are three major characteristics of gasoline that affect engine
operation, one of which is volatility.
Name the remaining two
characteristics.
c.
When fuel that is not vaporized leaks past the piston rings and seeps
into the crankcase, it is commonly referred to as ____________________.
d.
Describe how an engine will function when the fuel is not distributed
evenly to all cylinders?
e.
What is added to gasoline that mixes with the moisture and acts as
antifreeze to prevent freezing?
f.
The normal combustion process in the combustion chamber goes through
three stages the first of which is the formation of the nucleus of flame.
What are the remaining two stages?
g.
During what stage, in the combustion process, will detonation take
place.
h.
The ability of
a
fuel
to
resist
detonation
is
measured
by
its
____________________.
i.
What is the compound that is added to gasoline to raise its octane
rating?
j.
Explain how preignition happens during compression within an engine.
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