Diesel
Engine
Certification
ABYC
-
Basic
Diesel
Principles
and
Exhaust
Systems
A
gasoline
engine
is
(x)
ignition
-
ANS-Spark
A
diesel
engine
is
(x)
ignition
-
ANS-Compression
True
or
false:
the
words
stroke
and
cycle
mean
the
same
thing
-
ANS-true
Fuel
injection
is
also
known
as
the
(x)
cycle
-
ANS-power
stroke
A
(x)
engine,
the
intake
stroke
is
only
bringing
AIR
into
the
cylinder
-
ANS-Diesel
Engine
A
(x)
engine,
a
FUEL/AIR
mixture
is
being
brought
into
the
cylinder
-
ANS-Gasoline
Engine
What
is
the
term
for
how
heat
is
dealt
with
as
a
byproduct
of
combustion?
-
ANS-Thermal
Efficiency
How
much
more
efficient
(in
terms
of
thermal
efficiency)
is
a
diesel
engine
than
a
gasoline
engine?
-
ANS-10-15%
more
Which
is
more
efficient
(in
terms
of
thermal
efficiency),
a
4-stroke
or
2-stroke
diesel
engine?
-
ANS-4-stroke
Which
type
(diesel
vs.
gasoline)
of
engine
requires
more
air?
-
ANS-A
diesel
consumes
5-6
times
more
Is
air
more
dense
when
it
is
cool
or
warm?
-
ANS-Cooler
air
is
more
dense
Cooler
air
=
more
dense
=
which
means
more
or
less
oxygen
rich
air?
-
ANS-Cooler
air
is
more
oxygen
rich
(which
is
what
diesel
engines
like)
What
are
the
signs
of
air
shortage
to
a
diesel
engine?
-
ANS-1.
black
soot
2.
smoke
from
the
exhaust
Without
air
filtration,
particulate
matter
which
cause
(x)
to
the
piston
and
cylinder
-
ANS-Excessive
/
accelerated
wear
What
is
the
one
exception
to
when
a
diesel
engine
does
not
momentarily
benefit
from
cool
air?
-
ANS-During
cold
start
assist
(diesels
prefer
some
pre-heating
to
assist
their
start
up)
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