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Diesel Engines Questions & answers
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Diesel Engines Questions & answers
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DieselEngines
B
-
ANS-Based
on
ABYC
standards,
minimum
spacing
between
hull
vent
openings
and
fuel
fill
or
vent
fittings
should
be:
A.
9
inches
B.
15
inches
C.
24
inches
D.
36
inches
D
-
ANS-The
thermal
efficiency
of
a
diesel
engine
is
such
that
typical
heat
converted
to
useful
power
is
approximately
_______%
of
the
total
heat
A.
22
B.
45
C.
15
D.
36
A
-
ANS-One
of
the
primary
differences
between
the
gasoline-filed
engine
four
stroke
cycle
and
the
diesel
four-stroke
cycle
is:
A.
the
intake
stroke
only
brings
air
into
the
cylinder
B.
The
compression
ratio
of
the
diesel
engine
is
much
lower
than
the
same
sized
gasoline
engine
C.
Fuel
gets
atomized
by
the
high
heat
with
a
diesel
engine
D.
The
diesel
fuel
is
more
volatile
than
the
gasoline
C
-
ANS-Temperature
controlled
engine
room
exhaust
blowers
in
diesel
powered
boat
are
primarily
used
to:
A.
heat
the
boats
cabin
B.
ventilate
the
boats
fire
suppression
system
C.
lower
engine
room
temperatures
D.
reduce
exhaust
back
pressure
B
-
ANS-With
some
diesels
there
may
be
a
need
to
________
incoming
air
to
the
combustion
chambers
to
assist
in
cold
starting
A.
Pressurize
B.
heat
C.
humidify
D.
atomize D
-
ANS-In
setting
up
a
piping
system
for
exhaust
gases,
the
number
of
sharp
bends
should
be
kept
to
a
minimum
to
A.
raise
exhaust
gas
temperature
B.
permit
use
of
a
larger
diameter
pipe
C.
eliminate
the
need
for
a
silencer
D.
prevent
excessive
exhaust
back-pressure
D
-
ANS-Which
of
the
following
does
not
have
requirements
that
apply
to
exhaust
components
and
hose
types?
A.
UL
1129
B.
SAE
J2006
C.
ABYC
P-1
D.
US
Coast
Guard
A
-
ANS-Which
of
the
following
is
the
most
likely
exhaust
related
cause
for
excessive
engine
operating
temperature?
A.
exhaust
elbows
that
are
old
and
clogged
B.
delaminated
exhaust
hose
C.
oversized
exhaust
system
D.
underwater
exhaust
outlet
C
-
ANS-An
engine
equipped
with
an
exhaust-mixing
elbow
is
installed
below
the
waterline.
What
device
must
be
installed
in
the
raw
water
discharge
hose
ahead
of
the
mixing
elbow.
A.
manometer
B.
Flow
diverter
C.
siphon
break
D.
flapper
valve
A
-
ANS-Upon
inspection
of
the
wet
exhaust
system.
the
tech
notices
that
the
exhaust
hose
is
burned
near
the
elbow.
Tech
A
says
that
replacing
the
hose
will
correct
the
problem.
Tech
B
says
that
the
problem
is
most
likely
with
the
cooling
system.
Which
tech
is
correct?
A.
Tech
B
B.
Tech
A
C.
Both
Techs
are
correct
D.
Neither
Tech
is
correct
A
-
ANS-If
you
do
not
refill
the
raw
water
system
with
a
winterizing
solution
for
long-term
storage
after
draining
the
seawater,
the
system
is
prone
to:
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