2-38.
Which of the following defects
does NOT warrant valve spring
replacement?
1.
Loss of 2 percent of length
2.
Damage to protective coating
3.
Hairline cracks
4.
Rust pits
2-39.
Which of the following results
will occur if shims are not
properly placed between a valve
stem and valve stem cap?
1.
Damaged valve stem cap
2.
Damaged or broken valve stem
3.
Dropped valve
4.
Each of the above
2-40.
What is the most important factor
in keeping a properly adjusted
valve actuating gear in good
condition?
1.
Minimum clearance
2.
Control of corrosion
3.
Proper materials
4.
Adequate lubrication
2-41.
If the threads on a rocker arm
adjusting screw become worn, what
must you do?
1.
Replace the rocker arm, screw,
and locknut
2.
Replace the screw only
3.
Replace the screw and locknut
only
4.
Dress the threads on the screw
2-42.
To adjust the tappet to the intake
valve of a 4-stroke cycle engine,
the piston must be in what
position?
1.
On the intake stroke
2.
On the compression stroke
3.
Between the compression and
power strokes
4.
Between the intake and
compression strokes
2-43.
What is the most frequent
maintenance requirement for rocker
arms?
1.
Reaming the bushings in the
rocker arms
2.
Inspecting the rocker arm ends
for wear
3.
Checking tappet clearances and
locknut tightness
4.
Replacing tappet adjusting
screws and locknuts
2-44.
After setting a tappet clearance
and locking the adjusting screw
with the locknut, what is your
next step?
1.
Recheck the clearance
2.
Adjust the next tappet
3.
Warm the engine up and reset
the clearance
4.
Check the manufacturer's
manual to see if the clearance
is correct
2-45.
When a lash adjuster is adequately
supplied with oil, what will most
likely cause it to operate
noisily?
1.
Excessive clearance
2.
Broken parts
3.
Dirt,resin, or abrasive
particles
4.
Missing check ball or spring
2-46.
Which of the following actions
should you take to insert a
camshaft into the camshaft recess?
1.
Rotate it as you push it in
2.
Shake it up and down
3.
Apply grease to it
4.
Hit it with a sledge
2-47.
Why is it necessary to scrape
around the top of a cylinder bore
before pulling the piston?
1.
To remove any metal ridges and
carbon deposits
2.
To increase clearance for the
piston
3.
To remove abrasive particles
and gum
4.
To free the piston rings
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