Name:
Class:
Date:
1. When installing a 15 1/2-inch clutch assembly, Technician A uses guide studs installed in the flywheel to support the
weight. Technician B uses a splined pilot shaft when installing both 14- and 15 1/2-inch clutch assemblies. Who is
correct?
a.
Technician A
b.
Technician B
c.
Both Technicians A and B
d.
Neither Technician A nor B
2. Technician A says that most vocational trucks use rigid friction discs. Technician B says that coaxial spring friction
discs are better at absorbing torsional shock loads. Who is right?
a.
Technician A
b.
Technician B
c.
Both Technicians A and B
d.
Neither Technician A nor B
b
3. Which of the following is the drive side of a clutch pack assembly?
a.
flywheel
b.
intermediate plate
c.
clutch cover
d.
all of the above
4. Which of the following dimensions is within the specified clutch pedal freeplay dimension measured at the pedal?
a.
1 inch
b.
1 3/4 inches
c.
2 1/4 inches
d.
2 3/4 inches
5. Which of the following dimensions is regarded as being correct for clutch brake squeeze at the clutch pedal?
a.
1 inch
b.
1 1/2 inches
c.
2 inches
d.
2 1/2 inches
6. Which of the following could cause clutch hang-up?
a.
insufficient free travel
b.
misaligned intermediate plate drive pins
c.
seized throw-out bearing
d.
stretched clutch linkage rod
b
7. Which of the following driving practices can cause abnormal wear to clutch components?
a.
standing starts in high gear ratios
b.
riding the clutch pedal
c.
using the clutch to hold a truck on an incline
d.
all of the above
8. What is the function of coaxial springs in a clutch friction plate?
a.
dampening of driveline torsionals
b.
dampening of engine torsionals
c.
reducing clutch chatter
d.
all of the above
Name:
Class:
Date:
d
9. As clutch friction facings wear on a truck pull-type clutch, how is clutch pedal free travel affected?
a.
decreases
b.
increases
c.
unaffected
10. How is the intermediate plate driven in a two-plate clutch assembly?
a.
notches around the circumference that engage to flywheel drive pins
b.
external tangs that fit into notches in the clutch cover
c.
both A and B
d.
neither A nor B
11. Which type of clutch discs would best suit a linehaul truck with a high torque rise engine?
a.
dampened disc with organic facings
b.
rigid disc with ceramic facings
c.
dampened disc with ceramic facings
d.
rigid disc with asbestos facings
12. What is the function of the clutch brake?
a.
smooth shifts into first and reverse
b.
assist the vehicle foundation brakes
c.
smooth downshifts from high to low
d.
all of the above
13. What is generally considered to be the major cause of clutch failure?
a.
excess heat
b.
excess vibration
c.
lack of lubrication
d.
all of the above
14. What is recommended advice for selecting the appropriate starting gear?
a.
use the lowest gear ratio to start moving
b.
select a gear ratio that allows you to start moving with the engine at idle rpm
c.
select the highest gear in deep reduction range
d.
use the lowest gear in high range
b
15. Clutch facing wear has resulted in zero clutch pedal free travel in a truck equipped with a manually adjustable, pull-
type clutch. Which of the following is the recommended method of restoring clutch pedal free travel to specification?
a.
move the internal adjusting ring 6 to 8 notches clockwise
b.
move the internal adjuster ring 6 to 8 notches counterclockwise
c.
lengthen the external linkage rod 1/8 inch (3 mm)
d.
shorten the external linkage rod 1/8 inch (3 mm)
16. Which type of clutch pressure plate design provides a constant plate load as the friction faces wear?
Name:
Class:
Date:
a.
angle spring, pull-type
b.
diaphragm spring, pull-type clutch
c.
both A and B
d.
neither A nor B
17. Which of the following bad driving practices is the most likely cause for clutch facings to be “thrown off” the clutch
discs?
a.
coasting
b.
riding the clutch pedal
c.
starting in an incorrect gear
d.
skip-shifting
18. Where should the clutch pedal be positioned while the internal adjusting ring of a pull-type clutch is being turned
during a clutch adjustment?
a.
fully depressed
b.
fully released
c.
depressed as far as clutch brake engagement
d.
depressed far enough to remove the free play
19. Technician A says that clutch shaft pilot bearings should be replaced each time a clutch pack is replaced. Technician B
says that the pilot bearing should always be inspected when a clutch pack is replaced. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
20. Technician A says that bursting of clutch friction facings is often caused by coasting a truck with the clutch pedal
depressed. Technician B says that a clutch pressure plate with warpage sufficient to insert a 0.003 inch (0.08 mm)
thickness gauge under a straight edge must be replaced. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
21. Which of the following would most likely result if the intermediate plate drive pins in a pot type flywheel housing are
not properly aligned?
a.
clutch hangs-up on release
b.
clutch release forks bind
c.
release bearing grabs
d.
all of the above
22. Technician A says that one of advantages of a clutch brake is its ability to bring a vehicle to a halt at low speeds.
Technician B says most current clutch brakes are intended to smooth shifts from neutral to either first or reverse. Who is
correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
b
23. Technician A says that a clutch is fully disengaged when the pedal is all the way up. Technician B says a clutch is
released when the pedal is moved from full travel to the floor. Who is correct?
Name:
Class:
Date:
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
24. Which of the following dimensions would be a typical specified clearance between a release bearing and clutch cover
in a clutch pack using a clutch brake?
a.
1/4 inch (6 mm)
b.
1/2 inch (12 mm)
c.
3/4 inch (19 mm)
d.
1 inch (24 mm)
25. Which of the following dimensions would be the specified clearance between a release bearing and clutch cover in a
clutch pack with no clutch brake?
a.
1/4 inch (6 mm)
b.
1/2 inch (12 mm)
c.
3/4 inch (19 mm)
d.
1 inch (24 mm)
26. What should 1 1/2 to 2-inches of clutch free pedal produce in free travel between the clutch release yoke fingers and
the release bearing in a push type clutch?
a.
zero lash
b.
1/8 inch (3 mm)
c.
1/4 inch (6 mm)
d.
1/2 inch (12 mm)
27. Technician A says that coasting when a clutch is disengaged can cause engine overspeed. Technician B says that
coasting with a clutch disengaged can spin the driven discs at speeds as high as 10,000 rpm due to the multiplication of
drivetrain ratios. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
28. Technician A says that when a clutch brake is damaged by driver abuse, the transmission must be removed to install a
replacement clutch brake. Technician B says that a two-piece clutch brake can be used as a replacement for an integral
brake. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
29. Technician A says excessive clutch pedal free travel can result in a clutch that does not fully disengage. Technician B
says that too little free pedal travel can result in a slipping clutch. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
30. Where is a clutch (bell) housing flange face most susceptible to wear at its mating surface with the flywheel housing?
a.
between 10 and 2 o’clock
b.
6 o’clock
c.
between 3 and 8 o’clock
d.
12 o’clock
Name:
Class:
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31. What is required at PMI to maintain a Solo clutch through its service life?
a.
check wear indicator only
b.
lube release bearing only
c.
both A and B
d.
nothing, it is 100% maintenance-free
32. When the Urge-to-move feature is used on an Eaton Autoshift with an AW clutch, what hardware component in the
system makes this possible?
a.
planetary gearset
b.
torque converter
c.
slip synchros
d.
wet clutch
33. What is the function of the rollers used on some clutch release forks (yokes)?
a.
faster release
b.
extended fork life
c.
increases lube intervals
d.
less heat transfer to release bearing
34. Which of the following components can easily be modified for use as a pilot shaft for installing clutch assemblies?
a.
clutch fork shaft
b.
used transmission input shaft
c.
used axle stub
d.
transmission tailshaft
35. When you use a clutch installation pilot shaft to align a clutch in preparation for installation, which set of splines must
be aligned?
a.
clutch friction disc splines
b.
clutch shaft fork splines
c.
transmission input shaft splines
d.
engine mount splines
36. When installing a clutch pack assembly, at what point should you knock out the wood chocks that hold off pressure
plate spring pressure?
a.
before mounting clutch to the flywheel
b.
when pressure plate is bolted tight to the flywheel
c.
after installing the transmission
d.
final step before starting the engine
37. Technician A says that a Solo clutch should automatically adjust for the life of the clutch pack. Technician B says that
any clutch using a lockstrap to set the adjusting ring, must be periodically adjusted. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
38. Technician A says that center (intermediate) plate binding on its drive pins can cause clutch release problems on a 14–
inch clutch pack. Technician B says that it is a common shop practice to replace the friction facings on clutch discs when
they wear out. Who is correct?
Name:
Class:
Date:
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
39. Which of the following clutch pack components has to always rotate at the same speed as the engine flywheel?
a.
pilot bearing inner race
b.
release bearing
c.
pressure plate
d.
friction discs
40. Which of the following clutch pack components never rotates in operation?
a.
pressure plate
b.
pressure plate springs
c.
release bearing housing
d.
pilot bearing
41. Technician A says that automated manual transmissions (AMTs) no longer require clutches. Technican B says that
two-pedal AMTs have eliminated the clutch from the drivetrain. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
d
42. What does the acronym DM stand for?
a.
datalink mechanical
b.
direct modulated
c.
drive master
d.
driveline modulated
43. What determines the point at which a centrifugal clutch becomes fully engaged?
a.
road speed
b.
engine rpm
c.
clutch pedal position
d.
clutch shaft rpm
b
44. What is the creep feature of an Eaton wet clutch system known as?
a.
urge-to-move
b.
datalink mechanical
c.
slippage
d.
pneumatic actuation
45. In DM centrifugal clutch engagement, which phase occurs at the lowest rpm?
a.
launch
b.
touch-point
c.
stall-point
d.
powershift
b