Powertrains final exam 2023 with complete solution
technician b only
Technician A says that when making a 5-6 upshift on a 10-speed transmission, the
gearshift lever should be moved into the sixth gear position before flipping the range
control button into high range. Technician B says that when making a 6-5 downshift on
a 10-speed transmission, the range control button should be flipped into low range
before the gearshift lever is moved into the fifth gear position. Who is correct?
a. Technician A only
b. Technician B only
c. Both A and B
d. Neither A nor B
500,000 miles
What is the recommended transmission oil change interval when Eaton E-500 lubricant
is used in a linehaul truck application?
a. 500,000 miles
b. 5,000,000 miles
c. 500 miles
d. 50,000 miles
both a and b
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
all of the above
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
smooth shifts into first and reverse
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
fully depressed
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. depressed as far as clutch brake engagement
b. fully depressed
c. depressed far enough to remove the free play
d. fully released
low oil level
What is the most likely cause of a failed transmission bearing with noticeable
discoloration?
a. fatigue
b. fretting
c. dirt
d. low oil level
both technicians a and b
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
70 inches
What is usually considered to be the maximum recommended length for a single-piece
driveshaft operating at speeds of 3,000 rpm?
a. 90 inches
b. 50 inches
c. 95 inches
d. 70 inches
coasting
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. skip-shifting
c. riding the clutch pedal
d. starting in an incorrect gear
dampened disc with ceramic facings
Which type of clutch discs would best suit a linehaul truck with a high torque rise
engine?
a. dampened disc with organic facings
b. dampened disc with ceramic facings
c. rigid disc with asbestos facings
d. rigid disc with ceramic facings
1 inch
, Which of the following dimensions is regarded as being correct for clutch brake squeeze
at the clutch pedal?
a. 2 1/2 inches
b. 1 inch
c. 2 inches
d. 1 1/2 inches
all of the above
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
none of the above
On a typical truck twin countershaft transmission, which of the following components
would have to be removed to replace a damaged input shaft?
a. shift bar housing
b. auxiliary section
c. mainshaft
d. none of the above
all of the above
When attempting to identify the source of contaminants in transmission lube, which of
the following are possible?
a. seals
b. breather
c. dirty lubricant storage containers
d. all of the above
all of the above
What is the function of synchronizers in a truck transmission?
a. bring the rotational speed of two rotating components to a single speed
b. locks two rotating components together
c. reduce gear clashing
d. all of the above
50,000-100,000 linehaul miles
When a mineral-based transmission lubricant is used which of the following would be
the usual recommended oil change interval under normal operating conditions?
a. 100,000-150,00 linehaul miles
b. 30,000- 40,000 linehaul miles
c. 50,000-100,000 linehaul miles
d. 250,000 linehaul miles
technician b only
Technician A says that when making a 5-6 upshift on a 10-speed transmission, the
gearshift lever should be moved into the sixth gear position before flipping the range
control button into high range. Technician B says that when making a 6-5 downshift on
a 10-speed transmission, the range control button should be flipped into low range
before the gearshift lever is moved into the fifth gear position. Who is correct?
a. Technician A only
b. Technician B only
c. Both A and B
d. Neither A nor B
500,000 miles
What is the recommended transmission oil change interval when Eaton E-500 lubricant
is used in a linehaul truck application?
a. 500,000 miles
b. 5,000,000 miles
c. 500 miles
d. 50,000 miles
both a and b
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
all of the above
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
smooth shifts into first and reverse
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
fully depressed
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. depressed as far as clutch brake engagement
b. fully depressed
c. depressed far enough to remove the free play
d. fully released
low oil level
What is the most likely cause of a failed transmission bearing with noticeable
discoloration?
a. fatigue
b. fretting
c. dirt
d. low oil level
both technicians a and b
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
70 inches
What is usually considered to be the maximum recommended length for a single-piece
driveshaft operating at speeds of 3,000 rpm?
a. 90 inches
b. 50 inches
c. 95 inches
d. 70 inches
coasting
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. skip-shifting
c. riding the clutch pedal
d. starting in an incorrect gear
dampened disc with ceramic facings
Which type of clutch discs would best suit a linehaul truck with a high torque rise
engine?
a. dampened disc with organic facings
b. dampened disc with ceramic facings
c. rigid disc with asbestos facings
d. rigid disc with ceramic facings
1 inch
, Which of the following dimensions is regarded as being correct for clutch brake squeeze
at the clutch pedal?
a. 2 1/2 inches
b. 1 inch
c. 2 inches
d. 1 1/2 inches
all of the above
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
none of the above
On a typical truck twin countershaft transmission, which of the following components
would have to be removed to replace a damaged input shaft?
a. shift bar housing
b. auxiliary section
c. mainshaft
d. none of the above
all of the above
When attempting to identify the source of contaminants in transmission lube, which of
the following are possible?
a. seals
b. breather
c. dirty lubricant storage containers
d. all of the above
all of the above
What is the function of synchronizers in a truck transmission?
a. bring the rotational speed of two rotating components to a single speed
b. locks two rotating components together
c. reduce gear clashing
d. all of the above
50,000-100,000 linehaul miles
When a mineral-based transmission lubricant is used which of the following would be
the usual recommended oil change interval under normal operating conditions?
a. 100,000-150,00 linehaul miles
b. 30,000- 40,000 linehaul miles
c. 50,000-100,000 linehaul miles
d. 250,000 linehaul miles
