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1. Which of the following descriptions best describes the older Allison CEC family of electronically-managed
transmissions?
a.
full-authority, electronically-managed
b.
partial-authority, electronically managed
c.
full-authority, hydromechanically-controlled
d.
partial-authority electronics using an all-new modular gearset platform
b
2. What is used to signal accelerator position to an Allison ECAT electronics?
a.
analog potentiometer type TPS
b.
digital Hall-effect TPS
c.
governor feedback signal
d.
either A or B
d
3. Which of the folowing is a full-authority ECAT?
a.
Allison WT
b.
Allison TC
c.
Caterpillar CX
d.
All of the above
b
4. What is the minimum number of planetary gearsets used in an Allison WT transmission?
a.
One
b.
Two
c.
Three
d.
Four
5. What is the minimum number of planetary gearsets used in a Caterpillar CX ECAT?
a.
One
b.
Two
c.
Three
d.
Four
6. Which of the following true statements is true regarding solenoid operation in an Allison ECATs?
a.
non-latching solenoids permit hydraulic flow only when electrically energized
b.
latching solenoids can be switched with either straight or reversed polarity
c.
latching solenoids replace the shift signal valves used in non-electronic transmissions
d.
all of the above
d
7. How many planetary gearsets are there in an Allison TC10 ECAT?
a.
None
b.
One
c.
Two
d.
Three
b
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8. Which of the following is generally true of a non-latching solenoid?
a.
spring-loaded to a default off position
b.
spring-loaded to a default on position
c.
blocks oil flow when energized
d.
modulates oil flow when not energized
9. What is the source address (SA) of the transmission ECU on the J1939 data bus?
a.
00
b.
01
c.
02
d.
03
d
10. A solenoid that requires a momentary voltage source to change position, then holds position and requires reverse
current pulse to revert to its original position known as?
a.
Latching solenoid
b.
Non-latching solenoid
c.
pulse actuator
d.
induction sensor
11. When does an Allision WT transmission use fast adaptive mode?
a.
when it has close-ratio gearing
b.
when it has standard gear ratios
c.
when programmed to do so after a rebuild
d.
whenever hard acceleration is required
12. Which of these clutches puts an Allison WT drop-box into extra-low range?
a.
C4
b.
C5
c.
C6
d.
C7
13. When Allison WT drop-box output is split between the front and rear axles, how much of the available torque would
normally go to the front axle?
a.
70%
b.
600%
c.
50%
d.
30%
d
14. Which of the following Allison WT clutches are designed to transmit rotating torque to the planetary gears?
a.
C1 and C2
b.
C2 and C3
c.
C3 and C4
d.
C6 and C7
15. Which of the following WT clutches are designed to hold at least one member of a planetary gearset stationary?
a.
C1 and C3
b.
C2 and C4
c.
C3, C4, and C5
d.
C2, C3, and C5
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16. When ordering parts for any WT transmission, what information must be communicated accurately to identify the
transmission?
a.
vehicle OEM, model, and year of manufacture
b.
all 17 characters from the vehicle VIN
c.
transmission model, serial, and part numbers
d.
transmission model and the date placed in service
17. Technician A says that an Allison TC10 splits input torque between a pair of countershafts. Technician B says that it is
possible to transmit output torque from a TC10 bypassing the gearbox module. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
b
18. Which of the following terms are used by Allison to describe the solenoids used in WT controls?
a.
latching and non-latching
b.
normally-open and normally-closed
c.
fast-adaptive and slow-adaptive
d.
energized-to–run and energized-to-unlatch
b
19. Which of the following statements accurately describe primary and secondary modulation of solenoids in a WT
transmission?
a.
primary modulation controls on-time at a frequency of 63 Hz
b.
secondary modulation maintains an optimal current flow at 7,812 Hz
c.
primary modulation has a variable duty cycle
d.
all of the above
d
20. Which of the following are advantages of using secondary submodulation of solenoids?
a.
heat in the solenoid coil is minimized
b.
solenoid performance is more consistent during operating variables
c.
both A and B
d.
neither A nor B
21. What is indicated when the WT Digital Display is showing a flashing 3?
a.
transmission is about to shift into range 3
b.
transmission is in range 3 awaiting either an upshift or downshift
c.
trouble code 3 has been set in the ECU fault log
d.
shift will occur in 3 seconds
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22. How is the PTO mode in an Allison World Transmission managed?
a.
activated by the operator
b.
managed by the ECU
c.
may be continuous whenever there is transmission input
d.
any of the above
d
23. In which of the three Allison TC10 modules is a single planetary gearset located?
a.
Torque conveter module
b.
Input module
c.
Gearbox module
d.
Output module
d
24. After the maximum number of codes are logged in a WT ECU, what happens to new codes that are detected?
a.
added and the oldest non-active code is dropped
b.
if all codes are active, the lowest-priority code is dropped
c.
new code cannot be added until existing codes are retrieved
d.
both A and B
d
25. How many clutches must be applied for a WT transmission to operate in either forward or reverse?
a.
1
b.
2
c.
3
d.
4
b
26. In the event of a total loss of electrical supply to a World Transmission, what would result?
a.
cease to function
b.
revert to hydromechanical operation
c.
default to limp home mode
d.
both B and C
d
27. How many solenoids are energized in a WT transmission when it is in neutral?
a.
none
b.
1
c.
2
d.
3
d
28. How many ranges are overdrive ratios in a 6-speed World Transmission?
a.
none
b.
1
c.
2
d.
3
29. When input torque is managed to bypass both countershafts in an Allison TC10 transmission, which of the following
gear ratios would it be operating in?
a.
First
b.
Second
c.
Fourth
d.
Fifth
b
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ANSWER:
c
30. Technician A says that the WT mainshaft is splined to the rotating clutch module. Technician B says that the
mainshaft connects all three planetary gearsets in a WT transmission. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
ANSWER:
c
31. Technician A says that when the WT digital display (DD) is blank, the reason could be a problem in the electrical
circuit to the shift selector. Technician B says that when the WT DD is blank, the data link may have failed. Who is
correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
32. Which of the following best describes the function of the Allison WT serial communications interface (SCI)?
a.
enables one-way J1939 bus communications
b.
enables two-way J1939 bus communications
c.
connects WT ECU directly to digital display (DD)
d.
connects WT ECU directly to a digital diagnostic reader (DDR)
ANSWER:
b
33. Which of the following are serial communications interface (SCI) inputs to the WT electronics?
a.
transmission tailshaft speed
b.
transmission sump temperature
c.
throttle position
d.
range position
34. Which of the following are serial communications interface (SCI) outputs from the WT ECU?
a.
cruise control status
b.
road speed limit status
c.
kickdown signal
d.
transmission output speed
ANSWER:
d
35. Technician A says that Allison recommend the use of TranSynd in ECATs. Technician B says that Dexron is no
longer approved for use in WT transmissions. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
ANSWER:
a
36. When TranSynd synthetic oil is used in ECATs, Allison state that the oil change intervals can be extended by ____
times.
a.
one: treat as Dexron
b.
two
c.
four
d.
five
ANSWER:
c
37. Technician A says that a Caterpillar ADEM controller module is used to manage the CX family of Caterpillar on-
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highway transmissions. Technician B says the reprogramming, calibration, and troubleshooting software required for
Caterpillar CX transmission is ET. Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
38. How many forward ratios are there in a Caterpillar CX35 vocational transmission?
a.
four
b.
five
c.
six
d.
eight
d
39. How many forward ratios are there in a Caterpillar CX28 transmission
a.
four
b.
five
c.
six
d.
continuously variable
40. What lubricant do Caterpillar recommend for use in their CX family of onhighway transmissions?
a.
synthetic E-500
b.
Dexron II
c.
Dexron III
d.
synthetic AT-1
d
41. Where is the main pressure tap located on a Caterpillar CX transmission?
a.
filter pad housing
b.
ECPC valve housing
c.
shift tower
d.
ECU heat sink
42. What type of fluid level sensor is used to signal sump level on a Caterpillar CX transmission?
a.
rheostat variable resistor float
b.
potentiometer
c.
optical
d.
Hall-effect
d
43. Which of the following pressure values would be within specification for main pressure in a Caterpillar CX
transmission?
a.
125 psi
b.
250 psi
c.
350 psi
d.
700 psi
44. Technician A says that the ECPC valves used on Caterpillar CX transmissions are PWM controlled. Technician B
says that Caterpillar CX transmission hydraulic troubleshooting is facilitated by pressure taps located at key points in the
hydraulic circuit Who is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
45. What effects clutch control in a Caterpillar CX transmission?
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a.
non-latching solenoids
b.
latching solenoids
c.
PWM actuated ECPCs
d.
V-Ref
46. Technician A says that a Caterpillar CX transmission should be recalibrated each time the ECPCs are serviced.
Technician B says that in order to recalibrate a Caterpillar CX transmission, Caterpillar ET and a road test are required.
Who is correct?
a.
Technician A only
b.
Technican B only
c.
Both A and B
d.
Neither A nor B
47. Which of the following correctly describes the two output options of the output module on the Allison TC-10?
a.
low range and direct drive
b.
underdrive and overdrive
c.
low range and high range
d.
deep reduction and low reduction
48. On an Allison TC10, what do the 4th and 9th ratio options have in common?
a.
torque is split evenly though the countershafts
b.
torque is multiplied through the countershafts
c.
torque is routed through the left countershaft
d.
input torque bypasses both countershafts to the output module
d
49. How many reverse ratios are there in an Allison TC10?
a.
One
b.
Two
c.
Five
d.
Ten
b
50. How many forward ratios are there in an Allison TC10?
a.
Five
b.
Ten
c.
Twelve
d.
Twenty
b
51. What is required to access DTCs in an Allison ECAT?
a.
ET
b.
DMM
c.
DDD
d.
DOC
d
52. When using a DMM in resistance mode across terminals Cand D on a 9-pin J1939 receptacle, 40 ohms is displayed on
the meter. Which of the following is most likely?
a.
One missing terminating resistor
b.
Both terminating resistors missing
c.
Three terminating resistors on the bus
d.
The bus is down
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53. Which of the following should be true of a powershift transmission?
a.
shifts under full acceleration without breaking driveline torque
b.
zero slip loss during ratio upshifts
c.
lower skill level required of driver
d.
all of the above
54. What is used to manage main pressure in an ECAT?
a.
main pressure regualator
b.
modulator valve
c.
governor valve
d.
backfill valve
55. What is used to manage variable bleed proportioning solenoids?
a.
V-Bat
b.
V-Ref
c.
main pressure
d.
PWM signal
56. What Allison software component can be used to identify a transmission problem before it results in an actual
breakdown?
a.
DTCs
b.
prognostics
c.
audit trail
d.
adaptive logic
57. Technician A says that the Allison TC10 gearbox module does not require the use of synchromizers because all of the
gears rotate in the same direction. Technician B says that both countershafts in the TC10 rotate in the same direction. Who
is correct?
a.
Technician A only
b.
Technician B only
c.
Both A and B
d.
Neither A nor B
b