all moduel test questions

Question 1

an auxiliary section that only has a range shift could have a gear ratio change from one shift to the next by how much %

Answer 1

30 to 40 %

Question 2

an auxiliary section that only has a splitter shift could have a gear ratio change from one shit to the next by how much %

Answer 2

15 to 20 %

Question 3

can a combination of range , splitter and deep reduction be used to provide the operator with many gear positions

Answer 3

yes

Question 4

why must the main supply line be properly routed and secure

Answer 4

to prevent damage from forgine objects and prevent becoming a moisture trap

Question 5

the air filter/regulator will generally regulate air to how much psi

Answer 5

58 to 63 psi

Question 6

is the master air control valve specific to each transmission

Answer 6

yes they need to match the speed of the transmission they are used on

Question 7

what is the pourpose of the slave valve

Answer 7

the slave valve allows the operator to pre select the range shift by inhibiting the shift until the main section is in neutral

Question 8

while the main section is in gear what keeps the slave pistion from moving

Answer 8

the actuating pin

Question 9

what is the range cylinder and how is it shifted

Answer 9

the range cylinder is a double acting cylinder that uses air to shift in both directions

Question 10

the splitter/deep reduction air cylinder is shifted when

Answer 10

air from the filter/regulator is directed to, or exhausted from the back side of the piston

Question 11

how are the plastic air lines used in multiple countershaft transmissions connected and where do they carry air

Answer 11

they are connected with furrule/insert type fittings and they carry air to the master control valve and the slave and/or the spool valve

Question 12

why do the rubber coated cloth braid hoses carry a large volume of air

Answer 12

to quickly complete the range shift

Question 13

why would a manufacturer develop a semi-automatic transmission where only the top two gears are automatically selected

Answer 13

the top two gears are the most used so having them shifted automatically reduces operator workload considerably

Question 14

on the semi-automatic transmissions the electronically controlled shift system is controlled by the

Answer 14

engine electronic control unit

Question 15

why is the semi-automatic transmission left in the high splitter position when it is shifted into the auto position

Answer 15

makes it easier for the operator when shifting out of the auto position back into 7th

Question 16

what are some of the system components used in the electronic controlled shift systems

Answer 16

shift controller

visusual display pannel

trasnmission controller (ecu)

X - Y shifter ( main section electric shift assembly)

shaft speed sensors

range and/or splitter assembly

inertia brake

wiring harness

Question 17

the transmission shift controller contains

Answer 17

operator shift console and dash display

Question 18

the dash display is an that output divice that informs the operator of the state of the shifting process by the use of what

Answer 18

arrows

numbers

letters

Question 19

what component is resonsible for all of the transmission shifting operations

Answer 19

transmission controller

Question 20

when signalled by the transmission controller how will the rail motor move the shift finger

Answer 20

along the shift shaft to the desired shift rail through a slotted conecttion between the rail nut and shift finger

Question 21

the range and splitter shifting is done through the

Answer 21

electronicall controled electric over air solenoids

Question 22

what is the purpose of the inertia brake

Answer 22

increase the rate of deceleration of the countershafts

Question 23

what mode must the operator select to have manual control over both upshifting and downshifting

Answer 23

hold

Question 24

what mode would the operator use to get maximum engine braking

Answer 24

low

Question 25

whenerver the vehicle is shut down what will the shift controller and the transmission controller do

Answer 25

they will not power down imediatly but go through a shutdown procedure placing the transmission in neutral

Question 26

what prevents the vehicle from being started without first verifying the transmission is in neutral

Answer 26

the start enable relay used by the automated transmission

Question 27

during normal operation in DRIVE the shift controller co-ordinates the shift by communicating with ?

Answer 27

the transmission controller and the engine ECU

Question 28

if operating conditions of the transmission change what dose the automated transmission have the ability to do

Answer 28

learn and adapt the shift points as the vehicle load conditions change . the operator can help the electronic contol system learn to use new shift points during the shifting process

Question 29

what are the three data links used in the automated transmission electronic system

Answer 29

proprietary data link SAE standard j-1939 SAE standard j-1587

Question 30

what are the three ways a diagnostic fault can be retrived

Answer 30

service warning light on the shift console scan tools PC based diagnostic equipment

Question 31

why should the transmission never be left in nuetral while thge truck is coasting

Answer 31

because the truck may gain to much speed and the electronic contol system may not be able to get the transmission back into gear

Question 32

what are the three functions of a transmission

Answer 32

to multiply torque from the engine to reverse the direction of torque delivery and to provide an interruption in torque while the clutch is still engauged

Question 33

what is the formula for calculating gear ratio

Answer 33

number of driven teeth divided by number of drive teeth

Question 34

can an engine that developes high torque over several hundred rpm be coupled with a transmission that has fewer gears

Answer 34

yes

Question 35

how should transmissions be matched to a vehicle

Answer 35

transmission gearing and torque handeling capacities should be matched to each vehicles normal operating conditions

Question 36

what are the two functions of the synchronizer assembly

Answer 36

to match or synchronize the speed of a mainshaft gear with the speed of the mainshaft during the shifting process to temporarily connect a selected mainshaft gear to the mainshaft once the speeds of the maiting parts have been synchronized

Question 37

what are the three types of synchronizer assemblies used

Answer 37

block type pin type plate and disc

Question 38

multiple countershaft transmissions can only have two countershafts

Answer 38

no some transmissions can have up to three

Question 39

what are some advantages to multiple countershaft transmissions

Answer 39

smaller and lighter floating design eliminates the need for bearings between the mainshaft and mainshaft gears smaller gears can be used and cheaper spur cut gears can be used eliminating the need for thrust control washers

Question 40

when multiple countershaft design is used the main forward section often has how many gear selections

Answer 40

five

Question 41

multiple countershaft transmissions use several housings .these housings are kept in alignment through the use of

Answer 41

precise dowelling

Question 42

how are the input shaft and gear driven

Answer 42

by the clutch discs

Question 43

in a single coutershaft constant mesh desing the countershaft gears are

Answer 43

in constant mesh with the manshaft gears

Question 44

the mainshaft gears are located in place by

Answer 44

a set of double washers

Question 45

what is used to prevent transmission noise from being transmitted up into the cab

Answer 45

an isolator

Question 46

the shift lever directly moves the ____ in the shift bar housing

Answer 46

shift rail

Question 47

what is the function of the detent system

Answer 47

helps hold the shift rail in the neutral or selected gear position during operation

Question 48

what is the function of the interlock system

Answer 48

prevents transmission damage by preventing two gears from being selected at once

Question 49

what is the function of the spring loaded plunger

Answer 49

prevents the operator from selecting first or reverse when the vehilce is moving forward at a great speed

Question 50

in an overdireve transmission which of the forward gears be direct

Answer 50

fourth

Question 51

in most twin countershaft transmissions which gearing would the auxiliary section not provide

Answer 51

reverse

Question 52

where does the auxiliary drive gear recieve torque

Answer 52

from the mainshaft

Question 53

the auxiliary uses the synchronizer to aid in the ____ shift

Answer 53

range

Question 54

the purpose of the range, splitter and deep reduction cylinders is to

Answer 54

use the air signal to shift the auxiliary section sliding clutches

Question 55

what delivers toruqe to the driveline is supported on a tapered roller bearing and splined to the synchronizer sliding clutch

Answer 55

the output shaft

Question 56

the two speed auxiliary section provides

Answer 56

reduction and direct drive

Question 57

the three speed auxiliary section provides how many usable gears

Answer 57

12

Question 58

which position provides direct drive in a four speed auxiliary transmission section

Answer 58

high range high splitter

Question 59

what are the two methods of lubrication used on multiple countershaft transmissions

Answer 59

splash and pressure

Question 60

when a spin on filter is used on a transmission lubrication system the filter is located between the oil cooler and the

Answer 60

pump outlet port

Question 61

transmissions that utilize splash lubrication generally filter the oil by means of

Answer 61

magnetic plugs or magnet in the bottom of the case

Question 62

what is the best way to define a hybrid vehicle

Answer 62

any vehicle that has two means of propulsion

Question 63

what is the diffrence between a parallel hybrid and a series hybrid

Answer 63

a series hybrid the engine never directly propells the vehicle a parallel vehicle an electric motor or hydraulic motor is sandwiched between the engine and the transmission assists with the propulsion

Question 64

what are the three key components of a deisel parallel electric hybrid

Answer 64

motor/generator inverter power electronics carrier (PEC)

Question 65

what are the two main functions of the motor/generator

Answer 65

to propel the vehicle to charge the battery pack

Question 66

why are lithium batteries desireable for electronic hybrids

Answer 66

low discharge rates and high storage capacity

Question 67

during desiel electric propulsion mode what effect does the electric assist that the motor provides have on the desiel engine

Answer 67

lowers engine duty cycle

Question 68

what effect will coasting or braking have on lithium ion batteries

Answer 68

they will be charged

Question 69

in a deisel hybrid assembly which component recevies energy from the engine or the rear axle

Answer 69

the transfer case

Question 70

what are the two functions of the hydraulic pump/motor

Answer 70

during coast or regenerative braking it provides oil flow into the accumulators to presurize the sytem during propel the flow of oil is reversed and it provides torque to the driveline

Question 71

during propulsion what is the function of the hydraulic motor accumulator and tranfercase

Answer 71

oil from the accumulators to the hydraulic pump making it act as a motor then transfreing oil to the transfercase which then applys torque to the driveline

Question 72

in a deisel electric hybrid what color are the high voltage cables

Answer 72

orange

Question 73

in a deisel hybrid motor what is the minimum amount of time to allow for the accumulator to bleed down

Answer 73

5 min