Transmissions

Question 1

What are the 6 gear types

Answer 1

Spur, miter, herringbone, helical, bevel, hypoid

Question 2

What is backlash

Answer 2

It is the amount of play between gear mesh

Question 3

What is pre load

Answer 3

It is the force between objects not caused by external load

Question 4

What is rolling drag

Answer 4

It is the amount of force/ torque when the object is moving

Question 5

What is end play

Answer 5

The amount of axial play in an object

Question 6

How to find a gear ratio

Answer 6

It is driven % driver :1

Question 7

How to find speed in a gear ratio

Answer 7

Input speed divided by gear ratio

Question 8

What does an idler do

Answer 8

It changes direction not gear ratio

Question 9

What does mfwd stand for

Answer 9

Mechanical front wheel drive

Question 10

What does cv stand for

Answer 10

Constant velocity

Question 11

What is the purpose of phasing a driveshaft

Answer 11

To reduce whip

Question 12

What is an epicyclic gear set

Answer 12

A planetary gear-set which consists of sun planetary gears, a planetary carrier and a ring gear

Question 13

What is a annulus gear

Answer 13

It is a ring gear

Question 14

What happens if you lock 2 epicyclic gear set components together

Answer 14

It creates direct drive

Question 15

Why would you preload a bearing

Answer 15

It allows for thermal expansion and stops excessive side to side movement

Question 16

What is a sliding mesh gearbox

Answer 16

All gears are straight cut

Question 17

What is a constant mesh gearbox

Answer 17

It is a gearbox where all gears are splined but not until a synchro is moved do they engage

Question 18

What are the 4 tasks of a synchroniser

Answer 18

Prevent early engagement
Synchronise speed
Mesh gear
Lock into gear

Question 19

How to work out a compound gear ratio

Answer 19

Driven over driver x driven over driver : 1

Question 20

To calculate overall gear ratio you can times all ratios to get the answer

Question 21

What does a brake do in a gearbox

Answer 21

It stops a component from moving

Question 22

What does a clutch do within a gearbox

Answer 22

It grabs onto the component and spins with it

Question 23

To achieve reverse what must be held on a planetary set

Answer 23

The planetary carrier must be held

Question 24

How can backlash be tested

Answer 24

With a dti

Question 25

What are the 4 parts of a torque converter

Answer 25

Impeller Stator Turbine Lock clutch

Question 26

What does preload allow

Answer 26

To rotate without excessive thrust

Question 27

What is the purpose of an interlock mechanism on a transmission

Answer 27

To lock the gear into place once it has selected it

Question 28

What is the purpose of a differential

Answer 28

To allow wheels to carry at different speeds round corner

Question 29

Fully floating hubs are viable to what stress

Answer 29

Torsional stress

Question 30

Electronic gearbox will often include ?

Answer 30

Switches and solenoids

Question 31

What is a positive drive system

Answer 31

A fixed system that can’t slip eg a gear or chain

Question 32

What are the 3 shafts in a transmission

Answer 32

Input , lay and output

Question 33

What is the optimal place for gear mesh

Answer 33

In the middle of the tooth

Question 34

How to work out torque

Answer 34

It is ratio x torque input

Question 35

What is cone point

Answer 35

How far a pinion sticks out of a housing can be adjusted with shims and a dti

Question 36

What is a dampening clutch plate

Answer 36

One which springs on the face to reduce shock

Question 37

What is a cvt

Answer 37

Constantly variable transmission

Question 38

What are the 2 types of flywheel

Answer 38

Duel mass has a torsion dampener in it And solid mass

Question 39

Torque converter and a fluid flywheel are both what ?

Answer 39

A fluid coupling

Question 40

What are the parts of a torque converter

Answer 40

Stator , impeller, turbine and locking clutch

Question 41

How does a torque converter work

Answer 41

The flywheel is attached the the outer casing which is the impeller. This drives the fluid causing the turbine to drive The stator recycles the vortex flow and pushes it back into the impeller to stop starvation

Question 42

What are the 3 phases of drive

Answer 42

Stall Acceleration And coupling

Question 43

What is a non positive drive

Answer 43

Something which can slip such as a belt

Question 44

How do you lock a gear in place

Answer 44

Using a ball and spring detent

Question 45

What gear set is a diff

Answer 45

A hypoid gear set transfers power 90 degree

Question 46

How do you stop whip in a driveshaft

Answer 46

Align the yokes so they are in the same direction which balances the shaft

Question 47

Customer has exited a muddy field and it is now hard to steer vehicle what could this mean

Answer 47

This diff lock is still on

Question 48

What component of a torque converter is fitted with a lock clutch

Answer 48

Stator

Question 49

What is the purpose of clutch free play

Answer 49

To allow the clutch to disengage and engage properly

Question 50

What is a gear type with angled cuts

Answer 50

Helical

Question 51

What component drives the input shaft

Answer 51

The clutch drives the input shaft

Question 52

What are the 2 types of manual gearbox

Answer 52

Sliding mesh and constant mesh

Question 53

What is a normal tractor axel semi floating or fully floating

Answer 53

Semi due it having 2 bearings for support

Question 54

What does a reactionary refer to in a planitary gear set

Answer 54

Anything which is held

Question 55

How to achieve overdrive in a planetary gear set

Answer 55

Make the planetary carrier the input

Question 56

What is a femar valve

Answer 56

Is it to assist in modulation a solenoid which can operate multiple things at once

Question 57

What is electro hydraulic modulation

Answer 57

Is it valve operated/ electrical, to achieve metered fluid output

Question 58

What does an air pump do in a gearbox

Answer 58

It pressurises the gearbox and prevents overheating

Question 59

What does an anti cavitation valve do

Answer 59

It provides a back stop for the oil to ensure no cavitation occurs in the clutch packs

Question 60

What does an overspeed relief valve do

Answer 60

It helps to reduce unwanted clutch activation, by keeping oil pressure equal

Question 61

What does a modulator valve do

Answer 61

It fills slightly with pressure and once it has arrived through back pressure it allows full oil flow to come through this allows a smoother engagement