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Automotive Level 2 > Crucial Transmission Points > Flashcards

Crucial Transmission Points Flashcards

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1
Q

What would excessive free play in the clutch cause?

A

Clutch drag

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2
Q

What would insufficient free play in the clutch cause?

A

Clutch slip

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3
Q

What is the most likely fault if the clutch emits a constant bearing whine, when the clutch is not depressed?

A

A worn clutch release bearing

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4
Q

Which of the following components is not part of the clutch release mechanism:
Clutch pedal
Pressure plate
Clutch cable
Centre plate

A

Centre plate

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5
Q

What is the purpose of the sliding joint fitted to as prop shaft?

A

To accomodate for changes in the propellor shaft length due to movement

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6
Q

Why is a customer’s signature required to authorise work being carried out on a vehicle?

A

It creates a legally binding contract between the customer and the garage

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7
Q

What type of gears are used in a sliding mesh gearbox?

A

Spur gears

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8
Q

Which fault can cause clutch slip?

A

Lack of free play

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9
Q

What should be done to safeguard yourself and others when working in a vehicle repair workshop?

A

Adhere to all the above

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10
Q

Why are multi-plate clutches used

A

When there is not much space and a high torque needs to be transmitted

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11
Q

Which of the following is not a legal requirement when test-driving a vehicle on a public road:
A current road fund license
Driver wearing a seat belt
Trade plates front and rear
A valid driver’s license

A

Trade plates front and rear

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12
Q

Why should you report any defects when carrying out a routine service on a vehicle?

A

So the customer can be contacted to get their authority to do extra work

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13
Q

What is the most likely cause of difficulty engaging gears, especially in 1st?

A

Clutch drag

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14
Q

What can a misaligned propeller shaft in a rear wheel drive car cause?

A

Transmission vibration

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15
Q

An automatic gearbox usually contains a…

A

Sun gear, planet gear and annulus/ring gear

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16
Q

What dooes a front wheel drive transmission use?

A

Constant velocity joints

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17
Q

List 5 components of the clutch release mechanism

A

Master cylinder, slave cylinder, hydraulic lines, clutch pedal, clutch fork

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18
Q

What would the effect of air in the clutch hydraulic operating system be?

A

The clutch being unable to fully disengage, because hydraulic transmission relies on compression of liquid and air can be compressed, reducing pressure

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19
Q

Give a symptom of clutch slip

A

Revs increase bu the car does not accelerate

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20
Q

Give a symptom of clutch drag

A

Difficulty shifting gears

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21
Q

Give a symptom of clutch judder

A

Jarring vibration in the steering wheel

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22
Q

Name the clutch component that drives the gearbox

A

The clutch plate

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23
Q

What does the clutch interlock mechanism do?

A

Prevents 2 gears from being selected simultaneously

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24
Q

How are gears connected to the output shaft on a 4-speed constant mesh gearbox?

A

Using needle roller bearings

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25
Q

What will a worn synchro cone/baulk ring result in?

A

Crashing into gear

26
Q

Define hypoid axle

A

A kind of rear axle where the pinion engages the crown wheel below the centre line

27
Q

What would a typical final drive ratio be?

A

Between 3:1 and 4:1

28
Q

Where can a fully floating axle be found?

A

On light HGVs

29
Q

In a vehicle with a fully floating rear axle, what will a broken axle cause?

A

The wheel will not fall off

30
Q

List 3 advantages of using a diaphragm spring clutch over a multi coil spring clutch

A

Smaller in size and weight, transfers more torque, higher load-carrying capacity

31
Q

List 2 reasons to use a clutch centre plate with a spring hub

A

Reduces torsional stress, absorbs shock loads from sudden clutch engagement

32
Q

What is the difference of the transmission ratios in a rear wheel drive car, compared to front wheel drive?

A

There is only one transmission ratio, because it’s just input to output shaft, no lay shaft

33
Q

Why does the baulk ring/synchro cone have a screw type finish on its surface?

A

To let oil escape

34
Q

What kind of oil should be used in a rear wheel drive final assembly?

A

EP (extreme pressure) oil

35
Q

What substance is used to lubricate the wheel bearings in a car?

A

LM grease (might just say grease)

36
Q

The gear ratio is 2:1. If the engine sends 120 Nm of torque at 5000 rpm into the input shaft, what will the gearbox send into the output shaft?

A

240 Nm at 2500 rpm

37
Q

Where does the half shaft transmit drive from?

A

Propellor shaft to the gearbox universal joints

38
Q

The clutch fork actuator system may be a direct mechanical system or…

A

Hydraulic

39
Q

When calculating the gear ratio on a gear set that incorporates the idler gear…

A

Ignore the idler gear size, focus on driver and driven

40
Q

What’s another term for gear reduction?

A

Underdrive

41
Q

How does a coil spring clutch look different do a diaphragm spring clutch?

A

The springs come outward

42
Q

The gear ratio is 2:1. What will happen?

A

Torque will be double the input.
Speed will be half the input

43
Q

A better term for longituadinal driveline?

A

Transverse

44
Q

What tool do you use to remove the inner track of a bearing?

A

Puller

45
Q

What’s the prop shaft made of?

A

Steel

46
Q

What vehicle will a fully floating axle be used on?

A

Light HGVs

47
Q

Which 2 transmission components are inspected in an MOT test?

A

The CV joint and boot

48
Q

Why would you use a DTI on a final drive assembly?

A

To check backlash

49
Q

When is clutch drag more noticeable?

A

In 1st and reverse gear

50
Q

What does the detent do?

A

Holds the selector shaft in place

51
Q

Which clutch component drives the gearbox?

A

Clutch plate

52
Q

Name one symptom of clutch slip

A

Revs go up, without accelerating

53
Q

A visual inspection of the clutch release assembly will reveal…

A

Surface cracks and hotspots

54
Q

What is the purpose of the synchronisers?

A

Ensure that the gears rotate at the same speed, to prevent gear clash

55
Q

What fault is most likely to produce clutch judder?

A

Sticking clutch cable

56
Q

What is the most likely cause of a load knocking sound while turning in front-wheel drive?

A

A badly worn constant velocity joint

57
Q

What can a badly worn gear change mechanism result in?

A

Difficulty changing gears

58
Q

What will a rear crankshaft oil seal leaking result in?

A

Clutch slip

59
Q

Which of these will result in failing an MOT test:

A

An outer constant velocity joint gaiter is split

60
Q

What happens if the interlock mechanism is defective?

A

Transmission would lock up, causing damage

61
Q
A

Automotive Level 2 (21 decks)

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