Braking, Steering, Suspension Test Flashcards
Where is the brake servo usually mounted?
Directly to the brake pedal
What does the term hygroscopic mean?
Absorbs water from the atmosphere
How will the leading brake shoe wear?
Wear faster than the trailing brake shoe
If a tyre is marked 205/65R15, what is 15 inches?
The bead diameter
In the diagram, what is component 1? (see question 5 on phone)
Brake adjuster
In the diagram, components 8, 9 and 10 are… (see question 6)
Fluid seals
If the front road wheel is set to tilt inwards at the top, what does it have?
Negative camber
To still be able to stop a car, even if there is a serious leakage on one brake hose, what are cars fitted with?
A dual line system
What is it important to do to maintain performance and safety requirements? (see question 9)
Fit replacement parts that mean original manufacturers specification
On inspection, you notice brake fluid stains near the brake system. What would you check next?
The brake fluid level
When fitting new brake calipers or other major brake parts, what is it good sense to also do?
Replace the brake fluid
Which of the following pieces of information can be found in the workshop manual? (see question 12)
Vehicle’s specifications and settings
On the service, the customer complains of a judder on braking. What would you check and which tool would you use to check it?
Check disc runout with a DTI gauge
You suspect the front brake discs are warped. What would you check the discs with?
A dial gauge (DTI)
Define ‘negative swivel axis inclination’
The outward tilt of the swivel axis (king pin inclination) when viewed from the front of the vehicle
What is the name for the tyre section height expressed as a percentage of the section width?
The aspect ratio
If you test a shock absorber by ‘bouncing’, what must the maximum amount of bounces not exceed?
3
The Ackermann steering angle is designed so that…
The inner wheel turns at a greater angle than the outer wheel
A vehicle has taper wear on the outer edge of one of the front tyres. What is it likely to have?
An incorrect camber angle
What does the aspect ratio of a tyre affect?
The maximum tyre speed
The suspension in the picture is known as what? (see question 1)
Multi-link suspension
In the picture, what is the function of component 1? (see question 2)
To hold the brake pads in place
What is the Ackermann steering angle designed to give?
A true rolling motion on corners
What is negative offset in relation to steering angles?
When the centre line through the swivel pin intersects…
The brake pad will feel spongy and have an excessive amount of travel if…
There is air in the brake system
What will a buckled front wheel give?
Uneven tyre wear and inaccurate wheel alignment readings
What will an over-inflated tyre will tend to do?
Wear on the centre of the tread
What are out of balance front wheels likely to cause?
The steering wheel to shake
In relation to steering geometry, what is the purpose of the ‘castor’ angle?
Provide a greater degree of self-centring
Why is brake fluid periodically replaced during routine maintenance?
Because it absorbs moisture which lowers the boiling poiunt
In relation to checking and adjusting the front wheel alignment, why should you check in 3 wheel positions?
It will show if the wheels are buckled
What is a vertical movement of the body at the front then the back in turn called?
Pitch
In relation to vehicle behaviour during cornering, what is ‘understeer’?
When the slip angles of the front tyres are larger than the slip angles of the rear tyres
‘Feathering’ on the front wheel tyre thread is usually caused by what?
Incorrect wheel alignment
What is an indication that the front wheels may require balancing?
Steering wheel vibration that increases with vehicle speed
Which component reduces the amount of times a road spring will bounce after the wheel hits a bump?
A damper
A rear suspension system consisting of a solid rear axle with a spring and damper at each end is called what?
Non-independent rear suspension
Why is electronic power steering preferable to hydraulic power steering on small engine cars?
Electronics take less power from the engine than hydraulics
What does hydro-pneumatic suspension transfer?
Transfers road wheel movement via liquid to gas damper
What does adaptive suspension use?
Hydraulic damping, controlled by sensors, actuators and an ECU
How does hydraulic suspension dampens out spring movement?
Forcing oil through valves to slow its movement
