NTTA questions - Suspension

Sample suspension and wheels & tyres questions

Which one of the following would check the effectiveness of a shock absorber (damper)?
A = slowly inspecting the unit exterior for leaks
B = bouncing the suspension and noting the rebound oscillations
C = detaching the unit and measuring the maximum travel
D = measuring the suspension maximum travel

Which one of the following is true?
A = torsion bars are only used in front suspension systems
B = torsion bars are always fitted with there length in line with the length of the vehicle
C = torsion bars can be used in front and rear suspension systems
D = torsion bars are only used in rear suspension systems

Which one of the following locates the position of a leaf spring in relation to the chassis or body?
A = spring centre bolt
B = shackle pin
C = anchor pin
D = U bolt

Which one of the front suspension systems does NOT cause the track width to alter when the left and the right front suspension is simultaneously deflected the same amount?
A = McPherson struts and track control arms
B = coil springs and double wishbones
C = longitudinal torsion bars and track control arms
D = Leaf spring and beam axle

Which one of the following is true about the material used for providing the “springing” in car suspension systems?
A = spring steel is always used
B = rubbed can be used
C = spring steal is never used
D = rubbed is never used.

A transverse leaf spring is one which has its greatest length?
A = in line with the length of the vehicle
B = across the vehicle
C = to the front of the driving axle
D = to the rear of the driving axle

A leaf spring 'swinging shackle' is for?
A = securing the spring to the axle
B = preventing the spring leaves from splaying
C = limiting the spring thickness
D = allowing the spring to alter its effective length when flexing

A suspension bump stop is for?
A = securing spring 'U' bolts
B = limiting suspension vertical movement
C = limiting suspension lateral movement
D = reducing road wheel vibration

Which type of shock absorber (damper) is usually used with a McPherson strut suspension?
A = lever
B = friction
C = telescopic
D = hydrolastic



The eye of a leaf spring is for?
A = locating the spring on an axle
B = attaching a spring to a chassis or body
C = attaching a shock absorber (damper) to the spring
D = checking spring alignment

A suspension torsion bar is usually made from?
A = mild steel
B = spring steel
C = silver steel
D = cast iron

When a suspension coil spring is 'coil bound' it usually indicates that?
A = the spring is over loaded
B = the spring is encased in a weatherproof jacket
C = the vehicle weight has been reduced
D = the vehicle has the wrong wheel clearance

What fluid is normally in hydraulic shock absorbers (dampers)?
A = water
B = anti-freeze mixture
C = alcohol
D = oil

In which direction does a 'pan hard rod' control suspension movement in relation to a vehicle longitudinal axis?
A = laterally
B = vertically
C = towards the front
D = towards the rear

Which one of the following front suspension system must have TWO combined steering & suspension swivel joints and TWO pivot joints for EACH front wheel?
A = McPherson strut
B = semi-elliptic leaf
C = double wishbone
D = leading arm

On a four wheeled car fitted with hydrolastic suspension which one of the following suspension unit linking arrangements would apply?
A = front right and front left to rear right and rear left
B = front right to front left to rear right to rear left
C = rear right to rear left to front right to front left
D = front right to rear right and front left to rear left


Compared with beam axle suspension which one of the following benefit that is provided by independent suspension?
A = less unsprung weight
B = more unspring weight
C = less moving parts
D = ease of jacking

Which one of the following is the best description of a mono-leaf suspension spring?
A = spring comprising several separate leafs fastened together
B = a spring which has only one leaf
C = one leaf spring providing suspension for two wheels
D = a non-metallic leaf spring

When the leaves of a multi-leaf spring are “splayed” it means?
A = a centre bolt joins the leaves together
B = the spring ends turn upwards
C = the spring ends turn downwards
D = one or more leaves are misaligned



Which one of the following spring types best describes a suspension coil spring
A = compression
B = tension
C = blade
D = rotary


WHEELS AND TYRES

Which types of tyre construction have the most flexible side walls?
A = cross ply
B = bias belted
C = radial
D = cross ply remolds

What does a tyre 'ply rating' indicate?
A = load carrying capacity
B = inflation pressure
C = maximum safe road speed
D = tread rubber thickness

The correct wheel rim diameter for a 185 x 13 size tyre is?
A = 13cm
B = 185mm
C = 13 inches
D = 6.5 inches

Where on a tyre are tread wear indicators located?
A = in the tread
B = on the side wall
C = on each shoulder
D = at the bead



A tyre that is run under inflated will wear more rapidly?
A = at the tread centre
B = on the outer side wall
C = at the tread shoulders
D = on the inner side wall

The “aspect ratio” of a tyre means that ratio between it’s?
A = inner and outer diameters
B = overall and width and tread width
C = tread width and tread thickness
D = width and sidewall depth

A car wheel description can include a number before the letter that number indicates?
A = the type of hub fitting
B = weather it is suitable for a tubeless tyre
C = its diameter
D = its width

For a car with four wheels which one of the following tyre type’s combinations is legally correct?
A = radial at the front and cross ply at the rear
B = cross ply at the front and radial at the rear
C = __ Belted at the front and cross ply at the rear
D = radial at the front and ___ belted at the rear?

The dish “offset” of a vehicle front wheel affects the?
A = castor
B = toe in or out
C = track width
D = king pin inclination

The “bead” of a tyre is situated?
A = at each tread shoulder
B = at the tread center
C = where is contacts the wheel
D = inside the tyre carcass at the tread shoulders