LV3 158 chassis, steering and braking

What does a negative thrust angle indicate in a vehicle's steering system?

• A negative thrust angle indicates that the rear wheels are not aligned with the vehicle's centerline, causing the vehicle to 'crab' or move sideways.

• A negative thrust angle indicates that the front wheels are perfectly aligned with the rear wheels.

• A negative thrust angle means the vehicle will always pull to the right.

• A negative thrust angle shows that the steering wheel is centered during straight driving.

The thrustline should be aligned with the vehicle's centerline after proper alignment adjustment.

• True

• False

Self-centring action is achieve by a combination of:

• Kingpin axis, castor and camber.

• Swivel axis inclination and castor.

• Castor and toe in.

• Swivel axis inclination and camber.

A faulty P.A.S pressure relief valve that has seized in closed position could cause?

• A burst hose in a hydraulic system.

• Low PAS pressure.

• Increased revving of the engine.

• An over flowing fluid reservoir.

Air trapped in the hydraulic PAS system can cause symptoms of:

• Juddering when turning from lock to lock.

• High PAS pump pressure.

• Pressure relief value stuck open.

• Worn wheel bearings.

What is the name of the tool?

• Wheel alignment gauge

• Tracking gauge

• Scales

• Sliding plate

Due to the Ackerman principle, when a vehicle is turning the Outer wheel will:

• turn through a smaller angle than the outer wheel

• rotate in the opposite direction to the outer wheel

• rotate faster than the outer wheel

• turn through a larger angle than the outer wheel

What is a possible cause of ware on both edges of a tyre?

• Wheels out of balance

• Low pressure in the tyre

• High pressure in the tyre

• Tracking

A flat spot or bald patch on a tyre's tread can be caused by:

• Incorrect caster angle

• Over-inflated tyre

• A road wheel locking during heavy breaking

• Under-inflated tyre

A cut in a tyre would be illegal if it is:

• In excess of 25mm length.

• In excess 10% of the section width of the tyre.

• Not deep enough to reach the ply or cord.

• Not punchered on the side wall.