7290-158 Steering Pt2

What is Steering Ratio?

• The difference in diameter of road wheels and steering wheel in %

• the ratio between the turn of steering wheel and the road wheels in °

• The ratio between steering wheel turn and road wheels in mm

• The angle difference, at each side at 20° left lock

If a steering has to be turned more to get wheels turning this is?

• Incorrect thrust angle

• Low steering ratio

• High steering ratio

• Power assisted

Formula one cars have which ratio?

• High

• Low

• Very high

• Very low

How is the ratio varied on a rack and pinion system?

• Smaller space at centre of rack

• Larger gap at centre of rack

• Epi-cyclic gears

• Dual universal joints

On a variable ratio rack the smaller pitch at centre does what?

• Less sensitive

• More sensitive

• makes it easier to oversteer

• Wheels react better at lock

Which part is NOT required for Hydraulic power steering?

• Pump

• Control valve

• Piston

• E.C.U.

In Neutral position,

• The imbalance on the piston pushes towards smaller force

• Imbalance on the piston pushes on greater force

• All passages are equal fluid drops up to 5mm

• The pump stops turning as no pressure required

If power steering assistance too high, what is likely fault?

• Flow control valve spring broken

• Vane pump low output

• Hydraulic piston leaking

• Flow control valve stuck closed

If steering assistance is too low, the likely fault is?

• Speed sensitive control solenoid failed

• Speed signal too low

• Rotary valve torsion beam loose

• Flow control valve closed

How is a pressure gauge connected ?

• In Parallel on High Pressure hose

• In Series on High Pressure hose

• In Series on return Hose

• In Parallel on return Hose