Automotive Transmissions a Recap Primer

The majority of car clutches have what sort of springs?

• Coil or Leaf

• Torsion Bar or Diaphragm

• Diaphragm or Coil

• Leaf or Diaphragm

Which of the following can affect the ability of a clutch to transfer torque?

• The number of friction surfaces

• The effective diameter of the clutch disc

• The spring pressure

• The coefficient of friction

• All of the above

In a manual gearbox clutch, which shaft is the clutch disc mounted onto?

• The 1st Motion Shaft

• The 2nd Motion Shaft

• The 3rd Motion Shaft

• The 4th Motion Shaft

What is a gear wheel called that has teeth cut in line with the gear axis?

• Single Helical

• Stetson

• Spiral

• Spur

What is the correct name for a final drive gearbox where the input shaft is not on the centre line of the crownwheel?

• Ovoid

• Hypoid

• Hybrid

• Highline

When calculating gear ratios in a simple gear train, which is the correct formula?

• Driven divided by Driver

• Driver multiplied by Driven

• Driven multiplied by Driver

• Driver divided by Driven

Which springs in a clutch help to minimise the effects of engine vibrations

• Cushion Spring

• Diaphragm Spring

• Torsion Spring

• Leaf Spring

Why are standard differential gearboxes used in car transmissions?

• To ensure the driven wheels always turn at the same speed

• To ensure the driven wheels never turn at the same speed

• To ensure the driven wheels can turn at different speeds

• To improve braking on slippery road surfaces

What is the gear ratio in a simple gear train if the Driver has 17 teeth and the Driven has 53?

• 0.32:1

• 4.38:1

• 3.11:1

• 0.22:1

Why does a manual gearbox have an interlock mechanism?

• To hold the car securely on a hill in case of handbrake failure

• It is an anti-theft device required by insurance companies

• It helps cool the transmission fluid

• To ensure two gears cannot be selected at the same time