HV12 Test 1

The purpose of a sliding joint in a propshaft, is to allow for:

• the drive to be transmitted through a variable angle

• changes in propshaft length due to suspension movement

• the drive to be transmitted at a constant velocity

• any torque fluctuations that occur in the transmission

A gearbox with a top gear ratio of 1:1 is known as a:

• direct drive gearbox

• splitter gearbox

• range change gearbox

• compound gearbox

The type of final drive unit shown in the picture is a:

• worm and wheel

• spiral bevel

• sun and planet gear

• hypoid bevel

An engine operating at 1200rpm and the torque at the flywheel is 600Nm. With 2nd gear selected which has a ratio of 8:1, what is the speed and torque of the gearbox output shaft?

• 150rpm and 4800Nm

• 800rpm and 800Nm

• 1200rpm and 480Nm

• 9600rpm and 100Nm

When an overdrive gear is selected in a manual transmission the input shaft:

• and output shafts produce the same torque

• rotates faster than the output shaft

• rotates slower than the output shaft

• and output shaft rotate at the same speed

Periodic adjustment of a mechanically operated clutch release mechanism is necessary to maintain clearance between the:

• release bearing and thrust pad

• pressure plate and diaphragm spring

• diaphragm spring and release bearing

• flywheel and pressure plate

A typical coefficient of friction value for a centre plate and a flywheel is:

• 2.8

• 0.4

• 0.01

• 3.0

A rear axle produces a 'clicking' noise when cornering. One possible fault could be a:

• chipped or missing crown-wheel gear tooth

• chipped or missing differential gear tooth

• broken axle half-shaft

• worn propshaft universal joint

The diagram shows a flywheel being checked for:

• diameter

• wear

• circumference

• run-out

On many electronically controlled gear selection mechanisms there is no need for a clutch pedal. This is because:

• a torque converter is fitted between the gearbox and flywheel

• clutch operation is controlled via a hydraulic pump on the rear of the gearbox

• clutch operation is controlled by electro-pneumatic cylinders

• the gearbox is driven directly from the engine