Transmission and driveline faults 3

One advantage of epicyclic gearing is:

• it is very compact for a given torque multiplication

• it enables the use of a synchromesh gear mechanism

• it can achieve torque multiplication by use of a stator member

• all of the answers shown

What general tools are required to check pinion rolling torque and crown wheel backlash:

• feeler blade, torquemeter and clock gauge with magnetic base

• torque wrench and clock gauge with magnetic base

• feeler blade and straight edge

• torquemeter and dial test indicator with a magnetic base

The picture shows a type of fluid coupling. The speed difference between components 'A' and 'C' will be greatest:

• at maximum engine speed

• when vehicle is cruising

• when the engine is idling

• during acceleration

When a traction control system senses wheel slip it will:

• automatically brake the parallel driving wheel

• stop the ABS modulator working

• limit the engine RPM and brake the slipping wheel

• reduce the engine RPM and brake both wheels

When adjusting the crown wheel rotational torque, the crown wheel must have:

• zero end float, zero backlash

• 1-2mm end float, measurable backlash within tolerance quoted

• zero end float, measurable backlash within tolerance quoted

• 1-2mm end float, zero backlash

The picture shows a simple epicyclic gear train. Reverse drive will occur when:

• the planet carrier is held stationary and the sun gear is rotated

• two of the three members are locked together

• annulus gear is held stationary and the sun gear is rotated

• sun gear is held stationary and the annulus gear is rotated

A vehicle is fitted with an overdrive gear arrangement. At cruising speeds this will mean:

• torque output is reduced, speed output is reduced

• torque output is increased, speed output is increased

• torque output is increased, speed output is reduced

• torque output is reduced, speed output is increased

What is the purpose of the grooves on the conical surface of a synchromesh baulk ring?

• To prevent the engagement of more than one gear at a time

• To allow for better lubrication of the friction faces to prevent overheating

• To provide a rapid breakdown of the oil film and allow the cone faces to lock

• To a smaller contact area and thereby reduce friction between surfaces

One advantage of using semi automatic transmission control is:

• reduction in gear oil maintenance

• reduced gear ratio options

• reduced gear selection lever movement reducing driver fatigue

• increased gear selection lever movements reducing driver fatigue

The picture shows a simple epicyclic gear train. In an automatic gearbox it is conventional practice for the epicyclic gear train shown to:

• provide two forward gears and one reverse gear

• be coupled with a fluid flywheel to provide torque multiplication

• provide two reverse gears and one forward gear

• be coupled with other epicyclic gear trains to provide more than two forward gears