HV04 - 12 Chassis System Questions

The Cords Of A Radial Ply Tyre...

• cross the tyre at 135^o to the bead
• cross the tyre at 45^o to the bead
• cross the tyre at 90^o to the bead
• cross the tyre at 180^o to the bead

The diagram is showing that...

• the front wheels are set with positive camber
• the front wheels are set with positive castor
• the front wheels are set with negative castor
• the front wheels are set with negative camber

Which of the following is commonly used on heavy vehicle drive axles?

• A fully floating axle
• A semi-floating axle
• A three quarter floating axle
• A fixed axle

Pitch, when applied to vehicle suspension, is defined as:

• the maximum amount of vertical travel of the suspension
• a sudden vertical movement of one side of the vehicle
• a sudden vertical movement of the front or rear of a vehicle
• the outward tilt of the vehicle's bodywork during cornering

When using a roller brake tester, the brake pedal should be:

• pressed gradually
• released quickly
• pumped vigorously
• stamped on

Steering wheel 'shimmy' which gets worse as the vehicle's speed increases indicates that:

• the front wheels are out of alignment
• dynamic imbalance of the front wheels
• the front tyre pressures are too high
• the front shock absorbers are worn

A suspension damper (shock absorber) dampens the spring oscillations by:

• converting heat energy into kinetic energy
• converting kinetic energy into heat energy
• converting chemical energy into heat energy
• converting generic energy into heat energy

You're repairing a heavy vehicle which is carrying Acetylene. What precautions should you take?

• Use a well ventilated area as Acetylene is lighter than air
• Work as close as possible to a fire escape
• Work over an inspection pit to contain any escaping vapors
• Place a 5 meter cordon around the vehicle

The purpose of the wheel sensor in an anti-lock braking system (ABS) is to:

• induce a voltage in proportion to wheel speed
• send a signal to the modulator when the wheel has locked
• calculate the braking efficiency
• induce a current in proportion to road speed

Which one of the following pressures holds the spring brake actuator in the OFF position?

• Air
• Hydraulic
• Atmospheric
• Spring