WorksheetsKAA Group 15 - Test Level 4
Total questions: 37
Worksheet time: 3hrs 8mins
DIFFERENTIAL LOCK/BRAKING TORQUE CONTROL COMPARISON:
How do a differential lock and braking torque control system help when one drive wheel is spinning and the other is stationary?
The differential lock enables the drive wheels to run at different speeds
In the breaking torque control system, the drive torque at the stationary wheel is increased by applying braking pressure at the spinning wheel.
In the differential lock, a counter torque is generated at the spinning wheel
In the differential lock, a rigid connection is created between the two shafts
In the breaking torque control system, the spinning wheel is braked until it is not longer turning
In what driving situation does the differential lock help?
In the case of sliding friction at just one drive wheel, drive torque is transmitted to the gripping wheel
In the case of sliding friction at both drive wheels, drive torque is transmitted to the front axle
Traction is increased on a dry surface
How do the rear axle differential lock and braking torque control differ?
In the case of sliding friction at just one drive wheel, only the rear axle differential lock helps, while braking torque control remains ineffective
In the braking control system, the differential is positively locked by brake pressure
In the differential lock, the input drive torque is used completely for propulsion, but this is not the case in the braking torque control system
Why is a dog clutch on one drive axle sufficient?
Because the compensating gears can no longer rotate around their axis
Because the other drive shaft is driven by the compensating gears
Because drive torque is transmitted to the locked driveshaft even so the other driveshaft is turning faster
What advantages does the ASD Automatic Locking Differential offer compared with the mechanical dog clutch?
Incorrect operation by the driver is not possible with the ASD
The ASD provides a positive and thus 100% lock
Since the dog clutch only acts on one side of the differential the other wheel can rotate freely
The warning lamp warns the driver at higher speeds too
What common features do the ETS Electronic Traction System and the ASD Automatic Locking Differential share?
ETS uses many of the ABS components
Both systems act directly on the wheel brake
Both systems warn the driver by means of a warning lamp - at higher speeds too
Both systems record wheel speeds via rotational speed sensors and intervene in the event of speed difference, if necessary
Both systems use brake fluid from the brake fluid reservoir to generate hydraulic pressure
In the braking torque control system, less drive torque is transmitted to the wheel with static friction than with the differential lock. What are the consequences for this?
In the braking torque control system, there is less force for pulling away available than with the differential lock
With the differential lock, the wheel with static friction has a greater tendency to spin than in the braking torque control system
In the braking torque control system, there is less propulsive force available at the gripping wheel than with the differential lock
In the event of very low friction at the drive wheels, there is more chance of moving forwards with a differential lock than with braking torque control
The left drive wheel is spinning on a slippery surface, while the right drive wheel is stationary on a dry surface. The car is not moving forwards - why not?
Because the driving resistance is lower than the sliding friction torque
Because the torque at the stationary wheel is lower than the driving resistance
Because there is a high torque at the spinning wheel, though it is no use here
ACCELERATE GENTLY
Why can it help, when pulling away with both drive wheels on a slippery surface, to accelerate as gentle as possible?
If the propulsive force at the drive wheels is lower than the drive resistance, the vehicle pulls away
If the propulsive force at the drive wheels is lower than the available friction force, the wheels grip
If the engine torque is lower than the torque at the drive wheels, the vehicle pulls away
What are the three alignment angles?
Sugar, water and salt
Caster, Toes and Camber
Final drive, ring gear and spider gear
Caster and Camber are measured in degrees and minutes.
True
False
What is very appreciated here in Kuwait?
Both of the above
How many minutes equals one degree?
100
50
60
1
Which angle does the picture represent?
Positive camber
Negative camber
Which angle does the picture represent?
Positive camber
Negative camber
Which angle does the picture represent?
Toe out
Toe in
Which angle does the picture represent?
Toe out
Toe in
Which angle does the picture represent?
Negative caster
Positive caster
Which angle does the picture represent?
Negative caster
Positive caster
Which alignment angle is shown?
Positive Camber
Negative Camber
Toe Out
Toe In
Which alignment angle is shown?
Positive Camber
Negative Camber
Toe In
Toe Out
What part is moved in and out to adjust toe on a vehicle?
Control Arm
Tie Rod
Wheel offset
Ball Joints
Excessive negative camber will cause the tires to
Wear rapidly on the inner edges
Wear rapidly on the outer edges
Cause a feathered edge
Will give the vehicle better straight ahead stability
When describing turning angle/maximum steering angle,
The outer front wheel must turn at a sharper angle than the inner wheel.
Both front wheels turn at equal angles.
The inner front wheel must turn at a sharper angle than the outer wheel.
The degree the wheels turn vary depending on speed.
Negative front toe will cause:
the tire's outer shoulders to wear.
rapid wear to the center section of the tire.
the tire's inner shoulders to wear.
will not cause any irregular wear to the tire.
When another technician is pulling a vehicle onto the alignment rack where should you stand to guide them onto the alignment rack?
In front of the rack
Behind the rack
The technician shouldn't need help if he knows what he's doing
Off to one side of the alignment rack, for safety
When performing a pre-alignment inspection you should check what?
Tire Air Pressure
Wheel Bearings
Suspension Components
Vehicle Ride-Height
All of the above
What caused this tire wear?
Under-inflation
Over-inflation
Excessive Caster
Excessive Camber
This tire wear was caused by?
Over-inflation
Camber
Under-inflation
Toe
What is causing this tire wear
Over-inflation
Toe In
Toe out
Under-inflation
Understanding wiring diagram.
Which statement is correct?
When referring to connector plugs, the connector is depicted as a semicircle and the socket as a bent line
When referring to connector plugs, the connector is depicted as a semicircle and the socket as a straight line
When referring to connector plugs, the connector is depicted as a short straight line and the socket as a semicircle
Why are valves Y1 and Y2 shown within a boundary line?
Because they are both part of the same component
Because the vehicle may be fitted with either component but not with both
Because they are connected to another diagram
Which component is on grid reference 1G?
The starter motor
Fuse F8
The main ground connection
Wiring diagrams:
What is the function of ground point W7?
It completes the circuit for the rear lights
It completes the circuit for the starter
It completes the circuit for the outside air temperature sensor
Wiring diagrams:
Which symbol indicates a permanent connection?
What color cable supplies right-hand stop lamp?
(German abbreviations in the diagram)
Black/Yellow ( sw/ge)
Black/Red (sw/rt)
Black/Violet/White ( sw/vi ws)
Which backside is the most beautiful in this foto selection?
