Unit B: Suspension and wheels Flashcards
The term ____ ____ refers to the weight of the load and the vehicle above the point at which the springs are connected.
Sprung weight
The type of frame rails commonly used on trailer frames is ____ and ____.
I-beams
Box
____ seal packings are made of leather, felt, plastic and non-metallic material.
Static
On the driveline of a tractor you should grease: Driveshaft \_\_\_\_ Clutch fork \_\_\_\_ Clutch release \_\_\_\_ Inter-axle driveshaft \_\_\_\_ joint
U-joints
Pivots
Bearing
Slip
Shoulder wear on a tire is caused by ____.
Under-inflation
Preventive maintenance programs are designed to cut down on the amount of ____ machine down time.
Unexpected
If a hourmeter is used as part of a maintenance program it is important to realize that the hourmeter records the time that the ____ is operating.
Engine
If a leaf on a leaf spring assembly is cracked then you should replace ____.
The individual leaf or the complete assembly
The complete assembly
The advantage of using a ____ seal is that they can contain high pressure, have a low leakage rate, and create little or no wear on a rotating shaft.
Face
The type of seal used on heavy-duty equipment to keep contaminants out is the ____ seal.
Exclusion
A radial lip seal that prevents fluids from leaking on a rotating shaft is a ____ seal.
Dynamic
The number of articulation points for each following trailer on a “B” train configuration is _.
1
For an overall preventive maintenance system to function properly the ____ must be involved in regularly scheduled servicing of the equipment, scheduled lubrication of the equipment and adjusting and inspection of the equipment.
Technician
The number of articulation points for each following trailer on an “A” train configuration is _.
2
On an air spring suspension system air is prevented from exiting the air springs when the ride control valve is in the ____ position.
Closed
When a tire experiences a ____ ____ problem it will seem like it is bouncing or hopping.
Static balance
To heat a bearing you should NOT use an ____ flames.
Open
The double lip radial seal has one seal to seal in fluids and one to seal out ____.
Dust
A liquid surge in a tank could cause the frame to ____.
Bow
A certain load causes a spring assembly to deflect a certain amount. If the load is doubled and the amount of deflection doubles then the assembly is a ____ ____ spring assembly.
Constant rate
A drop-leg landing gear on a trailer can be used to raise or lower a trailer.
True or False
False
Directional tires are tires that should be mounted so they ____ in a certain ____ for self cleaning.
Rotate
Direction
The term “dead-axles” refers to axles that are ____.
Non-driving
After installing a fifth wheel assembly it is important to test and adjust the lock jaws. When testing, the kingpin should rotate with ____ resistance.
Some
Basing a maintenance schedule on a dollar value spent on fuel is not an accurate method because:
fuel costs ____
fuel efficiency varies depending on ____
during idling no other parts of the machine are ____.
Fluctuate
Load
Operating
A tire and rim assembly that allows it to be removed and still keep the spoke wheel attached to the vehicle is called a ____ rim.
De-mountable
A bushing is a ____ bearing.
Friction or anti-friction
Friction
After a connection is made to a no-slack pintle hook the mechanism is prevented from accidentally ____ by use of a latch and parking pawl.
Opening
The first step when removing a fifth wheel from the mounting bracket is to remove the ____ ____.
Bracket pins
The gear-operated landing gear on a trailer where the input speed is reduced and the torque is increased is called an ____.
Underdrive
A pintle hook must be replaced if the wear exceeds ____ inch.
3/16
Placing dual tires with a different section width on a heavy-duty vehicle will cause one tire to carry ____ of the load.
More
When operating an off-road vehicle it is common to shut it down for maintenance after a certain amount of operation hourse.
True or False
True
When a rim clamp is used to separate 2 trim and tire assemblies it must allow a minimum of _ threads to pass the face of the retaining nut.
3
