Suspension Wheels And Systems

Question 0

What’s the advantage of using a trombone type trailer

Answer 0

The trailer can be adjusted to the length of the load

Question 1

Name 4 things on the driveline of a tractor you should grease

Answer 1

Driveshaft U joints.
The clutch fork pivots.
The clutch release bearing.
The inter-axle drive shaft slip joint

Question 2

On a typical highboy frame, side rails are connected to do what 3 things

Answer 2

Increase frame strength.
Provide a place for the attachment of retention chains.
Provide a place for the installation of stakes.

Question 3

The frame of a heavy on-highway vehicle does not support which part

Answer 3

The wheels

Question 4

What will a vibration sensor, installed as part of the engine system, do when it senses excessive vibration

Answer 4

Shut down the engine

Question 5

Shoulder wear on a tire is caused by

Answer 5

Under inflation

Question 6

What are three types of static seals

Answer 6

I sealant used instead of a gasket. An o-ring used in a brake valve.
A gasket use between two parts that do not move.

Question 7

The king pin of a trailer is locked into the fifth wheel assembly by backing a tractor up until

Answer 7

The kingpin triggers the jaw to slide into place

Question 8

Which type of fifth wheel assembly allows front to rear and side to side oscillation

Answer 8

Compensating and double oscillation

Question 9

Forces acting endwise on a rotating shaft create _________ bearing loads

Answer 9

Axial

Question 10

What are three advantages of using a sliding fifth wheel versus a stationary fifth wheel

Answer 10

Moving assembly forward allows for better maneuverability.
It’s easier to transfer weight between tractor axles.
The ability to accommodate trailers with different kingpin settings.

Question 11

Before installing a torque rod bushing it should be lubricated with what type of oil

Answer 11

Vegetable based

Question 12

A pintle hook must be replaced if the wear exceeds

Answer 12

3/16 of an inch

Question 13

When installing an aluminum part on to a steel frame you must

Answer 13

Use an anticorrosion compound

Question 14

Huck fasteners are used to attach components to frames because they do three things

Answer 14

Do not allow any movement.
Are extremely strong.
Do not allow components to flex.

Question 15

In most cases the length of time a component should be able to operate before failure is determined by the

Answer 15

Equipment manufacturers recommendations

Question 16

When you connect to two or more semi-trailers connected to a tractor by use of a fifth wheel coupling you have an

Answer 16

A train combination

Question 17

Which type of tire balancing can be completed with the tire assembly on or off the vehicle

Answer 17

Dynamic tire balancing

Question 18

If the wheels on a heavy on-highway vehicle are not installed parallel to the frame it will cause

Answer 18

Tracking problems.
Significant handling problems.
Tire scrubbing.

Question 19

If a vehicle equipped with airspring suspension tends to wander the problem may be

Answer 19

I leaking air spring.
A maladjusted ride height control valve.
Drive axles out of alignment.

Question 20

The ride height control valve on air spring suspension system maintains the

Answer 20

Distance between the vehicle frame and the axles

Question 21

The term used to describe when the frame of a vehicle is bent to one side is

Answer 21

Sidesway

Question 22

Using a breakdown maintenance schedule for a vehicle ,the maintenance is completed

Answer 22

Only when something breaks

Question 23

After installing a fifth wheel assembly it is important to test and adjust the lock jaws. When testing the kingpin should

Answer 23

Rotate with some resistance

Question 24

The label on a tube of grease states “premium grease EP3” the number 3 stands for the

Answer 24

NLGI grade

Question 25

Directional tires are tires that do what

Answer 25

Should be mounted so they rotate in a certain direction for self-cleaning

Question 26

What are three common reasons for the spring to break on a leafspring suspension

Answer 26

Not enough torque on the U-bolts. The vehicle has been overloaded. There has been excessive spring end play.

Question 27

What type of Seal is used on heavy duty equipment to keep contaminants out

Answer 27

Exclusion

Question 28

Give three examples of a van trailer

Answer 28

A livestock trailer.
A bulk material trailer.
A refrigerated trailer.

Question 29

Placing dual tires with a different section with on a heavy-duty vehicle will do what

Answer 29

Cause one tire to carry more of the load

Question 30

Forces perpendicular to the axis of a rotating shaft create __________. bearing loads

Answer 30

Radial

Question 31

What are three things that determine the amount of load that can be connected to a fifth wheel assembly

Answer 31

The vertical load to be carried.
The towed vehicle weight.
The maximum drawbar load.