B - Frame and Suspension Service

Question 1

One possible cause for frame sideway is:

Answer 1

An accident, collision or rollover.

Question 2

The difference between frame sag and bow is:

Answer 2

A sagged frame is bent downward while a bowed frame us bent upward.

Question 3

Corrosion of frame material can be a result of:

Answer 3

Climatic conditions (rain, snow, ambient temperature), exposure to certain cargo materials, and contact between two dissimilar metals such as aluminum and steel

Question 4

Four factors that accelerate frame stress and therefore the possibility of frame cracking are:

Answer 4

Overloading, unevenly distributed load, operating on rough terrain, and loose or worn cross member attaching bolts.

Question 5

True or False: Improper frame alignment can be a source of tracking and alignment problems.

Answer 5

True.

Question 6

When marking a frame trail, you should use:

Answer 6

Chalk or soapstone.

Question 7

Two reasons for using hardened washers on bolted frame connections are:

Answer 7

To prevent the head the bolt and nut from embedding into the attached part or frame rail and to help distribute the load preventing localized over stressing of frame parts.

Question 8

One advantage of using Huck fasteners for attaching frame components is they:

Answer 8

Do not allow flexing of frame components.

Question 9

True or False: Heat-treated frame rails must be heated in order to straighten them.

Answer 9

False.

Question 10

A vehicle equipped with a leaf spring suspension is leaning to one side. A possible cause of this fault is:

Answer 10

Broken leaf springs.

Question 11

What are possible causes for an air spring suspension to bottom.

Answer 11

Low system air pressure, excessive ride system air leakage, air spring cut or punctured, maladjusted ride height control valve, or faulty ride height control or dump valve.

Question 12

State the procedure for checking shock absorber operation.

Answer 12

Remove the lower shock mount and then pull the shock piston rod out and push it in 4 or 5 times. you should feel resistance to shock absorber movement in both directions but greater resistance when the piston rod is pulled out.

Question 13

True or False: It is acceptable to replace a single leaf in a leaf spring assembly if an individual leaf is damaged.

Answer 13

False.

Question 14

A compound like Alumilastic is used on the surfaces of aluminum suspension components that contact other metals because it:

Answer 14

Prevents corrosive reactions.

Question 15

The thrust from a properly aligned drive axle will act:

Answer 15

Along the frame centreline.

Question 16

Equalizer beam end bushing clearance can be checked by:

Answer 16

Jacking the beam end up with a hydraulic jack and checking beam end movement.

Question 17

The best way to remove equalizer beam end and centre bushings is to:

Answer 17

Use appropriate presses and pullers.

Question 18

The difference between bar pin and other types of equalizer beam end bushings is that:

Answer 18

They provide a point of axle alignment adjustment.

Question 19

Rubber load cushions have a durometer number that indicates:

Answer 19

The hardness of the rubber cushion which determines its load capacity.

Question 20

Drivers must drain air reservoirs at least daily in order to ensure that the:

Answer 20

Moisture and contamination in the reservoirs will be removed.

Question 21

True or False: The driver will have difficulty connecting a tractor to a trailer if the ride height on the air spring suspension is adjusted too high.

Answer 21

True.

Question 22

When the load is removed from a vehicle equipped with an air spring suspension, the ride height control valve will:

Answer 22

Exhaust air from the air springs until the correct ride height is reached.

Question 23

True or False: Adjusting the ride height on an air spring suspension that is equipped with an adjustable valve mounting is accomplished by making a linkage adjustment.

Answer 23

False.