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Exam 5: Shock Absorbers and Struts

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Question 21

True/False

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Conventional and heavy-duty shock absorbers have the same design features to prevent heat buildup.

A) True
B) False

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Question 22

Multiple Choice

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On a vehicle with a MacPherson strut front suspension system, there is a grinding noise coming from the right front area during low-speed parking lot maneuvers. What is the most likely cause?

A) Worn outer tie rod
B) Loose power steering drive belt
C) Weak strut cartridge
D) Worn upper strut bearing

E) None of the above
F) B) and C)

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Question 23

Multiple Choice

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Worn-out shock absorbers or struts may cause:

The magneto-rheological fluid used in some shock absorbers and struts contains:

Technician A says shock absorbers should be replaced if there is a slight oil film on the lower tube. Technician B says shock absorbers should be replaced if they have severe dents in the lower tube. Who is correct?

When turning the front wheels to the right or left, strut chatter may indicate a binding upper strut mount.

Technician A says most shock absorbers and struts have a 50/50 ratio. Technician B says a strut with a 70/50 ratio has more resistance to movement on the extension cycle. Who is correct?

Technician A says when performing a shock absorber manual test, the shock absorber's resistance to movement may be greater on the rebound stroke compared with the compression stroke. Technician B says if the shock absorber's resistance to movement is jerky and erratic, shock absorber replacement is necessary. Who is correct?

Shock absorbers containing a nitrogen gas charge provide a less positive shock absorber action compared with shock absorbers without a gas charge.

When a strut adjustment knob is set to a higher number, how does this affect the performance?

What is the purpose of the rubber spring bumper on the strut piston rod?

Excessive chassis oscillations may result in loss of steering control.

Explain what shock absorber/strut ratio is.

What are shock absorbers/struts matched to on the suspension system?

When removing a coil spring from a strut, some spring tension should be left on the upper strut mount before loosening the strut rod nut.

Describe the spring action with a worn-out shock absorber.

Technician A says when the suspension height is normal, the valve orifices in a travel-sensitive strut provide more resistance to oil movement. Technician B says a travel-sensitive strut provides more resistance to oil movement when the speed of upward or downward wheel movement increases. Who is correct?

Technician A says load-leveling rear shock absorbers use a vent solenoid to release air from the shock absorbers and lower the rear suspension height. Technician B says an onboard compressor forces air into the rear load-leveling shock absorbers to raise the rear suspension height. Who is correct?

Technician A says an enamel-coated coil spring should be taped in the areas where the spring compressor tool contacts the spring. Technician B says if the enamel coating is chipped on a coil spring, the spring deflection rate is reduced. Who is correct?

During normal strut operation: