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Chapter 26
End of Chapter Review Questions Answer Key
1. What is used to load the leaves in a spring pack under tension to provide its self–
dampening properties?
2. In an air suspension, what happens to the air in the air bags when a height control
valve lever is raised upward off horizontal?
3. A spring pack has a single cracked leaf. Technician A says that the spring pack should
be replaced as a unit. Technician B says that the fractured leaf can be repair welded
providing it is not the main leaf. Who is correct?
4. Axle alignment on a tandem rear leaf spring suspension is adjusted by:
5. A truck recently had both front spring packs replaced. The driver complains that it is
difficult to steer the truck straight ahead. Technician A says that this could be caused
by installing the caster shims backward. Technician B says that this condition could
be caused by seized spring pins. Who is correct?
6. Which of the following would be the most likely road handling result when a spring
pack centerbolt breaks on a front suspension?
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7. What is the function of torque arms on a suspension system?
8. The most compressed condition of a spring is known as:
9. A leaf-type spring suspension that has a variable deflection rate obtained by varying
the effective length of the spring assembly is known as:
10. What type of spring is usually mounted on top of heavy-duty truck rear spring
assemblies and is used only when a truck is under a heavy load?
11. What device is used primarily to absorb energy and dampen suspension oscillation?
12. What device is used to control the air in and out of the air springs in an air suspension
system?
13. Which type of air spring is mounted on a pedestal?
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14. A truck with an air suspension system is being unloaded. After unloading the truck,
the driver observes that one side rises. Technician A says that this could be caused by
a plugged quick-release valve. Technician B says that a defective leveling valve could
cause this problem. Who is correct?
15. When lubing a spring pack assembly, neither the fixed bracket spring pin nor the
shackle pin will take grease. What should you do first?