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Decreasing the Driving Forces and Increasing the Restraining Forces

question 58

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Decreasing the driving forces and increasing the restraining forces:

Assess the reasons for and implications of different fifth wheel and upper coupler issues (e.g., high hitch condition, distorted bolster plates).
Understand the types and components of 5th wheels used in the trucking industry.
Recognize the couplings and connections in different trailer combinations.
Identify the procedures and tools for inspecting and maintaining kingpins and upper couplers.

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