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Difficulty: Very hardRetarders Usage and Cautions

Since electromagnetic and hydraulic driveline retarders operate independently of the engine's internal compression, they are exempt from the standard safety rule requiring drivers to turn off auxiliary retarders when navigating wet, icy, or snow-covered downgrades.

Answer: Answer

Answer

False
The statement is false because the specific mechanism of the retarder does not change where the braking force is applied. All auxiliary retarders act on the drive wheels. Applying any retarder on a slippery surface can induce a loss of traction and a potential jackknife.

Step-by-Step Solution

1
Analyze the technical distinction presented in the statement.
The statement claims electromagnetic and hydraulic retarders are exempt from poor-weather rules because they operate independently of engine compression.
To identify the core premise and logic being tested.
2
Evaluate how all auxiliary retarders interact with the vehicle's dynamics.
All four types of retarders (exhaust, engine, hydraulic, and electric) ultimately apply their retarding force to the drive wheels.
To determine the physical cause of the hazard on slippery roads.
3
Apply the general CDL safety rule for retarder usage in adverse conditions.
Because applying retarding force to the drive wheels on a slick surface can cause a drive-wheel skid or jackknife, all retarders must be turned off when the road is wet, icy, or snow-covered, with absolutely no exemptions for specific technologies.
To reach the final conclusion about the statement's validity.

Key Concept

All types of auxiliary retarders apply braking force to the drive wheels and must be turned off on slippery surfaces to prevent traction loss and skidding.
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Topics

Retarders Usage and Cautions

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