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Question

Difficulty: MediumEngine Compartment Inspection

A driver is inspecting the steering system components located along the frame rail inside the engine compartment. Which finding indicates an unsafe mechanical defect that requires repair before operating the vehicle?

  1. A
    Steering wheel free play measuring 1.5 inches on a 20-inch steering wheel before the front wheels respond
  2. Worn or loose ball-and-socket joints along the steering drag link and tie rodAnswer
  3. C
    A steer axle brake chamber pushrod that travels 1 inch when pulled firmly by hand
  4. D
    Front steer tires that measure exactly 4/32 inch of remaining tread depth in all major grooves

Answer

Worn or loose ball-and-socket joints along the steering drag link and tie rod
During an engine compartment inspection, all mechanical steering linkage components—including the pitman arm, drag link, steering arms, and tie rod—must be checked to ensure that joints and sockets are not worn, loose, or cracked, and that all fasteners are securely in place.

Step-by-Step Solution

1
Identify the target system and location specified in the scenario
The inspection focuses specifically on the steering mechanism and linkage located inside the engine compartment along the frame rail.
CDL pre-trip guidelines require inspecting the steering gear box, pitman arm, drag link, steering arms, and tie rod for security and mechanical integrity.
2
Evaluate the condition of mechanical joints and linkages under CDL safety standards
Linkage joints and sockets must not be worn, loose, cracked, or missing cotter keys/fasteners.
Excessive play or worn sockets in the steering linkage can lead to complete separation of steering control while driving.
3
Distinguish between allowable tolerances and immediate mechanical defects
Normal steering wheel free play (under 2 inches) and compliant steer tire tread (4/32 inch) are acceptable, making worn linkage ball-and-socket joints the only critical defect.
Components with zero tolerance for loose or worn joints must be repaired before vehicle operation.

Key Concept

Engine Compartment Steering Linkage Inspection
Estimated Time:1m 0s
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Topics

Engine Compartment Inspection

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