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Difficulty: MediumExterior Lights and Reflectors Inspection

Prior to stepping outside the cab to verify that exterior lamps and reflectors are clean and functional, a commercial driver must prepare the vehicle's lighting controls. Which procedure should the driver complete inside the cab before starting the walk-around to inspect the low-beam headlights and flashers?

  1. A
    Leave the ignition switch in the run position without setting the parking brakes, and verify all exterior bulb functions solely by checking the dashboard instrument cluster indicators.
  2. Set the parking brakes, turn off the engine, take the ignition key, and switch on the low-beam headlights and four-way emergency flashers.Answer
  3. C
    Leave the engine running at high idle with the parking brakes released, and switch on the high-beam headlights while leaving the hazard flashers disengaged.
  4. D
    Activate only the left turn signal with the engine running, leave the key in the starter switch, and assume all side clearance lamps illuminate on the same circuit.

Answer

The driver must set the parking brakes, turn off the engine, take the ignition key, and switch on the low-beam headlights and four-way emergency flashers before exiting the cab.
According to standard commercial motor vehicle inspection procedures, the driver must set the parking brakes, turn off the engine, remove the key for safety, and switch on the low-beam headlights and four-way emergency flashers before performing the exterior walk-around check.

Step-by-Step Solution

1
Secure the commercial vehicle before exiting the cab.
The parking brakes are set, the engine is stopped, and the ignition key is removed and placed in the driver's possession to prevent unintended vehicle movement or unauthorized start-up.
Vehicle securement is a mandatory safety requirement before conducting any exterior inspection.
2
Activate the required lighting circuits for the initial exterior walk-around.
The low-beam headlights and four-way emergency hazard flashers are switched on.
This configuration allows the driver to walk around the entire vehicle to visually verify headlight operation, front and rear hazard flashers, clearance lamps, and lens condition in a single systematic pass.

Key Concept

Pre-trip exterior lighting inspection setup and safety procedure
Estimated Time:1m 0s
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Topics

Exterior Lights and Reflectors Inspection

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