What are some skills necessary for successful completion of the skills test?

Shifting gears, backing up, and performing parking maneuvers are essential skills for successfully completing a skills test for driver certification, particularly in a commercial context. These skills demonstrate an operator's ability to handle a vehicle in various situations that are commonly encountered on the road.

Shifting gears is crucial for controlling vehicle speed and power, especially when driving larger commercial vehicles that may require more complex gear changes. Backing up is equally important, as it reflects the operator's awareness of their surroundings and their ability to maneuver the vehicle in reverse safely. Performing parking maneuvers showcases a driver's capability to park the vehicle appropriately in different types of parking scenarios, which is a vital part of operating a vehicle in commercial settings.

The other options do not encompass the range of practical skills required for the skills test. Speed driving and swerving are not relevant to the assessment of safe and responsible operation, while adjusting mirrors and tire pressure, although important for vehicle preparedness, do not directly contribute to the driving test performance itself. Only backing up and parking lacks the broader skill set necessary for thorough evaluation.