Red Seal Truck and Transport Mechanic Practice Exam

What is a common method used to check brake pad thickness?

1. Digital inspection

2. Visual inspection or using a gauge

3. Field calibration

4. Pressure testing

The correct answer is: Visual inspection or using a gauge

Visual inspection or using a gauge is a common method employed to check brake pad thickness because it allows for a straightforward assessment of the wear on the brake pads. Mechanics often perform a visual inspection to quickly identify if the pads are wearing down beyond the manufacturer’s specifications. Additionally, a gauge can provide a more precise measurement, helping to determine if the brake pads need replacement. This method is preferred as it can be easily conducted during routine maintenance checks or during brake servicing. In contrast, digital inspection typically requires specific equipment and technical skills that may not always be readily available. Field calibration and pressure testing do not pertain to the direct assessment of brake pad thickness, as they involve different procedures related to overall brake system performance rather than assessing the condition of the brake pads themselves.