Red Seal Truck and Transport Mechanic Practice Exam

What is typically the first step in troubleshooting an air leak on a truck?

1. Visual inspection

2. Replacing hoses

3. Listening for hissing sounds

4. Checking brake functionality

The correct answer is: Visual inspection

The first step in troubleshooting an air leak on a truck is a visual inspection. This involves closely examining the air system components, such as hoses, connections, and valves, for signs of wear, damage, or loose fittings. A thorough visual inspection can help identify obvious issues such as cracked hoses or disconnected fittings, which are often the source of air leaks. Conducting an initial visual inspection allows the mechanic to gain insights into the condition of the system before proceeding to other steps such as listening for hissing sounds or testing brake functionality. By identifying visible defects early on, time can be saved in pinpointing the exact location of the leak and managing repairs more effectively.