CDL Vehicle Combination Practice Test

When coupling the glad hands, which of the following actions should be avoided?

1. Cross air supply lines to test for leaks

2. Ensure proper alignment of the glad hands

3. Check for visible damage on the glad hands

4. Use appropriate gloves while handling

The correct answer is: Cross air supply lines to test for leaks

When coupling the glad hands, crossing the air supply lines to test for leaks should be avoided because doing so can cause air to flow in unintended directions, compromising the air supply system and leading to possible air loss. The test for leaks is typically performed by checking for hissing sounds or using soapy water on the connections, rather than altering the configuration of the connections themselves. Proper actions such as ensuring alignment of the glad hands, checking for visible damage, and using appropriate gloves are critical to maintaining safety and functionality. Ensuring the glad hands are aligned minimizes the risk of accidental uncoupling and ensures a secure connection. Additionally, inspecting for visible damage helps identify any potential issues that could lead to failure during operation. Using gloves can also enhance grip and protect your hands from potential injuries while handling equipment.