While performing the pre-trip air brake check on a combination vehicle, you also check that the trailer's air lines connect properly at the glad hands. What are you making sure of?

Pick an answer

1. That the connections are secure and sealed, without leaks, so both the service and supply lines charge the trailer correctly
2. That the glad hands match the color of the tractor
3. That the glad hands are painted the correct color
4. Only that the connections look tight, without checking for actual leaks, which a hose that is pulling air can still pass by eye

Correct!

Not quite. The correct answer is highlighted.