Final answer:
Glad hand connections should be connected at a 90-degree angle to ensure a proper seal and prevent air leaks. This is important for the safety and proper functioning of the vehicle's braking system.
Step-by-step explanation:
When connecting glad hand connections to a trailer, they should be connected at a 90-degree angle. The glad hand connections are used to connect the air brake system of the tractor to the trailer.
It is important to connect the glad hand connections at a 90-degree angle to ensure a proper seal. This angle helps to prevent air leaks and ensures a secure connection between the tractor and trailer.
Connecting the glad hand connections correctly is crucial for the proper functioning of the braking system, which is essential for the safety of the vehicle. Incorrect angles or loose connections can lead to brake failure, resulting in accidents.