During inspection, what is not acceptable for brake fittings?

In the context of brake fittings during a pre-trip inspection, any abrasions or bulges are considered unacceptable because they can indicate potential weaknesses or failures in the brake system. Abrasions may lead to the deterioration of brake lines, which can result in leaks or failure to operate effectively. Bulges in brake fittings can signify dangerous stress or damage that could ultimately compromise the integrity of the braking system.

On the other hand, secure connections, the absence of visible leaks, and proper alignment are crucial elements for ensuring that the brake system operates safely and efficiently. Secure connections prevent disconnections while driving, no visible leaks ensure that the brake fluid remains at the required levels for effective braking, and proper alignment helps in delivering consistent braking performance. Thus, these conditions are essential for optimal brake function and safety on the road.