What may occur if the brake hoses are not connected correctly?

When brake hoses are not connected correctly, it can lead to air leaks or ineffective braking. The brake system of a train relies heavily on the proper distribution and pressure of air through the hoses to function effectively. If the hoses are misconnected, it can disrupt the necessary flow of compressed air, resulting in insufficient pressure being delivered to the brake cylinders. This can cause the brakes to either fail to engage properly or not provide the required stopping force, leading to potential safety hazards during operation.

In contrast, options like excessive braking pressure, increased fuel consumption, or improved stopping distance do not align with the consequences of poorly connected brake hoses. Excessive braking pressure might suggest a malfunction in the air pressure control system rather than a hose connection issue, while increased fuel consumption and improved stopping distance are unrelated to the functioning of brake hoses and more about the operational efficiency and mechanics of the train.