What can cause an excessively large brake cylinder stroke?

The selected combination of answers is correct because both a defective automatic slack adjuster and worn mountings on the transmission system can lead to an excessively large brake cylinder stroke. According to German traffic regulations, specifically those related to vehicle safety and maintenance, proper functioning of the braking system is crucial for ensuring safe driving.

A defective automatic slack adjuster can prevent the proper adjustment of the brake shoes to the drum, causing the brakes to engage less effectively, which increases the stroke needed to achieve braking. Worn mountings on the transmission system can also allow for misalignment or excessive movement, affecting how the braking force is transmitted and leading to inefficiencies.

Both issues can compromise the vehicle's braking performance, potentially leading to safety hazards on the road. It is important to address these mechanical issues to comply with German road safety laws.