Why is discharging loads while moving considered poor practice?

Discharging loads while moving is considered poor practice primarily because it can lead to instability, particularly on uneven ground. When a forward tipping dumper is in motion, its center of gravity can change dynamically. If the machine is not stationary when discharging, the shifting weight can cause the vehicle to tip over or lose balance, especially if the terrain is not level. Uneven ground increases this risk, as the dumper may not be able to safely distribute the load while in motion, thereby compromising operator safety and the stability of the machine.

The other choices, while they may touch on relevant points, do not directly address the critical safety concern associated with moving while discharging. For instance, productivity risks involve how efficient operations may be hindered, but they do not prioritize stability. Additionally, while continuous movement might have some effect on a machine's lifespan or complicate load measurements, these factors are secondary to the more immediate risk of tipping and losing control during discharge.