What is the maximum duration for the step involving 70% capacity in a pump test?

In a pump test for fire apparatus, the maximum duration for operating the pump at 70% capacity is typically set to 10 minutes. This duration is established to ensure the equipment's performance can be assessed effectively without incurring unnecessary wear and tear on the pump or risking overheating. Operating at a reduced capacity allows for proper evaluation of how the pump handles real-world scenarios while still protecting the apparatus's integrity.

Extended durations beyond this limit can lead to misrepresentations of the pump's operational capabilities or could potentially introduce mechanical issues if the equipment is pushed beyond its recommended limits. Therefore, adhering to a 10-minute maximum for the 70% capacity step ensures both efficiency in testing and the longevity of the fire apparatus being evaluated.