Final answer:
The maximum rating of the system, based on the provided choices and given that 125 lbs is not the maximum, would be 150 lbs, as it is the next highest option available.
Step-by-step explanation:
The question appears to be related to the rating of a component within a steam system, likely touching on pressure rating or the maximum working pressure of the system. Given that the false statement mentions a 125lbs rating, and the context suggests we need to determine the actual maximum rating, the answer would be the rating closest to, but not below 125lbs, as it's stated that 125lbs is not the maximum. Thus, the maximum rating of the system would be the next highest rating available from the options provided.
Among the choices given, the only rating higher than 125lbs but also the smallest increase from it is 150lbs. Therefore, the maximum rating of the system is most likely to be 150 lbs. This assumes that the ratings provided are the only possible options and that the statement is guiding us toward a higher value.