What is the purpose of the P-100's fuel indicator?

The purpose of the P-100's fuel indicator is to check the fuel level. This function is crucial for ensuring that the pump operates effectively and is supplied with the necessary fuel to maintain its performance. Monitoring the fuel level allows operators to assess how much fuel is available and to prevent running out during operations. This is especially important in emergency situations where consistent pumping capability is vital for effective damage control efforts.

While the other options touch on important aspects related to fuel, they do not accurately capture the primary function of the fuel indicator itself. For instance, preventing fuel spills and assessing fuel quality are additional considerations in fuel management, but they do not define the indicator's main role. Monitoring fuel usage might relate to operational efficiency, but again, it is not the direct purpose of the fuel indicator.