Final answer:
There are two types of electric charge, but the information about materiel management systems cannot be accurately addressed with the data provided. The answer references electrical classifications instead.
Step-by-step explanation:
The student has asked about the types of inquiries in the materiel management system, but the information provided references the types of electric charge. To clarify this discrepancy, the correct answer to the given reference about electric charge is that there are two types of electric charge. However, without further specific context about the materiel management system, we cannot accurately answer the number of inquiry types within that system. If referring to electrical classifications of materials based on conductivity, the two main categories are conductors, in which charges can move freely, and insulators, in which charges cannot move freely.