Final answer:
A P&ID is a schematic representation of a process system that includes equipment, piping, instrumentation, and controls. It shows lines and instrumentation but not chemical reactions or operating procedures.
Step-by-step explanation:
A P&ID, or a piping and instrumentation diagram, is a schematic representation of a process system that includes the equipment, piping, instrumentation, and controls. On a P&ID, you would expect to see lines and instrumentation, such as valves, pumps, and meters, which indicate the flow and control of fluids in the process. You may also see maintenance equipment, such as filters or heat exchangers, that are essential for the proper functioning of the process. However, you would not expect to see the chemical reactions in a process or operating procedures on a P&ID.