Two types of collection system maintenance is preventative and?

• A. Corrective
• B. Emergency
• C. Essential
• D. Intensive

Answer: (A)

Preventative maintenance and corrective maintenance are the two main ways to keep a wastewater collection system functioning. Preventative maintenance is planned work done to stop problems before they happen (like cleaning lines, inspecting assets, and testing pumps). Corrective maintenance is performed after a fault or failure is found, to repair or replace components and restore service. That pairing is standard, so corrective fits as the counterpart to preventative.

The other terms aren’t formal maintenance categories in this context. Emergency describes a rapid-response situation rather than a defined maintenance type, and essential or intensive aren’t used as standard maintenance classifications. For clarity, think of preventative as the proactive plans to prevent issues, and corrective as the reactive fixes after issues are detected.