Operations and Maintenance Flashcards

What is the primary purpose of a SCADA system in utility operations?

Answer: Remote monitoring and control of infrastructure

SCADA (Supervisory Control and Data Acquisition) systems allow operators to remotely monitor and control utility infrastructure such as pumps, valves, and treatment processes.

Which maintenance strategy involves replacing components at fixed time intervals regardless of condition?

Answer: Preventive maintenance

Preventive maintenance replaces or services components on a scheduled basis to prevent failures before they occur, regardless of current condition.

A utility operator notices increased vibration in a pump. What is the MOST appropriate immediate action?

Answer: Document and investigate the cause before operating further

Unusual vibration can indicate misalignment, cavitation, or bearing failure; documenting and investigating protects both equipment and operators.

What does the term 'infiltration' mean in the context of wastewater collection systems?

Answer: Groundwater entering sewer pipes through cracks or joints

Infiltration is the entry of groundwater into sewer pipelines through defects, increasing flow volumes and treatment costs.

Which chemical is most commonly used for primary disinfection in drinking water treatment?

Answer: Chlorine

Chlorine is the most widely used primary disinfectant in drinking water treatment due to its effectiveness and residual protection.

What is the function of a check valve in a water distribution system?

Answer: Prevent backflow

Check valves allow flow in only one direction, preventing backflow that could contaminate the distribution system.

Which regulatory standard sets maximum contaminant levels (MCLs) for public drinking water systems in the US?

Answer: Safe Drinking Water Act

The Safe Drinking Water Act (SDWA) authorizes the EPA to set MCLs and treatment techniques for public water systems.