Utility Operations & Infrastructure Flashcards
7 cards from real UMC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Utility Operations & Infrastructure flashcards as text
What is the significance of a 'maximum contaminant level' (MCL) in drinking water regulation under the Safe Drinking Water Act?
Answer: The highest permissible level of a contaminant in public water systems
MCLs are legally enforceable standards set by the EPA specifying the maximum concentration of a contaminant allowed in water delivered to customers.
In electric transmission planning, 'N-1 contingency' refers to the system's ability to:
Answer: Continue operating reliably after any single component fails
N-1 contingency planning ensures that the loss of any one element—a line, transformer, or generator—does not cause cascading failures or load shedding.
A water utility's 'master meter' serves which primary purpose?
Answer: Measuring total water entering a pressure zone or district metered area
Master meters measure the bulk volume of water entering a defined zone, enabling utilities to calculate non-revenue water by comparing input to billed consumption.
What operational practice is used by gas utilities after pipeline maintenance to verify line integrity before returning it to service?
Answer: Pressure testing (hydrostatic or pneumatic)
Pressure testing subjects the repaired pipeline segment to a test pressure exceeding its maximum allowable operating pressure to confirm there are no leaks or structural deficiencies.
Which financial metric best measures how efficiently a utility converts revenue into operating income?
Answer: Operating ratio (operating expenses / operating revenue)
The operating ratio—expressed as operating expenses divided by operating revenue—measures operational efficiency; a lower ratio indicates that more revenue is retained after covering operating costs.
In wastewater collection systems, what does 'inflow and infiltration' (I&I) primarily refer to?
Answer: Stormwater and groundwater entering the sanitary sewer system through defects or connections
I&I describes unwanted water entering sanitary sewers—infiltration from groundwater through pipe cracks and inflow from improper stormwater connections—which overloads treatment plants.
A utility implementing 'advanced metering infrastructure' (AMI) gains which operational advantage over traditional meters?
Answer: Two-way communication enabling remote reads, outage detection, and usage analytics
AMI systems enable two-way communication between meters and utility systems, supporting remote meter reading, real-time outage detection, tamper alerts, and granular consumption data.