CPE Facility Operations & Maintenance 5 — Questions and Answers
Question 1: What does the term 'deferred maintenance' refer to in facility management?
- Maintenance performed ahead of schedule to prevent failures
- Scheduled maintenance that is postponed due to budget or resource constraints (Correct answer)
- Maintenance performed by outside contractors
- Emergency repairs completed after equipment failure
Correct answer: Scheduled maintenance that is postponed due to budget or resource constraints
Deferred maintenance is necessary upkeep that has been postponed, often accumulating into a larger backlog with higher future costs.
Question 2: A plant engineer must calculate the economic justification for replacing an aging motor with a premium efficiency model. The key financial metric used is:
- Payback period based on annual energy cost savings (Correct answer)
- Motor nameplate horsepower rating
- Motor frame size and mounting configuration
- Total harmonic distortion of the power supply
Correct answer: Payback period based on annual energy cost savings
Simple payback period — capital cost divided by annual energy savings — is the standard metric for motor efficiency upgrade justification.
Question 3: Which maintenance document provides step-by-step instructions for performing a specific maintenance task safely and correctly?
- Equipment specification sheet
- Standard Operating Procedure (SOP) or Maintenance Procedure (Correct answer)
- P&ID (Piping and Instrumentation Diagram)
- Bill of Materials (BOM)
Correct answer: Standard Operating Procedure (SOP) or Maintenance Procedure
SOPs and maintenance procedures standardize how tasks are performed, ensuring safety, quality, and consistency across technicians.
Question 4: In a chilled water system, what does it mean when the chiller delta-T (supply vs. return temperature difference) is lower than design?
- The chiller is operating more efficiently than designed
- The system is experiencing low delta-T syndrome, indicating hydraulic imbalance or coil fouling (Correct answer)
- The chiller is oversized for current load
- Refrigerant is being overcharged
Correct answer: The system is experiencing low delta-T syndrome, indicating hydraulic imbalance or coil fouling
Low delta-T syndrome reduces chiller efficiency and capacity, commonly caused by coil fouling, poor flow distribution, or air handler bypass.
Question 5: Which regulation requires facilities to report and manage hazardous chemical inventories above threshold quantities?
- OSHA 29 CFR 1910.147 (LOTO)
- EPA EPCRA / SARA Title III Tier II reporting (Correct answer)
- NFPA 70 National Electrical Code
- ASME Boiler and Pressure Vessel Code
Correct answer: EPA EPCRA / SARA Title III Tier II reporting
EPCRA/SARA Title III requires facilities to report hazardous chemical inventories to state and local emergency planning committees.
Question 6: A maintenance team is experiencing frequent repeat failures on the same pump. The BEST long-term solution is to:
- Increase PM frequency on the pump
- Perform root cause analysis (RCA) to identify and eliminate the underlying cause (Correct answer)
- Stock more spare parts for the pump
- Switch to a different pump manufacturer
Correct answer: Perform root cause analysis (RCA) to identify and eliminate the underlying cause
Root cause analysis identifies why failures recur so the fundamental cause can be eliminated, not just the symptoms treated.
Question 7: What is the primary benefit of installing variable frequency drives (VFDs) on centrifugal pumps and fans?
- They increase the maximum flow capacity of the equipment
- They allow equipment to operate at speeds matched to actual demand, reducing energy consumption (Correct answer)
- They eliminate the need for mechanical shaft seals
- They provide automatic power factor correction
Correct answer: They allow equipment to operate at speeds matched to actual demand, reducing energy consumption
VFDs reduce motor speed to match actual load, and since centrifugal pump/fan power varies with the cube of speed, even small speed reductions yield large energy savings.
CPE Facility Operations & Maintenance 5
What does the term 'deferred maintenance' refer to in facility management?