Facility Operations & Maintenance Flashcards
7 cards from real CSA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Facility Operations & Maintenance flashcards as text
A facility's chiller plant is experiencing low delta-T syndrome. What does this condition indicate?
Answer: Chilled water supply and return temperatures are too close together, reducing system efficiency
Low delta-T syndrome occurs when return water temperature is too close to supply temperature, increasing pump energy and reducing chiller efficiency.
What is the primary purpose of an infrared (IR) thermography scan during a facility electrical inspection?
Answer: Detect hot spots indicating loose connections, overloads, or failing components
IR thermography identifies abnormal heat signatures in electrical systems that indicate potential faults before they cause failures or fires.
Under NFPA 70E, what is the primary goal of an Arc Flash Hazard Analysis?
Answer: Determine incident energy levels to select appropriate PPE for electrical work
Arc flash analysis calculates potential energy released during an arc flash event to establish safe work boundaries and required PPE categories.
Which grounding system is commonly required in data centers to minimize electromagnetic interference and ensure equipment safety?
Answer: Mesh bonding network (MBN) / signal reference grid
A mesh bonding network or signal reference grid equalizes potential across all equipment frames, reducing EMI and protecting sensitive electronics.
What is the correct order of priority in a hierarchy of controls for hazard mitigation in facility operations?
Answer: Elimination → Substitution → Engineering controls → Administrative controls → PPE
NIOSH/OSHA hierarchy places elimination as most effective and PPE as least effective, progressing from most to least protective.
A facility manager is reviewing a cooling system and notes the 'approach temperature' of the cooling tower is increasing. What does this indicate?
Answer: Cooling tower performance is degrading, likely due to fouling or scaling
Approach temperature is the difference between leaving water temperature and ambient wet-bulb; an increase signals reduced heat transfer efficiency due to fouling.
Which type of electrical testing verifies the integrity of insulation on cables and prevents current leakage between conductors?
Answer: Insulation resistance (Megger) testing
Insulation resistance testing (megohmmeter testing) applies high DC voltage to measure resistance between conductors, detecting degraded insulation.