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
In HVAC terminology, what does 'DOAS' stand for and what is its primary function?
Answer: Direct Outdoor Air System — conditions and delivers 100% outside air to buildings
A DOAS conditions 100% outdoor air before it enters occupied spaces, separating ventilation from space conditioning.
A facility experiences frequent nuisance tripping of circuit breakers on a 20A circuit. What is the most likely cause?
Answer: Connected load consistently exceeds 80% of circuit capacity
NEC guidelines recommend loading circuits to no more than 80% of rated capacity; sustained loads above this cause thermal tripping.
What is the purpose of a 'raised floor' system in a data center?
Answer: Create a plenum for distributing conditioned air and routing cables
Raised floors create a pressurized plenum below the floor that routes cold air to equipment and can also manage cable pathways.
Which ASHRAE standard specifically addresses ventilation requirements for acceptable indoor air quality in commercial buildings?
Answer: ASHRAE 62.1
ASHRAE Standard 62.1 establishes minimum ventilation rates and IAQ requirements for commercial and institutional buildings.
A facility manager wants to reduce water consumption in cooling towers. Which approach directly reduces evaporative water loss?
Answer: Raising the cycles of concentration
Raising cycles of concentration allows more dissolved solids before blowdown is needed, reducing total makeup water consumption.
What type of maintenance is being performed when a technician uses oil analysis to monitor lubricant degradation in rotating equipment?
Answer: Predictive (condition-based) maintenance
Oil analysis monitors equipment condition in real time to predict failures before they occur, which is the definition of predictive maintenance.
Which document defines the minimum performance requirements for new commercial building energy systems in the United States?
Answer: ASHRAE 90.1
ASHRAE 90.1 sets minimum energy efficiency standards for commercial buildings and is adopted by most US state energy codes.