CHFM - Certified Healthcare Facility Manager Building Utility Systems Flashcards

In a healthcare facility, what is the primary function of a pressure-reducing valve (PRV) in a domestic water system?

Answer: To reduce incoming water pressure to a safe operating level for the building

A pressure-reducing valve (PRV) reduces the incoming municipal water pressure to a lower, controlled pressure suitable for the building's plumbing system, protecting pipes and fixtures from damage.

Which type of electrical distribution system provides the highest level of power reliability for critical healthcare loads?

Answer: Redundant feeders with automatic transfer switches

Redundant feeders with automatic transfer switches (ATS) provide the highest reliability by automatically switching to a backup feeder if the primary fails, ensuring continuous power to critical loads.

What is the purpose of a P-trap in a plumbing drain system?

Answer: To maintain a water seal that prevents sewer gases from entering the building

A P-trap holds a small amount of water that creates a seal blocking sewer gases (including toxic and flammable gases) from migrating back through the drain into the occupied space.

A healthcare facility's chilled water system uses a cooling tower. What is the primary water quality concern specific to cooling towers?

Answer: Legionella bacteria growth in warm, aerated water

Cooling towers provide ideal conditions for Legionella pneumophila growth: warm water (77-113°F), stagnant areas, and aerosolization that can spread bacteria to building occupants, making water treatment and monitoring critical.

In electrical systems, what does a ground fault circuit interrupter (GFCI) protect against?

Answer: Electrical shock from small current leaks to ground

A GFCI monitors the difference between current flowing in the hot and neutral conductors; if it detects a difference of as little as 5 milliamps, it trips within milliseconds to prevent electrocution.

What NFPA standard governs the installation and maintenance of emergency and standby power systems in healthcare facilities?

Answer: NFPA 110

NFPA 110 covers the performance requirements, installation, maintenance, and testing of emergency and standby power systems including generators, transfer switches, and associated wiring in healthcare and other occupancies.