Maintenance Protocols Flashcards

Under NFPA 110, how often should an emergency generator be exercised under load?

Answer: Monthly for at least 30 minutes

NFPA 110 requires monthly exercise under load for at least 30 minutes for Level 1 and 2 emergency power systems.

Under NFPA 101, what is the required annual test duration for battery-powered emergency lighting?

Answer: 90 minutes

Battery emergency lights must operate for 90 minutes during the annual test, with 30-second functional tests monthly.

A technician finds a work order for a slow-draining sink and another for a ruptured pipe flooding an electrical room. How should the manager prioritize?

Answer: Ruptured pipe as an emergency, sink as routine

Work orders involving life safety, property damage, or critical systems are emergencies and come before routine requests.

Which predictive maintenance technique is BEST for detecting loose or overheating electrical connections in a switchgear panel?

Answer: Infrared thermography

Infrared thermography spots hot spots caused by loose, corroded, or overloaded electrical connections without shutting down equipment.

How often does OSHA 1910.147 require a periodic inspection of each energy control (lockout/tagout) procedure?

Answer: At least annually

OSHA requires the employer to inspect each energy control procedure at least annually.

What is a common consequence of over-greasing motor bearings during PM?

Answer: Seal damage and overheating of the bearing

Excess grease causes churning, heat buildup, and blown seals, which can lead to early bearing failure.

Which metric measures the average time it takes to repair a failed asset and return it to service?

Answer: MTTR

Mean Time To Repair (MTTR) averages the time from failure until the asset is back in service.