CMM Cheat Sheet 2026

The 30 highest-yield CMM facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. When an electric fire pump is tested weekly under NFPA 25, how long must it run under no-flow (churn) conditions? → 10 minutes
2. During hot work, OSHA requires a fire watch to stay on post for at least how long after the work is finished? → 30 minutes
3. Which building envelope component has the greatest impact on reducing heating and cooling loads in most U.S. climates? → Roof and ceiling insulation
4. When a maintenance employee refuses to perform a task they believe is genuinely dangerous, what right does OSHA protect? → The right to refuse work when there is a reasonable belief of imminent danger
5. Banging noises in water piping when solenoid valves close quickly are most effectively corrected by which measure? → Installing water hammer arresters near the quick-closing valves
6. Under ADA Title III, existing public accommodations must remove architectural barriers when removal is: → Readily achievable
7. For general vibration monitoring of fans and pumps, which measurement unit is most commonly trended? → Velocity in inches per second
8. Approximately how much does one gallon of water weigh? → 8.34 pounds
9. How should hazardous conditions be handled during safety procedures work? → Stop work, secure the area, report the hazard, and follow safety protocols
10. Occupants report headaches and fatigue that go away soon after they leave the building, and no specific cause can be found. This is best described as: → Sick building syndrome
11. How often does OSHA require a periodic inspection of energy control procedures? → At least annually
12. After root cause analysis shows a recurring deficiency comes from unclear task instructions, which corrective action is most effective? → Revising the task procedures and retraining staff
13. Under NFPA 101, what is the required annual test duration for battery-powered emergency lighting? → 90 minutes
14. Which term describes the official or agency responsible for enforcing a code and approving installations? → Authority Having Jurisdiction (AHJ)
15. When mold is found in an occupied building, what is the most important first step in remediation according to EPA guidance? → Identify and fix the moisture source
16. Before a technician enters a permit-required confined space such as a sewage wet well, what must happen first under OSHA 1910.146? → Atmospheric testing and a completed entry permit
17. Which NFPA document addresses maintenance programs for electrical equipment such as switchgear, transformers, and panelboards? → NFPA 70B
18. Which wood product is best for exterior framing in direct ground contact? → Pressure-treated lumber rated for ground contact
19. Stormwater discharges from certain industrial and construction sites are regulated through which permit program? → NPDES permits under the Clean Water Act
20. Which metric best reflects quality from the occupant's point of view? → Customer satisfaction survey results
21. Using the sensible heat formula, what load is carried by 1,000 CFM with a 20°F temperature difference? → 21,600 BTU/h
22. What is a common consequence of over-greasing motor bearings during PM? → Seal damage and overheating of the bearing
23. What is the primary purpose of a reserve study for a facility? → To plan funding for future replacement of major building components
24. A pump gauge shows 10 psi of pressure. Approximately how many feet of water head does this represent? → 23.1 feet
25. What minimum strength must a personal fall arrest anchorage have for each attached worker when it is not designed by a qualified person? → 5,000 pounds
26. A restroom partition replacement needs high moisture and graffiti resistance. Which material fits best? → Solid high-density polyethylene (HDPE)
27. Which type of lighting control system automatically adjusts light levels based on the amount of natural daylight entering a space? → Daylight harvesting (photosensor control)
28. What is the EPA's recommended action level for indoor radon concentration? → 4 pCi/L
29. Under the IFC, if a fire sprinkler system is out of service for more than how long in a 24-hour period, the owner must evacuate or provide a fire watch? → 10 hours
30. A maintenance supervisor notices a pattern of repeated absenteeism in one technician. What is the BEST first step? → Document the absences and schedule a private counseling meeting