Mixed Deck — All CMM Topics Flashcards

A near-miss occurs when a ceiling tile falls next to a technician without injury. What is the BEST response?

Answer: Investigate root cause and record the near-miss

Near-miss investigation identifies hazards before they cause injury, though near-misses are not OSHA 300 recordable.

Per the ADA Standards, what is the minimum clear width of a doorway on an accessible route?

Answer: 32 inches

Doorways must give at least 32 inches of clear width with the door open 90 degrees.

What does LEED stand for in the context of green building certification?

Answer: Leadership in Energy and Environmental Design

LEED (Leadership in Energy and Environmental Design) is a globally recognized green building rating system developed by the U.S. Green Building Council.

What code compliance requirement applies to equipment operation?

Answer: All work must comply with applicable local, state, and national codes

Code compliance is mandatory for all work, ensuring safety, quality, and legal adherence.

What document from the building department confirms that a new or altered building complies with code and may be occupied?

Answer: Certificate of Occupancy

A Certificate of Occupancy is issued after final inspections confirm the building complies and can be legally occupied.

Which building system is most commonly associated with Legionella growth risk that requires a water management program?

Answer: Cooling towers

Cooling towers create warm, aerosolized water conditions ideal for Legionella growth and spread, as noted in ASHRAE 188.

Asbestos-containing material is classified as 'friable' when it:

Answer: Can be crumbled or reduced to powder by hand pressure

Friable material releases fibers easily because hand pressure can crumble it, which makes it a higher exposure risk.

A maintenance department bills tenant departments for the work orders it performs for them. What is this practice called?

Answer: Chargeback

A chargeback allocates service costs to the internal departments or tenants that use them.

What does the term 'PM optimization' typically involve?

Answer: Reviewing PM tasks to remove non-value tasks, adjust frequencies, and add condition-based tasks

PM optimization refines the existing program so each task addresses a real failure mode at the right interval.

BAS trend logs show an AHU's heating and cooling valves both partially open at the same time. What does this most likely indicate?

Answer: A control sequence fault or leaking valve causing simultaneous heating and cooling

Unintended simultaneous heating and cooling wastes energy and usually means a control logic problem or valve leak-through.

Which piece of information is most important to include on a well-written PM work order task list?

Answer: Specific measurable steps and acceptable limits, such as torque values or temperature ranges

Clear, measurable criteria ensure consistent execution and let technicians recognize out-of-tolerance conditions.

MERV ratings used to select air filters are defined by which test standard?

Answer: ASHRAE Standard 52.2

ASHRAE 52.2 defines the Minimum Efficiency Reporting Value test method for air cleaning devices.

A pump gauge shows 10 psi of pressure. Approximately how many feet of water head does this represent?

Answer: 23.1 feet

One psi equals about 2.31 feet of water head, so 10 psi ≈ 23.1 feet.

Which formula correctly calculates real power for a balanced three-phase load?

Answer: P = V × I × 1.732 × PF

Three-phase real power uses line voltage times line current times the square root of 3 (1.732) times power factor.

Which control is the final safety device on a steam boiler designed to prevent catastrophic overpressure?

Answer: ASME safety relief valve

The ASME-rated safety valve mechanically relieves pressure if all operating and limit controls fail.

The IBC requires panic hardware on egress doors with locks or latches in Group A and E occupancies when the occupant load reaches at least:

Answer: 50

IBC 1010.2.9 requires panic or fire exit hardware in Group A and E occupancies with an occupant load of 50 or more.

Why is establishing a baseline reading important when starting a predictive maintenance program?

Answer: It provides a reference to detect changes and trends in equipment condition

Trending against a known-good baseline reveals deterioration that a single reading could not show.

Which OSHA standard requires employers to have an Emergency Action Plan, which may be communicated orally if there are 10 or fewer employees?

Answer: 29 CFR 1910.38

1910.38 covers emergency action plans and permits oral communication for employers with 10 or fewer employees.

Under NFPA 25, how often must the main drain test be done on a wet pipe sprinkler system riser?

Answer: Annually

NFPA 25 requires an annual main drain test to confirm the water supply and spot changes or blockages compared with earlier results.

Under OSHA 29 CFR 1910.147, who is authorized to remove a lockout device from energy-isolating equipment under normal circumstances?

Answer: The authorized employee who applied it

OSHA requires each lockout device to be removed by the authorized employee who applied it, except under specific documented emergency removal procedures.