NICET ITWBS flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

NFPA 25

Standard for inspection, testing, and maintenance of water-based fire protection systems; it applies to existing systems and does not replace design requirements of NFPA 13 or 14.

NFPA 13

Standard for design and installation of sprinkler systems; used as a baseline for acceptance and for evaluating whether existing sprinkler arrangements meet design criteria.

NFPA 14

Standard for installation of standpipe and hose systems; covers classes, pipe sizing, outlets, pressure, and acceptance testing before NFPA 25 maintenance begins.

NFPA 20

Standard for stationary fire pumps; covers pump selection, installation, controllers, and acceptance testing; NFPA 25 then governs routine inspection and testing.

Lockout tagout

Procedure that isolates hazardous energy, locks controls, and verifies zero energy before servicing fire pumps, controllers, or electrical alarm circuits to prevent unexpected startup or shock.

Impairment fire watch

When fire protection is disabled, notify occupants and the authority having jurisdiction as required and provide a trained fire watch with extinguishing capability until systems are restored.

Confined space entry

Entry into pits, vaults, or tanks requires atmospheric testing, ventilation, an attendant, retrieval equipment, and authorization; oxygen deficiency or flammable gas can be fatal.

Stored energy hazard

Capacitors, springs, compressed air, and pressurized water can remain energized after isolation; release or block stored energy and verify before work begins.

Hot work permit

Written authorization for cutting, welding, or grinding near sprinkler equipment; requires area protection, fire watch, and checking for concealed combustibles before and after work.

Rated fire pump point

At 100 percent rated flow, a centrifugal fire pump must produce at least 100 percent of rated pressure; this point anchors the pump performance curve.

150 percent pump flow

At 150 percent of rated flow, a centrifugal fire pump must produce at least 65 percent of rated pressure; this confirms the curve has adequate overload capacity.

Churn pressure limit

Shutoff or churn pressure of a centrifugal fire pump generally must not exceed 140 percent of rated pressure; higher pressure can overstress system components.

Net pump pressure

Discharge pressure minus suction pressure, with gauge corrections; used to plot fire pump test results and compare performance with the rated curve.

Hydrant flow residual

During a hydrant flow test, residual pressure should not fall below about 20 psi; lower residual indicates supply limitation and possible cavitation or inadequate fire flow.

Main drain test

Full-flow test through the main drain; record static and residual pressures and compare with previous results to detect supply changes, closed valves, or obstructions.

Inspector test connection

Valve at the end of a sprinkler branch that simulates one sprinkler flow; opening it verifies waterflow alarm, pressure switch, and retard chamber operation.

Spare sprinkler inventory

Replacement sprinklers of correct type, temperature rating, and K-factor kept on site; inventory is checked during inspections and replenished after use.

Dry pipe trip test

Test that admits air or water to a dry pipe valve to verify the clapper trips, water reaches the system, alarms operate, and valve resets properly.

Gauge inspection monthly

System gauges are read monthly to compare normal supply and system pressures; unexplained changes can indicate leaks, closed valves, or water supply problems.

Class I standpipe

Standpipe system with 2.5-inch hose connections intended for fire department use; minimum residual pressure at the topmost outlet is generally 100 psi.

Class II standpipe

Standpipe system with 1.5-inch hose stations intended for occupant use; minimum residual pressure at the topmost outlet is generally 65 psi.

Standpipe hydrostatic

Pressure test of standpipe piping at 200 psi for two hours or 50 psi above maximum system pressure, whichever is greater, with no leakage.

Fire department connection

Connection where a pumper supplies a standpipe or sprinkler system; inspect caps, threads, gaskets, clappers, signage, and unobstructed access.

OS&Y valve position

Outside screw and yoke valve is open when the stem extends from the yoke and closed when the stem is retracted, with visual indication at the valve.

Alarm check valve

Check valve with trim that detects sprinkler water flow; the inspector test verifies retarding chamber, pressure switch, and alarm signaling operate correctly.

Dry pipe valve

Valve held closed by air pressure on the system side and water pressure on the supply side; it trips when air leaks reduce pressure, allowing water into piping.

Valve tamper switch

Supervisory device that signals an off-normal control valve position to the fire alarm panel; testing verifies the signal and restoration.

Pressure regulating valve

Device that reduces downstream pressure; verify inlet and outlet pressures, flow capacity, strainer condition, and that outlet pressure meets design.

ITM record content

Record includes date, system and component identification, tester, inspection or test results, deficiencies found, and corrective actions taken or recommended.

Impairment record

Document affected system, reason, start and end time, authority and occupant notifications, fire watch, and restoration; supports accountability during unprotected periods.

Acceptance baseline

Initial acceptance test data for pump curves, main drains, and alarm response provide the reference for detecting deterioration during later inspections.

Critical deficiency

Deficiency that compromises system performance and requires immediate correction or impairment procedures, such as a closed control valve or failed fire pump.