100+ Free NICET Special Hazards II Practice Questions

Installation

Terminating and testing wiring (insulation resistance, ground fault, loop resistance), NEC 760 cable types (FPL/FPLR/FPLP), piping preparation and restraints per the FSSA handbook, addressing and programming field devices, flame detector aiming, aspirating transport time (120 s max), pipe-puff and 40 psig/10-minute pneumatic tests, abort and manual release mounting, cross-zone wiring, and final acceptance with the AHJ

Inspection, Testing, and Maintenance

Semiannual container checks (halocarbon: 5% agent or 10% pressure loss; inert: 5% pressure; CO2: 10% weight), smoke detector sensitivity schedule (1 year, alternate years, extendable to 5), public-mode audibility (15 dB above ambient), firmware reacceptance testing (10% sample, max 50 devices), annual foam concentrate lab samples, annual enclosure inspection, 5-year hose tests, and semiannual battery load tests

System Design and Configuration

Class A design concentration (1.2 x extinguishing concentration), discharge times (95% of design in 10 s halocarbon / 60 s inert), 85% hold at 10 minutes, CO2 34% minimum, smooth-ceiling smoke spacing (30 ft) and high-air-movement reductions, NEC 760 circuit separation, site survey data for agent quantity, altitude correction, tee split limits, and inert gas pressure relief venting

Repair and Recharge

Half-split troubleshooting of opens and ground faults, DOT 49 CFR hydrostatic retest before recharge (5-year clock), 5-year external visual in lieu of hydro for containers in continuous service, gravimetric recharge at listed fill density with nitrogen superpressurization, foam concentrate compatibility, bladder leak indicators, compatibility-listed detector replacement, and NFPA 17/17A 6-year and 12-year cycles

Safety

CO2 lethality at extinguishing concentrations (34%+), NFPA 12 abort switch prohibition, lockout valves with supervised position, predischarge alarms and evacuation time delays, ventilation and atmosphere verification before post-discharge entry, halocarbon NOAEL limits for occupied spaces, inert agent oxygen exposure limits, and discharge test precautions (noise, dry ice, static)

Work Management

Preparing RFIs for field conflicts, compiling submittal packages (shop drawings, product data, flow and battery calculations, sequence matrix), obtaining AHJ permits per the adopted fire code, coordinating with other trades through overlay drawings, pre-task preparation, and close-out documentation (as-builts, O&M manuals, acceptance records, owner training)