SST (Pakistan Educators Recruitment Tests) case studies
SST · Put your knowledge to work in context.
The SST certification is a technician-level credential for people who install, operate, maintain, and troubleshoot the equipment and systems it covers. It is aimed at practitioners who already touch the hardware or process in the field - installers, maintenance technicians, operators moving into a technical role, and supervisors who need to verify that work meets code and safety expectations. The SST case studies are 5 cases and about 3,131 words.
1Standby Battery Sizing at Retail Handover
A 1,000 m² single-storey retail unit is being handed over with a 12-device addressable fire panel. The technician measured 310 mA standby current at 24 V with all devices connected and the AC supply simulated as failed, and 3.10 A with every notification appliance sounding.
599 words, about 3 min2Mag Lock Request on the Only Egress Door
A 12-unit residential building has one stairwell door serving as the only egress from the common corridor to the street. The owner's contractor asks you to fit a 600 lb electromagnetic lock released only by a card reader on the secure side, with no request-to-exit device and no link to the building fire alarm, because "the panel is old and the budget is gone." The nearest manual pull station is 18 m away in the lobby.
626 words, about 3 min3Intermittent Supervisory Trouble After Heavy Rain
During an annual preventive maintenance visit, you find a repeating supervisory trouble on a detection loop that runs 250 m underground in conduit to a gatehouse. The trouble appears only after heavy rain, clears on reset, and has been logged 11 times in three months.
605 words, about 3 min4Notification Sound Level Fails the Acceptance Check
A machine workshop, 30 m × 18 m with a 6 m ceiling, has been fitted with eight horn/strobes on a 70 V line. During acceptance testing you measure 89 dBA in the far corner while the machines are running; a background reading of 62 dBA was used at design stage.
615 words, about 3 min5Handover With Substituted Devices and Missing Records
A 96-device system is complete and working. During the job, three devices were substituted for a different model because of a supply delay; the as-built drawings still show the original part numbers.
686 words, about 3 min