NEIEP Mechanic Exam case studies
NEIEP Mechanic Exam · Put your knowledge to work in context.
The NEIEP Mechanic Exam is the assessment that apprentices in the International Union of Elevator Constructors (IUEC) training pipeline take to advance from apprentice to mechanic status. It is administered through the National Elevator Industry Educational Program, the educational arm that delivers classroom and online instruction to elevator constructors. The NEIEP Mechanic Exam case studies are 5 cases and about 3,917 words.
1Setting a Replacement Escalator on Existing Supports
A 1990s 30-degree escalator in an active transit station is being replaced in kind. The new unit matches the old rise of 5,800 mm and the nominal 30-degree incline, but the manufacturer's support reactions land about 175 mm inboard of the old unit's, and the new truss uses a different anchorage pattern.
815 words, about 4 min2Intermittent Door Faults That Only Happen at Floors 5 to 8
A 12-stop geared traction elevator (1998) with a solid-state controller installed in 2014 logs intermittent faults two to four times a week. The log always shows the same thing - 'door open during travel' or 'gate switch open' - and the car stops at the next landing with the doors closed.
758 words, about 4 min3A Hydraulic Car That Will Not Hold at the Top Landing
A 4-stop, 1985 hydraulic elevator (2,500 lb capacity, in-ground single-stage jack, submersible power unit in the tank) is drifting. Parked at the top landing with the doors closed, the car settles about 45 mm in 10 minutes, re-levels, and repeats; the building says the car is never at the floor in the morning.
787 words, about 4 min4DC Bus Overvoltage Trips on Regenerating Runs
A 2005 geared traction elevator (3,500 lb, 350 fpm, 480 V three-phase) uses a closed-loop VVVF drive with a DC bus, an IGBT chopper and a dynamic braking resistor. It now trips on 'DC bus overvoltage' during deceleration, but only when the car is descending with more than about 2,000 lb aboard, or ascending empty.
765 words, about 4 min5Pre-Job Walk on an Occupied-Building Modernization
You are starting a five-week modernization of the only elevator in an occupied six-stop office building - new controller, machine, car, door operator and fixtures. During the pre-job walk you find: pit depth 1.5 m; the only access is a loose 1.2 m wooden step ladder lying in the pit; there is 20 mm of standing water at the sump end; the pit light is a bare lampholder fed from a circuit that also serves the machine room; there is no GFCI receptacle in the pit; the car top has no railing; the car-top stop switch works, but the inspection station is a pendant on a 1.5 m cord stored loose on the car top; the mainline disconnect is a lockable three-pole switch in the machine room, but the machine room door has no lock and the room is being used for storage; there is an unlabeled existing conduit run crossing the hoistway with no record of what it feeds.
792 words, about 4 min