IL Elevator Mechanic flashcards
IL Elevator Mechanic · Build recall with a focused review session.
32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Illinois Elevator Safety Act
- The Illinois statute (225 ILCS 320) that establishes licensing, permitting, and inspection authority for elevators and escalators in the state.
- ASME A17.1 scope
- The Safety Code for Elevators and Escalators covering electric and hydraulic elevators, escalators, moving walks, and material lifts, with separate Parts for each equipment type.
- Escalator maximum rise
- A single escalator unit is limited to a maximum rise of 60 ft unless a code variance is granted by the authority having jurisdiction.
- Escalator step width
- Escalator steps are furnished in nominal widths of 24 in (600 mm) or 40 in (1000 mm), and the step edges must be marked with a contrasting color.
- Combplate clearance limit
- The combplate teeth must mesh with the step cleats with a total clearance not exceeding 3/16 in (4.8 mm) in the direction of travel.
- Certificate of operation
- A document issued after a satisfactory inspection that must be posted in the car and shows the inspection date and expiration date.
- Traction drive principle
- A sheave driven by a geared or gearless machine pulls ropes over the sheave to raise the car, with a counterweight balancing part of the load.
- Counterweight balance
- The counterweight typically balances the car weight plus about 40-50% of the rated load, reducing the machine's required lifting effort.
- Hydraulic relief valve setting
- The relief valve must be set to open at no more than 2.5 times the pressure required to lift the rated load, protecting the system from overpressure.
- Telescopic jack
- A hydraulic jack with multiple concentric plungers that extend in stages, allowing a long car rise with a shorter overall jack length.
- 2:1 roping
- A reeving arrangement in which the rope travels twice the car distance and the rope tension is half the load, so rope speed is twice car speed.
- Governor tripping speed
- The speed at which the governor trips and applies the car safety, typically set at 115-125% of the car's rated speed.
- Safety chain
- A series circuit of normally closed switches, including pit, car top, door locks, governor, and final limits, that stops the car when any switch opens.
- Door interlock function
- A positively operated device that prevents the car from starting unless the landing door is closed and locked, and is part of the safety chain.
- Variable-frequency drive
- An electronic motor controller that varies the frequency and voltage supplied to an AC induction motor for smooth acceleration and accurate leveling.
- Main line disconnect
- A lockable switch that opens all ungrounded conductors and is located where it is accessible to the mechanic, not in the hoistway or pit.
- Equipment grounding conductor
- A conductor, identified green or green with yellow stripe, that bonds the machine, controller, and car frame to ground for fault protection.
- Car safety
- A governor-operated device that applies wedges or rollers to the guide rails to stop and hold the car when it overspeeds in the down direction.
- Governor tension sheave
- A weighted sheave that keeps the governor rope under tension so the governor can trip the safety if the rope goes slack or breaks.
- Final limit switch
- A separate, non-resettable switch that stops the car if it overtravels past the normal terminal landing and must be reset by a mechanic.
- Door reopening device
- A mechanical safety edge or infrared curtain that reverses the door on contact or obstruction, with reopening force limited by code.
- Annual safety test
- A documented test by a licensed mechanic covering the car safety, governor, buffers, door interlocks, and counterweight safety.
- Pit ladder requirement
- A securely fastened ladder providing pit access without moving the car, with rungs spaced not more than 12 in apart and extending near the pit floor.
- Fire service Phase I
- A key switch that recalls the car to the designated landing and opens the doors when a fire alarm is received.
- Fire service Phase II
- A mode that allows firefighters to control the car with the doors open under restricted conditions using the in-car key switch.
- Insulation resistance test
- A megger test performed with the circuit de-energized and isolated; a reading below the manufacturer's minimum indicates degraded insulation.
- Oil buffer
- A buffer required for car speeds above 200 ft/min that uses oil to absorb impact energy and must be kept filled to the marked level.
- Brake holding capacity
- The traction machine brake must set automatically when power is removed and hold 125% of rated load without slipping.
- Rupture valve
- A hydraulic valve that closes to stop oil flow and prevent a runaway car if a pipe or fitting ruptures.
- Escalator emergency stop
- A clearly marked button at each landing that stops the escalator within the code's stopping distance when pressed.
- Skirt guard clearance
- The gap between the escalator step and the skirt panel, checked with a gauge to prevent entrapment of shoes or clothing.
- Machine room requirements
- The machine room must be locked, ventilated, kept within the equipment's temperature rating, and not used for storage of unrelated materials.