GA Elevator Mechanic flashcards
GA 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.
- ASME A17.1
- The model safety code for elevators, escalators, dumbwaiters, moving walks, and material lifts. It sets design, construction, installation, and acceptance-test requirements and is the code Georgia adopts by rule.
- ASME A17.2
- The inspection guide and code covering inspection, testing, and maintenance of elevators and escalators. It defines test categories and procedures used by inspectors and mechanics during periodic and acceptance inspections.
- ASME A17.3
- The code for existing elevators and escalators. It specifies retroactive safety requirements applied when older equipment is upgraded or when the authority having jurisdiction requires compliance for existing installations.
- Category 1 test
- A periodic safety test performed with the car empty at rated speed. It verifies governor and safety operation, terminal stopping, and other safety functions without the rated-load conditions used in Category 5 testing.
- Category 5 test
- A test performed under rated load that includes tripping the car safety gear and, where applicable, buffer testing. It confirms the safety system can stop and hold a loaded car as the code requires.
- Governor tripping speed
- The speed at which the overspeed governor releases the safety gear. It is set relative to the elevator's rated speed within the range specified by A17.1 and verified during acceptance testing.
- Escalator comb plate switch
- A safety switch on the comb plate at each landing. If an object or step forces the comb plate to move, the switch opens the control circuit and stops the escalator to prevent injury.
- Operating certificate
- A document issued by the authority having jurisdiction after a successful inspection, permitting the elevator or escalator to be operated. It must be kept current and posted as the rules require.
- Guide rail plumb tolerance
- The allowable deviation of guide rails from vertical, commonly about 0.5 mm per 5 m (1/16 in. per 15 ft) per rail, plus limits on rail twist. Exact values come from the adopted code edition.
- Pit ladder and lighting
- Code-required pit access provisions: a ladder or stairway, a pit light, a GFCI receptacle, and a stop switch reachable at the pit entrance. These support safe maintenance and inspection work.
- Hydraulic relief valve
- A pressure-limiting valve on a hydraulic elevator power unit. It bypasses oil at a set pressure below the system design limit, protecting the jack, piping, and fittings from overpressure.
- Rupture valve
- A hydraulic elevator valve that senses excessive oil flow from a broken pipe or fitting and closes to limit the flow. This controls the car's descent and prevents uncontrolled lowering.
- Rope retirement criteria
- Rules for removing traction ropes from service. They consider broken wires per lay length, diameter loss from wear, corrosion, and distortion; exceeding any criterion requires rope replacement.
- Escalator step sag device
- A safety device that detects a step dropping below its normal level, often at the landing. It opens the control circuit and stops the escalator before the step can cause a hazard.
- Rail bracket spacing
- The maximum distance between guide rail brackets, set by rail size, load, and code. Standard rails commonly use about 4.9 m (16 ft) maximum spacing, with closer spacing where required.
- Leveling accuracy
- How closely the car floor aligns with the landing sill when stopped. It is checked at each landing during maintenance and acceptance testing to ensure safe passenger transfer and door operation.
- Car safety gear
- A mechanical device that clamps the guide rails to stop and hold the car if it overspeeds or a suspension failure occurs. It is tripped by the governor or by a slack-rope device.
- Door interlock
- An electrical and mechanical device that prevents car movement unless every hoistway door and the car door are closed and locked. It opens the control circuit if a door unlocks.
- Final limit switch
- A backup stopping device at the terminal landing. If normal stopping fails, the final limit opens the power circuit to prevent the car from traveling beyond the safe hoistway limits.
- Main line disconnect
- A lockable switch in the machine room that removes power from the driving machine and controller. It must be opened and locked out before maintenance or repair work begins.
- Escalator safety chain
- A series electrical circuit linking all escalator safety switches. Any opened switch, such as comb, skirt, handrail, or step devices, breaks the chain and stops the escalator.
- Phase reversal protection
- A control feature that prevents a three-phase motor from running in the wrong direction after a wiring change or power interruption, and that detects a lost phase.
- Motor overload relay
- A protective device that opens the motor circuit when current exceeds a set level for too long. It protects the driving machine motor from overheating and damage.
- Brake holding capacity
- The ability of the machine brake to hold the car and its rated load, commonly verified at 125% of rated load per code. Lining wear and spring setting affect this capacity.
- Emergency stop switch
- A manually operated switch that removes power from the driving machine. Where the code requires one, it must be accessible to authorized personnel and function reliably when tested.
- Georgia Elevator Division
- The unit of the Georgia Safety Fire Commissioner's Office that licenses elevator contractors and mechanics, reviews plans, conducts inspections, and issues operating certificates under Chapter 120-3-13.
- Georgia mechanic license
- A credential issued by the Safety Fire Commissioner to a person who meets age, experience, and examination requirements. Work on elevators must be done by or under a licensed mechanic.
- Installation permit
- An approval required from the Elevator Division before installing or altering an elevator or escalator. It follows plan review and precedes acceptance inspection and certificate issuance.
- Acceptance inspection
- The inspection and testing performed on a new or altered installation before it is placed in service. Passing it leads to issuance of the operating certificate by the authority.
- License suspension
- An enforcement action by the Safety Fire Commissioner that temporarily removes a license or certificate for rule violations. It may accompany an order taking equipment out of service.
- Accident reporting
- The requirement to notify the Elevator Division of serious injuries, fatalities, or major equipment failures. Equipment may remain out of service pending investigation of the incident.
- Direct supervision
- A licensing requirement that unlicensed helpers and apprentices work only under the oversight of a licensed elevator mechanic who is responsible for the work performed.