TSSA EDM-B Exam flashcards

33 cards. Read the term and the definition here. The deck at the top of this page is optional.

EDM-B licence scope

A restricted elevating devices mechanic class tied to a specific building/owner; it authorizes only the maintenance and repair duties defined for that class, not installation or alteration outside the class.

O. Reg. 209/01

Ontario regulation under the Technical Standards and Safety Act, 2000 that governs elevating devices, licensing of mechanics and contractors, inspections, and adoption of the technical code.

Adopted technical code

ASME A17.1/CSA B44 Safety Code for Elevators and Escalators, as amended by TSSA; it sets design, installation, maintenance, and test requirements for elevating devices in Ontario.

Category 1 test

The routine periodic inspection/test category in A17.1/CSA B44, performed at the shortest interval (typically annual for most devices), covering operating, door, and safety-device checks.

Category 5 test

The five-year periodic test category requiring full-load and safety-device testing (e.g., safeties, buffers, governor) at the longer interval defined in the code tables.

Governor trip speed

The speed at which the overspeed governor mechanically trips the safety; it is set as a percentage above rated speed per the code table, with a separate electrical overspeed switch setting.

Car safety

A mechanical device mounted on the car that grips the guide rails when tripped by the governor on overspeed, stopping and holding the car; it is distinct from buffers and limit switches.

Oil buffer

A hydraulic energy-absorbing device in the pit that decelerates the car or counterweight over a controlled stroke; pit depth must accommodate its stroke plus runby and refuge space.

Counterweight runby

The vertical distance the counterweight can travel past its normal level before striking the buffer; it must meet the code minimum for the buffer type and rope stretch allowance.

Overhead clearance

The vertical distance from the top of the car (or counterweight) at its highest position to the hoistway overhead structure; it must accommodate runby, buffer stroke, and code minimums.

Hoistway door interlock

A device that prevents car movement unless the hoistway door is closed and locked, and prevents unlocking the door while the car is away from the landing, per code.

Final limit switch

A switch that cuts power to the driving machine if the car travels beyond the normal terminal stopping point, providing a backup to the normal limit switches.

Slack-rope switch

A device that detects loss of tension in the suspension ropes (e.g., car hung up) and removes power to prevent rope damage or uncontrolled movement.

Rope safety factor

The ratio of rope breaking strength to the load it carries; A17.1/CSA B44 sets minimum safety factors by elevator type, commonly 12 for traction passenger suspension.

Rope retirement criteria

Code-based limits for removing suspension rope from service, including broken wires per lay, diameter reduction, corrosion, and distortion; the rope retirement table governs, not judgment alone.

Main line disconnect

The means to disconnect power to the elevator driving machine and control; it must be lockable in the open position and located as the code specifies relative to the machine room.

Log book

The on-site record of maintenance, repairs, tests, and inspections required for each elevating device; it must be kept available for TSSA inspection and updated by the mechanic.

Incident reporting

The duty to report serious incidents (injury, uncontrolled movement, significant entrapment) to TSSA; the device may be taken out of service pending investigation and correction.

Order to comply

A TSSA enforcement action requiring the owner/contractor to correct a code deficiency within a stated time; failure can lead to further orders or shutdown of the device.

Out-of-service device

A device that is unsafe or non-compliant must be shut down and not returned to service until corrected and re-inspected; the mechanic must escalate rather than operate it.

Machine-room access

Requirements for the machine room/space: locked access, lighting, receptacle, and clear working space; unauthorized access must be prevented and the room kept clear of storage.

Door protective device

A device on the car door (light curtain, safety edge) that detects an obstruction and reverses or stops the door to prevent injury, with code-defined force and time limits.

Emergency unlocking

A keyed means to unlock a hoistway door from the landing for emergency access; it must not permit unlocking when the car is away from that landing.

Rated load test

A test performed with the car loaded to its rated capacity to verify the machine, brake, and safety devices perform within code limits; part of the periodic test categories.

Brake test

A check that the driving-machine brake holds the car at rated load and stops it within code limits; brake condition and adjustment are routine maintenance items.

Pit refuge space

The minimum clear space in the pit that must remain available for a person when the car is at its lowest position, measured per the code with buffer stroke and runby considered.

Top-of-car clearance

The clear vertical space above the car top at its highest position that must meet code minimums for a person to remain clear of the overhead structure.

Escalator step demarcation

The code requirement for contrasting demarcation on escalator step edges and landing plates to make step boundaries visible and reduce trip/fall hazards.

Escalator skirt guard

A device along the escalator skirt that contacts a trapped object and stops the escalator to prevent injury between step and skirt panel.

Combplate safety switch

A switch at the escalator landing that stops the unit if the combplate is displaced, preventing injury from objects caught at the comb.

Handrail speed monitoring

A device that detects a mismatch between handrail and step speed and stops the escalator, since handrail/step synchronization is a code safety requirement.

Licensed contractor

A business licensed by TSSA to perform elevating device work; the owner must hold a maintenance contract with one and the mechanic works under its authority.

Unsafe condition

A condition that could cause injury or uncontrolled movement; the mechanic must stop work, secure the device, and report it rather than continue operation.