CT Elevator Mechanic flashcards
CT Elevator Mechanic · Build recall with a focused review session.
23 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Traction arrangement
- A designed elevator drive relationship using the suspension and sheave interface, whose actual geometry and ratings govern force transfer.
- Suspension ratio
- A defined relationship between rope and car motion, requiring its convention and actual geometry rather than a guessed numerical label.
- Counterweight balance
- The actual offsetting mass relationship in a traction system, which affects energy and force without one universal payload percentage.
- Governor function
- A specified overspeed-related sensing or actuation function, distinct from normal drive control, leveling and every other protective device.
- Hydraulic control valve
- A component regulating relevant fluid paths under the actual elevator design, not automatically complete pressure or rupture protection.
- Terminal protection
- The actual function addressing travel toward an end limit, distinct from a complete safeguard against every motion hazard.
- Leveling
- The actual positioning of car floor relative to the landing under the designed control and mechanical arrangement, not proof of all code compliance.
- Dispatch
- The control decision assigning or sequencing service calls under the actual operating model rather than the physical lifting mechanism.
- Regenerative drive
- A designed system returning appropriate braking energy to a usable electrical path when the actual energy-flow conditions permit.
- Stored energy
- Energy remaining in electrical, mechanical, hydraulic or other forms after an apparent stop, requiring the actual competent control method.
- Fault history
- A record of actual states, conditions and events useful for diagnosis, distinct from a conclusion that one specific component must be defective.
- Authorized restoration
- The actual competent confirmation and release process after work or impairment, not merely resetting a display or completing a signature.
- Effective cylinder area
- The relevant pressure-loaded area for the stated direction, with the rod area subtracted on the annular side of a double-acting cylinder.
- Meter-out control
- Flow restriction on an actuator’s exhaust path in a specified circuit, which is not by itself a universal safe holding device for an overrunning load.
- Pressure versus flow
- Pressure describes force intensity while flow describes volume rate; confusing them can give an incorrect explanation for actuator force or speed.
- Cavitation
- Formation and collapse of vapor cavities when local liquid pressure becomes unsuitable, distinct from simply drawing free air into a system.
- Load-control arrangement
- An engineered combination managing the specified load and failure conditions, which cannot be replaced by assuming any simple throttle safely holds a suspended mass.
- Observed symptom
- A documented change in performance or condition that can motivate investigation but does not alone establish the unique failed component or root cause.
- Condition-based task
- A maintenance action triggered by relevant observed equipment condition under appropriate assessment criteria, rather than simply by elapsed calendar time.
- Root-cause hypothesis
- A proposed explanation for the failure mechanism that must be tested against suitable evidence, not established merely by replacing a named part.
- Controlled restoration
- An authorized return-to-service process including the relevant protective functions, functional checks, records and handover under actual equipment and site requirements.
- Mean repair duration
- A defined average of relevant active repair time divided by the counted repairs, which must not be confused with every elapsed outage or logistical delay.
- Maintenance history
- A controlled record of asset conditions, faults, actions and evidence supporting comparisons and investigation rather than merely storing the latest replacement invoice.