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TSSA EDM-B Exam study materials
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TSSA EDM-B Exam practice questions

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Question 1Elevating Devices

Under the TSSA Elevating Devices regulation, which document must an owner obtain before an elevating device may be placed into service after a major alteration?

  1. A building occupancy permit only
  2. A contractor's insurance certificate only
  3. A passing inspection and a licence or registration for the device Correct answer.
  4. A manufacturer's warranty certificate only

Explanation

After a major alteration, the device must be inspected and found compliant, and the device must hold a current licence or registration with the authority before it is placed back into service. A warranty, occupancy permit, or insurance certificate alone does not authorize operation of an elevating device.

Question 2Elevating Devices

Which person is legally permitted to perform maintenance on an elevating device in Ontario?

  1. A building superintendent trained by the previous contractor
  2. The building owner, if they own the tool set
  3. A licensed elevating device mechanic or an appropriately qualified person working under an approved contractor Correct answer.
  4. Any journeyperson electrician

Explanation

Maintenance of elevating devices must be performed by licensed mechanics or qualified persons working under a registered contractor licensed for that work. Building staff and general trade electricians are not authorized simply by familiarity or by owning tools. The licence attaches to the individual and to the contracting firm.

Question 3Elevating Devices

An elevating device is involved in a serious incident in which a passenger is injured. What is the owner's immediate obligation?

  1. Report the incident to the authority and preserve the scene Correct answer.
  2. Report it only if the passenger files a claim
  3. Wait for the next scheduled inspection to mention it
  4. Repair the device and resume service before reporting

Explanation

Serious incidents must be reported promptly to the authority, and the device should be taken out of service and left undisturbed as far as necessary for investigation. Repairing and resuming operation first can destroy evidence and violates reporting duties. Reporting is not contingent on a claim being filed.

Question 4Elevating Devices

Which component is required to stop the elevator car if it travels beyond the normal terminal landing in the up direction?

  1. The final terminal stopping device Correct answer.
  2. The governor rope tension device
  3. The door zone sensor
  4. The car preference switch

Explanation

Final terminal stopping devices act as a last line of defence to stop the car if normal terminal stopping fails and the car overtravels. The governor rope tension device monitors rope slack, not overtravel. Door zone sensors and preference switches serve unrelated control functions.

Question 5Elevating Devices

What is the primary purpose of the counterweight in a traction elevator system?

  1. To level the car at each floor
  2. To increase the rated load of the car
  3. To provide emergency braking
  4. To reduce the unbalanced load the machine must lift and improve traction efficiency Correct answer.

Explanation

The counterweight balances most of the car and load weight so the machine handles only the imbalance, reducing motor size and power demand. It does not raise the rated capacity and does not perform braking or leveling. Leveling is handled by the control system and brake.

Question 6Elevating Devices

A hydraulic elevator uses a plunger and cylinder. Which condition most directly indicates a potential cylinder or piping leak that should be investigated?

  1. The car levels slowly at the top floor
  2. The oil level in the tank drops over time with no visible external loss Correct answer.
  3. The car door closes faster than usual
  4. The pump runs longer on a heavy load

Explanation

A gradual drop in tank oil level without an external source suggests loss of hydraulic fluid, which may indicate a cylinder or piping leak, including underground leakage. Slow leveling, longer pump run time under load, and door speed are separate operational issues. Undetected hydraulic loss is a recognized safety concern for these units.

Question 7Elevating Devices

Which device is designed to prevent the car from moving with the doors open unless the car is within the unlocking zone?

  1. The car operating panel
  2. The door interlock and gate switch circuit Correct answer.
  3. The oil buffer
  4. The governor

Explanation

Door interlocks and gate switches are wired into the safety circuit so the car cannot run unless doors are closed and locked, except within the permitted unlocking zone for leveling. The car panel, governor, and buffers serve different functions. This interlock is a fundamental protection against running with an open hoistway door.

Question 8Elevating Devices

What is the function of the safety gear on an elevator car?

  1. To cushion the car at the pit
  2. To hold the doors closed at a landing
  3. To limit the load in the car
  4. To grip the guide rails and stop the car if it overspeeds in the down direction Correct answer.

Explanation

Safety gear is activated by the governor when the car exceeds a set overspeed and clamps the guide rails to stop the car. Buffers, not safeties, cushion the pit. Door holding and load limiting are separate functions. The safety gear is a primary overspeed protection device.

Question 9Elevating Devices

During a periodic inspection, a mechanic finds the car enclosure has a broken panel fastener leaving a sharp edge accessible to passengers. What is the appropriate immediate action?

  1. Reduce the rated load posted in the car
  2. Take the device out of service until the hazard is corrected Correct answer.
  3. Note it for the next annual inspection
  4. Post a warning sign and continue normal service

Explanation

An accessible sharp edge or insecure panel is a hazard to passengers and should be corrected before the device continues in service; if it cannot be corrected at once, the unit is removed from service. Deferring to the next inspection or posting a sign leaves the hazard present. Load reduction does not address the physical defect.

Question 10Elevating Devices

A traction elevator with a rated speed of 1.75 m/s is being tested. Which statement about governor trip speed is correct in principle?

  1. The governor trip speed is irrelevant once the brake is working
  2. The governor is set to trip above rated speed, and the safety gear is expected to stop the car within specified limits Correct answer.
  3. The governor should trip only when the car is empty
  4. The governor should trip at the rated speed exactly

Explanation

The governor is set to trip at a speed above rated speed so normal running does not activate it, and the safety gear must then stop the car within code limits. Tripping at exactly rated speed would cause nuisance stops. Brake function does not make overspeed protection unnecessary, and trip speed does not depend on car load.

Question 11Elevating Devices

An owner wants to change the rated load posted in an elevator car to a higher value without altering the equipment. What is the correct position?

  1. The rated load is a design value and cannot be increased without an engineering assessment and approval process Correct answer.
  2. The mechanic may increase it if the car feels strong
  3. The rated load only matters for freight elevators
  4. The owner may repost any value they choose

Explanation

Rated load reflects the design capacity of the car, ropes, machine, and safeties, and cannot simply be reposted at a higher figure. Increasing it requires engineering evaluation and the appropriate alteration or approval process. A mechanic's impression or the device type does not authorize a change.

Question 12Elevating Devices

Which practice is required when performing routine maintenance on an elevator in a hoistway?

  1. Leave the car on normal operation to speed the work
  2. Rely on the car door interlock alone to protect the hoistway
  3. Use the hoistway access switch and place the car on inspection operation with the proper stopping controls Correct answer.
  4. Ask a passenger to hold the door open

Explanation

Hoistway work requires the car to be on inspection operation with the appropriate access switches and stopping controls so the mechanic controls movement. Relying on door interlocks alone does not protect a person in the hoistway. Normal operation or a passenger holding a door is unsafe and not permitted.

Question 13Elevating Devices

A newly installed elevator must be inspected before it carries passengers. Which sequence best reflects the acceptance process?

  1. The contractor self-certifies and the device enters service immediately
  2. The owner inspects it and notifies the manufacturer
  3. The contractor completes the installation, the device is inspected and accepted, and a licence is issued before service Correct answer.
  4. The device operates for a trial period, then is inspected

Explanation

New installations require inspection and acceptance by the authority before the device is placed in service, and a licence must be in place. Contractor self-certification, owner inspection, or operating first and inspecting later does not meet the requirement. The acceptance step is a precondition to public use.

Question 14Elevating Devices

Which condition would most likely require the elevator to be taken out of service pending repair?

  1. A worn floor mat at the landing
  2. A flickering ceiling light
  3. A defective door interlock that allows the car to run with a door unlocked Correct answer.
  4. A scuff mark on the car handrail

Explanation

A door interlock defect that permits running with an unlocked door defeats a primary passenger protection and requires removal from service until repaired. Cosmetic scuffs, flickering lights, and worn mats are maintenance items that do not defeat a safety function. The interlock is part of the safety circuit and its failure is serious.

Question 15Elevating Devices

A mechanic is testing the final limit switch on a traction elevator. What is the expected behavior?

  1. It should open the doors automatically
  2. It should reverse the car to the nearest landing
  3. It should stop the car before the counterweight or car strikes the buffer Correct answer.
  4. It should sound an alarm only

Explanation

The final limit switch removes power and stops the car before it reaches the buffers, providing a last protective stop beyond normal terminal stopping. It does not merely alarm, auto-reverse, or open doors. Its purpose is to prevent buffer impact from overtravel.

Question 16Elevating Devices

An elevator serves a building where the machine room temperature regularly exceeds the manufacturer's limit. What is the most appropriate response?

  1. Ignore it because temperature does not affect elevators
  2. Increase the rated speed to compensate
  3. Disable the machine room thermostat
  4. Provide adequate ventilation or cooling to keep the machine room within the specified range Correct answer.

Explanation

Machine room temperature must be maintained within the manufacturer's specified range to protect controls and machine components from overheating and nuisance faults. Ventilation or cooling is the correct remedy. Changing rated speed does not address heat, and disabling a thermostat removes protection.

Question 17Elevating Devices

Which statement best describes the role of the buffer in an elevator pit?

  1. It measures the car load
  2. It stops the car during normal leveling
  3. It locks the doors at the lowest landing
  4. It absorbs and limits the deceleration of the car or counterweight if it reaches the pit Correct answer.

Explanation

Buffers are energy-absorbing devices that limit deceleration if the car or counterweight reaches the pit, protecting occupants and equipment. They do not participate in normal leveling, door locking, or load measurement. They act only in the overtravel event they are designed for.

Question 18Elevating Devices

A contractor is asked to modernize the controller on an existing elevator. Which consideration is most important before the work begins?

  1. Whether the old controller can be sold
  2. Whether the alteration is assessed for compliance and the required permits and inspections are arranged Correct answer.
  3. Whether the new controller matches the colour of the machine room
  4. Whether the building owner likes the new display

Explanation

An alteration such as a controller replacement must be assessed for compliance with applicable requirements, and the necessary permits and inspections must be arranged before work starts. Aesthetics and resale value are irrelevant to regulatory compliance. Alterations can affect safety circuits and require acceptance inspection.

Question 19Elevating Devices

Which test confirms that the elevator's brake can hold the car with rated load?

  1. A pit ladder inspection
  2. A door closing force test
  3. A brake holding or static test with rated load applied Correct answer.
  4. A governor free-fall test

Explanation

Brake holding capacity is verified by a static or holding test with rated load to confirm the brake prevents movement. Door force tests address door safety, governor tests address overspeed protection, and pit ladders are access equipment. Each test verifies a different safety function.

Question 20Elevating Devices

An elevator with a rated speed of 2.5 m/s experiences a car overspeed. The governor is designed to trip at a speed above rated. If the governor fails to trip, which outcome is most consistent with code intent?

  1. The final limit and buffer provide a backup, but the missing governor trip is a serious deficiency requiring correction Correct answer.
  2. The car continues until the buffer stops it with no other protection
  3. The counterweight will prevent overspeed
  4. The door interlock will stop the car

Explanation

The governor and safety gear are the primary overspeed protection; if the governor fails to trip, only the final limit and buffers remain as backup, and the deficiency must be corrected. Door interlocks and the counterweight do not limit overspeed. A failed governor trip is a serious safety finding.

Question 21Elevating Devices

A hydraulic elevator with a below-ground cylinder shows a gradual loss of oil with no visible spill in the machine room. What is the most appropriate action?

  1. Investigate for an underground cylinder or piping leak and address it before continued service Correct answer.
  2. Increase the pump pressure to compensate
  3. Top up the oil and continue service indefinitely
  4. Reduce the rated load and continue

Explanation

Oil loss without a visible machine room spill suggests leakage from an underground cylinder or buried piping, which is a recognized environmental and safety concern. The source must be investigated and corrected rather than masked by topping up. Adjusting pressure or load does not fix the leak.

Question 22Elevating Devices

During a safety gear test on a traction elevator, the car stops but the measured stopping distance slightly exceeds the code limit. What is the correct conclusion?

  1. The test should be repeated until a passing number appears
  2. The governor should be disabled
  3. The result is acceptable because the car stopped
  4. The safety gear performance does not meet the requirement and must be corrected and retested Correct answer.

Explanation

Safety gear must stop the car within the specified distance limits; a stop outside those limits indicates the system does not meet the requirement and must be corrected and retested. Accepting any stop, repeating until a pass appears, or disabling the governor is improper. Test results must reflect actual performance.

Question 23Elevating Devices

An owner proposes to use an elevator car to transport a load exceeding the posted rated load on a regular basis. Which response is most appropriate?

  1. Allow it if the car moves slowly
  2. Permit it only at night
  3. Allow it if the doors are propped open
  4. Explain that the rated load is a limit and exceeding it can overload the machine, ropes, and safeties Correct answer.

Explanation

The rated load is the maximum design load; exceeding it stresses the machine, ropes, and safety devices and can compromise stopping performance. Slower movement, propped doors, or time of day does not change the structural and safety limits. Overloading is not a permissible operating practice.

Question 24Elevating Devices

A building has two elevators in a group control system. One unit is removed from service for repair. What is the most appropriate operational consideration?

  1. The remaining unit should run at reduced speed
  2. Group control should be adjusted so the remaining unit continues to serve calls safely Correct answer.
  3. The group controller should be bypassed entirely
  4. The remaining unit should be taken out of service too

Explanation

When one unit in a group is out of service, the group control should be arranged so the remaining unit continues to answer calls safely rather than leaving the building without service. Removing the working unit or bypassing the controller is unnecessary. Reduced speed is not required simply because a group member is offline.

Question 25Elevating Devices

A mechanic observes that the car leveling accuracy has degraded and passengers trip at landings. Which combination best addresses the issue?

  1. Repaint the landing sills
  2. Reduce the rated speed
  3. Adjust the door operator and increase door speed
  4. Check leveling sensors, brake performance, and load-weighing calibration Correct answer.

Explanation

Poor leveling can result from faulty leveling sensors, brake slip, or incorrect load-weighing calibration, so these should be checked and corrected. Door adjustments, painting sills, or reducing rated speed do not address the cause. Accurate leveling is a passenger safety concern at landings.

Question 26Elevating Devices

Under the elevator maintenance standard, what is the primary purpose of the car door interlock (door contact) circuit?

  1. To limit the maximum speed of the car during descent
  2. To prevent the car from starting or continuing to run unless the car door is closed and locked Correct answer.
  3. To recharge the battery that powers the alarm bell
  4. To slow the car automatically as it approaches a landing

Explanation

The door interlock circuit is a safety circuit wired in series with the operating control. It keeps the car from starting, and stops it if already moving, whenever the car door is not closed and locked. This ensures passengers cannot be exposed to an open hoistway.

Question 27Elevating Devices

A mechanic is asked to explain how a counterweighted traction elevator reduces the load on the hoisting machine. Which statement is correct?

  1. The counterweight removes the need for a machine brake
  2. The counterweight eliminates the need for suspension ropes
  3. The counterweight is sized to balance the car plus about 40 to 50 percent of the rated load Correct answer.
  4. The counterweight balances the car plus the full rated load at all times

Explanation

The counterweight is normally sized so its weight equals the car weight plus roughly 40 to 50 percent of the rated load. This reduces the unbalanced load the machine must lift across the range of car loading. It does not remove the need for a brake or for suspension ropes.

Question 28Elevating Devices

What is the function of the oil buffer installed in an elevator pit?

  1. To stop a descending car or counterweight that overtravels the lowest landing, limiting impact deceleration Correct answer.
  2. To detect slack in the suspension ropes
  3. To hold the car level at the lowest landing under load
  4. To store hydraulic fluid for the plunger during normal operation

Explanation

A buffer is a stopping device that limits the deceleration of a car or counterweight overtraveling the lowest landing. Oil buffers use a piston and fluid to absorb energy progressively. They are not part of normal leveling or hydraulic supply.

Question 29Elevating Devices

Which device is required to bring a car to a stop and hold it if the car attains a predetermined overspeed in the down direction?

  1. The governor and safety gear acting together Correct answer.
  2. The machine room ventilation fan
  3. The final limit switch
  4. The door interlock circuit

Explanation

The speed governor detects overspeed and triggers the safety gear, which grips the guide rails and stops the car. The governor and safety gear form the overspeed protection system. Other devices do not perform this function.

Question 30Elevating Devices

During a periodic inspection, a mechanic finds that the car operating panel emergency communication device does not reach a person who can respond. What is the correct action?

  1. Disable the alarm bell so passengers are not misled
  2. Leave the elevator in service and note the deficiency for the next annual inspection
  3. Post a sign telling passengers to use their mobile phones
  4. Record the deficiency and take the elevator out of service until communication is restored Correct answer.

Explanation

Emergency communication is a life-safety feature for trapped passengers. If it does not function, the elevator should be removed from service until repaired. Deferring the repair or disabling alarms compromises passenger safety.

Question 31Elevating Devices

A mechanic is preparing to enter a pit to inspect buffers. Which precaution is required before entering?

  1. Remove the car door from its track
  2. Ask a passenger to hold the door open
  3. Place the car on pit stop and verify the pit stop switch has taken control Correct answer.
  4. Turn off the machine room lights

Explanation

Before entering the pit, the mechanic must place the car on pit stop so the car cannot be moved from another location. The pit stop switch must be verified to be in control. This protects the mechanic from unexpected car movement.

Question 32Elevating Devices

Which statement correctly describes the role of the machine room disconnect switch?

  1. It provides a low-voltage signal to the car position indicator
  2. It resets the governor after a trip
  3. It controls the machine room lighting circuit
  4. It removes power from the elevator driving machine and its controller for maintenance Correct answer.

Explanation

The main line disconnect removes power from the driving machine and controller so work can be performed safely. It must be lockable and clearly identified. It does not serve signaling, governor reset, or lighting functions.

Question 33Elevating Devices

A hydraulic elevator car drifts downward slowly when parked at a landing with the pump stopped. Which component is the most likely cause?

  1. A leaking check valve or lowering valve in the power unit Correct answer.
  2. A worn guide shoe
  3. A failed car position indicator
  4. A misadjusted door closer

Explanation

Downward drift with the pump off indicates hydraulic fluid is escaping past the check or lowering valve. These valves hold the car in position when the pump is idle. Guide shoes, door closers, and indicators do not control holding pressure.

Question 34Elevating Devices

A mechanic is verifying that the car door will not open at a landing unless the car is within the unlocking zone. Which device performs this function?

  1. The counterweight guide shoe
  2. The pit ladder
  3. The door zone switch or unlocking zone detector Correct answer.
  4. The governor rope tension pulley

Explanation

A door zone switch or unlocking zone detector permits door unlocking only when the car is within the zone at a landing. This prevents doors opening in the hoistway between floors. The other items have no role in door unlocking.

Question 35Elevating Devices

A traction elevator is being tested for governor trip speed. The rated speed is 1.5 m/s. Which statement about the trip speed setting is correct?

  1. The governor must trip at half the rated speed
  2. The governor must trip at a speed above the rated speed but within the range specified by the code for that rated speed Correct answer.
  3. The governor trip speed is set by the building owner
  4. The governor must trip exactly at the rated speed

Explanation

The governor trip speed must be above rated speed so normal operation is not interrupted, but within the code-specified range for that rated speed. It is a mechanical setting verified during acceptance and periodic tests. Neither the owner nor an arbitrary fraction determines it.

Question 36Elevating Devices

During a test, a mechanic finds that the safety gear on a traction elevator fails to grip the guide rails when the governor trips. What is the immediate consequence for the installation?

  1. The elevator may remain in service if a sign is posted
  2. The elevator may remain in service if the governor is adjusted to trip sooner
  3. The elevator may remain in service if the car is operated at reduced speed
  4. The elevator must be taken out of service until the safety gear is repaired and retested Correct answer.

Explanation

Safety gear is the primary overspeed protection; if it fails to grip, the car has no reliable means of stopping in an overspeed event. The unit must be removed from service until repaired and successfully retested. Speed restrictions or signs do not restore this protection.

Question 37Elevating Devices

A mechanic must verify that the elevator brake can hold the car with rated load. Which test is appropriate?

  1. Listen for brake noise during acceleration
  2. Measure the brake coil resistance with a meter
  3. Load the car to rated load, run it to a landing, stop, and confirm the brake holds the car stationary Correct answer.
  4. Run the car empty at contract speed and observe the brake lining

Explanation

A brake holding test requires the car to be loaded to rated load and stopped, then observed for any movement. This confirms the brake can hold the loaded car. Coil resistance and noise observations do not demonstrate holding capacity.

Question 38Elevating Devices

An elevator car has a rated load of 1,000 kg. The owner wants to routinely carry 1,200 kg. What is the correct response?

  1. The rated load may be exceeded if the counterweight is removed
  2. The rated load cannot be exceeded; the equipment must be re-evaluated and re-rated by a qualified person before any change Correct answer.
  3. The rated load may be exceeded if the car is operated slowly
  4. The rated load may be exceeded if passengers are asked to stand still

Explanation

Rated load is a design limit tied to the machine, ropes, safeties, and structural capacity. Exceeding it without engineering re-evaluation is unsafe and non-compliant. Speed reduction, counterweight removal, or passenger instructions do not increase capacity.

Question 39Elevating Devices

A mechanic observes that car leveling accuracy has degraded and passengers are tripping at landings. Which combination best explains the likely causes?

  1. A missing capacity plate and a dull paint finish
  2. Worn guide shoes or rail alignment and a drifting leveling sensor Correct answer.
  3. A burned-out car light and a noisy fan
  4. A failed pit ladder and a loose machine room door

Explanation

Leveling accuracy depends on guide shoe condition, rail alignment, and sensor feedback. Wear or misalignment allows the car to sit off-level, and a drifting sensor can cause inconsistent stops. The other listed items have no effect on leveling.

Question 40Elevating Devices

A hydraulic elevator with an underground cylinder shows a gradual loss of oil with no visible spill in the machine room. What is the most likely explanation?

  1. The oil is evaporating from the reservoir
  2. The cylinder or its piping is leaking into the surrounding ground Correct answer.
  3. The car is overloaded
  4. The pump is over-pressurizing the system

Explanation

Underground cylinders and buried piping can leak into the surrounding soil, so oil loss with no visible spill suggests a below-ground leak. This is an environmental and safety concern requiring investigation. Evaporation, over-pressurization, and overloading do not explain gradual loss.

Question 41Elevating Devices

A contractor is modernizing the controller on an existing elevator. Which consideration is most important before work begins?

  1. Replacing the car interior first
  2. Choosing the controller with the lowest purchase price
  3. Painting the machine room before installation
  4. Confirming that the new controller is compatible with the existing machine, safeties, and code requirements Correct answer.

Explanation

A controller modernization must be compatible with the existing driving machine, safety devices, and applicable code. Compatibility determines whether the system will operate safely and pass inspection. Price, painting, and cosmetics are secondary.

Question 42Elevating Devices

A building has two elevators on group control, and one unit is removed from service for repair. What is the most appropriate action?

  1. Shut down the remaining car to keep the group balanced
  2. Disable the hall call buttons on all floors
  3. Leave the group control unchanged so calls are assigned to the out-of-service car
  4. Reconfigure the group control so the remaining car serves all calls and post notice of the reduced service Correct answer.

Explanation

When one car is out of service, the group control should be reconfigured so the remaining car accepts all calls. This maintains service and avoids unanswered calls. Leaving the group unchanged or shutting down the working car reduces availability.

Question 43Elevating Devices

A mechanic finds that the car enclosure has a broken panel fastener leaving a sharp edge accessible to passengers. What is the correct action?

  1. Ignore the defect because it is cosmetic
  2. Cover the sharp edge with tape and return the car to service indefinitely
  3. Remove the panel entirely and leave the opening
  4. Repair or secure the panel and remove the hazard before returning the car to service Correct answer.

Explanation

A sharp accessible edge in the car enclosure is a hazard to passengers and must be corrected before the car returns to service. A permanent repair or secure fastening is required. Tape or removal of the panel does not provide a compliant fix.

Question 44Elevating Devices

A mechanic is preparing to perform routine maintenance inside a hoistway. Which practice is required?

  1. Disable the hoistway lighting to save energy
  2. Ride on the car crosshead at contract speed
  3. Work alone without any communication
  4. Use the car top as a work platform with the inspection control and verify stop switches are functional Correct answer.

Explanation

Hoistway maintenance is performed from the car top using inspection operation, with functional stop switches verified. This allows controlled movement and a means to stop. Riding at contract speed, working without communication, or disabling lighting are unsafe.

Question 45Elevating Devices

A newly installed elevator is undergoing acceptance testing. Which sequence best reflects the process?

  1. Carry passengers first, then schedule testing
  2. Rely on the manufacturer's statement in place of inspection
  3. Test only the door operation and skip the rest
  4. Verify construction and safety devices, perform required tests, then obtain the inspection certificate before carrying passengers Correct answer.

Explanation

Acceptance requires verification of construction and safety devices and performance of the required tests. The certificate is issued only after successful inspection, and passengers may not be carried before that. Skipping tests or relying on statements is not acceptable.

Question 46Elevating Devices

An elevator with a rated speed of 2.5 m/s experiences a car overspeed. The governor is designed to trip above the rated speed. Which statement best describes the intended sequence?

  1. The governor trips, the safety gear applies, and the car decelerates to a stop Correct answer.
  2. The buffer absorbs the car's energy at the top landing
  3. The final limit switch opens and the car coasts to a stop
  4. The door interlock opens and the car stops at the next landing

Explanation

On overspeed, the governor trips and mechanically applies the safety gear, which grips the guide rails and decelerates the car. The final limit switch, door interlock, and top-landing buffer are not part of this sequence. Buffers act only at the pit.

Question 47Elevating Devices

A mechanic is evaluating a traction elevator where the car stops during a safety gear test, but the measured stopping distance slightly exceeds the code limit. What is the most appropriate conclusion?

  1. The test should be repeated with a lighter load until it passes
  2. The safety gear or governor linkage requires adjustment and retesting before acceptance Correct answer.
  3. The brake should be adjusted to compensate
  4. The result is acceptable because the car stopped

Explanation

Stopping distance during a safety gear test is a code-defined acceptance criterion related to deceleration and passenger safety. Exceeding the limit indicates the gear or linkage needs adjustment and retesting. Accepting the result or altering test conditions is not appropriate.

Question 48Elevating Devices

A mechanic is troubleshooting a traction elevator that intermittently stops with the car empty and no call registered. Which combination of causes is most plausible?

  1. A worn counterweight guide shoe
  2. A dirty car light diffuser
  3. A low oil level in the hydraulic reservoir
  4. A marginal door interlock contact or a loose safety circuit connection opening under vibration Correct answer.

Explanation

Intermittent stops with no call point to a safety circuit opening, often a marginal interlock contact or loose connection affected by vibration. These circuits stop the car when they open. Guide shoes, light diffusers, and hydraulic oil do not cause this symptom on a traction unit.

Question 49Elevating Devices

A mechanic must determine whether a car's rated load can be increased after a modernization. Which factor is most decisive?

  1. Whether the machine, ropes, safeties, and structure have been evaluated and found adequate for the higher load Correct answer.
  2. Whether the car interior has been upgraded
  3. Whether the building owner prefers a higher number
  4. Whether the hall fixtures have been replaced

Explanation

Rated load is limited by the mechanical and structural capacity of the machine, ropes, safeties, and supporting structure. Increasing it requires engineering evaluation confirming adequacy. Cosmetic upgrades, fixture replacement, or owner preference do not establish capacity.

Question 50Elevating Devices

A mechanic is assessing an elevator where the machine room temperature regularly exceeds the manufacturer's limit. What is the most appropriate action?

  1. Reduce the elevator speed to compensate
  2. Correct the ventilation or cooling so the machine room stays within the manufacturer's specified range Correct answer.
  3. Ignore the condition because it only affects comfort
  4. Increase the brake spring tension

Explanation

Excess machine room temperature can cause controller faults, oil degradation, and premature component failure. The correct action is to restore ventilation or cooling to the manufacturer's range. Speed changes or brake adjustments do not address the root cause.