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OH Elevator Mechanic practice questions

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Question 1Elevator and Escalator Code Compliance

Under the Ohio elevator code, how often must a licensed elevator inspector perform a routine inspection of a passenger elevator in normal service?

  1. Every 12 months
  2. Every 24 months
  3. Twice every 12 months Correct answer.
  4. Every 5 years

Explanation

Ohio Revised Code 4105.10(A)(1) requires ordinary passenger elevators to be inspected twice every 12 months. This frequency applies to normal passenger service. The statutory wording does not require a universally exact six-calendar-month interval between inspections.

Question 2Elevator and Escalator Code Compliance

A hydraulic elevator in Ohio service has its relief valve set above the pressure that the code permits. What is the primary safety concern that the setting limit addresses?

  1. Loss of leveling accuracy at upper floors
  2. Rupture of the cylinder, piping, or fittings from overpressure Correct answer.
  3. Excessive oil temperature during standby
  4. Premature wear of the plunger packing

Explanation

The relief valve limits system pressure so that the cylinder, piping, and fittings are not subjected to pressures beyond their design rating. Overpressure protection prevents catastrophic rupture of the hydraulic circuit. Temperature, packing wear, and leveling are maintenance concerns, not the purpose of the relief valve setting limit.

Question 3Elevator and Escalator Code Compliance

During a code-required test, a car door is found to close with more kinetic energy than the limits allow. Which adjustment most directly addresses excessive door closing force?

  1. Increasing the door open dwell time
  2. Increasing the door operator closing speed
  3. Tightening the door track roller clearance
  4. Reducing the closing force limit setting on the door operator Correct answer.

Explanation

The code limits the kinetic energy and closing force of power-operated doors to protect passengers from injury. The door operator's closing force limit is the component that governs this value and must be adjusted to bring the door within limits. Speed, dwell time, and roller clearance do not directly set the closing force limit.

Question 4Elevator and Escalator Code Compliance

What is the required function of the car emergency stop switch or the in-car stop control on an elevator?

  1. It must transfer the car to emergency recall operation
  2. It must open the car door automatically
  3. It must only silence the alarm bell
  4. It must remove power from the driving machine and keep the car stopped until reset Correct answer.

Explanation

The stop control is a safety device that removes power from the driving machine and prevents further motion until it is deliberately reset. It is distinct from alarm and recall functions. Confusing it with alarm silencing or door operation would defeat its protective purpose.

Question 5Elevator and Escalator Code Compliance

A machine-room-less elevator is installed in an Ohio building. Which code provision governs the clearance and access requirements for the machinery space?

  1. Only the building's general electrical code applies
  2. The requirements for a traditional machine room apply unchanged
  3. The code provisions for machinery spaces located inside the hoistway apply Correct answer.
  4. No machinery space requirements apply to MRL units

Explanation

Machine-room-less equipment is covered by specific code provisions for machinery located within the hoistway, addressing working space, access, and guarding. Traditional machine-room rules do not simply carry over, and the equipment is not exempt from machinery space requirements.

Question 6Elevator and Escalator Code Compliance

Which device is required to prevent an elevator car from moving with its doors open unless the car is within the unlocking zone?

  1. The governor overspeed switch
  2. The pit stop switch
  3. The door interlock and car door contact circuit Correct answer.
  4. The buffer return spring

Explanation

Door interlocks and car door contacts form the circuit that permits car motion only when doors are closed and locked, except within the unlocking zone. This prevents movement with an open door. Governors, buffers, and pit switches serve different protective functions.

Question 7Elevator and Escalator Code Compliance

An escalator in a public building must be equipped with a skirt guard and a combplate. What hazard do these components primarily address?

  1. Failure of the handrail drive chain
  2. Overloading of the drive motor
  3. Electrical shock from the controller
  4. Entrapment of footwear and clothing at the step-to-skirt and step-to-combplate interfaces Correct answer.

Explanation

Skirt guards and combplates are designed to reduce entrapment hazards where passengers' footwear and clothing contact moving steps and stationary surfaces. They address mechanical entrapment, not electrical, motor load, or handrail drive issues. These interfaces are a recognized focus of escalator safety requirements.

Question 8Elevator and Escalator Code Compliance

Which condition triggers the firefighter's emergency recall operation for an elevator in a building with a detected fire alarm?

  1. Opening of the car door at a landing
  2. Loss of normal power to the building
  3. Activation of the alarm initiating device in the designated recall areas Correct answer.
  4. Pressing the car call button

Explanation

Fire recall is initiated by smoke detectors or other alarm devices in designated areas such as the lobby, machine room, or hoistway. The car is then returned to the designated landing and parked with doors open. Door operation, car calls, and power loss do not by themselves initiate recall.

Question 9Elevator and Escalator Code Compliance

An inspector measures the clearance between the car door and the hoistway door at a landing. Which code concept governs the maximum permitted gap at this location?

  1. The gap must equal the thickness of the door panel
  2. The gap must be limited to prevent a hand or object from being caught or reaching hazardous parts Correct answer.
  3. The gap is unregulated as long as the doors operate
  4. The gap must be large enough to prevent rubbing during travel

Explanation

Clearances at landing doors and car doors are limited to prevent passengers from being caught or reaching into hazardous areas. Excessive gaps create entrapment and access hazards. The requirement is a maximum limit, not a minimum for rubbing avoidance, and the clearance is regulated.

Question 10Elevator and Escalator Code Compliance

A traction elevator is being tested for governor tripping speed. The governor must trip at a speed related to the rated speed. Which statement correctly describes the code intent for the governor trip speed?

  1. The governor must trip before the car reaches 115 percent of rated speed Correct answer.
  2. The governor must trip at exactly the rated speed
  3. The governor trip speed is unrelated to rated speed
  4. The governor must trip only after the car exceeds 150 percent of rated speed

Explanation

The overspeed governor is set to trip at a speed above rated speed but below the maximum permitted threshold, commonly expressed as a percentage of rated speed such as 115 percent. Tripping at rated speed would cause nuisance stops, and tripping too late would allow dangerous overspeed. The trip point is therefore tied to rated speed within a defined band.

Question 11Elevator and Escalator Code Compliance

During a safety test, the car is run onto its buffers. What is the required characteristic of oil buffers used for elevators with rated speeds above the limit for spring buffers?

  1. They must lock the car in place permanently
  2. They must return the car to the top landing automatically
  3. They must absorb energy and limit the deceleration of the car within code limits Correct answer.
  4. They must sound an alarm when compressed

Explanation

Oil buffers are energy-absorbing devices designed to stop the car or counterweight within a controlled deceleration and stroke. They protect occupants and equipment from excessive impact forces. They do not return the car, sound alarms, or permanently lock the car.

Question 12Elevator and Escalator Code Compliance

A maintenance worker needs to enter the pit of a running elevator. Which code-required provision protects the worker while in the pit?

  1. A portable barrier at the landing
  2. A second worker stationed in the car
  3. A pit stop switch that removes power from the driving machine and prevents movement Correct answer.
  4. A sign posted at the landing

Explanation

The pit must be provided with a stop switch that, when opened, removes power from the driving machine and prevents car motion, protecting workers in the pit. Signs, attendants, and barriers are helpful but do not substitute for the required electrical protection. The pit switch is the code-mandated safeguard.

Question 13Elevator and Escalator Code Compliance

An escalator is equipped with an emergency stop button at the top and bottom landings. What must occur when the button is pressed?

  1. The escalator stops and remains stopped until deliberately reset Correct answer.
  2. Only the handrail stops while steps continue
  3. The escalator continues at reduced speed
  4. The escalator reverses direction

Explanation

The emergency stop device must stop the escalator and require a deliberate reset before restart, so that the hazard is cleared before operation resumes. Reduced speed, reversal, or stopping only the handrail would not satisfy the safety intent. The stop must be effective and latching.

Question 14Elevator and Escalator Code Compliance

A new elevator installation includes a car with a rated load and rated speed. Which factor determines the required number and type of suspension ropes or the equivalent suspension means?

  1. The building's occupancy classification alone
  2. The color of the car interior
  3. The rated load, rated speed, and code safety factors for suspension members Correct answer.
  4. The number of floors served

Explanation

Suspension members are sized by code formulas that consider rated load, rated speed, and required safety factors, along with the number of ropes. Interior finish, floor count, and occupancy alone do not determine suspension requirements. The design must provide adequate strength and redundancy.

Question 15Elevator and Escalator Code Compliance

An inspector finds that the counterweight of a traction elevator is not provided with a guard. Under what circumstance is a counterweight guard required?

  1. When the counterweight travels in a hoistway space accessible to persons or where required by code Correct answer.
  2. Only when the counterweight is visible from the lobby
  3. Never, because counterweights are always enclosed
  4. Only when the building exceeds ten stories

Explanation

Counterweight guards are required where the counterweight is located in a hoistway space that could be accessed by persons or where the code specifies protection. The guard prevents contact with the moving counterweight. Visibility from a lobby or building height alone is not the governing criterion.

Question 16Elevator and Escalator Code Compliance

Which requirement applies to the illumination of the elevator car and the landing area during normal operation?

  1. Landing lighting is the responsibility of the tenant
  2. Only emergency lighting is required
  3. Car and landing illumination must be provided at code-specified levels Correct answer.
  4. Car lighting may be omitted if the car has a window

Explanation

The code requires specified illumination levels in the car and at landings so passengers can see and use the equipment safely. Lighting cannot be omitted based on a car window, and responsibility is not left to the tenant. Emergency lighting is an additional requirement, not a substitute.

Question 17Elevator and Escalator Code Compliance

A hydraulic elevator's plunger stops and the car settles downward slowly after the car has been parked. Which code-required device is intended to prevent uncontrolled downward movement in the event of a piping failure?

  1. The counterweight guide shoe
  2. The check valve or rupture valve in the hydraulic circuit Correct answer.
  3. The governor rope tension device
  4. The car door interlock

Explanation

A check valve or rupture valve is installed in the hydraulic circuit to stop the flow of oil and prevent uncontrolled descent if a pipe or fitting fails. Door interlocks, governor tension devices, and guide shoes serve unrelated functions. This protection is specific to hydraulic elevator piping integrity.

Question 18Elevator and Escalator Code Compliance

An escalator's handrail must move at a speed related to the step speed. What is the code requirement for the handrail speed relative to the steps?

  1. The handrail must move slower than the steps at all times
  2. The handrail may move at any speed independent of the steps
  3. The handrail must move faster than the steps at all times
  4. The handrail speed must be synchronized with the step speed within a specified tolerance Correct answer.

Explanation

Handrails must move at essentially the same speed as the steps, within a specified tolerance, so passengers are not thrown off balance. A handrail that consistently runs faster or slower creates a fall hazard. The requirement is synchronization within tolerance, not independent or deliberately offset speeds.

Question 19Elevator and Escalator Code Compliance

An elevator is installed in a building where the hoistway is required to be fire-rated. Which provision addresses the protection of the hoistway openings at each landing?

  1. Only the bottom landing requires a door
  2. Hoistway doors must be of the required fire-resistive rating and self-closing Correct answer.
  3. Hoistway doors may be held open by wedges
  4. Landing doors may be omitted on upper floors

Explanation

Hoistway landing doors must meet the required fire-resistive rating and be self-closing to protect the shaft opening and limit fire and smoke spread. Doors cannot be omitted, propped open, or limited to one landing. Fire-rated hoistway enclosures depend on compliant landing doors.

Question 20Elevator and Escalator Code Compliance

A traction elevator's machine brake must be capable of holding the car at rest with rated load. Which characteristic is required of the brake?

  1. It must be disengaged whenever the car is at a landing
  2. It must be adjustable by passengers
  3. It must be applied by power and released by spring
  4. It must be applied by spring or gravity and released by power Correct answer.

Explanation

The machine brake must be of the type that applies automatically by spring or gravity and is released by power, so that a power failure results in braking rather than loss of braking. Power-applied, spring-released brakes would fail dangerously on power loss. Passenger adjustment and automatic disengagement at landings are not permitted.

Question 21Elevator and Escalator Code Compliance

An inspector is evaluating a newly installed elevator for compliance with the requirement that the car be provided with a means to prevent the car from being started with an open hoistway door. Which arrangement satisfies this requirement?

  1. A warning sign on the hoistway door
  2. A car light that indicates the door is open
  3. A door interlock that must be engaged before the car can move Correct answer.
  4. A door closer that shuts the door after a delay

Explanation

The door interlock is the electrical and mechanical device that prevents car movement unless the hoistway door is closed and locked. Signs, closers, and indicator lights are not substitutes for the interlock function. The interlock is a fundamental safety circuit component.

Question 22Elevator and Escalator Code Compliance

During a periodic inspection, the inspector must verify that the elevator's emergency communication means functions. Which statement best describes the code intent for two-way communication in the car?

  1. It must automatically call the fire department
  2. It must record conversations for the building owner
  3. It must allow a person in the car to summon aid from a location where the building is staffed or monitored Correct answer.
  4. It must broadcast an alarm audible throughout the building

Explanation

Two-way communication is intended to let a trapped passenger reach a location where assistance can be summoned, such as a building lobby, security desk, or monitoring service. It is not required to be a building-wide alarm, an automatic fire department call, or a recording system. The focus is reliable contact with a responsible party.

Question 23Elevator and Escalator Code Compliance

A traction elevator uses a governor with a rope that operates the safety mechanism. If the governor rope breaks or loses tension, what must the governor rope tension device do?

  1. It must retract the governor rope into the machine room
  2. It must reset the governor trip speed
  3. It must apply the car safety mechanism or cause the car to stop Correct answer.
  4. It must sound a bell only

Explanation

The governor rope tension device is designed so that loss of governor rope tension, such as from a broken rope, will cause the safety mechanism to apply or the car to stop. This prevents loss of overspeed protection. A bell, rope retraction, or trip speed reset would not provide the required protection.

Question 24Elevator and Escalator Code Compliance

An escalator is installed with a balustrade and a newel end. Which requirement governs the height and configuration of the balustrade to prevent passengers from falling over the side?

  1. The balustrade must be at least three meters high
  2. The balustrade may be omitted if the escalator is adjacent to a wall
  3. The balustrade must meet code-specified height and smoothness requirements and resist a specified force Correct answer.
  4. The balustrade height is determined by the building architect without code limits

Explanation

Balustrades must meet specified height, smoothness, and structural resistance requirements so passengers cannot easily fall over or be caught. The design is governed by code limits, not architect discretion, and a wall on one side does not eliminate the requirement. A three-meter height is far beyond the code minimum.

Question 25Elevator and Escalator Code Compliance

A building owner wants to modernize an existing elevator's controller. Which code principle applies to alterations of existing elevators in Ohio?

  1. Existing elevators are permanently exempt from all code requirements
  2. Alterations must comply with the code provisions applicable to the altered equipment, and certain retroactive requirements may apply Correct answer.
  3. Only the electrical code applies to controller changes
  4. Alterations may ignore safety circuit requirements if the car is old

Explanation

Alterations must comply with the code provisions that apply to the altered equipment, and certain requirements may be applied retroactively for safety. Existing elevators are not permanently exempt, and safety circuit requirements cannot be ignored because of the car's age. The electrical code alone does not cover elevator safety provisions.

Question 26Elevator and Escalator Code Compliance

Under the elevator code, what is the minimum required clearance between the hoistway door sill and the car door sill when the car is at rest at a landing?

  1. 1/2 inch Correct answer.
  2. 1 inch
  3. 3/4 inch
  4. 1 1/2 inches

Explanation

The code limits the horizontal gap between the car and hoistway door sills to reduce the risk of a passenger's foot or hand being caught or a small object falling through. The maximum permitted sill clearance is 1/2 inch, and it must be maintained at every landing.

Question 27Elevator and Escalator Code Compliance

Which component is required at each landing to prevent a passenger from being struck by a moving car or counterweight when the hoistway door is open?

  1. A hoistway door interlock and door closed and locked contact Correct answer.
  2. A pit stop switch
  3. A governor rope tension device
  4. A car door interlock

Explanation

The interlock mechanically prevents the car from moving unless the hoistway door is closed and locked, and the closed-and-locked contact verifies that condition electrically. Together they keep the car from moving while a landing door is open.

Question 28Elevator and Escalator Code Compliance

A new escalator is being installed in a shopping center. What is the maximum permitted rise for a single escalator run?

  1. 40 feet
  2. 20 feet
  3. 30 feet
  4. 60 feet Correct answer.

Explanation

The code limits the vertical rise of a single escalator to 60 feet to keep the ride within safe parameters for the step chain and handrail. Installations needing greater rise must use multiple runs or another means of vertical transportation.

Question 29Elevator and Escalator Code Compliance

What is the required minimum depth of the pit for a passenger elevator, measured from the lowest landing sill to the pit floor, when the rated speed is 200 feet per minute?

  1. 4 feet 0 inches
  2. 5 feet 0 inches
  3. 2 feet 0 inches
  4. 3 feet 0 inches Correct answer.

Explanation

Pit depth is set by a table based on rated speed so that the car, its buffer, and the safety devices have adequate clearance. For a rated speed of 200 feet per minute, the minimum pit depth is 3 feet 0 inches.

Question 30Elevator and Escalator Code Compliance

A hydraulic elevator uses a plunger that extends from the cylinder. Which device must be provided to stop the car if the hydraulic line ruptures?

  1. A counterweight buffer
  2. A car door restrictor
  3. A governor-operated safety
  4. A plunger grip or rupture valve Correct answer.

Explanation

A rupture valve or plunger grip closes automatically when hydraulic flow exceeds a set rate, stopping the car from descending uncontrolled after a line break. Traction-type safeties and counterweight buffers are not used for this purpose on a hydraulic unit.

Question 31Elevator and Escalator Code Compliance

An inspector is checking the escalator step demarcation. What is the purpose of the yellow demarcation strips on the leading and trailing edges of each step?

  1. To show the direction of travel
  2. To mark the step for maintenance records
  3. To indicate the maximum load per step
  4. To warn passengers of the step edge to reduce tripping Correct answer.

Explanation

Demarcation strips make the step edge visible so passengers can see where to place their feet and avoid tripping at the combplate or between steps. They are a visibility and safety feature, not a load or maintenance indicator.

Question 32Elevator and Escalator Code Compliance

What is the required minimum height of the escalator balustrade, measured vertically from the step tread to the top of the handrail?

  1. 42 inches
  2. 48 inches
  3. 36 inches Correct answer.
  4. 30 inches

Explanation

The balustrade and handrail must be high enough to discourage passengers from leaning over or falling off the side. The code minimum vertical height from the step tread to the top of the handrail is 36 inches.

Question 33Elevator and Escalator Code Compliance

Which document is the model safety code most commonly adopted by states for elevators and escalators, including Ohio?

  1. ISO 9001 Quality Standard
  2. ASME A17.1/CSA B44 Safety Code for Elevators and Escalators Correct answer.
  3. NFPA 70 National Electrical Code
  4. ASME A112 Plumbing Code

Explanation

ASME A17.1/CSA B44 is the model safety code for elevators and escalators that jurisdictions adopt and enforce, often with local amendments. Inspectors and mechanics must know its requirements along with any state-specific rules.

Question 34Elevator and Escalator Code Compliance

During a periodic inspection, the inspector finds that the elevator's car top light and stop switch are missing. Which requirement applies to the top of the car?

  1. Only a light is required because the car top is not a working area
  2. Neither is required if the car top is less than 6 feet above the landing
  3. A light and a stop switch are required on the car top for maintenance personnel Correct answer.
  4. Only a stop switch is required because the light is provided by the hoistway

Explanation

Personnel performing maintenance on the car top need illumination to see the equipment and a stop switch to halt the car from that location. The code requires both a car top light and a car top stop switch.

Question 35Elevator and Escalator Code Compliance

An escalator is being installed with a skirt panel on each side. What is the maximum permitted clearance between the skirt panel and the step tread?

  1. 3/16 inch
  2. 1/8 inch Correct answer.
  3. 1/16 inch
  4. 1/4 inch

Explanation

The skirt-to-step clearance is limited to prevent objects and clothing from being drawn into the gap. The maximum permitted clearance between the skirt panel and the step is 1/8 inch.

Question 36Elevator and Escalator Code Compliance

A traction elevator's car is equipped with a governor-operated safety. At what point must the safety apply to stop the car?

  1. When the car door opens unexpectedly
  2. When the counterweight reaches the buffer
  3. When the car overspeeds and the governor trips Correct answer.
  4. When the car reaches 90 percent of rated speed

Explanation

The governor trips at a set overspeed and actuates the safety, which grips the guide rails to stop the car. Normal operation at or below rated speed does not trip the governor.

Question 37Elevator and Escalator Code Compliance

An inspector is verifying the electrical protective devices on an escalator. Which device is required to stop the escalator if a foreign object becomes caught at the combplate?

  1. A combplate switch Correct answer.
  2. A handrail speed monitor
  3. A step chain tension switch
  4. A balustrade deflection switch

Explanation

The combplate switch detects displacement or obstruction at the combplate and stops the escalator before a passenger is injured. It is one of several required protective devices, but it specifically addresses combplate entrapment.

Question 38Elevator and Escalator Code Compliance

A new installation includes a machine room. What is the required minimum headroom above the machine room floor?

  1. 6 feet 0 inches
  2. 7 feet 6 inches
  3. 8 feet 0 inches
  4. 7 feet 0 inches Correct answer.

Explanation

The machine room must provide safe working clearance for maintenance personnel and equipment. The code requires a minimum headroom of 7 feet 0 inches above the machine room floor.

Question 39Elevator and Escalator Code Compliance

An elevator is being installed with a counterweight. Which device must be provided to stop the counterweight if the hoist ropes slack?

  1. A governor rope tension device
  2. A door restrictor
  3. A car buffer
  4. A counterweight safety or rope slack switch Correct answer.

Explanation

If the hoist ropes go slack, the counterweight can fall or the car can lose traction; a rope slack switch detects the condition and stops the machine. A counterweight safety provides mechanical protection where required.

Question 40Elevator and Escalator Code Compliance

An inspector measures the horizontal clearance between the inside of the hoistway and the car enclosure. What is the purpose of limiting this clearance?

  1. To provide space for the counterweight
  2. To allow for thermal expansion of the guide rails
  3. To reduce the electrical load on the machine
  4. To prevent a passenger from reaching the hoistway and to keep the car from striking the hoistway Correct answer.

Explanation

Limiting the clearance between the car and hoistway prevents passengers from reaching through openings and keeps the car from contacting hoistway structures during travel. It is a safety clearance, not an electrical or thermal allowance.

Question 41Elevator and Escalator Code Compliance

A building installs a new escalator adjacent to a wall. What is the required minimum distance from the handrail to the wall to prevent a passenger from being caught?

  1. 2 inches
  2. 1 inch
  3. 4 inches
  4. 3 inches Correct answer.

Explanation

A minimum clearance between the handrail and any adjacent wall or obstruction is required to prevent a passenger's hand or clothing from being pinched. The code requires at least 3 inches of clearance.

Question 42Elevator and Escalator Code Compliance

A mechanic is testing the elevator's final limit switch. What is the function of this switch?

  1. To stop the car when the governor trips
  2. To stop the car if it travels beyond the normal terminal stopping point Correct answer.
  3. To stop the car when the buffer is struck
  4. To stop the car when the door is open

Explanation

The final limit switch is a backup to normal terminal stopping and cuts power if the car overtravels past the normal stopping zone. It prevents the car from reaching the buffers at speed.

Question 43Elevator and Escalator Code Compliance

An inspector finds that the elevator's car emergency communication means is a one-way intercom. Which requirement applies?

  1. A telephone is required in every car
  2. A one-way intercom is sufficient if it is monitored
  3. Two-way voice communication must be provided between the car and a designated location Correct answer.
  4. An alarm bell is required in place of communication

Explanation

The code requires two-way voice communication so that a trapped passenger can both report the emergency and receive instructions. A one-way intercom does not allow the passenger to hear the responder.

Question 44Elevator and Escalator Code Compliance

A new escalator is installed with a step width of 40 inches. What is the required minimum width of the step tread?

  1. 48 inches
  2. 40 inches Correct answer.
  3. 24 inches
  4. 32 inches

Explanation

The step width is the nominal width of the escalator, and the step tread must be at least that width to provide a continuous walking surface. For a 40-inch escalator, the minimum step tread width is 40 inches.

Question 45Elevator and Escalator Code Compliance

An elevator machine room contains the driving machine and controller. Which requirement applies to the machine room door?

  1. It must be a solid wood door
  2. It must be left open during operation
  3. It must be self-closing and self-locking Correct answer.
  4. It must be provided with a window

Explanation

The machine room door must be self-closing and self-locking to keep unauthorized persons out and to maintain the fire separation of the room. It must be opened only by authorized personnel.

Question 46Elevator and Escalator Code Compliance

A hydraulic elevator's car is settling downward after being parked at a landing. Which condition most likely explains this and what code requirement applies?

  1. A leaking cylinder or valve; the code requires means to prevent uncontrolled descent Correct answer.
  2. A misadjusted door interlock; the code requires door restrictors
  3. A worn guide shoe; the code requires guide rail lubrication
  4. A faulty governor; the code requires governor testing

Explanation

Settling indicates hydraulic fluid is bypassing the cylinder packing or valve, which can lead to uncontrolled descent. The code requires a means such as a rupture valve or plunger grip to stop the car if the hydraulic system fails.

Question 47Elevator and Escalator Code Compliance

An inspector is evaluating the buffer stroke for an oil buffer on a traction elevator with a rated speed of 500 feet per minute. What governs the required buffer stroke?

  1. The number of hoist ropes
  2. The size of the machine room
  3. The height of the hoistway
  4. The rated speed and the total mass of the car and its load Correct answer.

Explanation

Buffer stroke is determined by the impact velocity and the mass being stopped, so the rated speed and the total moving mass set the requirement. Oil buffers are used at higher speeds to decelerate the car within a safe distance.

Question 48Elevator and Escalator Code Compliance

An escalator is being tested for stopping distance. What is the purpose of the code limit on the stopping distance after the emergency stop button is pressed?

  1. To ensure passengers are not thrown forward and the steps stop within a safe distance Correct answer.
  2. To keep the step chain from stretching
  3. To reduce wear on the brake
  4. To allow the handrail to continue moving

Explanation

Limiting stopping distance prevents passengers from being thrown forward or injured when the escalator stops abruptly. The brake must stop the steps within the code-specified distance under rated load.

Question 49Elevator and Escalator Code Compliance

A traction elevator's car is equipped with a governor. The governor rope is found to be broken. What is the immediate consequence for the safety function?

  1. The safety cannot be actuated by the governor and the car must be removed from service Correct answer.
  2. The car will continue to operate normally with no effect
  3. The safety will still operate because it is spring-loaded
  4. The door interlock will prevent car movement

Explanation

The governor rope transmits the governor's tripping action to the safety mechanism; if it is broken, the safety cannot be actuated. The car must be taken out of service until the rope is replaced and the governor tested.

Question 50Elevator and Escalator Code Compliance

An inspector is reviewing a new elevator installation with a rated load of 2,500 pounds. Which factor determines the required number of hoist ropes?

  1. The rated load, car weight, and rope safety factor Correct answer.
  2. The number of landings served
  3. The size of the car door
  4. The height of the machine room

Explanation

The number and strength of hoist ropes must provide a safety factor based on the total suspended load, including the car, its rated load, and the ropes themselves. Landings, machine room height, and door size do not govern rope count.