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Nevada Master Elevator Mechanic
Certification Exam Practice Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A | Instant
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- What is the maximum allowable speed for a passenger elevator with a travel distance of 100 feet according to the ASME A17.1 code? A. 150 ft/min B. 200 ft/min C. 350 ft/min D. 500 ft/min The ASME A17.1 code specifies that elevators with travel less than 150 feet are limited to speeds of 350 ft/min for passenger service to ensure safe acceleration and deceleration.
- Which type of brake is most commonly used on traction elevators? A. Hydraulic disc brake B. Electromagnetic shoe brake C. Drum brake D. Pneumatic brake Traction elevators use electromagnetic shoe brakes because they provide reliable holding power and automatically engage when power is lost.
- What is the primary function of a governor in an elevator system? A. Control door operation B. Measure floor leveling C. Prevent overspeed conditions D. Regulate motor voltage
The governor detects overspeed conditions and activates the safety mechanism to stop the elevator car, preventing accidents.
- For a hydraulic elevator, what determines the pumping rate of the fluid? A. Weight of the cab B. Motor voltage C. Cylinder size and pump capacity D. Rope tension Hydraulic elevator speed is controlled by the size of the cylinder and the pump’s flow rate, which directly affects fluid movement.
- What is the minimum headroom required for an elevator machine room above the hoistway per code? A. 7 feet B. 8 feet C. 9 feet D. 10 feet ASME A17.1 requires a minimum of 10 feet of headroom in machine rooms to allow safe access and operation of the machinery.
- In a traction elevator, which component transfers motion from the motor to the hoist ropes? A. Sheave B. Governor C. Drive sheave D. Counterweight The drive sheave is attached to the motor and moves the hoist ropes, enabling the elevator car to ascend and descend.
- What is the purpose of an elevator’s buffer? A. Reduce vibration B. Assist in leveling C. Absorb impact if the car overruns the terminal floor D. Maintain rope tension Buffers are installed at the bottom of the hoistway to safely absorb energy if the car descends beyond its normal limit.
- Which type of control system allows elevators to respond to calls in multiple zones efficiently?
D. Nylon rope Steel wire ropes are used for traction elevators due to their strength, durability, and minimal stretch under load.
- In emergency power operation, which elevator feature is typically limited? A. Door opening B. Travel speed C. Alarm system D. Car lighting Elevators on emergency power usually operate at reduced speed to minimize load on the backup system while still providing essential service.
- What does a car sling consist of in an elevator? A. Door sensors B. Ropes and counterweight C. Framework supporting the elevator car and its platform D. Control panel The car sling is the structural frame that supports the cab and its mechanical components.
- Which safety device engages if the governor detects overspeed? A. Door lock B. Car frame C. Safety gear D. Counterweight brake Safety gear clamps onto the guide rails, stopping the elevator car if it moves faster than the rated speed, preventing accidents.
- What is the purpose of a phase converter in an elevator motor system? A. Increase torque B. Reduce vibration C. Allow single-phase power to operate a three-phase motor D. Adjust rope tension Phase converters enable three-phase motors to run on single-phase supply, which is common in buildings without three-phase service.
- How often must traction elevator ropes be inspected per code? A. Every month B. Every 3 months C. Every 6 months D. Every year ASME A17.1 requires traction ropes to be inspected at least semiannually to identify wear, corrosion, or broken strands.
- Which elevator component ensures level stopping at each floor? A. Governor B. Counterweight C. Leveling device D. Sheave The leveling device adjusts the elevator’s final stopping position to align accurately with the floor landing.
- What is the primary function of the buffer oil in a hydraulic elevator? A. Lubricate pump B. Increase pressure C. Cushion the car in case of overtravel D. Control speed Hydraulic buffers contain oil that compresses under impact, safely absorbing the energy if the elevator car descends too far.
- For a machine-room-less (MRL) elevator, where is the motor typically located? A. Basement B. Roof C. Inside the hoistway at the top D. Mechanical penthouse MRL elevators have compact designs with the traction motor mounted at the top of the hoistway to save space and eliminate a separate machine room.
- What is the primary hazard associated with elevator pit maintenance? A. Overheating B. Electrical shock
Microprocessor-based controls use algorithms to reduce wait and travel times, adjusting dispatching based on real-time demand.
- What is the recommended method for lubricating traction ropes? A. Spray oil continuously B. Apply rope lubricant sparingly as needed C. Dip rope in oil bath daily D. No lubrication required Ropes are lubricated only when necessary to prevent slippage or corrosion; over-lubrication can attract dust and reduce friction.
- In elevator terminology, what does “overspeed” refer to? A. Door opening too fast B. Car leveling too fast C. Car moving faster than its rated speed D. Motor exceeding voltage Overspeed occurs when the elevator car moves beyond its designed velocity, triggering safety devices.
- What type of hydraulic elevator uses a plunger mounted directly under the car? A. Roped hydraulic B. Direct-acting (or plunger) hydraulic C. Telescopic hydraulic D. Hole-less hydraulic Direct-acting hydraulic elevators have a single plunger beneath the car, providing direct lifting without ropes.
- Which component ensures electrical isolation between the car and building power? A. Transformer B. Motor controller with proper grounding C. Governor D. Counterweight The motor controller isolates the elevator from power surges and ensures safe operation through proper grounding and switching.
- What is the primary reason for having a separate machine room in traditional elevators?
A. Reduce noise B. Allow easy rope replacement C. Provide safe access to mechanical and electrical components D. Improve ride speed Machine rooms provide a safe, accessible location for maintenance of motors, controllers, and drive equipment away from passenger areas.
- Which safety device prevents the elevator car from moving when doors are open? A. Buffer B. Governor C. Door interlock D. Counterweight Door interlocks ensure the elevator cannot move unless all doors are fully closed, preventing accidents.
- How is the rated load of an elevator defined? A. Maximum number of passengers B. Maximum weight the car is designed to carry safely C. Rope tension limit D. Motor capacity The rated load specifies the safe carrying capacity, including passengers and cargo, for which the elevator system is designed.
- Which type of elevator typically uses a hole-less hydraulic system? A. Traction elevator B. Direct-acting hydraulic C. Telescopic plunger hydraulic D. Roped traction Hole-less hydraulic elevators use telescopic plungers that do not require a deep pit, allowing installation in buildings with limited basement depth.
- What is the function of an elevator’s leveling switch? A. Activate emergency brake B. Operate door locks C. Signal motor to stop at the correct floor level
- What is the primary reason for having a top-of-car emergency stop switch? A. Test door operation B. Activate buffer C. Immediately halt elevator movement during maintenance D. Signal fire alarm The top-of-car emergency stop allows technicians to stop the elevator instantly during maintenance or emergency situations.
- Which code section governs elevator electrical installation safety? A. ASME A17.1, Part I B. NEC Article 430 C. NEC Article 620 D. OSHA Section 1926 NEC Article 620 specifically addresses the electrical requirements for elevators, including wiring, disconnects, and grounding.
- What is the primary purpose of car and counterweight guides? A. Reduce rope tension B. Ensure stable and aligned vertical travel C. Absorb shock D. Control speed Guides provide lateral stability for the car and counterweight, ensuring smooth and safe vertical movement.
- Which elevator type is most energy-efficient for high-rise buildings? A. Hydraulic B. Direct-acting plunger C. Traction with counterweight D. Hole-less hydraulic Traction elevators with counterweights are more energy-efficient, especially at higher travel distances, because the counterweight offsets car weight and reduces motor energy consumption.
- What is the primary function of a load weighing device in an elevator? A. Control door speed
B. Prevent elevator overload C. Regulate motor RPM D. Signal fire alarm Load weighing devices ensure the car is not overloaded, preventing excessive strain on the hoist system and maintaining safe operation.
- Which type of elevator door operator is typically used in modern installations? A. Manual pulley B. Chain-driven C. Electrically powered sliding operator D. Hydraulic piston operator Electric sliding door operators are standard in modern elevators because they provide consistent, smooth door operation with safety features.
- Which maintenance activity is critical for traction sheaves? A. Cleaning car interior B. Lubricating bearings and inspecting grooves C. Adjusting door interlocks D. Checking pit depth Traction sheaves must be properly lubricated and inspected for wear in the rope grooves to ensure proper traction and safe operation.
- What is the maximum permitted car drift between floors under normal operation? A. 1 inch B. 0.5 inch C. 0.25 inch D. 2 inches ASME A17.1 limits car drift to 0.5 inch to ensure passenger safety and proper floor alignment.
- Which component prevents the elevator from moving during fire alarm activation in some systems? A. Governor B. Buffer C. Phase I recall system D. Car sling
- Which type of drive is commonly used in modern traction elevators for energy efficiency? A. Hydraulic pump B. Variable-frequency drive (VFD) C. Constant-voltage drive D. Manual crank VFDs allow precise motor speed control, reduce energy consumption, and provide smoother acceleration and deceleration.
- What is the function of the pit ladder in an elevator installation? A. Support the car B. Provide safe access for maintenance personnel C. Guide the counterweight D. Operate the buffer Pit ladders allow mechanics to enter and exit the pit safely for inspections, repairs, and adjustments.
- What is the purpose of a buffer stop in a traction elevator hoistway? A. Hold the counterweight B. Control rope tension C. Absorb impact if the car or counterweight travels too far D. Level the car at floors Buffers act as shock absorbers to prevent structural damage or injury in case of overtravel.
- In a hydraulic elevator, what does the term "plunger area" affect? A. Rope diameter B. Motor speed C. Car speed and lifting capacity D. Door operation The plunger’s cross-sectional area determines the hydraulic force applied, affecting both speed and lifting capacity.
- Which device prevents elevator doors from opening when the car is not present? A. Governor B. Door interlock
C. Buffer D. Car sling Door interlocks ensure doors remain locked unless the elevator car is at the corresponding floor, preventing falls.
- What is the main advantage of using machine-room-less (MRL) elevators? A. Higher speed B. No separate machine room required C. Lower capacity D. Simplified control panels MRL elevators save building space and reduce construction costs by integrating the motor and controller into the hoistway.
- Which inspection is required after major modifications to an elevator? A. Daily check B. Weekly inspection C. Monthly maintenance D. Full code compliance inspection Any major modification requires a full inspection to ensure the elevator meets ASME A17.1 safety and operational standards.
- What is the purpose of a door restrictor in freight elevators? A. Increase speed B. Prevent doors from opening between floors C. Maintain rope tension D. Control motor acceleration Door restrictors prevent unsafe opening of doors, especially in freight elevators where misalignment could cause accidents.
- Which component converts rotary motion to linear motion in hydraulic elevators? A. Sheave B. Governor C. Hydraulic cylinder D. Counterweight The hydraulic cylinder moves the car vertically by converting fluid pressure into linear displacement.
D. Measure rope tension The car operating panel is the interface for passenger commands, including floor selection, alarm, and emergency stop.
- Which of the following must be installed in all passenger elevators to ensure emergency communication? A. Fire alarm pull station B. Security camera C. Two-way communication device D. Phase converter A two-way communication system is required by code to allow passengers to contact emergency services if trapped.
- What is the primary cause of rope wear in traction elevators? A. Motor voltage B. Door operation C. Friction against sheaves and guide shoes D. Buffer compression Ropes wear due to constant contact with sheave grooves and guide shoes, requiring periodic inspection and replacement.
- Which type of elevator is most affected by temperature changes in the pit? A. Traction B. Hydraulic C. Machine-room-less D. Roped traction Hydraulic elevators use fluid that can expand or contract with temperature, affecting pressure and speed.
- Which safety device is required in both traction and hydraulic elevators? A. Roped governor B. Machine brake C. Overspeed protection or safety gear D. Hydraulic accumulator All elevators must include devices to prevent uncontrolled motion, ensuring passenger safety.
- What is the typical voltage for a commercial elevator motor? A. 120 V AC B. 208 V AC C. 480 V AC three-phase D. 600 V DC Commercial elevators commonly use 480 V three-phase motors for efficient operation of high-capacity systems.
- What is the primary consideration when replacing an elevator motor? A. Rope length B. Car width C. Motor horsepower and speed rating D. Door interlock type Replacement motors must match the original specifications to maintain rated load, speed, and system safety.
- Which device protects a traction elevator from excessive lateral movement? A. Governor B. Counterweight brake C. Guide rails and shoes D. Car sling Guide rails stabilize the car laterally, preventing sway and ensuring smooth vertical travel.
- Which factor affects the travel time of an elevator the most? A. Door color B. Rope lubrication C. Acceleration and deceleration rates D. Pit depth Travel time depends primarily on how quickly the elevator accelerates and decelerates between floors while maintaining passenger comfort.
- What is the main advantage of using synthetic ropes in some elevators? A. Lower cost B. Reduced weight and improved flexibility
A. 0.25 inch B. 0.5 inch C. As specified by manufacturer for proper traction D. 1 inch Proper rope spacing is critical for maintaining traction and preventing rope slippage; manufacturer specifications must be followed.
- Which device allows an elevator car to move in inspection mode? A. Governor B. Car top inspection station C. Door interlock D. Counterweight brake The car top inspection station enables maintenance personnel to operate the elevator at reduced speed for inspection and testing safely.
- What is the primary purpose of a phase I fire service recall? A. Open doors at all floors B. Activate emergency lights C. Return elevators to a designated floor during fire alarm D. Shut down motors Phase I recall ensures elevators do not transport passengers to floors where a fire is active, prioritizing fire safety.
- How is elevator speed typically controlled in a modern traction system? A. Pump size B. Buffer compression C. Variable-frequency drive (VFD) and control algorithm D. Rope tension VFDs adjust motor speed in real time to control acceleration, deceleration, and travel velocity.
- What is the purpose of a door edge sensor? A. Open doors faster B. Signal motor start C. Prevent door closure if an object is detected
D. Measure car speed Door edge sensors detect obstructions and automatically reverse door movement to prevent injury.
- Which component reduces noise and vibration in traction elevators? A. Governor B. Buffer C. Guide shoe or roller guides D. Counterweight brake Guide shoes and roller guides dampen lateral movement, minimizing noise and vibrations for smoother operation.
- How often must elevator hoist ropes be replaced under normal usage? A. Every 3 years B. When worn or damaged as identified by inspection C. Annually D. Every 10 years Rope replacement is based on wear, broken strands, or corrosion, as determined during regular inspections.
- What is the minimum pit depth for a direct-acting hydraulic elevator? A. 18 inches B. 24 inches C. 42 inches D. 60 inches Direct-acting hydraulic elevators require sufficient pit depth to accommodate the plunger and ensure proper buffer operation.
- Which type of safety gear is commonly used for traction elevators? A. Hydraulic clamp B. Pneumatic brake C. Wedge-type safety gear D. Electric brake Wedge-type safety gears engage the guide rails to stop the car during overspeed or free-fall conditions.
