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NEIEP Mechanic Exam practice questions

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Question 1Elevator and Escalator Installation, Assembly, and Replacement

When installing a hydraulic elevator, what is the primary purpose of the oil return (muffler) line connected between the valve and the tank?

  1. To return oil to the tank during the down direction and dampen pressure pulsations Correct answer.
  2. To circulate cooling oil through the power unit heat exchanger
  3. To provide a bypass path for the relief valve during overload
  4. To supply pressurized oil to the jack during the up direction

Explanation

The return line carries oil back to the reservoir when the car descends and includes muffling to reduce hydraulic noise and pulsation. It is not a pressure supply path; that is the function of the high-pressure line to the jack.

Question 2Elevator and Escalator Installation, Assembly, and Replacement

During installation of a geared traction machine, the machine must be set so the hoist ropes leave the sheave vertically. Which adjustment accomplishes this?

  1. Adjusting the brake spring compression
  2. Increasing the counterweight to tension the ropes
  3. Shimming the machine base to level the sheave face relative to the plumb rope lines Correct answer.
  4. Changing the governor rope length

Explanation

Rope lead is controlled by shimming and positioning the machine so the sheave grooves align with the vertical drop of the ropes. Misalignment causes uneven groove wear and rope vibration.

Question 3Elevator and Escalator Installation, Assembly, and Replacement

What is the purpose of the counterweight guide rails being aligned to the same plumb line as the car guide rails during installation?

  1. To keep the counterweight frame traveling smoothly and maintain proper rope spacing Correct answer.
  2. To allow the counterweight to share the car safety circuit
  3. To increase the rated load of the elevator
  4. To reduce the required pit depth

Explanation

Counterweight rails must be plumb and aligned so the counterweight frame runs without binding and the hoist ropes maintain correct spacing to the sheave. Misalignment causes rubbing, noise, and accelerated guide shoe wear.

Question 4Elevator and Escalator Installation, Assembly, and Replacement

When erecting scaffold (false car) in a hoistway for installation work, what is the primary structural requirement?

  1. It must be made entirely of aluminum
  2. It must be supported only from the pit floor
  3. It must be designed and rated to support the intended loads with planking secured against movement Correct answer.
  4. It must be removed before any rail is set

Explanation

Working platforms in hoistways must be engineered for the loads placed on them, with planks secured so they cannot shift or tip. This protects installers from falls and collapse during rail and machine work.

Question 5Elevator and Escalator Installation, Assembly, and Replacement

What is the standard function of the oil buffer installed in the pit for a high-speed elevator?

  1. To decelerate the car or counterweight smoothly if it overtravels into the pit Correct answer.
  2. To lubricate the guide rails
  3. To tension the compensation ropes
  4. To hold the car level at a floor

Explanation

Oil buffers absorb the kinetic energy of a car or counterweight that travels beyond the normal terminal landing, decelerating it to a stop. They are required above certain rated speeds where spring buffers are not adequate.

Question 6Elevator and Escalator Installation, Assembly, and Replacement

When installing a machine-room-less (MRL) elevator, where is the traction machine typically mounted?

  1. On guide rails or a machine beam within the hoistway Correct answer.
  2. In the pit on the buffer pedestal
  3. On the car top
  4. On a concrete pedestal in a separate penthouse

Explanation

MRL designs mount the compact traction machine on the guide rails or a structural beam inside the hoistway, eliminating the traditional machine room. This affects installation sequencing because machine placement occurs during hoistway work.

Question 7Elevator and Escalator Installation, Assembly, and Replacement

What is the purpose of the compensation rope or chain in a tall traction elevator installation?

  1. To provide emergency braking
  2. To drive the governor
  3. To offset the weight of the hoist ropes as the car changes position in the hoistway Correct answer.
  4. To carry the traveling cable

Explanation

Compensation ropes or chains hang below the car and counterweight to balance the changing weight of the hoist ropes, keeping traction and motor load more constant over travel. They improve ride and reduce motor torque variation.

Question 8Elevator and Escalator Installation, Assembly, and Replacement

Before pouring the pit floor or setting the buffer pedestals, what must be confirmed about the pit dimensions?

  1. That the sump pump is energized
  2. That the pit is painted
  3. That the counterweight is installed
  4. That pit depth, width, and buffer locations match the approved layout drawing Correct answer.

Explanation

Pit depth, plan dimensions, and buffer pedestal locations must match the approved layout before concrete is placed, because correcting errors afterward is costly. This verification is a key early installation checkpoint.

Question 9Elevator and Escalator Installation, Assembly, and Replacement

A mechanic is setting car guide rails and finds that the rail bracket spacing exceeds the maximum allowed by the layout. What is the appropriate action?

  1. Increase rail shim thickness to compensate
  2. Increase the governor rope tension
  3. Reduce the counterweight to lower loads
  4. Add or relocate brackets to meet the specified maximum spacing before final alignment Correct answer.

Explanation

Rail bracket spacing must not exceed the engineered maximum, since brackets transfer guide forces to the building structure. Adding or relocating brackets restores the intended support before alignment is finalized.

Question 10Elevator and Escalator Installation, Assembly, and Replacement

During installation of a hydraulic jack, the plunger must be plumb within tolerance. Which consequence most directly results from an out-of-plumb jack?

  1. Increased oil temperature only
  2. Reduced buffer stroke
  3. Faster up travel speed
  4. Premature packing and guide wear from side loading on the plunger Correct answer.

Explanation

An out-of-plumb jack introduces side loads on the plunger and packing, causing accelerated wear and leakage. Plumbness is verified during installation to avoid these mechanical problems.

Question 11Elevator and Escalator Installation, Assembly, and Replacement

When installing the governor, the mechanic must ensure the governor rope aligns with the car safety mechanism. What is the primary risk of misalignment?

  1. Increased door closing force
  2. Reduced motor current draw
  3. Improper or delayed safety actuation when the car overspeeds Correct answer.
  4. Shortened traveling cable life

Explanation

The governor rope must pull the safety linkage squarely so the safeties set promptly at the trip speed. Misalignment can bind the linkage and delay or prevent proper safety engagement.

Question 12Elevator and Escalator Installation, Assembly, and Replacement

A crew is installing a two-speed AC geared machine and must verify brake setting before running the car. Which check confirms the brake holds the rated load?

  1. Verify the door operator timing
  2. Apply the brake and confirm it holds the car with rated load without slipping Correct answer.
  3. Measure the sheave groove depth
  4. Check the governor trip speed

Explanation

The machine brake must be capable of holding the rated load when applied, which is verified by a load-holding test before normal operation. This confirms braking torque is adequate.

Question 13Elevator and Escalator Installation, Assembly, and Replacement

During installation of car sling and platform, why must the sling be squared and the platform leveled before the cab is attached?

  1. To ensure the cab sits true and guide shoes align properly with the rails Correct answer.
  2. To shorten the traveling cable
  3. To increase the car rated capacity
  4. To reduce the counterweight weight

Explanation

A squared sling and level platform ensure the cab is true and the guide shoes track the rails correctly, preventing binding and uneven wear. This alignment is completed before cab assembly.

Question 14Elevator and Escalator Installation, Assembly, and Replacement

When installing door operators, the clutch must be set so the car door and hoistway door engage correctly. What is the purpose of this adjustment?

  1. To control the hall lantern
  2. To allow the car door to open the hoistway door while permitting manual hoistway door operation Correct answer.
  3. To set the door close speed
  4. To lock the car door closed during travel

Explanation

The door clutch couples the car door to the hoistway door so the car door operates the landing door, while still allowing the landing door to be opened manually from the landing side. Correct adjustment prevents binding and improper unlocking.

Question 15Elevator and Escalator Installation, Assembly, and Replacement

A crew is installing a roped hydraulic elevator and must route the suspension ropes over the sheave. Which practice ensures proper rope life?

  1. Overtensioning the ropes to eliminate all stretch
  2. Routing ropes around sharp structural edges
  3. Using mismatched rope diameters
  4. Maintaining correct rope tension and alignment with the sheave grooves Correct answer.

Explanation

Ropes should be matched in diameter, properly tensioned, and aligned with the sheave grooves to distribute load evenly and avoid wear. Sharp edges and mismatched diameters cause rapid rope damage.

Question 16Elevator and Escalator Installation, Assembly, and Replacement

When installing an escalator, the truss must be set on the building supports with proper bearing. Why is shimming at the support points critical?

  1. To reduce the number of steps
  2. To change the balustrade color
  3. To distribute loads evenly and prevent truss distortion that affects step and handrail tracking Correct answer.
  4. To increase the escalator speed

Explanation

Proper shimming at support points ensures the truss bears evenly, preventing distortion that would misalign steps, tracks, and handrails. Uneven bearing can cause binding and premature wear.

Question 17Elevator and Escalator Installation, Assembly, and Replacement

During escalator assembly, the step chain must be tensioned correctly. What is the result of excessive step chain tension?

  1. Reduced handrail speed
  2. Increased wear on the chain, sprockets, and bearings Correct answer.
  3. Improved step leveling
  4. Lower motor current

Explanation

Over-tensioning the step chain loads the chain, sprockets, and bearings beyond design, accelerating wear and possibly causing failure. Tension is set to the manufacturer's specification.

Question 18Elevator and Escalator Installation, Assembly, and Replacement

When installing a new elevator, the traveling cable must be supported so it flexes properly. Which installation practice is correct?

  1. Tie the cable tightly to the car frame at short intervals
  2. Support the cable with a strain-relief clamp and allow a natural loop that clears the pit floor Correct answer.
  3. Coil excess cable on the car top
  4. Route the cable through the guide rail brackets

Explanation

The traveling cable needs strain relief at the car and a free-hanging loop that clears the pit so it can flex through the full travel without abrasion. Tight tying or coiling restricts flexing and shortens cable life.

Question 19Elevator and Escalator Installation, Assembly, and Replacement

A mechanic is aligning hoistway doors and finds that one landing door lock does not make proper engagement. Why must this be corrected before placing the elevator in service?

  1. It alters the governor trip point
  2. The interlock must prevent car movement unless the door is locked, so improper engagement is a safety hazard Correct answer.
  3. It affects the hall lantern brightness
  4. It changes the car rated speed

Explanation

Door interlocks are safety devices that prevent car movement unless all hoistway doors are closed and locked. Improper engagement defeats this protection and must be corrected before service.

Question 20Elevator and Escalator Installation, Assembly, and Replacement

When installing a machine beam for a traction elevator, the beam must be set level and anchored to the building. What is the primary purpose of leveling the beam?

  1. To allow the car to travel faster
  2. To keep the machine and sheave plumb so rope leads remain vertical Correct answer.
  3. To reduce the pit depth requirement
  4. To increase the counterweight capacity

Explanation

A level machine beam keeps the machine and sheave properly oriented so the hoist ropes drop vertically to the car and counterweight. This prevents uneven groove wear and rope vibration.

Question 21Elevator and Escalator Installation, Assembly, and Replacement

During installation of a counterweight, the mechanic must verify the counterweight guide shoes are properly fitted. What is the consequence of excessive shoe clearance?

  1. The ropes will stretch less
  2. The governor will trip sooner
  3. The car will level more accurately
  4. The counterweight may rattle and wear rails unevenly as it travels Correct answer.

Explanation

Guide shoe clearance must be set to specification; excessive clearance allows the counterweight to rattle and bear unevenly on the rails, causing noise and wear. Proper fit keeps travel smooth.

Question 22Elevator and Escalator Installation, Assembly, and Replacement

A crew must replace an existing hydraulic power unit. Which step best ensures the new unit matches system requirements?

  1. Choose the largest available tank
  2. Disconnect the muffler line permanently
  3. Verify the new unit's rated pressure and flow match the jack and valve specifications Correct answer.
  4. Reuse the old relief valve setting without checking

Explanation

The replacement power unit must match the jack and valve in rated pressure and flow so the system performs to design and safety limits. Mismatched components can cause overpressure or inadequate speed.

Question 23Elevator and Escalator Installation, Assembly, and Replacement

When replacing guide rails in an existing hoistway, why must the new rails be checked against the original plumb line and bracket elevations?

  1. To preserve guide shoe alignment and maintain safety and ride quality throughout travel Correct answer.
  2. To increase the car rated load
  3. To reduce the counterweight mass
  4. To change the door operator type

Explanation

Replacement rails must follow the established plumb line and bracket elevations so the car and counterweight guide shoes track correctly over the full travel. Deviations cause binding, noise, and safety concerns.

Question 24Elevator and Escalator Installation, Assembly, and Replacement

An installer is setting the escalator drive machine and must align the drive sprocket with the step chain. What is the primary effect of misalignment?

  1. Reduced step width
  2. Lower balustrade height
  3. Increased handrail speed
  4. Uneven chain loading and accelerated sprocket and chain wear Correct answer.

Explanation

The drive sprocket must align with the step chain so load is distributed evenly across the chain and sprocket teeth. Misalignment concentrates load, causing rapid wear and possible chain tracking problems.

Question 25Elevator and Escalator Installation, Assembly, and Replacement

During installation of a new elevator, the mechanic must confirm the car safety device will engage the rails properly. Which condition is essential for correct safety operation?

  1. The governor is disconnected
  2. The safety blocks and rail surfaces are clean and the clearances are set to specification Correct answer.
  3. The car is loaded to rated capacity
  4. The buffer is removed

Explanation

Safeties depend on clean rail surfaces and specified clearances between the safety blocks and rails to grip properly when tripped. Contamination or incorrect clearance can prevent engagement.

Question 26Elevator and Escalator Installation, Assembly, and Replacement

When installing an elevator, what is the primary purpose of the guide rails?

  1. To carry the entire weight of the car and counterweight
  2. To serve as the primary electrical ground path
  3. To provide a vertical track that keeps the car and counterweight aligned during travel Correct answer.
  4. To support the machine beam and sheaves

Explanation

Guide rails are installed vertically in the hoistway to constrain the car and counterweight to a straight path, minimizing sway and ensuring safety devices can engage. They do not carry the suspended load; that is the role of ropes or hydraulic systems.

Question 27Elevator and Escalator Installation, Assembly, and Replacement

During escalator installation, what is the function of the step chain?

  1. To drive the handrail at the same speed as the steps
  2. To connect the steps and move them in a continuous loop Correct answer.
  3. To provide emergency braking
  4. To support the weight of passengers on the steps

Explanation

The step chain is an endless chain that links the steps together and runs on sprockets driven by the escalator machine, moving the steps in a continuous loop. Passenger weight is carried by the step wheels on the tracks, not by the chain.

Question 28Elevator and Escalator Installation, Assembly, and Replacement

When installing a traction elevator, what is the purpose of the counterweight?

  1. To increase the lifting capacity of the machine
  2. To balance the weight of the car and a portion of the rated load, reducing motor effort Correct answer.
  3. To guide the car along the rails
  4. To provide emergency braking in case of power failure

Explanation

The counterweight is sized to approximately balance the car weight plus about 40-50% of the rated load, which reduces the torque required from the machine and improves energy efficiency. It does not increase capacity or provide braking.

Question 29Elevator and Escalator Installation, Assembly, and Replacement

What is the primary function of the governor in an elevator installation?

  1. To regulate the speed of the car during normal operation
  2. To detect overspeed and trigger the car safety device Correct answer.
  3. To control the door opening and closing speed
  4. To monitor the load in the car

Explanation

The governor is a centrifugal device that senses overspeed; if the car exceeds a set speed, it grips the governor rope, which in turn activates the car safety mechanism to stop the car. Normal speed control is handled by the machine control system.

Question 30Elevator and Escalator Installation, Assembly, and Replacement

When installing a hydraulic elevator, what is the purpose of the oil return line?

  1. To cool the hydraulic fluid
  2. To allow oil to flow back to the tank when the car descends Correct answer.
  3. To supply oil to the jack during ascent
  4. To filter impurities from the oil

Explanation

In a hydraulic elevator, the oil return line carries fluid from the jack back to the tank when the down valve is opened, allowing the car to descend under gravity. The supply line delivers pressurized oil for ascent.

Question 31Elevator and Escalator Installation, Assembly, and Replacement

During escalator installation, what is the purpose of the skirt guard?

  1. To provide a handhold for passengers
  2. To support the weight of the steps
  3. To prevent passengers from stepping off the side of the step Correct answer.
  4. To cover the step chain

Explanation

The skirt guard is the smooth panel along the sides of the steps that minimizes the gap between the step and the side panel, helping prevent objects or feet from getting caught. It is not a handhold or structural support.

Question 32Elevator and Escalator Installation, Assembly, and Replacement

When installing elevator suspension ropes, what is the recommended practice for equalizing rope tension?

  1. Tighten all ropes equally without measurement
  2. Use a tension gauge and adjust the rope shackles or springs until tensions are within tolerance Correct answer.
  3. Allow the ropes to equalize naturally after a few runs
  4. Adjust each rope to the same visual deflection by hand

Explanation

Rope tension should be measured with a tension gauge and adjusted using the individual rope shackles or tension springs so that each rope carries its share of the load. Unequal tension can cause rapid rope wear and vibration.

Question 33Elevator and Escalator Installation, Assembly, and Replacement

What is the purpose of the pit ladder in an elevator installation?

  1. To support the buffer stands
  2. To guide the counterweight
  3. To provide access to the pit for maintenance and inspection Correct answer.
  4. To serve as a temporary support during installation

Explanation

The pit ladder is a permanent fixture that provides safe access for mechanics to enter and exit the pit for maintenance and inspection. It is not a structural support or guide.

Question 34Elevator and Escalator Installation, Assembly, and Replacement

When installing a machine-room-less (MRL) elevator, the traction machine is mounted to the guide rails. What is a critical factor to ensure proper operation?

  1. The machine must be oriented vertically
  2. The guide rails must be reinforced to carry the machine weight and torque Correct answer.
  3. The machine must be mounted on rubber isolators to reduce noise
  4. The guide rails must be painted to prevent corrosion

Explanation

In MRL installations, the machine is often mounted directly on the guide rails, so the rails must be designed and installed to withstand the additional weight and dynamic forces from the machine. Proper reinforcement is essential for safety and performance.

Question 35Elevator and Escalator Installation, Assembly, and Replacement

During the installation of a hydraulic elevator, the jack is installed in the pit. What is the purpose of the PVC casing around the jack?

  1. To guide the plunger
  2. To protect the jack from corrosion and allow for movement Correct answer.
  3. To provide structural support to the jack
  4. To insulate the jack electrically

Explanation

The PVC casing (or jack sleeve) surrounds the jack to protect it from soil and moisture and to allow the jack to move slightly without direct contact with the surrounding concrete or earth. It does not provide structural support or electrical insulation.

Question 36Elevator and Escalator Installation, Assembly, and Replacement

When installing an escalator, the truss is set on the building supports. What is the purpose of the support angles or shims placed under the truss?

  1. To isolate vibration from the building
  2. To distribute the load evenly and compensate for minor structural variations Correct answer.
  3. To provide a temporary support during installation
  4. To allow for thermal expansion of the truss

Explanation

Shims or support angles are used to ensure the truss sits level and that its weight is evenly distributed on the building supports, compensating for any unevenness in the concrete. They are not primarily for thermal expansion or vibration isolation.

Question 37Elevator and Escalator Installation, Assembly, and Replacement

During the installation of an elevator door operator, what is the purpose of the door clutch?

  1. To provide a signal to the controller that the door is closed
  2. To engage the hoistway door lock and allow the car door to open the hoistway door Correct answer.
  3. To control the speed of the car door
  4. To lock the hoistway door when the car is not at the landing

Explanation

The door clutch is mounted on the car door and engages the hoistway door lock mechanism as the car door opens, allowing the car door to unlock and open the hoistway door. It does not control speed or provide locking itself.

Question 38Elevator and Escalator Installation, Assembly, and Replacement

When installing a new elevator, the traveling cable is suspended from the car. What is the recommended practice for supporting the cable to ensure proper flexing?

  1. Allow the cable to hang freely without any support
  2. Tie the cable tightly to the car frame to prevent movement
  3. Support the cable at intervals with suitable clips or supports that allow free flexing Correct answer.
  4. Support the cable only at the car end

Explanation

The traveling cable should be supported at regular intervals with clips or supports that allow it to flex without strain, preventing damage to conductors and insulation. Tight tying or lack of support can cause premature failure.

Question 39Elevator and Escalator Installation, Assembly, and Replacement

During the installation of a counterweight, the guide shoes are fitted to the guide rails. What is the correct procedure for adjusting the guide shoe clearance?

  1. Adjust the shoes to provide a slight clearance as specified by the manufacturer Correct answer.
  2. Leave the shoes loose to allow for rail irregularities
  3. Adjust the shoes to be as tight as possible against the rails
  4. Adjust the shoes to have equal clearance on all sides regardless of manufacturer specs

Explanation

Guide shoe clearance must be set according to the manufacturer's specifications, typically a small clearance to allow for rail variations while minimizing sway. Overtightening can cause binding and wear; too loose can cause excessive movement.

Question 40Elevator and Escalator Installation, Assembly, and Replacement

When replacing an existing hydraulic power unit, which step is most important to ensure the new unit matches the system requirements?

  1. Select a unit with a higher pressure rating to increase lifting capacity
  2. Ensure the new unit uses the same oil type as the old unit
  3. Verify the new unit's pressure and flow ratings match the original specifications Correct answer.
  4. Choose a unit with a larger tank to improve cooling

Explanation

The replacement power unit must match the original system's pressure and flow requirements to ensure proper operation and safety. Using a unit with different ratings can lead to malfunction or safety hazards.

Question 41Elevator and Escalator Installation, Assembly, and Replacement

When installing an escalator, the drive machine is aligned with the step chain sprocket. What is the primary purpose of this alignment?

  1. To allow for thermal expansion of the chain
  2. To ensure even load distribution on the step chain and reduce wear Correct answer.
  3. To minimize noise from the machine
  4. To facilitate lubrication of the chain

Explanation

Proper alignment of the drive sprocket with the step chain ensures that the chain runs smoothly and the load is evenly distributed across the chain links, reducing wear and preventing premature failure. Misalignment can cause uneven tension and rapid wear.

Question 42Elevator and Escalator Installation, Assembly, and Replacement

During the installation of a new elevator, the car safety device must engage the guide rails properly. What is the critical check to ensure proper engagement?

  1. Ensure the safety device is painted to prevent corrosion
  2. Verify that the safety jaws have the correct clearance to the rail as specified Correct answer.
  3. Confirm that the safety device is electrically grounded
  4. Check that the safety device is lubricated regularly

Explanation

The safety jaws must have the correct clearance to the guide rail to ensure they can grip the rail effectively when activated. Too much or too little clearance can prevent proper engagement.

Question 43Elevator and Escalator Installation, Assembly, and Replacement

When installing a machine beam for a traction elevator, the beam must be set level and anchored. What is the consequence of an unlevel machine beam?

  1. Excessive door operation noise
  2. Increased motor power consumption
  3. Reduced braking effectiveness
  4. Uneven rope tension and accelerated sheave wear Correct answer.

Explanation

An unlevel machine beam can cause the ropes to run unevenly on the sheaves, leading to unequal tension and accelerated wear of the sheave grooves and ropes. It may also affect the alignment of the machine with the hoistway.

Question 44Elevator and Escalator Installation, Assembly, and Replacement

During the replacement of guide rails in an existing hoistway, why must the new rails be checked against the original plumb line?

  1. To maintain the original building aesthetics
  2. To ensure the car and counterweight travel smoothly without binding Correct answer.
  3. To reduce installation time
  4. To comply with local electrical codes

Explanation

The new rails must be aligned with the original plumb line to maintain the correct verticality, ensuring that the car and counterweight guide shoes do not bind and that the safety devices engage properly. Deviations can cause rough operation and safety issues.

Question 45Elevator and Escalator Installation, Assembly, and Replacement

When installing a roped hydraulic elevator, the suspension ropes must be routed over the sheave. Which practice ensures proper rope life?

  1. Lubricate the ropes with heavy grease
  2. Use ropes that are slightly longer than specified
  3. Ensure the ropes are properly tensioned and aligned with the sheave grooves Correct answer.
  4. Allow the ropes to rub against the sheave guards

Explanation

Proper tensioning and alignment prevent uneven wear and ensure the ropes run smoothly in the sheave grooves. Lubrication should follow manufacturer recommendations, and ropes should not rub against guards.

Question 46Elevator and Escalator Installation, Assembly, and Replacement

During the installation of an escalator, the step chain is tensioned. What is the result of insufficient step chain tension?

  1. Chain sag and potential jumping of the sprocket teeth Correct answer.
  2. Excessive wear on the step wheels
  3. Noise from the handrail drive
  4. Increased motor current

Explanation

Insufficient tension can cause the chain to sag, leading to improper engagement with the sprocket teeth, which may result in jumping or skipping and accelerated wear. Proper tension ensures smooth operation.

Question 47Elevator and Escalator Installation, Assembly, and Replacement

When installing an elevator, the compensation rope is used in tall installations. What is the primary function of the compensation rope?

  1. To increase the lifting capacity
  2. To provide emergency braking
  3. To guide the counterweight
  4. To reduce the weight imbalance caused by the suspension ropes Correct answer.

Explanation

In tall buildings, the weight of the suspension ropes on the car side versus the counterweight side creates an imbalance. The compensation rope (or chain) hangs below the car and counterweight to offset this weight, reducing motor torque variation.

Question 48Elevator and Escalator Installation, Assembly, and Replacement

A mechanic is installing a hydraulic elevator and must set the jack plunger plumb. What is the most direct consequence of a plunger that is out of plumb beyond tolerance?

  1. Excessive noise from the power unit
  2. Premature wear of the jack packing and seals Correct answer.
  3. Reduced lifting speed
  4. Increased oil temperature

Explanation

An out-of-plumb plunger causes side loading on the jack packing and seals, leading to uneven wear and potential leaks. It can also cause binding and uneven operation.

Question 49Elevator and Escalator Installation, Assembly, and Replacement

During the installation of a geared traction machine, the brake must be adjusted. Which check confirms the brake is set correctly?

  1. Verify the brake coil voltage matches the control circuit
  2. Ensure the brake shoes clear the drum evenly when energized Correct answer.
  3. Confirm the brake springs are fully compressed when de-energized
  4. Check that the brake drum is painted

Explanation

Proper brake adjustment ensures that when the brake is energized (picked up), the shoes clear the drum evenly, preventing drag, and when de-energized, they apply evenly for stopping. Voltage match is important but not the adjustment check.

Question 50Elevator and Escalator Installation, Assembly, and Replacement

When installing an escalator, the handrail must be properly tensioned. What is the result of excessive handrail tension?

  1. Handrail slipping on the drive wheel
  2. Reduced step chain tension
  3. Increased wear on the handrail rollers and drive Correct answer.
  4. Excessive handrail speed

Explanation

Excessive handrail tension places extra load on the handrail rollers, guide tracks, and drive mechanism, leading to accelerated wear and potential motor overload. Proper tension ensures smooth operation without excessive strain.