CET Modernization & Upgrades 2 — Questions and Answers
Question 1: When modernizing an older traction elevator's control system, which component is typically upgraded first to enable compatibility with newer safety features?
- The hoisting rope
- The relay logic controller (Correct answer)
- The pit ladder
- The guide rail lubricators
Correct answer: The relay logic controller
Relay logic controllers are replaced with solid-state or microprocessor-based controls to support modern safety and diagnostic features.
Question 2: A car operating panel (COP) replacement during modernization must comply with ADA requirements. What is the maximum mounting height for the highest operable control button?
- 54 inches AFF
- 48 inches AFF (Correct answer)
- 60 inches AFF
- 42 inches AFF
Correct answer: 48 inches AFF
ADA requires the highest operable part of a control to be no more than 48 inches above the finished floor for a forward reach.
Question 3: During a hydraulic elevator modernization, the existing single-bottom jack is replaced with a PVC-lined telescopic jack. What is the primary reason for this upgrade?
- To increase travel speed
- To prevent soil and groundwater contamination from oil leaks (Correct answer)
- To reduce electrical consumption
- To allow heavier capacity
Correct answer: To prevent soil and groundwater contamination from oil leaks
PVC-lined and double-bottom jacks prevent hydraulic fluid from leaking into the ground, addressing environmental protection requirements.
Question 4: When upgrading an elevator to meet current ASME A17.1 requirements, which device must be added if the car has a collapsible gate and no automatic door?
- A door restrictor
- A car gate switch (Correct answer)
- A firefighters' service key switch
- A pit stop switch
Correct answer: A car gate switch
A car gate switch is required to prevent the elevator from operating unless the car gate is fully closed.
Question 5: A modernization project requires installing a new variable voltage variable frequency (VVVF) drive. What must be verified regarding the existing hoisting motor?
- Motor nameplate voltage matches drive output exactly
- Motor winding insulation is rated for inverter duty (NEMA MG1 Part 31) (Correct answer)
- Motor is painted the same color as before
- Motor shaft diameter matches the existing sheave bore
Correct answer: Motor winding insulation is rated for inverter duty (NEMA MG1 Part 31)
Inverter-duty motors with insulation rated per NEMA MG1 Part 31 are required because VVVF drives produce voltage spikes that can damage standard motor windings.
Question 6: Which ASME A17.1 rule governs the requirement for firefighters' emergency operation (FEO) when an elevator is modernized?
- Rule 2.27
- Rule 2.26.1 (Correct answer)
- Rule 3.26
- Rule 1.3
Correct answer: Rule 2.26.1
ASME A17.1 Rule 2.26.1 covers firefighters' emergency operation requirements, which must be added or updated during modernization.
Question 7: When replacing a drum-type elevator machine with a geared traction machine during modernization, what critical recalculation must be performed?
- Paint color selection for the machine room
- Counterweight balance and rope factor of safety (Correct answer)
- Number of floors the elevator serves
- Pit depth measurement
Correct answer: Counterweight balance and rope factor of safety
Counterweight sizing and rope factor of safety must be recalculated to ensure safe operation with the new traction machine configuration.
CET Modernization & Upgrades 2
When modernizing an older traction elevator's control system, which component is typically upgraded first to enable compatibility with newer safety features?