Download Hawaii C16 Elevator Contractor Exam and more Exams Technology in PDF only on Docsity!
Question 1. According to the NEC, what is the required minimum clearance in front of electrical panels used in elevator control rooms? A) 24 inches B) 36 inches C) 48 inches D) 60 inches Answer: B Explanation: The National Electrical Code requires a minimum clearance of 36 inches in front of electrical panels to ensure safe operation and maintenance access. Question 2. Which type of motor is most commonly used in modern traction elevator systems? A) Synchronous motor
B) Split-phase AC motor C) DC shunt motor D) AC induction motor Answer: D Explanation: AC induction motors are commonly used in modern traction elevators due to their efficiency and compatibility with variable frequency drives. Question 3. In a typical elevator logic sequence, which component initiates the movement of the elevator car to a selected floor? A) Door lock relay B) Call relay C) Governor switch D) Pit switch
Question 5. What is the main function of a traction sheave in an elevator system? A) To guide the counterweight B) To change the direction of the hoist ropes C) To transmit motion from the motor to the ropes D) To stop the elevator car Answer: C Explanation: The traction sheave transmits the motor's motion to the hoist ropes, moving the elevator car. Question 6. In a hydraulic elevator, which component is responsible for moving the elevator car vertically? A) Counterweight B) Governor
C) Pump and piston D) Traction sheave Answer: C Explanation: Hydraulic elevators use a pump to move hydraulic fluid into a piston, raising and lowering the car. Question 7. What is the purpose of a governor in a traction elevator? A) To control door operation B) To regulate car speed and activate the safety brake if overspeed is detected C) To monitor car position D) To provide lighting Answer: B
Question 9. According to ASME A17.1, what is the minimum required pit depth for a typical passenger elevator? A) 12 inches B) 24 inches C) 48 inches D) 60 inches Answer: C Explanation: The minimum pit depth is generally 48 inches to ensure space for the buffer and provide required clearances. Question 10. What is the main function of counterweights in a traction elevator system? A) To add weight to the car B) To balance the weight of the car and reduce motor load
C) To provide emergency braking D) To regulate door speed Answer: B Explanation: Counterweights balance the car's weight, reducing the load on the motor and improving system efficiency. Question 11. What must be installed in the hoistway pit to protect maintenance personnel, according to code? A) Emergency stop switch B) Light switch C) Buffer D) Sump pump Answer: A
Question 13. When installing guide rails for an elevator, which is the most important factor to verify? A) Color of the rails B) Electrical insulation C) Alignment and plumb D) Surface finish Answer: C Explanation: Guide rails must be perfectly aligned and plumb to ensure smooth and safe car travel. Question 14. What type of cable is used for the traveling cable between the car and controller? A) Coaxial cable B) Armored cable
C) Flexible multi-conductor cable D) Fiber optic cable Answer: C Explanation: A flexible multi-conductor cable is used as the traveling cable to accommodate elevator movement. Question 15. How often must routine maintenance be performed on elevator safety devices, according to ASME A17.1? A) Monthly B) Quarterly C) Annually D) Every 5 years Answer: A
Question 17. What is the minimum illumination required in an elevator machine room, according to the NEC? A) 5 foot-candles B) 10 foot-candles C) 19 foot-candles D) 30 foot-candles Answer: B Explanation: The NEC requires a minimum of 10 foot-candles for proper illumination in elevator machine rooms. Question 18. Which code addresses the safety standards for existing elevators and escalators? A) ASME A17. B) ASME A17.
C) IBC
D) NEC
Answer: B Explanation: ASME A17.3 covers safety codes for existing elevators and escalators. Question 19. What is the primary purpose of a buffer in an elevator system? A) To slow down the car during normal operation B) To absorb impact if the car travels past the lowest landing C) To regulate speed D) To provide extra support Answer: B
A) Dirty tracks and rollers B) Low oil pressure C) Overloaded counterweight D) Faulty traveling cable Answer: A Explanation: Accumulation of dirt on tracks and rollers can prevent doors from opening/closing smoothly. Question 22. In a VVVF drive elevator, what does the drive primarily control? A) Lighting B) Speed and torque of the motor C) Door operation
D) Brake application Answer: B Explanation: VVVF (variable voltage, variable frequency) drives control the speed and torque of the elevator motor. Question 23. According to OSHA, what is the maximum allowable voltage for portable lighting in elevator pits? A) 120 volts B) 240 volts C) 60 volts D) 30 volts Answer: D Explanation: OSHA requires portable lighting in confined spaces like pits to not exceed 30 volts to prevent shock hazards.
B) To disconnect power from the controller and machine C) To disconnect the emergency phone D) To disconnect the pit light Answer: B Explanation: The main line disconnect switch isolates electrical power from elevator equipment for maintenance or emergencies. Question 26. What is the minimum clearance required between the elevator car top and the hoistway overhead for maintenance access? A) 12 inches B) 24 inches C) 36 inches D) 48 inches
Answer: C Explanation: Codes typically require at least 36 inches of clearance for safe access to the car top. Question 27. In elevator installation, what is the purpose of fishplates? A) To support the car frame B) To join and align guide rails C) To anchor the counterweight D) To secure the traveling cable Answer: B Explanation: Fishplates are used to join and align guide rails during installation.
