Download NV C7 Elevation Conveyance Exam Actual Test Questions and Correct Answers With Rationales and more Exams Electromechanical Systems in PDF only on Docsity!
NV C7 Elevation Conveyance Exam Actual Test Questions and
Correct Answers With Rationales LATEST THIS YEAR
Summarized Exam Coverage – NV C7 Elevation Conveyance Nevada elevator safety laws (NRS 455B, NAC 455B), ASME A17.1/CSA B44 code (elevators, escalators, moving walks, dumbwaiters, lifts), inspection and testing requirements, hydraulic elevators (direct and indirect plunger), traction elevators (geared and gearless), machine room and machine-room-less (MRL) systems, controller operation (AC and VVVF), door and gate operation, car and hoistway components, emergency systems (fire recall, emergency lighting, alarm bell, communication), escalator and moving walk components, maintenance records, alteration and repair requirements, safety devices (overspeed governor, buffers, safeties, door interlocks), load testing, working load limits, and NICET or QEI certification pathways.
1. A Nevada C7 contractor installs a hydraulic elevator with a direct plunger. The plunger extends below the car floor. What code section requires a sheave or deflector if the plunger is over a certain height? A) ASME A17.1 3. B) ASME A17.1 3.
C) ASME A17.1 3.
D) ASME A17.1 5.
Answer: A – Section 3.8 requires deflector sheaves for long-stroke plungers to prevent buckling or misalignment.
2. A new traction elevator in a Las Vegas high-rise must be tested before final inspection. Which test measures the operation of the overspeed governor? A) Full load brake test B) Governor tripping test C) Buffer compression test D) Door reopening test Answer: B – Governor tripping test verifies that the governor activates the car safeties at or below the overspeed setpoint. 3. A C7 licensed contractor is replacing an escalator handrail. The handrail must maintain tension and tracking. What device is required to prevent slack? A) Drive chain tensioner
A) Disable the restrictor B) Adjust or replace the restrictor C) Increase door closing force D) Notify the building owner only Answer: B – Door restrictor must prevent door opening when the car is outside the unlocking zone; immediate repair is required.
6. A traction elevator’s brake fails to set when power is lost. Which component is most likely defective? A) Brake coil B) Brake springs C) Controller logic board D) Door interlock Answer: B – Elevator brakes are spring-set, electrically released. If springs fail or are weak, the brake may not engage. 7. A Nevada C7 contractor performs an alteration on a hydraulic elevator. After completion, what must be done before placing the elevator back in service?
A) Full load test B) Governor recalibration C) Door pressure test D) Visual inspection only Answer: A – ASME A17.1 requires a full load test (125% of rated load) after any alteration affecting safety components.
8. An escalator step chain breaks. Which safety device stops the escalator immediately? A) Step chain break switch B) Handrail speed sensor C) Comb plate impact switch D) Step missing device Answer: A – Step chain break switch monitors chain continuity; upon break, it triggers an emergency stop. 9. A C7 mechanic is called to an elevator that stops between floors. The car safeties have engaged. What caused the safeties to activate?
A) Pump motor B) Control valve C) Plunger packing D) Tank strainer Answer: B – Low oil can cause air ingestion, leading to erratic valve operation and jerky movement.
12. An escalator’s comb plate switch activates during normal operation. What is the most likely cause? A) Broken step B) Foreign object between step and comb C) Handrail speed mismatch D) Step chain wear Answer: B – Comb plate impact switch is designed to stop the escalator if an object gets caught between step and comb. 13. Nevada requires that all C7 licensed contractors maintain proof of workers’ compensation insurance. Where must this proof be available? A) Only at the main office
B) On each job site where elevator work is performed C) Filed with the city clerk D) No proof required Answer: B – Nevada Administrative Code requires proof of insurance available at each job site.
14. A traction elevator’s governor rope has visible broken wires. The rope must be replaced if it has more than: A) 2 broken wires in one lay B) 4 broken wires in one lay C) 6 broken wires in one lay D) 10% of total wires Answer: B – ASME A17.1 2.8.5 specifies replacement when 4 or more broken wires appear in one lay. 15. A mechanic installs an elevator with an automatic rescue device. This device is designed to: A) Reset the door interlock B) Move the car to the nearest landing during power failure
C) New governor calibration D) Only visual inspection Answer: A – Safeties should not set at 125% load; if they do, they must be reset and the elevator re-tested.
18. An escalator handrail speed sensor detects a 20% speed mismatch relative to step movement. The escalator should: A) Continue operation but trigger alarm B) Immediately stop C) Reduce speed automatically D) Increase handrail tension Answer: B – ASME A17.1 requires escalator stop when handrail speed differs from step speed by more than 15%. 19. A C7 contractor replaces the controller on an existing elevator. What code requirements apply to the new controller? A) The controller must meet current ASME A17.1 edition
B) The controller can be any used unit C) No code applies because it is a repair D) Only local building code applies Answer: A – Any new component installed must meet the current ASME A17.1 code edition for that component.
20. The pit of a hydraulic elevator has 6 inches of standing water. Before performing any work in the pit, the mechanic must: A) Pump out water and verify no electrical hazards B) Enter immediately to find the leak C) Use a metal ladder to enter D) Only work from outside the pit Answer: A – Standing water creates electrical and slip hazards; pump out, de-energize, and verify safe conditions. 21. An elevator’s door reopening device (photoelectric or pressure) fails to reverse when a 1-inch obstruction is placed in the doorway. What action is required?
C) Reduce step wear D) Lubricate step chains Answer: B – Yellow demarcation line on leading and trailing edges warns passengers of step boundaries.
24. A traction elevator’s car is leveling poorly at landings. The mechanic should first check: A) Brake lining thickness B) Door interlock timing C) Position transducer or encoder D) Governor rope tension Answer: C – Leveling depends on accurate car position feedback from encoder or resolver. 25. During an annual inspection, the elevator’s buffer is found to be corroded. The mechanic must: A) Paint the buffer B) Replace or repair the buffer C) Increase buffer oil level D) No action, corrosion is allowed Answer: B – Corrosion can affect buffer performance; must be repaired or replaced.
26. A hydraulic elevator’s relief valve is set too high. This will cause: A) Excessive car speed B) Over-pressurization of system components C) Slow ascent D) Oil overheating only Answer: B – Relief valve protects system from overpressure; incorrect setting risks rupturing hoses or cylinders. 27. An escalator has a missing step. The step-missing device should: A) Sound an alarm but keep running B) Stop the escalator immediately C) Bypass the missing step D) Increase step speed Answer: B – Missing step device stops the escalator to prevent passenger injury. 28. A C7 contractor is called to an elevator that will not move with doors closed and interlock made. The mechanic checks the safety chain. The first component to test is:
C) 1.5 inches D) 2 inches Answer: B – ASME A17.1 allows leveling zone of ±1 inch for passenger elevators.
31. A hydraulic elevator’s tank breather is clogged. This can cause: A) Overheating of oil B) Tank vacuum or pressurization, leading to erratic operation C) Low oil level D) Faster ascent Answer: B – Clogged breather prevents pressure equalization, causing pump cavitation or tank bulging. 32. An escalator handrail has a crack that exposes the reinforcement. The mechanic must: A) Tape the crack B) Replace the handrail C) Reduce escalator speed D) Monitor the crack weekly Answer: B – Crack exposing reinforcement compromises safety and must be replaced.
33. Nevada requires that a C7 licensed contractor display the license number: A) Only on contracts B) On all advertising and vehicles C) Only on bid documents D) Not required Answer: B – NAC 455B requires license number on all advertisements, vehicles, and correspondence. 34. A traction elevator’s brake lining is 50% worn. The code requires replacement when: A) Any wear is visible B) Wear reaches the rivets or backing C) Wear exceeds 25% D) Brake makes noise Answer: B – Brake linings must be replaced before wear exposes rivets or backing plate. 35. A C7 contractor performs an alteration on an escalator’s drive system. After completion, a full load test is required using: A) Sandbags placed on every step
Answer: B – Internal leakage in down valve allows oil to bypass, causing car to drift down.
38. An escalator’s step chain stretches beyond allowable limits. The mechanic should: A) Add chain lubricant B) Adjust the chain tensioner or replace chain C) Remove one link D) Increase escalator speed Answer: B – Stretched chain must be adjusted or replaced; removing links may not address elongation. 39. A C7 contractor is installing a new elevator. The contractor must obtain a permit from: A) The Nevada State Contractors Board B) The local building department or authority having jurisdiction C) The elevator manufacturer D) The property owner Answer: B – Installation permit is issued by the local building department (AHJ). 40. An elevator’s car lighting fails. The mechanic finds that the emergency lighting battery is dead. According to code, emergency lighting must illuminate for:
A) 15 minutes B) 30 minutes C) 1 hour D) 4 hours Answer: B – ASME A17.1 requires emergency lighting for at least 30 minutes.
41. During a full load test, a hydraulic elevator’s relief valve opens at 30% above normal operating pressure. The correct setting is: A) 10% above normal pressure B) 25% above normal pressure C) 40% above normal pressure D) 50% above normal pressure Answer: B – Relief valve typically set at 25% above maximum working pressure. 42. A mechanic finds that the escalator’s brake does not engage within the required stopping distance. The brake must stop the escalator within: A) 1 foot
