During the planning phase of a traction elevator installation, which drawings are the primary source for verifying required clearances between the cab and hoistway walls?
Planning And Estimating
Question · Easy
When scheduling an escalator installation, which activity typically consumes the most building crane time?
Question · Medium
When ordering suspension ropes for a 2:1 roped traction elevator, the estimator must account for the roping factor. Compared to a 1:1 roping at the same rated car speed, the rope velocity in a 2:1 system is:
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An electric traction elevator has an empty car weight of 4,500 lb and a rated capacity of 3,000 lb. If the counterweight is balanced at 45% of rated capacity, what is the required counterweight weight?
Question · Hard
Before beginning demolition of an existing elevator in an occupied building, the C-11 contractor's job plan must first include which step?
What is the primary function of elevator guide rails?
Conveyance System Installation
When installing guide rails, what is the acceptable method for correcting an out-of-plumb condition at a bracket location?
On a traction elevator, what is the purpose of the hoistway door interlock?
Which statement about traction sheave grooves is correct?
On a high-rise traction elevator, what is the purpose of the compensating chain or rope?
On a conventional in-ground hydraulic elevator, what supports and guides the plunger as it extends?
The elevator controller, drive, and main disconnect are typically located in the machine room. What clearance must be maintained at the controller?
After installing a new door operator, the hoistway doors close but the interlock does not latch at one landing. What is the most likely cause?
During escalator installation, what determines the correct tension on the step chain after the truss and tracks are set?
Which component is routinely lubricated during scheduled elevator maintenance to reduce car-running friction?
Conveyance Repair Maintenance And Modernization
An elevator door reopens immediately when a passenger steps in, but the door does not reopen for an object placed in the beam at floor level. What is the most likely cause?
During a pit inspection, the mechanic finds a hydraulic buffer with the 'buffer compressed' indicator tripped and oil on the pit floor. What is the correct action?
When modernizing an elevator by replacing the relay-logic controller with a microprocessor controller, which step is essential before the new controller is energized?
An elevator will not start from any landing. The controller indicates an open safety string. Which condition would cause this?
Before entering a hoistway to perform maintenance, the mechanic's first action at the machine room disconnect must be to:
Safety
When working on top of an elevator cab in the hoistway, what fall protection is required?
When the hoistway doors must be open during installation or repair, what is the required protection at each open landing?
Which PPE is required when working in an elevator machine room with exposed live controllers?
A full-load test is required for a new passenger elevator with a rated capacity of 2,500 lb. What load must be placed in the car, and what is the test criterion?
The overspeed governor on a passenger elevator is set to trip the car safeties at approximately what percentage above rated speed?
When preparing a material list for a traction elevator installation, which item is typically ordered with the longest lead time and should be ordered first?
During the code-review phase of a California elevator project, which two codes must the C-11 contractor verify apply together?
When building a project schedule for a multi-elevator bank modernization in an occupied building, what phasing approach is most commonly required?
For a 1:1 roped traction elevator with 60 ft of travel and 12 ft of overhead sheave height above the top landing, the suspension rope length per line is approximately:
Before bidding an elevator modernization, a site visit reveals the existing machine room has a low ceiling that does not meet current code clearance. What is the correct action?
What is the function of the smoke and fire doors at the elevator landing entrances?
When installing guide rails, what determines the maximum allowable spacing between rail brackets?
When installing a traveling cable, what practice prevents premature fatigue failure?
On an in-ground hydraulic elevator installation, what protection is required for the buried cylinder to prevent environmental corrosion?
On a sling-type elevator cab installation, what supports the cab enclosure on the car frame?
When mounting hall button stations, what is the correct location convention?
After setting an escalator, the comb plate teeth must mesh with the step teeth. What condition is required at the comb line?
What determines the required stroke (compression) length of the buffers installed in the pit?
When terminating control wiring in a microprocessor elevator controller, what practice prevents nuisance faults?
What is the purpose of the dead-end hitch (rope shackles) at the counterweight and car sides of the suspension ropes?
What is the lighting requirement in an elevator machine room?
When setting a traction machine on the machine room floor, what is required under the machine base?
During a routine maintenance visit, what is the appropriate way to inspect the suspension ropes?
An elevator stops level but the brake makes a loud chatter on stop. What is the most likely cause and correct action?
A hydraulic elevator drifts down overnight with no car calls and the valve closed. What is the most likely cause?
What type of fire extinguisher is appropriate for an elevator machine room with electrical controllers?
What is the purpose of the pit stop switch?
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