Anatomy Of An Elevator Flashcards
(25 cards)
Oil buffers are required below
Both the car and the counterweight for rated speed over 200ft/min
The final limit switch
Only operates if other controls fail
The purpose of the governor is to
Cause the power to be removed and the safety to set when overspeed occurs
The purpose of the compensating rope is to
Compensate for the change in balance due to the weight of the suspension ropes
The brake on the driving machine
Is released, electric power is removed and applied by spring force
The selector serves to
Provide signal to the controller on car position
The purpose of the traveling cables is to
Provide power and signal to the elevator car
The governor rope tension sheave
None of the above. (Is not required. Is located in the machine room. Is part of the counterweight frame.)
The modern hydraulic elevator receives hydraulic pressure from
An electric motor-driven pump
A roped-hydraulic elevator is
Required to have a car safety
The driving machine of a hydraulic elevator is considered to be
The motor, pump and tank. The control valve. (Both A and B)
The door operator for hydraulic passenger elevators is located
On the car top
The rated speed of modern hydraulic elevators is
Usually less than 200ft/min
A direct plunger hydraulic elevator has the plunger connected
To the car
The purpose of the motor generator is to
Provide DC power from AC power
If a traction elevator has a sheave on top of the car and counterweight, it is said to be roped
2:1
A roped-hydraulic elevator has a maximum ratio of
1:2
A type “A” safety
None of the above (Is the best there is. Is required for all hydraulic elevators. Is used only in hydraulic elevators)
Standing inside the elevator, if the door jamb is on the right, it is considered
Right hand application
According to the accessibility standard A117.1, a door must reverse and re-open if
A person or object comes within its path
If the closing speed of a horizontally sliding door system is increased
The kinetic energy will increase
The maximum allowable clearance between swinging hoist-way doors and car gates is
4 inches
A retractable safety edge (shoe) on a horizontal sliding door
Requires contact to cause the door to stop and reopen
Freight elevators usually have
Vertically sliding hoistway entrance doors and vertically sliding car gates
