Unit 2 Flashcards
How is the reversal stop device reset?
Manually
What mechanical operation of the contacts is required by the stop switch of an escalator?
Open circuit when stop switch is engaged, & remains open independently
What device shall be provided exclusively on curved escalators to cause the opening of the power circuit and I the driving machine motor and brake?
Step lateral displacement device
What device must remove power from the driving machine motor and brake when activated?
Egress restrictor
What is used on an escalator to help passengers identify the leading edge of one step and the riser of the next during travel?
Step demarcation lights, or yellow markings on back and sides of steps
What is the name of the component used to provide load distribution in the wellways?
Bearing plate
What is the maximum allowed spacing for anti slide devices on decking of escalators?
78inches/1981mm
What is the name of the portion of the building that receives and supports the truss?
Wellways
What device is used to level the truss assembly to finished floor height?
Jack bolts
What is the name of the steel framework that houses and supports the components of the escalator?
Truss
What is the name of a treadway component used on a moving walk?
Pallets
What is the minimum height for an anti slide device fastened to the escalator deck
2inch/50mm
What brake component provides friction between a flywheel attached to the motor drive shaft of an escalator?
Band
What switch monitors bi directional movement of an escalators tension carriage?
Broken step/pallet chain switch
What portion of an escalator is made up of all the components installed above the steps?
Balustrades - hand rail, interior panels, skirt boards
