Neiep 530 Elevator Cab Assembly And Door Operators Review Questions 67 Correctly Answered Questions Latest Update

Midpoint {Ans: The _______ clamp on a center opening cable relating device ensures both doors travel at the same speed in opposite directions.}Positive {Ans: During the opening sequence, voltage on terminal A2 of the door motor armature is _______. (Figure 17)}Slippage {Ans: on cable driven operators, _______ can damage the drive sheave as well as the drive cables.}2 1/2 {Ans: For doors with disabled re- opening devices, the maximum allowable kinetic closing force is _______ foot-pounds.}They do not detect objects in the opening but only those close to the door edge {Ans: What is a characteristic trait of all proximity door protective devices?}Minimum {Ans: When running an older AC motor, series resistance for the stator windings is _______ at high-speed.}Maximum {Ans: During the slow start closing sequence, R2 resistance is _______. (Figure 17)}Hydraulic {Ans: The direct coupled swing arm operator has _______ checks to dampen the door operator at the open and closed position.}12 {Ans: For passenger elevators with automatic leveling devices, door opening may begin within _______ inches of the landing for static drive systems.}An open travel cord {Ans: If motor voltage is present at the door motor terminals