Neiep 530 Elevator Cab Assembly and Door Operator questions and answers graded A+

Neiep 530 Elevator Cab Assembly and Door OperatorClosed Loop - correct answer A signal path that includes a forward path, a feedback path, and a summing point. Door Clutch - correct answer A device used in elevator power door operation to engage the car door to the landing door by a grasping and holding movement Driven Door - correct answer (1) Car door panel that is directly driven by the door operator. (2) The hoistway door panel mechanically driven by the car door Encoder - correct answer A device used to convert an analog signal into digital information Feedback - correct answer The transmission of current or voltage from output of a circuit or device back to the input where it interacts with the input signal to modify the operation of the circuit or device Fire Hooks - correct answer A device on the hoistway door that is installed in such a way that it holds the door in place if the intense heat of a fire should melt the plastic hanger rollers Fulcrum - correct answer The pivot point of a lever Gate Contact - correct answer A mechanically operated switch that prevents the operation of an elevator unless the elevator car gate or door is closed Insulated Gate Bipolar Transistor (IGBT) - correct answer A solid-state switch that combines the high input impedance and high switching speed characteristics of a MOSFET, with the high conduction ability of bipolar transistors. Used in inverters that require high-speed switching and high current capabilities Inverter - correct answer A device which is capable of converting direct current into alternating current