ARCH 502-3 BUILDING UTILITIES - 04 Transportation Systems Exam questions and answers

ARCH 502-3 BUILDING UTILITIES - 04 Transportation Systems Exam questions and answers Elevator - answerGenerally used in buildings where several peak periods of traffic occur each day, (i.e. In office buildings, hospitals, apartment buildings). Machine Room - answerA room housing the hoisting machinery, control equipment, and sheaves for raising and lowering an elevator car, in an oil hydraulic elevator. Car Frame - answerThe structural steel frame of an elevator car to which are attached the platform, guide shoes, elevator car safety, hoisting cables and control equipment. Lantern - answerA light, usually over the entrance to an elevator on each floor of a multistory building that signals the approach of the elevator. Annunciator - answerA signaling apparatus in an elevator car or at a landing that displays a visual indication of floor landings. Call Button - answerA pus button for requesting an elevator. Door Interlock - answerA safety device for preventing the operation of an elevator car unless the hoistway door is locked in the closed position. Door Contact - answerA safety device for preventing the operation of an elevator car unless its door or gate is fully closed. Shaft - answerA part of an electric elevator serving as the vertical passageway for car and counterweights. Car - answerA cage of light metal in an electric elevator, supported on a structural frame, the top member of which the cables, that carry the car, are fastened. Cables - answerServe as the means for lifting or lowering the car in an electric elevator, usually 3 to 8 cables placed in parallel fastened to top of car by cable sockets passing over a motor driven cylindrical sheave to the counterweights. Counterweights - answerRectangular blocks of cast iron stacked in one frame which is fastened to the opposite ends of the cables to which the car is fastened. Guide Rails - answerVertical tracks that guide the car and the counterweights. Machine Room - answerA room usually placed directly above the shaft in which the elevator machine is housed. It contains the motor-generator (MG) set which supplies energy to the elevator machine, the control board and the control equipment. Elevator Machine - answerTurns the sheave that lifts and lowers the car. Controls - answerA combination of push buttons, contacts, relays, and devices, operated manually or automatically to initiate door opening, starting acceleration, retardation, leveling and stopping of the car. Main Brake - answerA transportation safety device mounted directly on the shaft of the elevator machine. Safety Switch - answerDesigned to stop an elevator car automatically before car speed becomes excessive. On overspeed, the speed governor will cut off power to the motor and set the brake. Electric Final Limit Switches - answerLocated a few feet below and above safe travel limits of elevator car. If car over-travels, either down or up, these switches de-energizes the motor and sets the main brak