2036. Which of the schematic symbols shown in the illustration represents the device shown in figure «F» of the illustration

Choice 3 is correct; it is the standard schematic symbol for a manually operated switch, which matches the hand-operated device shown in figure F. Figure F depicts a manually actuated switch, indicated by the hand lever. The schematic symbol must show a manual operator, typically represented by a circle. Symbols 1, 6, and 8 represent mechanically or process-actuated devices, not a manual operator.