Question 405Electricity/Electronics - Assistant Engineer70% to pass
As shown in the illustration of an electrically operated watertight door controller, how is the motor stopped automatically when the door is wedged closed? Illustration EL-0115
AI Explanation
The correct answer is D) Action of door closed limit switch (LSC).
When an electrically operated watertight door is fully closed, the door closed limit switch (LSC) is activated, which automatically stops the motor that drives the door. This is a safety feature designed to prevent damage to the door or the motor if the door becomes wedged or obstructed while closing. The other options are incorrect because they do not directly address the automatic stopping of the motor when the door is fully closed.
Related Questions
#403 As shown in the illustration of an electrically operated watertight door controller, how is the motor stopped automatically when the door is wedged open? Illustration EL-0115 #404 By what means is the burning of controller contacts due to arcing, when opening, prevented? #406 A digital multimeter is set up as shown in the illustration to test an individual element of a three-phase immersion heater. The elements are connected across terminals 1 and 4, 2 and 5, and 3 and 6 as shown. The reading across terminals 1 and 4 is 32 ohms. The reading across terminals 2 and 5 is 32 ohms. The reading across terminals 3 and 6 as shown is "OL" ohms. What condition is indicated? Illustration EL-0216 #407 Which of the following conditions will occur if the brake solenoid coil burns out on a cargo winch with an electrical brake? #408 Refer to figure "A" representing an electric oven as shown in the illustration. With the oven turned on, the power available indicator light is off, the oven on indicator light is off, and only elements "6" and "7" appear to be producing heat. Which fuse is blown? Illustration EL-0041