As shown in the illustration of an...

Question 1 / 2066636eed28f7522a1c51db4b

Question 1 of 2066636eed28f7522a1c51db4b

As shown in the illustration of an electrically operated watertight door controller, how is reversal of the direction of the DC motor rotation achieved? Illustration EL-0115

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Question 1 of 20

66636eed28f7522a1c51db4b

As shown in the illustration of an electrically operated watertight door controller, how is reversal of the direction of the DC motor rotation achieved? Illustration EL-0115

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🔍 Key Concepts

• Trace how polarity at the DC door motor terminals changes in the circuit. • Compare the function of the O (open) and C (close) contactors/coils shown near the motor. • Notice what the LSO and LSC limit switches do versus what actually reverses current through the motor.

💭 Think About

• Look at the four contacts around the door motor. When one set pulls in versus the other, what happens to the direction of current through the motor? • Do the reset master switch, remote closing switch, or limit switches change polarity, or do they only enable/interrupt a circuit? • Which component(s) directly control whether the motor is in the "open" circuit or the "close" circuit?

✅ Before You Answer

• Verify which device actually routes L1 and L2 to opposite sides of the DC motor when changing direction. • Confirm that the limit switches (LSO/LSC) only stop travel at the end of stroke and do not themselves swap leads. • Identify which item in the choices corresponds to energizing the contactor that feeds the open or close circuit to the motor.

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Question 1 of 20

As shown in the illustration of an electrically operated watertight door controller, how is reversal of the direction of the DC motor rotation achieved? Illustration EL-0115

The reset close master switch is closed.

The individual remote closing switch is closed.

The LSO switch or LSC switch is opened.

Either the open coil or closed coil is energized.

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Question 1 / 2066636eed28f7522a1c51db4b

Question 1 of 2066636eed28f7522a1c51db4b

As shown in the illustration of an electrically operated watertight door controller, how is reversal of the direction of the DC motor rotation achieved? Illustration EL-0115

Back

Question 1 of 20

66636eed28f7522a1c51db4b

As shown in the illustration of an electrically operated watertight door controller, how is reversal of the direction of the DC motor rotation achieved? Illustration EL-0115

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

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