What does the component labeled "D" shown in...

Question 1 / 270705eccefa4bacbc34ba4d4843a

Question 1 of 270705eccefa4bacbc34ba4d4843a

What does the component labeled "D" shown in the illustration represent? See illustration EL-0093.

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Question 1 of 27070

What does the component labeled "D" shown in the illustration represent? See illustration EL-0093.

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🔍 Key Concepts

• Review how a shipboard intercom or telephone selector works between multiple machinery spaces • Note the function of the numbered arc with a movable contact/handle at each station • Compare that to what a junction box or indicator symbol would look like on an electrical diagram

💭 Think About

• Ask yourself: In order for the Engine Room to "ring on #9", which device in this symbol would let you choose which remote station you are calling? • Look at the wiring: Does the component marked "D" simply join wires together, show an indication, or actually select one of several possible circuits? • Which of the answer choices describes a device that connects one common line to one of several numbered outputs, like the 1–11 markings shown?

✅ Before You Answer

• Verify whether the numbered scale and moving contact at "D" behaves as a switch (one position at a time) rather than an indicator or counter. • Confirm that a junction box would normally just show terminals tied together, without a rotating or movable element. • Make sure a vibrating reed indicator would usually be drawn as a set of small reeds or bars, not as a single pointer over a numbered dial.

Question 1 of 27070

What does the component labeled "D" shown in the illustration represent? See illustration EL-0093.

station selector switch

vibrating reed indicator

junction box

ring counter

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Question 1 / 270705eccefa4bacbc34ba4d4843a

Question 1 of 270705eccefa4bacbc34ba4d4843a

What does the component labeled "D" shown in the illustration represent? See illustration EL-0093.

Back

Question 1 of 27070

What does the component labeled "D" shown in the illustration represent? See illustration EL-0093.

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