Interrogatives in Dependent Clauses

In the dialogue for this chapter, you see:

--Do you know where I can cut off the water? (correct)

This construction can be troublesome for learners of English, because there is a tendency to make the dependent clause (where I can cut off...) a question as well:

--Do you know where can I cut off the water? (incorrect)

Both do you know and where can I cut off the water are legitimate questions when used separately. However, when combined in a single sentence the main clause (Do you know...) carries the full weight of the interrogative.

Here are some additional examples:

--Do you see it? Where is it?
-->Do you see where it is?
--Do you know when? When does he arrive?
-->Do you know when he arrives?