The first sentence is asking for a promise or a prediction. The asker wants to know an exact time or if they can make a decision with certainty based the release of the clerk results.
Consider this situation:
"I'd like to make a purchase with my debit card. When will the money be in my account?"
"It will be in your account at 3pm."
"Ok, so if I make a purchase at 4pm, I will not have an overdraft?"
"That is correct."
The second sentence is asking for a possibility in the future, or about a regular action that occurred in the past. Because you have "will" in your first example, I will assume that you want the future possibility use of "would."
In your second sentence, it is possible that a number of conditions need to be met for something to happen in the future. Consider this example:
"Assuming I signed the check today and the issuing bank verified the funds today, when would the funds be available for use?"
"If everything happens today as you say, the funds would be available by 3pm."
You asked about using Will and Would in question form. The examples you gave start with "When" so the use of would and will relate to time, probability, and conditions that need to be met. Will and would are used in many other ways and is too long for this space. You can start by looking in Raymond Murphy's "English Grammar in Use" published by Cambridge. This book has many fine, clear examples that will help you understand this subject more. It is not expensive, and can be found almost anywhere, or ordered from a local bookseller who can easily obtain it from a regional distributer.
Best Answer
"can ever" refers to the ability to dp something. So the first sentence means that it's not possible to imagine how much the world has to offer.
"will ever" is a predication about whether something will happen. So the second sentence means that you'll never imagine how much the world has to offer.
The two meanings are related, though: if you can't do something, then you obviously won't do it (although you might try). The two sentences emphasize different aspects of this relationship.
The first form is much more common: