On the left side, the beam is held by a pin to prevent it from moving horizontally but allow it to rotate. On the right side, it is held up by a roller.
That is what we needed to know. What was the strange thing on the left side meant to represent? Once you've told us that this strange triangular thing means that "the beam is held by a pin to prevent it from moving horizontally but allow(s) it to rotate" then we can start thinking about the question. Until then, we can't even begin to guess at the answer, 'cos we need to guess at what the triangular thing means.
You've conflated two completely different questions. One is a question about physics, the other is a question about what a technical specialist in a particular field means when he draws a triangle and a circle. You can't test people's common sense until you've explained that to them, any more than you can test our common sense about a question phrased in Russian until you've translated the question from Russian into English. Common sense does not provide a right or a wrong answer to the question Когда?