Just on a point of clarification. There is no rule that the answer or the question have to be a certain length of time or of equal weight. That is up to the individual speakers. It is not up to the Chair. Yes, I am here to balance it out but I will not be the one to tell the person asking the question or the person answering the question how long it should take. That would be presumptuous of the Chair, in my opinion.
In the House of Commons on May 13th, 2003. See this statement in context.