Unlike the Parliamentary system, the concept of 'question hour' or 'question time' doesn't really exist in the American legislature. Here's an interesting report done by the Congressional Research Service on the possibility of a question time in the US. From our point of view, the report is interesting because it reviews the existing provisions for a Parliamentary Question Time in different countries (India isn't mentioned), and considers the pros and cons of such a system. The report concludes: "Whether the question period would be successful in a system of separated powers depends in large part on the attitude of its participants and on the format the question period ultimately assumes. The question period has the potential of involving more rank-and-file Members in the policy-making process, and improving the means of communication between executive departments and the Congress. It also could harden relations between the Congress and the Executive, and might increase the level of partisan controversy in Congress." There's even an online petition among a few american bloggers to push for a question time in the US. Read about it here. In this country of course, parliamentary questions are an established feature of the work of Parliament. Parliamentary questions cover a huge range of topics and can be an mine of information and data about government policy. The Lok Sabha and Rajya Sabha sites put the complete text of all parliamentary questions (and the responses to them) online.
The Public Accounts Committee examines how the Government spends public money. It examines the amount granted by the Parliament and the amount actually spent. A Speaker in the past, has passed a direction which specifies clearly that a Minister cannot be summoned by the Financial Committees. This has been incorporated in a document titled "Directions by the Speaker" available here. The actual text of the direction reads - "99. (1) The Committee on Estimates or the Committee on Public Accounts or the Committee on Public Undertakings may call officials to give evidence in connection with the examination of the estimates and accounts, respectively, relating to a particular Ministry or Undertaking. But a Minister shall not be called before the Committee either to give evidence or for consultation in connection with the examination of estimates or accounts by the Committee." -Co-authored by Chakshu