The Board of Appeals shall adopt rules in accordance with the provisions of this chapter. Meetings shall be held at the call of the Chairman and at such other times as the Board of Appeals may determine. The Chairman or Acting Chairman of the Board of Appeals, if there is one, may administer oaths and compel the attendance of witnesses. All meetings of the Board of Appeals shall be open to the public, and a record of all proceedings shall be kept, showing the vote of each member upon each question or, if absent or failing to vote, indicating such fact. The Board of Appeals may take action by a majority of the members present, provided that a quorum is present. A quorum is defined as a majority of the members of the Board of Appeals. The Board of Appeals shall keep records of its examinations and other official actions. All records shall be filed immediately in the office of the Board of Appeals and shall be public.