MockDPE is an AI Instrument Rating Oral Exam Simulator designed to help pilots prepare for the FAA Instrument Rating (IFR) checkride or Instrument Proficiency Check (IPC). The tool presents a full, voice based mock checkride in which an AI acts as a Designated Pilot Examiner (DPE). Questions are scenario based and drawn from the FAA Instrument Airman Certification Standards (ACS). After each response, the system scores the answer against ACS criteria and provides an area by area debrief that identifies specific knowledge gaps. The first full checkride simulation is available at no cost. The simulator integrates live weather data by pulling current METAR and TAF reports from airports selected by the user. These real conditions are woven into exam questions. For example, a question might present a destination with a 600 foot ceiling and two miles visibility in mist and then ask whether an alternate airport must be filed. The tool relies on AI for speech synthesis, DPE persona generation, and dynamic scenario construction, but the application has been designed with an emphasis on accuracy and user benefit, validated by CFII rated instructors. No special hardware or software is required beyond a web browser and a microphone; the service runs entirely through the website at mockdpe.org. Typical use involves a pilot sitting for a practice session that mirrors the oral portion of a checkride. The user speaks their answers aloud, receives real time feedback, and later reviews the detailed debrief to identify which ACS tasks need further study. The tool is intended for instrument rated pilots preparing for initial checkrides, recurrent IPC events, or anyone wanting a structured method to assess their IFR knowledge. Kevin, a commercial pilot and backend developer, created MockDPE after finding existing resources like videos and flashcards insufficiently interactive for his own preparation. He built the platform to leverage AI for generating realistic, adaptable scenarios while avoiding generic or inaccurate outputs.