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  2. Pilot certification in the United States - Wikipedia

    en.wikipedia.org/wiki/Pilot_certification_in_the...

    The FAA may impose limitations on a pilot certificate if, during training or the practical test, the pilot does not demonstrate all skills necessary to exercise all privileges of a privilege level, category, class or type rating. For example, a holder of a DC-3 type rating who does not demonstrate instrument flying skills during the practical ...

  3. Tire code - Wikipedia

    en.wikipedia.org/wiki/Tire_code

    Starting in 1972 tires were specified by load rating, using a letter code. In practice, a higher load rating tire was also a wider tire. In this system a tire had a letter, optionally followed by "R" for radial tires, followed by the aspect ratio, a dash and the diameter – C78-15 or CR78-15 for bias and radial, respectively. Each diameter of ...

  4. Federal Aviation Administration - Wikipedia

    en.wikipedia.org/wiki/Federal_Aviation...

    A Designated Engineering Representative (DER) is an engineer who is appointed under 14 CFR section 183.29 to act on behalf of a company or as an independent consultant (IC). [71] The DER system enables the FAA to delegate certain involvement in airworthiness exams, tests, and inspections to qualified technical people outside of the FAA. [72]

  5. Common European Framework of Reference for Languages

    en.wikipedia.org/wiki/Common_European_Framework...

    An intergovernmental symposium in 1991 titled "Transparency and Coherence in Language Learning in Europe: Objectives, Evaluation, Certification" held by the Swiss Federal Authorities in the Swiss municipality of Rüschlikon found the need for a common European framework for languages to improve the recognition of language qualifications and help teachers co-operate.

  6. Taxation in the United States - Wikipedia

    en.wikipedia.org/wiki/Taxation_in_the_United_States

    For example, a partner is taxed on the partner's allocable share of the income of an entity that is or, under entity classification rules, is classified as a partnership. Another example relates to the grantors or beneficiaries of trusts. Yet another example relates to the United States shareholders of controlled foreign corporations.

  7. Psychology - Wikipedia

    en.wikipedia.org/wiki/Psychology

    By 1370, the Chinese system required a stratified series of tests, involving essay writing and knowledge of diverse topics. The system was ended in 1906. [188]: 41–2 In Europe, mental assessment took a different approach, with theories of physiognomy—judgment of character based on the face—described by Aristotle in 4th century BC Greece ...

  8. Gas turbine - Wikipedia

    en.wikipedia.org/wiki/Gas_turbine

    For example, large jet engines operate around 10,000–25,000 rpm, while micro turbines spin as fast as 500,000 rpm. [30] Mechanically, gas turbines can be considerably less complex than Reciprocating engines. Simple turbines might have one main moving part, the compressor/shaft/turbine rotor assembly, with other moving parts in the fuel system.