Q19: What are the alternatives for taking an FAA written examination?

A:  Multiple commercial vendors offer computerized testing with results
    available immediately after you finish the test.  Costs range from $40
    to $85 for a test.  To find out where your nearest testing center is
    and to schedule a test, contact one of
    Lasergrade Computer Testing <http://www.lasergrade.com>
        1-800-211-2754 or 1-360-896-9111,
    Aviation Business Services (Computerized Aviation Testing Service)
        1-800-947-4228 or 1-415-259-8550, or
    Sylvan/Prometric 1-800-359-3278, 1-800-967-1100, 1-612-896-7702 or
        1-410-843-8000 x8890 

     You will need a written authorization before you can take most FAA
     tests.  This may be obtained from an appropriately rated and
     FAA-Certificated Flight Instructor or Ground Instructor, or, if you
     completed a home-study course, with some difficulty you can get your
     local FSDO to sign you off.