I've taken the Oregon Private Applicator's Test three times now, and passed all three. It seems like a darn tough test when I compare it with my recollections of college and military service tests. Part of the problem is that Oregon offers only one general purpose study manual, and it provides study material for all of the various categories of tests. One does not know in advance what materials will be tested for, and to what degree. The state tells weighting, but my experience has been that the weighting advertised is different than how the test is actually written.