21. The students are required to pass an oral examination, a written test, and a practical test . 22. In many countries, passing a written driving test is required to be allowed to sit the practical test . 23. It provided the first practical test of the application of the cantilever principle to long-span bridge design. 24. After this period, the conversion procedure or licensing theory and practical tests must be taken all over again. 25. In an interview for graduate school at Yale University, a biology professor made him submit to a practical test . 26. For the practical test of BGE, 12 lessons were prepared in order to cover half of a school year. 27. There are two Military Training Qualification tests to take in the first two years, involving written and practical tests . 28. It is also a required teaching and demonstration task during the practical test for a flight instructor's certificate. 29. In addition a theory test must be taken prior to taking a practical test for any type of motorcycle licence. 30. To be certified, professional stringers must pass a written and practical test by the U . S . Racquet Stringers Association.
