Short tests for Level I can be found in this course folder:
2018 Level I Online Question Bank (on the learning portal)
These tests are shorter then the full Q-bank and each test contains approx. 20-25 questions.
The learning outcomes for that reading are distributed among each test. e.g. if a reading has 5 learning outcomes a,b,c,d,e then we have tried to make sure that each test has a few questions for each L.O.