About PH Exam Prep
An independent practice platform for the Professional Hydrologist (PH) exam - real questions across every exam domain, each with a plain-language explanation.
What's on the PH exam
The Professional Hydrologist (PH) exam is organized into 10 knowledge domains. It has 200 questions and is completed in 8 hours. Each domain makes up a different share of the exam, so the most efficient way to prepare is to know where the weight sits and practice accordingly:
- Water Quantity and Quality in the Field
- Quantity and Timing of Flow
- Assessing Water Quality Conditions, Impacts and Sources
- Statistical Analyses
- Collection and Inventory of Basic Hydrological Data31% of the exam
- Interpretation, Analysis & Modeling of Hydrological Processes46% of the exam
- Design Hydrological Systems23% of the exam
- Collection and Inventory of Basic Hydrological Data51% of the exam
- Interpretation, Analysis & Modeling of Hydrological Processes38% of the exam
- Design Hydrological Systems11% of the exam
Every practice question on this site is organized across these 10 domains, so your study tracks the real exam structure instead of guesswork. As you answer, the per-domain analytics surface the areas still costing you points, so your review goes where it moves your score.
What we believe good exam prep looks like
Realistic practice beats passive reading. Every question is written to mirror the style and difficulty of the real exam, with a clear explanation of why the right answer is right and the others aren't.
Your weak spots should find you. Domain analytics, mistake review, and re-drilling are built in, so study time goes where it moves your score.
Pricing should be simple. One payment for a fixed access window matched to your exam date. No subscription, no auto-renewal, and 10 free questions to try before you spend anything.
Get in touch
Questions, feedback, or something not working? Email support@boardmentor.study - candidate messages are read and answered.