Wastewater Exam Trick Questions Explained

Trick #1: Wrong Units

Example:

Flow given in GPM but formula requires MGD.

Many operators miss unit conversions.

Always check:

• gallons
• MGD
• feet
• minutes
• hours

Trick #2: Extra Information

Exams often include unnecessary numbers to confuse you.

Focus only on:
👉 what the question actually asks.

Trick #3: “Best” Answer Questions

Sometimes multiple answers seem correct.

Choose:

• safest operation
• most practical response
• process-stable answer

Trick #4: Negative Wording

Words like:

• NOT
• EXCEPT
• LEAST

Cause many mistakes.

I always slow down on these.

Trick #5: Process Logic Questions

Example:
“What happens if DO drops too low?”

Even if you forget exact wording:
👉 think through the biology logically.

Final Thought

Most operators fail wastewater exams for two reasons:

1. weak math confidence
2. memorizing instead of understanding

If you focus on:

• formulas
• process logic
• consistent practice

You can absolutely pass the first time.