When faced with a licensing exam, don't struggle with test anxiety! Use the question below and others from our Exam Study Guide series to properly study and prepare for exam questions. Take a look at this sample wastewater treatment licensing question along with an explanation of the correct answer.

Sample question:

Groundwater entering sewers through leaking joints, cracks or holes in pipes is also known as:

A) Inflow
B) Inference
C) Infiltration
D) Exfiltration

Answer:

Groundwater is a common source of infiltration, particularly when the ground is saturated. Inflow results in water entering the system from above ground. The answer is therefore, C, infiltration.

Source: WEF MOP11 17-4

About the author
Ricky Lallish is the Water Pollution Control program director at the Environmental Resources Training Center of Southern Illinois University Edwardsville. He provides training for entry level operators in the wastewater field and operators throughout the state looking to further their education.