WASTEWATER PRACTICE EXAM QUESTIONS AND ANSWERS
Odors occur when treatment becomes - CORRECT ANSWER✅✅✅Anaerobic
What should an operator do before entering a manhole - CORRECT ANSWER✅✅✅Test for all
hazardous gases and oxygen levels and ventilate the manhole before entering
What treatment devices is commonly used to separate and remove large solids from raw wastewater -
CORRECT ANSWER✅✅✅a mechanically raked bar screen
What diseases are caused by pathogenic organisms that may be present in raw wastewater? - CORRECT
ANSWER✅✅✅Hepatitis, typhoid, paratyphoid, dysentery, and cholera
What is typically used to dewater sludge? - CORRECT ANSWER✅✅✅Belt press, Drying beds, solid
bowl centrifuge, and gravity thickener
Calculated the volume in gallons of a rectangular aeration tank that is 60 feet long, 30 feet wide and 20
feet deep - CORRECT ANSWER✅✅✅269,280
What is typically used whenever wastewater cannot flow to the treatment plant by gravity - CORRECT
ANSWER✅✅✅Lift station
A centrifugal pump must be ? or it will not pump - CORRECT ANSWER✅✅✅Primed
One common type of weir design for measuring flow is - CORRECT ANSWER✅✅✅V-Knotch
The operator would need to increase or decrease if the ? loading on the plant is high - CORRECT
ANSWER✅✅✅increase/Organic
A simple method for indication when to waste sludge is - CORRECT ANSWER✅✅✅Total
sedimentation test
Odors occur when treatment becomes - CORRECT ANSWER✅✅✅Anaerobic
What should an operator do before entering a manhole - CORRECT ANSWER✅✅✅Test for all
hazardous gases and oxygen levels and ventilate the manhole before entering
What treatment devices is commonly used to separate and remove large solids from raw wastewater -
CORRECT ANSWER✅✅✅a mechanically raked bar screen
What diseases are caused by pathogenic organisms that may be present in raw wastewater? - CORRECT
ANSWER✅✅✅Hepatitis, typhoid, paratyphoid, dysentery, and cholera
What is typically used to dewater sludge? - CORRECT ANSWER✅✅✅Belt press, Drying beds, solid
bowl centrifuge, and gravity thickener
Calculated the volume in gallons of a rectangular aeration tank that is 60 feet long, 30 feet wide and 20
feet deep - CORRECT ANSWER✅✅✅269,280
What is typically used whenever wastewater cannot flow to the treatment plant by gravity - CORRECT
ANSWER✅✅✅Lift station
A centrifugal pump must be ? or it will not pump - CORRECT ANSWER✅✅✅Primed
One common type of weir design for measuring flow is - CORRECT ANSWER✅✅✅V-Knotch
The operator would need to increase or decrease if the ? loading on the plant is high - CORRECT
ANSWER✅✅✅increase/Organic
A simple method for indication when to waste sludge is - CORRECT ANSWER✅✅✅Total
sedimentation test
