WASTE WATER CERTIFICATION
EXAM REVIEW TESTED QUESTIONS
ACCURATE SOLUTIONS
⫸ a manhole shelf is Answer: the working areas on either side of the
invert
⫸ the hydraulic head losses associated with transitions are Answer:
friction and conversion losses
⫸ inverted siphons are used to Answer: cross depressions or small water
courses
⫸ a hydraulic jump is likely to occur where Answer: wastewater
moving at a high velocity at shallow depth strikes wastewater having a
substantial depth
⫸ Drawdown is a hydraulic term that refers the following condition in a
typical sewer Answer: the surface curve at a free flowing outlet of a pipe
⫸ the hydraulic radius of a sewer refers to Answer: the wetted perimeter
divided by the diameter
, ⫸ an equation that describes the gravity flow of wastewater in sewer
pipes is Answer: the manning equation
⫸ when crossing under a stream which type of pipe is most commonly
used Answer: Ductile iron
⫸ wastewater is typically Answer: 99.9% water
⫸ Exfiltration is a problem in wastewater collection systems because
Answer: it may contaminate an aquifer
⫸ A trunk sewer is?
a. A main sewer line that receives many laterals
b. A main sewer line that receives many branches
c. A main sewer line that serves a large territory
d. All the above Answer: c. a main sewer line that serves a large
territory
⫸ the angle of repose is defined as Answer: Maximum natural slope
⫸ Excessive flows encountered during a storm are
an indication of?
EXAM REVIEW TESTED QUESTIONS
ACCURATE SOLUTIONS
⫸ a manhole shelf is Answer: the working areas on either side of the
invert
⫸ the hydraulic head losses associated with transitions are Answer:
friction and conversion losses
⫸ inverted siphons are used to Answer: cross depressions or small water
courses
⫸ a hydraulic jump is likely to occur where Answer: wastewater
moving at a high velocity at shallow depth strikes wastewater having a
substantial depth
⫸ Drawdown is a hydraulic term that refers the following condition in a
typical sewer Answer: the surface curve at a free flowing outlet of a pipe
⫸ the hydraulic radius of a sewer refers to Answer: the wetted perimeter
divided by the diameter
, ⫸ an equation that describes the gravity flow of wastewater in sewer
pipes is Answer: the manning equation
⫸ when crossing under a stream which type of pipe is most commonly
used Answer: Ductile iron
⫸ wastewater is typically Answer: 99.9% water
⫸ Exfiltration is a problem in wastewater collection systems because
Answer: it may contaminate an aquifer
⫸ A trunk sewer is?
a. A main sewer line that receives many laterals
b. A main sewer line that receives many branches
c. A main sewer line that serves a large territory
d. All the above Answer: c. a main sewer line that serves a large
territory
⫸ the angle of repose is defined as Answer: Maximum natural slope
⫸ Excessive flows encountered during a storm are
an indication of?
