WASTEWATER CLASS B TEXAS ACTUAL
EXAM PAPER 2026 COMPLETE QUESTIONS
AND ANSWERS GRADED A+
⩥ The minimum size for a gravity flow sewer line on city right-of-way
and the minimum grade is. Answer: 6 inch and a grade of 0.50 percent
⩥ The most accurate way to find the average wastewater flow rate in an
existing 10-inch sewer main is. Answer: Obtaining actual flow data &
verifying with field data
⩥ What is the greatest advantage for using fiberglass manholes in areas
with high groundwater?. Answer: fiberglass is not subject to infiltration
⩥ A __________ pump would most likely be used when discharging into
a 10" diameter pressure sewer main.. Answer: Centrifugal
⩥ Excessive power consumption by a pump could be caused by.
Answer: Worn bearings and worn impeller
⩥ Trench safety is a great concern in Texas. OSHA requires that anytime
an excavation is greater than __ feet deep it must be protected by
______.. Answer: 5 feet / An approved Trench Box, Shoring, or Sloping
, ⩥ In an excavation if a ladder is used as a means of exit, it must extend
________feet above the ground and be secured and within ____ feet
laterally of anyone in the excavation.. Answer: 3 feet / 25 feet laterally
⩥ A ____________ would be the best to determine if a storm drain is
connected to a sanitary sewer line.. Answer: Smoke Test
⩥ _________ would most commonly be used to seal a number of joint
leaks on a main with minimal interruption. Answer: internal grouting
⩥ Pre-treatment of wastewater would include:. Answer: Coarse or fine
screening, grinding and grit removal and grease removal and pre-
aeration
⩥ Primary treatment of wastewater would include. Answer: settling
tanks or basins, scum collection and removal, sludge collection and
removal
⩥ Secondary treatment typically used today would include. Answer:
Stabilization ponds, trickling filters, rotating biological contractors
(RBC) & activated sludge
⩥ Essential components of the wastewater collection system include.
Answer: Sewer mains & piping, Lift Stations, Pumps, Grease & Sand
traps, & Manholes
EXAM PAPER 2026 COMPLETE QUESTIONS
AND ANSWERS GRADED A+
⩥ The minimum size for a gravity flow sewer line on city right-of-way
and the minimum grade is. Answer: 6 inch and a grade of 0.50 percent
⩥ The most accurate way to find the average wastewater flow rate in an
existing 10-inch sewer main is. Answer: Obtaining actual flow data &
verifying with field data
⩥ What is the greatest advantage for using fiberglass manholes in areas
with high groundwater?. Answer: fiberglass is not subject to infiltration
⩥ A __________ pump would most likely be used when discharging into
a 10" diameter pressure sewer main.. Answer: Centrifugal
⩥ Excessive power consumption by a pump could be caused by.
Answer: Worn bearings and worn impeller
⩥ Trench safety is a great concern in Texas. OSHA requires that anytime
an excavation is greater than __ feet deep it must be protected by
______.. Answer: 5 feet / An approved Trench Box, Shoring, or Sloping
, ⩥ In an excavation if a ladder is used as a means of exit, it must extend
________feet above the ground and be secured and within ____ feet
laterally of anyone in the excavation.. Answer: 3 feet / 25 feet laterally
⩥ A ____________ would be the best to determine if a storm drain is
connected to a sanitary sewer line.. Answer: Smoke Test
⩥ _________ would most commonly be used to seal a number of joint
leaks on a main with minimal interruption. Answer: internal grouting
⩥ Pre-treatment of wastewater would include:. Answer: Coarse or fine
screening, grinding and grit removal and grease removal and pre-
aeration
⩥ Primary treatment of wastewater would include. Answer: settling
tanks or basins, scum collection and removal, sludge collection and
removal
⩥ Secondary treatment typically used today would include. Answer:
Stabilization ponds, trickling filters, rotating biological contractors
(RBC) & activated sludge
⩥ Essential components of the wastewater collection system include.
Answer: Sewer mains & piping, Lift Stations, Pumps, Grease & Sand
traps, & Manholes
