Texas Wastewater Class A Exam
Version A And B Complete Questions
with Detailed Verified Answers
Already Graded A
In Texas, an oxidation ditch treatment plant is referred to as ---
correct answer ---Racetrack
In Texas, pH meters are required to be calibrated on how many
buffers? --- correct answer ---two
An industrial complex has a BOD discharge to the POTW of 500
pounds per population equivalent of this industry is --- correct
answer ---500 lbs - 2,941 0.17 lbs BOD/ person 2941
What substance will interfere with a DPD chlorine test? --- correct
answer ---Manganese
The parameters of the BOD test are --- correct answer ---5 days at
20° Centigrade
An Imhoff tank is what type of treatment process? --- correct
answer ---Primary
Standard Dimension Ratio in pve pipe is defined as --- correct
answer ---Ratio of OD pipe diameter to wall thickness
,MSDS sheets must be kept for how many years after you have
stopped using the chemical? --- correct answer ---c. 30
A pneumatic ejector is --- correct answer ---a. a lift station
pumping device
How should shoring be removed from a trench? --- correct answer -
--d. from the bottom up
57. The most common pump used in the collection system is ---
correct answer ---d. centrifugal
In low pressure sewer systems where each tap must have a grinder
pump lift station, the lift station is considered to be --- correct
answer ---Part of the collection system and the responsibility of the
utility
Effective communication depends on --- correct answer ---being a
good listener
A construction site safety evaluation checklist must include ---
correct answer ---a. placement of equipment, vehicles, and spoil
bank b. placement of flaggers, barricades, cones and other safety
equipment c. use of warning signs
When designing a wastewater collection system, the engineer
considers the population for how many years in the future? ---
correct answer ---50
, According to 30 TAC Chapter 317, all pipe and fittings used in
wastewater pressure mains shall have a minimum psi pressure
rating of --- correct answer ---150
The minimum velocity of flow in a wastewater line should be ---
correct answer ---2.0 fps
At a construction job site, as the roadway speed increases, the
spacing barricades should --- correct answer ---increase
A piston pump with a 5-inch piston and a 10-inch stroke strokes 60
times a minute. How many minutes will operated to pump 6,000
gallons? --- correct answer ---5x5x0.0408x0.833x60 = 51 gpm
6,000 gal/51 gpm=117.6
round to 118
A bubbler level control system works off of what principal? ---
correct answer ---differential pressure
67. The major cause of wastewater line stoppages is --- correct
answer ---roots and grease
What type of valve is usually used for isolation? --- correct answer
---gate
Carbon monoxide (CO) poisoning symptoms are --- correct answer
---a. tightness in the chest b. nausea c. drowsiness and headache d.
all of the above
Version A And B Complete Questions
with Detailed Verified Answers
Already Graded A
In Texas, an oxidation ditch treatment plant is referred to as ---
correct answer ---Racetrack
In Texas, pH meters are required to be calibrated on how many
buffers? --- correct answer ---two
An industrial complex has a BOD discharge to the POTW of 500
pounds per population equivalent of this industry is --- correct
answer ---500 lbs - 2,941 0.17 lbs BOD/ person 2941
What substance will interfere with a DPD chlorine test? --- correct
answer ---Manganese
The parameters of the BOD test are --- correct answer ---5 days at
20° Centigrade
An Imhoff tank is what type of treatment process? --- correct
answer ---Primary
Standard Dimension Ratio in pve pipe is defined as --- correct
answer ---Ratio of OD pipe diameter to wall thickness
,MSDS sheets must be kept for how many years after you have
stopped using the chemical? --- correct answer ---c. 30
A pneumatic ejector is --- correct answer ---a. a lift station
pumping device
How should shoring be removed from a trench? --- correct answer -
--d. from the bottom up
57. The most common pump used in the collection system is ---
correct answer ---d. centrifugal
In low pressure sewer systems where each tap must have a grinder
pump lift station, the lift station is considered to be --- correct
answer ---Part of the collection system and the responsibility of the
utility
Effective communication depends on --- correct answer ---being a
good listener
A construction site safety evaluation checklist must include ---
correct answer ---a. placement of equipment, vehicles, and spoil
bank b. placement of flaggers, barricades, cones and other safety
equipment c. use of warning signs
When designing a wastewater collection system, the engineer
considers the population for how many years in the future? ---
correct answer ---50
, According to 30 TAC Chapter 317, all pipe and fittings used in
wastewater pressure mains shall have a minimum psi pressure
rating of --- correct answer ---150
The minimum velocity of flow in a wastewater line should be ---
correct answer ---2.0 fps
At a construction job site, as the roadway speed increases, the
spacing barricades should --- correct answer ---increase
A piston pump with a 5-inch piston and a 10-inch stroke strokes 60
times a minute. How many minutes will operated to pump 6,000
gallons? --- correct answer ---5x5x0.0408x0.833x60 = 51 gpm
6,000 gal/51 gpm=117.6
round to 118
A bubbler level control system works off of what principal? ---
correct answer ---differential pressure
67. The major cause of wastewater line stoppages is --- correct
answer ---roots and grease
What type of valve is usually used for isolation? --- correct answer
---gate
Carbon monoxide (CO) poisoning symptoms are --- correct answer
---a. tightness in the chest b. nausea c. drowsiness and headache d.
all of the above
