Texas Wastewater Class A Exam (Latest 2023/ 2024 Update) Questions and Verified Answers| 100% Correct | Grade A

Texas Wastewater Class A Exam (Latest

2023/ 2024 Update) Questions and Verified

Answers| 100% Correct | Grade A

Q: The sludge from a primary clarifier should percent solids?

Answer:

4% to 6%

Q: What is eutrophication in a pond system?

Answer:

Enrichment with nitrogen and phosphorous Causes algae blooms (b and c)

Q: How often should pH meters be calibrated?

Answer:

Daily

Q: In Texas, pH meters are required to be calibrated on how many buffers?

Answer:

two

Q: An industrial complex has a BOD discharge to the POTW of 500 pounds per day. The

population equivalent of this industry is 500 lbs = 2,941 0.17 lbs BOD person

Answer:

2941

Q: The parameters of the BOD test are

Answer:

5 days at 20° Centigrade

Q: Standard Dimension Ratio in pvc pipe is defined as

Answer:

Ratio of OD pipe diameter to wall thickness

Q: How should shoring be removed from a trench?

Answer:

up from the bottom up

Q: In low pressure sewer systems where each tap must have a grinder pump lift station, station

is considered to be

Answer:

part of the collection system and the responsibility of the utility

Q: Effective communication depends on

Answer:

being a good listener

Q: When designing a wastewater collection system, the engineer considers the population for

how many years in the future?

Answer:

50

Q: According to 30 TAC Chapter 317, all pipe and fittings used in wastewater pressure shall

have a minimum psi pressure rating of

Answer:

150

Q: The minimum velocity of flow in a wastewater line should be

Answer:

2.0 fps

Q: At a construction job site, as the roadway speed increases, the spacing between cones and

barricades should

Answer:

increase

Q: The major cause of wastewater line stoppages is

Answer:

roots and grease

Q: Carbon monoxide (CO) poisoning symptoms are

Answer:

tightness in the chest nausea drowsiness and headache (all of the above)

Q: The smallest pipe size for air recirculation of a self-priming centrifugal pump is

Answer:

1 inch

Q: Dangerous gases in a confined space may not be detected with the physical senses because

Answer:

some gases have no odor some gases may deaden the sense of smell some gases may displace the

oxygen (all of the above)

Q: What are the dangerous gases a collection system worker might come into contact with?

Answer:

CO2 CO НaS CH4 (all of the above)

Q: On a construction job site, equipment booms must maintain at least how many feet of

clearance from overhead electric lines?

Answer:

10

Q: How should trench shoring be installed?