Exam (elaborations)
Wastewater B Test (1).
- Course
- Institution
Wastewater B Test (1).
[Show more]
Seller
Follow
modockochieng06
Content preview
tx wwtp b licenseeach person contributes about _______ pounds of BOD daily - correct answer-0.17
a ladder must be within ______ feet of anyone in a trench - correct answer-25
Examples of point source discharges include which of the following - correct
answer-Municipal, industrial, and agricultural wastewater treatment facilities
Protecting Texas water from contamination requires which of the following of wastewater -
correct answer-Collection and transportation to treatment, treatment that removes
contaminants, processing and disposal of solids
Which of the following are normal operator controls of activated sludge process - correct
answer-RAS, WAS, DO
Ponding on a trickling filter is caused by which of the following - correct answer-Excessive
zoogleal growth,
Improper media ,
Poor primary treatment
Organic loading is the pounds per day of _______ per acre feet or 1000 cubic feet of media -
correct answer-BOD
An ultrasonic flow monitoring device works on the principle of _______ - correct
answer-sonar
The primary causes of waste water stoppages are _________ - correct answer-Roots and
grease
What is the range of the ph scale - correct answer-0-14
When an accidental discharge, bypass, or spill occurs, the discharger must notify TCEQ
within how long - correct answer-24 hours
An administrative penalty for discharging violations can be up to ______ per day - correct
answer-$25000
When chlorine is used, the effective disinfectant is __________ - correct answer-HOCL
one surface acre of ponds provides treatment for how many people - correct answer-300
Examples of waterborne pathogens are - correct answer-Typhoid, cholera, and dysentery
When sludge in an imhoff tank is near ______ inches of the slot, withdraw sludge - correct
answer-18
,A weir is an obstruction placed in a channel causing the water to what - correct
answer-Backup
The most important problem prevented by monitoring or restricting industrial waste is
__________ - correct answer-Worker exposure
Excavations ___________ Feet or deeper should be shored, shielded, or sloped - correct
answer-5
The primary purpose of returning sludge in the activated sludge process is to have enough
__________ in the aeration basin to match the food supply - correct answer-Micro
organisms
A simple method of determining when to dump waste from an activated sludge plant is the
_______ - correct answer-30 minutes settling test
imhoff tanks are ________ story units with _______ components - correct answer-two ,
three
Aerobic digestion is a _______ process whereby the Aerobic bacteria consumes themselves
- correct answer-endogenous
in a well operated anaerobic digester the methane gas content is about _________ - correct
answer-65-75%
Organic loading of a stabilization pond is about ________ pounds of BOD/acre/day with a
detention time of at least ______ days - correct answer-35 ; 30
Gas chlorinator feed rates are indicated by the _______ in pounds per day - correct
answer-Rotameter
Disease causing microorganisms are called ________ - correct answer-pathogens
Types of industrial waste are flammable oil, toxic gases, _________ - correct answer-Acids,
and alkalis
The bod test indicates the amount of organic matter that can be oxidized by biological and
chemical action in _______ days at __________ °C - correct answer-5 ; 20
The TCEQ set permit conditions including permit duration, quality of discharge, discharge
point, reporting requirements, and__________ - correct answer-Maximum discharge
Which of the following applies to the discharge of untreated wastewater into the waters of
the state - correct answer-It is a bypass,
it is an unauthorised discharge,
It must be reported to TCEQ within 24 hours
, A hazardous gas that a collection worker might encounter in a manhole is which of the
following - correct answer-Hydrogen sulfide,
methane,
carbon doxide
the line that carries wastewater to the treatment plant is called the _________ line - correct
answer-outfall
Some of the primary components of a collection system are pipes, Clean outs, grease traps,
Sand traps, inverted siphons, vent pipes, manholes, and ________ - correct answer-lift
stations
A ________ allows a wastewater line to cross below a hydraulic gradient - correct
answer-Inverted siphon
The minimum design velocity for an inverted siphon is _______ - correct answer-3 fps
Wastewater lines and manholes can be no closer to a waterline than ________ feet - correct
answer-9
The inside diameter of a man hole must be how wide - correct answer-48"
Cavitation is caused by lack of _________ - correct answer-Net Positive Suction Head
Prior to an infiltration test, allow the groundwater level to stabilize for ________ hours -
correct answer-24
The speed of an induction electric motor is determined about what factors - correct
answer-The number of Poles in the motor,
Cycles per second of electrical current
The main concern of the collection system worker is protecting public ________ - correct
answer-Health
if a lift station cannot be ________, and close it in a lockable building - correct
answer-fenced
Which of the following new manholes are not allowed by TCEQ - correct answer-brick
There are two sample types: grab sample and ______ sample - correct answer-composite
Traffic control devices must meet specifications of the _________ manual on uniform traffic
control devices for streets and highways - correct answer-texas
Entities that might contribute shock loads to the treatment plant include which of the
following - correct answer-Refineries,
food processors,
metal platers
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller modockochieng06. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77851 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now