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what is the reason for Wastewater to contain large amounts of sand gravel and grit correct answers storm events combined Wastewater is defined as correct answers sanitary Wastewater and stormwater runoff in general the solid content of Wastewater is about correct answers .1% what is the percentage of suspended solids in the total amount of solids correct answers 30% the percentage of dissolved solids in the amount of total solids is about correct answers 70% which type of org...

The first step in maintenance staff should take in properly locking and tagging out a piece of equipment is to correct answers alert the operator on duty When working in an area with two or more floor coverings, be sure that they are always correct answers Secured together When manually lifting any object be sure to correct answers keep it close to your body and use leg strength Oxygen deficiency becomes a concern when the oxygen level in a confined space is less than correct answer...

Primary Clarifiers correct answers In an activated sludge treatment system, primary treatment processes include the: Removal of Inorganic material from grit correct answers In a washing grit remover, the grit is moved slowly by screw conveyors up an inclined channel in order to? 90% or above correct answers An efficient primary clarifier is expected to remove ? of the influent settleable solids. Adequate DO at surface at all times correct answers Proper operation of a facultative po...

Liftstations at a treatment plant or those which discharge directly to a treatment plant with an average flow greater than 0.1 MGD shall have three or more pumps or have automatically controlled variable capacity pumps, these pumps should be adjusted to actual flow conditions and controlled to operate so as to: correct answers Minimize surges in the treatment in the treatment units. In the contact stabilization system of activated sludge treatment, the detention time in the contact zone is d...

A common remedy for activated sludge system problems is to increase the waste activated sludge flow rate, when would an increase of WAS rate not be correct? correct answers When straggler Floc is present in clarifier and settleometer The chlorine residual is falling An inspection of the 150lb cylinder and chlorine feed equipment shows ice forming on the chlorine regulator and feed lines. The best method to fix the falling chlorine residual is? correct answers Put another chlorine cylinder o...

If wastewater contains dissolved oxygen, the biological breakdown will reduce sulfate to sulfide. T or F correct answers False At a pH below 5, all sulfide is present in the gaseous h2s form and most of it can be released from wastewater. T or F correct answers True In order to control odors effectively, the operator should know where odors originate and the cause. T or F correct answers True Chlorination is one of the oldest and least effective methods of controlling odors. T o...

Percent of volatile solids normally in sludge correct answers 70-80% D.O. levels in a primary clarifier correct answers 0.5-1.0 MG/L Why are precautionary measures needed around an aeration basin? correct answers undertow and turbulence O.S.H.A. approved trench correct answers narrow excavation in which the depth is greater than the width; the width must be less than 15 feet What causes bulking? correct answers 1. Excessive hydraulic loading, 2. Solids not promptly removed fro...

Which of the following are used to create objects? Correct answers Concrete classes An _________ of an analysis class represents a piece of information that is relevant to the description of the class. Correct answers Attribute Which of the following would most likely not be an example of an attribute? Correct answers Cancel Appointment Which of the following types of attributes is not proper in an analysis class? Correct answers Compound A(n) _________ of an analysis class is where ...

Chapter 5: SMTPS (Simple Mail Transfer Protocol Secure) Correct answers A communications protocol used to send email across a network or the Internet. POP3 (Post Office Protocol version 3) Correct answers A standard for retrieving email messages from an email server. IMAP (Internet Message Access Protocol) Correct answers A protocol similar to POP that is used to retrieve email messages from an email server, but offers additional features, such as choosing which emails to download from the...

Data definition language Correct answers DDL Data manipulation language Correct answers DML CREAT SCHEMA AUTHORIZATION Correct answers Creates a database schema CREATE TABLE Correct answers Creates a new table in the user's databse schema NOT NULL Correct answers Ensures that a column will not have null values UNIQUE Correct answers Ensures that a column will not have duplicate values PRIMARY KEY Correct answers Defines a primary key for a table FOREIGN KEY Correct answer...