Advanced Water Treatment Class Flashcards
This chemical forms a non-corrosive solution when mixed with water
Sodium Aluminate
What are functions of a utility manager?
Planning
Organizing
Staffing
Directing
What types of contaminants are considered to be of public health importance?
Inorganic contaminants, turbidity, organic contaminants, microbial contaminants, radiological contaminants
Not of importance - color
What would be part of an annual report?
Summary of treatment processes including flows and costs.
Review of goals and objectives for the year.
Expected goals and objectives for the next year.
___ is an organic organic chemical that is most frequently found in groundwater
Trichloroethylene
What are scada systems used for?
Monitor and control equipment, study trends in plant data, provide maintenance and operating reports
Indications of unsatisfactory performance of AC slip rings and brushes are
Sparking, ring burning, chattering or noisy brushes
Key components of a good preventative. Maintenance program are
Having a collection of regular duties required on a printed or displayed list, keeping supplies and spare parts available, keeping instrument components clean and sealed from moisture and contamination
What does a thin film of corrosion that forms on slip rings of variable speed AC three phase motors do
Create a normal coating on the metal, protects the metal surfaces, conduct electric current from the carbon brush to the metal slip ring
What are things that microfiltration can remove?
Suspended matter, turbidity, algae, fungi, protozoa, giardia, and cryptosporidium
What can ultrafiltration remove?
Algae, fungi, protozoa, bacteria, viruses, some natural organic matter, color
Computer control systems do
Monitor levels, pressures, flows, temperature, pH, turbidity
Operate pumps, valves, and alarms
Provide a log of historical data and analysis of data
What characteristics would result in an area being designated a permit required confined space
Has an internal configurations such that an entrance could be trapped or asphyxiated by inwardly converging walls, or by a floor that slopes downward and tapers to a smaller cross-section
Contains a material that has the potential to engulf an entrant
Contains or has a potential to contain a hazardous atmosphere
What are some characteristics of an automatic controller?
It can only do what is programmed to do, it can turn devices on or off, it can be set to proportionally control a variable, it can be shifted into manual operation
What is CT value?
The residual concentration of a given disinfectant in milligrams per liter, times the disinfectants contact time in minutes
What are some uses of synthetic organic chemicals (SOC’s)?
Pesticides, paints, and food additives
Employee performance evaluations are a time for the supervisor to
Prepare documentation of employee’s achievements as well as areas needing improvement and an opportunity to acknowledge employee’s unique contributions, as well as support future disciplinary actions, if needed
To provide adequate protection, what should the noise reduction rating (NRR) of the hearing protection device be?
85 dB or less
What is another name for hydrochloric acid (HCl)?
Muriatic acid
What is a limitation of the ion exchange softening process?
An increase in the sodium content, if the ion exchanger is regenerated with sodium chloride
What areas are most traffic control zones divided into
Advance warning area
Transition area
Buffer space
Work area
Termination area
What is a process variable?
A physical or chemical quantity that is usually measured and controlled in the operation of a water, wastewater or industrial treatment plant
What chemical is used to remove non-carbonate hardness in the chemical precipitation softening process
Sodium carbonate (soda ash)
