Science and Math
The indicator organism that indicates the presence of fecal contamination.
What is E.coli
The meaning of GUDI
What is Groundwater Under the Influence of Surface Water
The primary use of aeration
What is to remove dissolved gases from liquids
The system that provides centralized control and real-time monitoring for water treatment plants.
What is the SCADA
The minimum treatment requirement for surface water and GUDI
What is chemically assisted filtration (or equivalent) and disinfection
The conversion factor for m3 to L
What is 1 m3 = 1000L
The continuous movement of water throughout the planet
What is the hydrological cycle
This is used to detect a chlorine gas leak
What is ammonia vapour
The valve that produces the least amount of head loss
What is the gate valve
The minimum safe level of oxygen in a space
What is 19%
Chlorine gas and carbon dioxide ______ the pH of water
The loss of pressure across a filter and happens as the filters clog up.
What is head loss
The difference between adsorption and absorption
What is adsorption is sticking to the surface of a substance, while absorption is being absorbed into a substance
The most likely cause of decreasing chlorine residual in a water main
What is the presence of bacteria and organics
The difference between E.coli and Total Coliform test results
What is E. coli indicates fecal contamination, while total coliforms represent the general effectiveness of treatment
The units in which resistance (R) is measured
What is ohms (Ω)
The radial distance from the center of a well bore to the point where there is no lowering of the table
What is the radius of influence (cone of depression)
These are formed when chlorine reacts with organic material
What are Trihalomethanes (THMs)
The primary function of couplings
What is to compensate for alignment changes
The three categories (or types) of samples
What is grab, composite, and continuous
What voltage produces a current of 500 amps with a resistance of 50 ohms?
What is 25,000V
Greensand filters use this to regenerate filter media
What is potassium permanganate
During breakpoint chlorination, this occurs after the breakpoint is reached
What is the free chlorine residual increases rapidly
This valve is found at the base of a water tower
What is a pressure relief valve
The frequency that an operator routinely inspect plant facilities for any evidence of a n unauthorized persons or unusual events
What is at least once per shift