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114 Cards in this Set
- Front
- Back
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Where is the lantern ring located? |
Between packing rings on a pump shaft in the stuffing box |
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What does a lantern ring do? |
Provides a path for the lubricant to the packing. Keeps air out of the water stream. |
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Where are wear rings located? |
Between impellor and case housing |
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What do wear rings do? |
Isolate suction from impellor discharge |
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What type of pumps are frequently found in well houses? |
Submersible Pumps |
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What is suction head? |
How far above the water a pump sits |
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What is total dynamic head (TDH)? |
Vertical distance between the surface of the liquid to be pumped and the surface of the discharge tank. Plus the head loss in the suction and discharge lines and the remaining velocity head. |
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Why does every submersible pump have a check valve? |
So water doesn't run backwards |
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What type of applications are positive displacement pumps used for |
Chemical injection |
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How often should valves be operated? |
Once a year |
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What are jet pumps for? |
Small applications. Use water to push water. |
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What is a plant tap? |
Outside wellhouse 20-30ft |
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What is a raw tap? |
Raw samples taken here. Inside wellhouse. |
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What type of meter is typically in a wellhouse? |
Turbine meter |
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Drawdown |
Static level to pumping level |
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Reduced principle backflow preventer (RPZ) |
-high hazard situations -can be used to prevent back pressure and back syphonage |
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Where would you use butterfly valves? |
For isolation, regulating flow, and high flow conditions |
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What is the retention time for baseline lead and copper records? |
12 years |
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What is the retention time for chemical and radiological records? |
10 years |
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Who prepares an emergency response plan? |
Local officials |
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When should a bacteriological sample be to the lab and then the process of being analyzed? |
Within 24 hours |
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What type of pipe joints are connections are used in wellhouses or above ground? |
Flanged |
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How many well sources must a small community have? |
At least 2 |
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When there's contamination in a small system of 2000 people are less what kind of emergency action is required? |
Emergency chlorination |
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What is the most popular water meter for residential applications? |
Displacement or nutating disc |
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How can we protect ductal iron pipe from outside corrosion? |
Polyethylene wrap |
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What is the vertical and horizontal separation distance between water mains and sanitary sewers? |
18 inches vertical and 10 ft horizontal |
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How often should fire hydrants be inspected? |
Every 3 years |
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How often should your emergency response plan be updated? |
Every 3 years |
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How many feet should a ladder be above the rim of an excavation? |
3 ft |
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What is the proper spacing for valves in the distribution system? |
1,000 ft |
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How often should water distribution system valves be exercised? |
Annually |
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What is the isolation distance for wells |
200-ft radius |
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How long must we retain bacteriological and turbidity sample records? |
5 years |
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What is the MRDL for chlorine |
4 PPM |
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What type of cross connection device do you use on treated boiler systems? |
Reduce pressure backflow preventer (RPZ) |
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Coliform bacteria are organisms used for what purpose? |
Indicator organism |
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What is the dechlorinating agent used in bacti bottles? |
Sodium thiosulfate |
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How often must backflow devices be tested? |
Annually or once every three years depending on the hazard level |
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Air in the distribution system can cause what? |
Cloudy water |
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Should water meter be upstream or down the stream of a backflow device? |
Upstream |
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What is the minimum velocity for flushing water mains? |
2.5 ft per second |
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What state is the iron that creates red water and stains fixtures? |
Ferric state, ferrous iron is the suspended state |
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When is a consumer confidence report due each year? |
July 1st |
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What are the three types of chlorine compounds? |
Chlorine gas, sodium hypochlorite, calcium hypochlorite |
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What two conditions can cause a preferred differential at a cross connection? |
Back pressure or back siphonage |
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What is the capital improvement plan? |
Plan for expansions and the rehabilitation of utilities infrastructure |
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Langelier saturation index calculation, what is it and what does it determine? |
Calculated number used to predict the calcium carbonate stability in water. It indicates whether the water will precipitate, dissolve, or be an equilibrium with calcium carbonate |
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What is a heterophobic plate count and how does it relate to coliform count? |
High concentrations of HPC can indicate the presence of pathogenic bacteria when coliforms are not present |
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What type of plan includes the water source, treatment, mains, valves, and hydrant locations? |
Master plan |
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What type of problem is caused during a power failure and hypomatic tanks? |
Pressure loss |
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When do you need to notify people about a tier one violation? |
Within 24 hours |
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When do you need to notify people about a tier 2 violation? |
Within 30 days |
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When do you need to notify people about a tier 3 violation? |
Annually |
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What is the nitrite MCL |
1 |
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What is the nitrate MCL |
10 |
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What is the fluoride MCL |
4 |
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What is the arsenic MCL |
10PPB |
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What is the TTHM MCL |
80PPB |
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What is the HAA5 MCL |
60PPB |
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What can nitrates cause? |
Blue baby syndrome |
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How do you reduce disinfection byproducts? |
Lowering TOCs and flushing |
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Who is responsible to perform level 1 assessments? |
The water supply |
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Who is responsible for performing level 2 assessments? |
The DEQ |
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How long are bacteria samples held? |
30 hours |
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When chlorinating water mains in storage is what concentration and duration of chlorine do you use? |
50 parts per million for 24 hours |
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What is total capacity? |
Sum of all wells |
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What is firm capacity? |
The sum of all wells without counting the largest well |
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What type of fitting would you use for a river crossing? |
Ball and socket |
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What type of backflow device would you use for a high hazard situation? |
RPZ |
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True or false: vacuum breakers can withstand continuous pressure |
False |
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When would you use a double check valve? |
Low hazard situations only |
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What is containment? |
When you protect the water system at the service line |
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What is isolation? |
When you install multiple devices in the building at all cross connection points |
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When a trench reaches this depth you must use a ladder |
4 ft |
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A ladder must be found every ___ft in a trench |
25 |
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How far must a ladder extend outside of a hole? |
3 ft |
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What is burning in a class A fire? |
Wood, paper, trash |
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What is burning in a class B fire? |
Gas, oil, paint |
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What type of fire is a class c fire? |
Electrical |
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What is involved in a class D fire? |
Combustible metals |
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You pressure test water mains at ___PSI for ___ hours |
150 PSI, 2 hours |
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What is the typical c factor range in water mains? |
Between 80 and 140 |
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Where are the two classifications of valves? |
Rotary or linear |
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Should the bell on a water main be facing uphill or downhill? |
Uphill |
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What do anodes do? |
Give up electrons in the water main |
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What do cathodes do? |
Accept electrodes for the anode |
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What is peak hour demand? |
The highest water use for 1 hour in a given year |
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What is the ideal PSI in residential zones? |
50 to 75 |
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What is the ideal PSI in commercial districts? |
75 to 100 PSI |
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What is the bare minimum PSI during firefighting operations? |
20 PSI |
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Main and the distribution system should be no less than ___inches diameter |
6 |
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On a fire hydrant, how many inches above ground should the breakaway flange be m |
2 in |
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Where are globe valves typically found? |
Household water faucets |
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What is pitting of the impeller typically caused by? |
Cavitation |
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What is friction head? |
The amount of energy in feet require to overcome resistance to flow in a pipe |
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What is packing? |
Rings of graphite impregnated cotton, flax, or synthetic materials used to control pump shaft or valve stem leakage. In stuffing box. |
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What is a packing gland? |
A follower ring that compresses the packing placed in the stuffing box. The packing gland is tightened or loosened to control shaft leakage |
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What is housed in the stuffing box? |
Packing and The lantern Ring in a centrifugal pump |
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Where would you use a velocity pump? |
Booster stations |
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Where would you use a centrifugal pump? |
Lift stations |
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What does a volt measure? |
Measure of electrical pressure that can be compared to the measurement of water pressure |
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What does an ampere measure? |
The measure of electrical current flow through a conductor, similar to water through a pipe |
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What does an ohm measure? |
The measure of the conductor's resistance to current flow, similar to head loss in a pipe |
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What positively affects chlorination? |
Higher water temperature, lower pH, lower turbidity, higher dosage, longer contact time, lower tuberculation |
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How many times more dense than air is chlorine gas |
2.5 |
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What is tensile strength? |
The measure of how much resistance the material has to longitudinal pull |
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What is flexural strength? |
Measure of the pipe ability to flex without breaking |
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How much pressure must new main be able to withstand? |
2.5 to four times the normal operating pressure of the system |
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What is the public notification time for a Tier 1 violation? |
Immediate, within 24 hours. Must notify MDEQ |
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What is the notification time for a tier 2 violation? |
Asap, within 30 days |
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What is the notification time for a tier 3 violation? |
Within a year |
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What qualifies as a tier 1 violation? |
Exceed a MCL or MRDL, failure to treat, failure to moniter |
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When is the Consumer Confidence Report due? |
By July 1st annually |
