Water License Part 1 Flashcards
A confined aquifer containing groundwater under positive pressure is called
1. Flowing aquifer
2. Geologic aquifer
3. Artesian aquifer
4. Nubian aquifer
Artesian aquifer
As the pump shaft protrudes through the pump case, a mesh ring can be placed and compressed to prevent excessive leakage. This ring is called the
1. Bearing ring
2. Packing ring
3 lantern ring
4. Mechanical ring
Packing ring
Electrical demand in a wiring system is determined by the amount of
1. Water pressure in the system
2. Voltage a system draws
3. Ohms in the entire system
4. Watts consumed
Watts consumed
Which type of hydrant has no main valve but has a separate valve for each nozzle
1. Breakaway
2. Warm climate
3. Wet barrel
4. Dry barrel
Wet barrel
When taking a storage facility out of service you must
- have it back in service within 72 hours
- coordinate and plan the shutdown so that the distribution system will be able to meet customer’s demands
3.use a backup storage system - increase the water pressure to the system
coordinate and plan the shutdown so that the distribution system will be able to meet customer’s demands
The purpose of a check valve is to
1.Prevent water from flowing in two directions
2.Reduce pump pressure
3.Prevent water hammer
4.Prime the water line
Prevent water from flowing in two directions
Common method used to test water for chlorine residual
1.VOC
2.HTH
3.DPD
4.THM
DPD
The most common colorimetric method used today is called the DPD Colorimetric Method. In this method, N,N-diethyl-p-phenyldiamine (DPD) is the reagent added to the sample. Chlorine oxidizes this DPD to form a magenta colored compound known as Wurster Dye.
What class of fire involves oil or grease?
Class B
Class A
Class D
Class C
Class B
The most common location for a service connection leak is
1.Home plumbing
2.Pressure reducer
3.Gate valve
4.Curb stop
Curb stop
What two chemicals cause hardness in water?
1.calcium and magnesium
2.oxygen and hydrogen
3.iron and manganese
4.lead and copper
calcium and magnesium
When a 150-pound chlorine cylinder fitting has a slight leak around the gasket material, a gauze like material soaked in _______ should be used below the fittings to confirm the leak.
1.oil
2.ammonia water
3.sodium thiosulfate
4.chlorine dioxide
Ammonia water
Red water is coming from a water main on Elm Street, but the water from all surrounding mains is clear. Lab tests show the water is not corrosive. Which of the following is the most likely cause?
1.scale build up
2.THM/HAA
3.water temperature
4.bacteria
Bacteria
To initially disinfect a pipeline, chlorine may be added to the water in a continuous flow, a slug, or
1.segmented
2.tablet
3.low dose
4.air injection
Tablet
Below ground storage tanks are vulnerable in having which of the following?
1.high pressures within the tank
2.insects and root damage
3.sunlight penetration that reduces chlorine residuals
4.high levels of total dissolved solids (TDS)
insects and root damage
Measures the total flow through a water line by multiplying the flow through the meter by a specific factor.
1.Current
2.Proportional
3.Insertion
4.Magnetic
Proportional
Which of the following sets the requirements for public notification?
1.National Rural Water Association
2.American Water Works Association
3.Department of Health and Environmental Control
4.Environmental Protection Agency
Environmental Protection Agency
The C-Factor relates to
1.the smoothness of the interior of a pipe
2.the elevation of energy head of water
3.a water service shutoff valve
4.the elevation of the invert of a pipeline
the smoothness of the interior of a pipe
The lower the C-factor the rougher the pipe. A low C-Factor causes increased friction loss.
A higher C-Factor represents a smoother pipe and lower friction loss.
Which type of pipe is typically used in the construction of very large water mains?
1.galvanized
2.PVC
3.asbestos-cement
4.steel
Steel
What is the best valve for limiting a water hammer?
1.Pressure reducing
2.Pressure relief
3.Pinch
4.Needle
Pressure relief
Why is it essential to ventilate a valve vault before entry?
1.Remove excess moisture
2.Equalize temperature and pressure
3.Eliminate foul odors
4.Remove hazardous gases
Remove hazardous gases
What color should pipes containing reclaimed water be painted?
Blue
Purple
Red
Brown
Purple
What is the best valve for throttling flow?
Globe
Ball
Gate
Butterfly
Globe
What type of concrete tank is constructed similar to a home basement, only with more reinforcement?
1.prestressed concrete wire-wound
2.circular prestressed concrete
3.cast-in-place concrete
4.hydraulically applied concrete lined
Cast in place concrete
Backflow prevention methods listed from most effective to least effective
air gap, VB, RPZ, and DCVA
air gap, RPZ, DCVA, and VB
air gap, VB, DCVA, and RPZ
air gap, RPZ, VB, and DCVA
air gap, RPZ, VB, and DCVA
Pneumatic ejectors should not be used when the flow exceeds
10 GPM
500 GPM
100 GPM
200 GPM
100GPM
