Water License Part 1

Question 1

A confined aquifer containing groundwater under positive pressure is called
1. Flowing aquifer
2. Geologic aquifer
3. Artesian aquifer
4. Nubian aquifer

Answer 1

Artesian aquifer

Question 2

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

Answer 2

Packing ring

Question 3

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

Answer 3

Watts consumed

Question 4

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

Answer 4

Wet barrel

Question 5

When taking a storage facility out of service you must

1. have it back in service within 72 hours
2. coordinate and plan the shutdown so that the distribution system will be able to meet customer’s demands
   3.use a backup storage system
3. increase the water pressure to the system

Answer 5

coordinate and plan the shutdown so that the distribution system will be able to meet customer’s demands

Question 6

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

Answer 6

Prevent water from flowing in two directions

Question 7

Common method used to test water for chlorine residual

1.VOC
2.HTH
3.DPD
4.THM

Answer 7

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.

Question 8

What class of fire involves oil or grease?

Class B
Class A
Class D
Class C

Answer 8

Class B

Question 9

The most common location for a service connection leak is

1.Home plumbing
2.Pressure reducer
3.Gate valve
4.Curb stop

Answer 9

Curb stop

Question 10

What two chemicals cause hardness in water?

1.calcium and magnesium
2.oxygen and hydrogen
3.iron and manganese
4.lead and copper

Answer 10

calcium and magnesium

Question 11

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

Answer 11

Ammonia water

Question 12

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

Answer 12

Bacteria

Question 13

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

Answer 13

Tablet

Question 14

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)

Answer 14

insects and root damage

Question 15

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

Answer 15

Proportional

Question 16

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

Answer 16

Environmental Protection Agency

Question 17

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

Answer 17

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.

Question 18

Which type of pipe is typically used in the construction of very large water mains?

1.galvanized
2.PVC
3.asbestos-cement
4.steel

Answer 18

Steel

Question 19

What is the best valve for limiting a water hammer?

1.Pressure reducing
2.Pressure relief
3.Pinch
4.Needle

Answer 19

Pressure relief

Question 20

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

Answer 20

Remove hazardous gases

Question 21

What color should pipes containing reclaimed water be painted?

Blue
Purple
Red
Brown

Answer 21

Purple

Question 22

What is the best valve for throttling flow?

Globe
Ball
Gate
Butterfly

Answer 22

Globe

Question 23

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

Answer 23

Cast in place concrete

Question 24

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

Answer 24

air gap, RPZ, VB, and DCVA

Question 25

Pneumatic ejectors should not be used when the flow exceeds

10 GPM
500 GPM
100 GPM
200 GPM

Answer 25

100GPM