Distribution, storage, cross connection, meters

Unlike a grid system, an ___________ _______ system have large-diameter water mains encircling the service area.

Which type of water system can supply water from the most directions (four): arterial loop, grid, or tree?

The C-Factor is a coefficient that describes the pipe's...

The addition of tees and bends in the main will ______________ (increase/decrease) friction loss.

Ductile iron pipe is similar to cast iron pipe, except with centrifugal force during manufacturing and the addition of ______________ to the material.

What type of water main material is generally used for river crossings?

Which government agency regulates safety on the job for private-sector workers?

Which government agency regulates safety on the job for public-sector workers?

A trench of _____ feet or deeper requires a special protection system (trench box, shoring, benching).

_________ valves shouldn't be throttled for extended periods of time because the stopper/disc is subjected to abrasion in the water main and can lose functionality.

Gate valves 14" diameter and above are often installed with smaller by-pass valves to reduce the _______________ differential of the main when operating the valve.

Gate valves are used for which of the following: isolation or control?

Butterfly valves are used for which of the following: isolation or control?

A valve should be operated every _________ (range) years.

A hydrant should never be just partially opened because pressure can force water through the _______ _______ and erode away soil/thrust support around the hydrant base.

Hydrant grease must be ________-grade.

Hydrants in low-density residential areas require a minimum flow of ________ gpm.

Hydrants in high-density residential areas require a minimum flow of __________ gpm.

Hydrants must be spaced a maximum of ______________ (range) feet apart.

Hydrants should be operated a minimum of once every _______ years.

Hydrant valves should be operated a minimum of once every __________ (range) years.

The ideal flushing pressure when flushing hydrants is ______ psi (minimum fire flow pressure).

If fire flow pressure in a water system drops below _______ psi, public notice is required.

Minimum static pressure in a water system is _______ psi.

Maximum static pressure in a water system is _______ psi.

Without using commas, put these steps in the order that the DNR says s correct (even though it's not) for disinfecting water mains:
A - Disinfect/chlorinatemain and flush
B - Pass bacti sampling
C - Flush
D - Pressure test

Pressure tests must be conducted at ________ times the normal static/operating pressure of the water main.

Two safe bacti tests are required. One safe bacti test is also acceptable if, after the sample passes, the chlorine residual is tested and is at least ______ mg/L.

What is the primary method of corrosion control for water towers/storage reservoirs?

Cathodic protection is a method of preventing _____________ in a water storage facility.

Public notice is required if system pressure is lost in _____% or more of the distribution system.

Which type of current is more commonly used for thawing frozen water services: DC or AC?

Backflow comes in two forms: back-pressure and back-________________.

Back-__________________ can happen when there's a substantial a drop in pressure (negative pressure) in the distribution system.

Back-__________________ can happen when there's a substantial increase of pressure on the consumer end of the water service connection.

Which type of water meter is most accurate under consistently low-flow conditions: positive displacement or turbine?

Which type of water meter would you expect to find in a residential home: positive displacement, turbine, or compound?

Which type of water meter is most accurate under consistently high-flow conditions: positive displacement or turbine?

Which type of water meter would you expect to find in a well house: positive displacement or turbine?

Which type of water meter can be used for both low-flow and high-flow service connections: positive displacement, turbine, or compound?

Which type of water meter would you expect to find at a fire sprinkler system?

A __________ _________ provides electrical continuity and is required because houses are often grounded via their copper water services.

Per the DNR, what is the required test interval for 5/8", 3/4" and 1" meters?

Per the DNR, what is the required test interval for 1.5" and 2" meters?

Per the DNR, what is the required test interval for 3-4" meters?

Per the DNR, what is the required test interval for 6"+ meters?

Tests on positive displacement meters require _______ test flows.

Tests on turbine meters require _______ test flows.

Tests on compund meters require _______ test flows.