More Distribution Questions

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The purpose of the USEPA Ground Water Rule is to reduce disease incidence associated with disease-causing microorganisms in

A.  Drinking water
B.  Non-point sources
C.  Storm water
D.  Wastewater

Source:  USEPA Ground Water Rule, http://www.epa.gov/safewater/disinfection/gwr/regulation.html


The USEPA Ground Water Rule becomes effective on

A. December 1, 2009

B. July 1, 2010

C. December 1, 2010

D. July 1, 2011


Source:  Iowa Department of Natural Resources' Water Supply Listserv - November 10, 2009


What is the minimum recommended pressure in a water distribution system? What is this equivalent to in feet of head?


Chlorine ton cylinders at room temperature will deliver gas at a maximum rate of

      150 lb cylinders        Ton Containers

A.  10 pounds per day      100 pounds per day

B.  25 pounds per day      250 pounds per day

C.  40 pounds per day      450 pounds per day

D.  150 pounds per day    2000 pounds per day


Which of the following valves only permits flow to move in one direction?

A.  Butterfly

B.  Check

C.  Gate

D.  Plug


The specific gravity of chlorine gas is

A.  1

B.  Greater than 1

C.  Less than 1



1.    Calcium

A.  C

2.    Carbon

B.  S

3.    Chlorine

C.  P

4.    Copper

D.  K

5.    Fluorine

E.  O

6.    Iron

F.   Na

7.    Hydrogen

G.  N

8.    Lead

H.  Mg

9.    Magnesium

I.    Ca

10.  Manganese

J.   Cl

11.  Nitrogen

K.  Cu

12.  Potassium

L.   Mn

13.  Sodium

M.   Fe

14.  Oxygen

N.   H

15.  Phosphorus

O.   Pb

16.  Sulfur 

P.   Fl


Which of the following is correct?

A.  A is the follower and B is the lantern ring

B.  A is the lantern ring and B is a packing ring

C.  A is a packing ring and B is the lantern ring

D.  A is a packing ring and B is the follower


pH measures

A.  H+

B.  OH-

C.  O2

D.  Phosphorus


How do you know that your pump is cavitating?

A.  It doesn't sound right

B.  It runs hot

C.  It won't start

D.   All of the above


A chlorine atom is composed of

A.  Electrons

B.  Neutrons

C.  Protons

D.  All of the above


Throttling the discharge valve on a centrifugal pump will the likely ______ temperature of the motor and ______ the temperature of the pump

A.  Increase, increase

B.  Increase, reduce

C.  Reduce, increase

D.  Reduce, reduce


The chemical symbol for chlorine gas is

A.  Cl

B.  Cl-

C.  Cl2

D.  HOCl


Which of the following is the indicator used for pathogens?

A.  Amoebic dysentery

B.  E. coli

C.  Salmonella typhosa

D.  V. comma


Pump suction and discharge pressures are usually measured in

A.  gpm

B.  kWh  

C.  mg/L

D.  psi


Which of the following is the correct formula for chlorine in water?

A.  Cl2 + H2O → HOCl + HCl

B.  NaOCl + H2O → HOCl + NaOH

C.  Ca(OCl)2 + 2H2O → 2HOCl + Ca(OH)2

D.  HOCl → H+ + OCl-

E.  All of the above


The PE for flow is _____ gpcd.

A.  7.48

B.  8.34

C.  150

D.  250


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