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These sample questions were published in the January, 1998 edition of DW&BP. The following questions were provided to DW&BP by the Backflow Prevention Institute. The information source for these questions was the USEPA Cross-Connection Control Manual, Appendix F - June 1989.

Please remember that these questions are Copyright © 1997 by Drinking Water & Backflow Prevention magazine - ALL RIGHTS RESERVED. Simply stated, any reproduction of these questions without the written permission of DW&BP is forbidden. This includes the use of these materials in any classroom or educational setting. We ask that you contact us at dwbp.magazine@drstuasaype.com if you have any question.

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— 1 — The flow of liquids from other sources into the potable distribution system is:

a) atmospheric pressure
 
b) backflow
 
c) backwater
 
d) cross connection
 
e) reduced pressure principle type

 

 

 

 

— 2 — A vacuum exists when the gauge pressure is:  

a) equal to absolute pressure
 
b) less than absolute pressure
 
c) equal to atmospheric pressure
 
d) greater than atmospheric pressure
 
e) less than atmospheric pressure  

 

 

 

 

 

 

 

— 3 — A water supply system includes the following except:

a) auxiliary supply
 
b) control valves
 
c) fittings
 
d) plumbing system
 
e) system piping
 

 

 

 

 

 

 

— 4 — The minimum effective opening of a discharge is used to determine a(n):

a) air-gap separation
 
b) critical level
 
c) flood-level rim
 
d) indirect connection
 
e) water outlet

 

 

 

 

 

— 5 — Potable water standards are established in the:

a) AWWA policy statements
 
b) Cross-Connection Control Manual
 
c) Primary Drinking Water Regulations
 
d) Safe Drinking Water Act
 
e) Uniform Plumbing Code
 

 

 

 

 

 

— 6 — An indirect waste pipe is described as:

a) direct cross connection
 
b) indirect cross connection
 
c) less than 2 inch diameter piping
 
d) not attached to the sanitary piping
 
e) submerged below the surface

 

 

 

 

 

— 7 — The surface of water exposed to atmosphere is described as:

a) absolute pressure
 
b) backflow connection
 
c) free water surface
 
d) system backflow
 
e) vented

 

 

 

 

 

 

 

— 8 — An potential connection of the potable piping to a source of contamination is a:

a) backwater valve
 
b) cross connection
 
c) distribution hazard
 
d) pump failure
 
e) vacuum relief

 

 

 

 

 

 

— 9 — Pumps can reduce pressure below atmospheric pressure resulting in:

a) backsiphonage
 
b) gauge pressure
 
c) terminal switch
 
d) thermal expansion
 
e) velocity decrease

 

 

 

 

 

 

— 10 — An air-gap separation is created when the supply piping is above the:

a) atmospheric pressure
 
b) drainage pipe
 
c) flood level rim
 
d) receiving vessel
 
e) tank capacity

 

(END OF EXAMINATION)

 

 

 

 

 

 

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