Backflow Prevention and Cross Connection Control.pdf

Backflow Prevention and Cross Conne
a/ a/ a/ a/




ction Control a/




Reliefa/valvea/dischargesa/continuously.a/Problema/Maya/bea/causeda/bya/whata/5a/faults?a/-
correcta/answer✔ ✔ 1.a/Faultya/No.a/1a/checka/valvea/(F1CV)
a/


2.a/Faultya/No.a/2a/checka/valvea/witha/backpressurea/(F2CVwB)a/
3.a/Faultya/reliefa/valvea/(FRV)
4.a/Reliefa/valvea/pluggeda/sensinga/|ine(s)a/(RVPSL)
5.a/Reliefa/Valvea/leakinga/diaphragma/(RVLD)


Reliefa/valvea/dischargesa/intermittently.a/Problema/Maya/bea/causeda/bya/whata/4a/faults?a/-
correcta/answer✔ ✔
a/


1.a/Properlya/workinga/assemblya/witha/largea/pressurea/fluctuations
2.a/No.1a/checka/valvea/readinga/isa/closea/toa/RVa/openinga/point,a/witha/smalla/linea/pressure
fluctuation.
a/

3.a/Watera/hammer
4.a/No.a/1a/checka/valvea/leaka/witha/intermittenta/flowa/througha/assembly.


Duringa/RPa/Testa/1,a/Reliefa/Valvea/dischargesa/aftera/No.a/2a/shutoffa/valvea/isa/closed.a/Wh
ata/doesa/thisa/indicate?a/-a/correcta/answer✔ ✔
1.a/Normallya/indicatesa/faultya/No.a/1a/checka/valve
•a/Dirtya/ora/damageda/disc
•a/Dirtya/ora/damageda/seat:a/or,a/
2.a/Leaka/througha/reliefa/valvea/diaphragm


Duringa/RPa/Testa/1,a/Reliefa/valvea/woulda/nota/open;a/differentiala/ona/thea/fielda/testa/kita/wo
ulda/nota/drop.a/Whata/doesa/thisa/indicate?a/-a/correcta/answer✔ ✔
1.a/Leakya/No.a/2a/shutoffa/valvea/witha/flowa/througha/thea/assemblya/(L2SVwF)

, Duringa/RPa/Testa/1,a/Reliefa/valvea/woulda/nota/open,a/differentiala/dropsa/toa/zero.a/Whata/do
esa/thisa/indicate?a/-a/correcta/answer✔ ✔
1.a/Reliefa/valvea/stucka/closeda/duea/toa/corrosiona/ora/scalea/(RVSC).
2.a/Reliefa/valvea/sensinga/line(s)a/plugged.


Duringa/RPa/Testa/1,a/Reliefa/valvea/opensa/tooa/higha/(witha/sufficientlya/higha/No.a/1a/checka/
reading).a/Whata/doesa/thisa/indicate?a/-a/correcta/answer✔ ✔ 1.a/Faultya/reliefa/valve
•a/Dirtya/ora/damageda/disc
•a/Dirtya/ora/damageda/seat


Duringa/RPa/Testa/1a/ora/3,a/Checka/Valvea/No.a/1a/checka/readinga/tooa/lowa/(lessa/thana/5.0).
Whata/doesa/thisa/indicate?a/-a/correcta/answer✔ ✔ 1.a/Dirtya/ora/damageda/disc
a/


2.a/Dirtya/ora/damageda/seat
3.a/Guidea/membersa/hanginga/up
4.a/Damageda/spring


Duringa/RPa/Testa/2,a/Checka/Valvea/No.a/2a/isa/Leaking.a/Whata/doesa/thisa/indicate?a/-
correcta/answer✔ ✔ 1.a/Dirtya/ora/damageda/CVa/2a/disc
a/


2.a/Dirtya/ora/damageda/CVa/2a/seat
3.a/CV2a/guidea/membersa/hanginga/up
NOTE:a/Lubricantsa/shoulda/onlya/bea/useda/toa/assista/witha/thea/reassemblya/ofa/componen
ts,a/anda/musta/bea/non-toxic.


Duringa/DCa/Testa/fora/eithera/checka/valve,a/thea/Checka/valvea/isa/readinga/belowa/1.0a/psid.
Whata/doesa/thisa/indicate?a/-a/correcta/answer✔ ✔ 1.a/Dirtya/ora/damageda/checka/disc
a/


2.a/Dirtya/ora/damageda/checka/seat
3.a/Damageda/spring