WATER DISTRIBUTION PRACTICE
TEST D1 /D2
The-only-absolutely-reliable-method-of-backflow-prevention-is-the-use-of---ans-✔✔Air-Gap
The-bubbles-formed-in-a-positive-multiple-tube-fermentation-test-are---ans-✔✔Carbon-
Dioxide
The-maximum-rate-of-withdrawal-of-gas-from-a-150lb-chlorine-cylinder-in-24-hours-is---
ans-✔✔40-lbs
If-you-encounter-a-liquid-chlorine-leak-in-a-one-tone-container,-what-action-should-you-
take-first,-to-reduce-the-severity-of-the-leak?---ans-✔✔Rotate-the-container-to-place-the-
leak-at-the-top
The-most-commonly-used-water-disinfectant-in-the-United-States-is---ans-✔✔Chlorine
When-collecting-a-distribution-system-sample,-the-water-should-be-allowed-to-run-for-a-
period-of-time-prior-to-sample-collection.-How-long---ans-✔✔As-long-as-necessary-to-
permit-cleaning-of-service-line
Sample-bottles-wich-are-furnished-by-a-certified-laboratory-for-collection-of-bacteriological-
samples---ans-✔✔Are-ready-to-use
The-difference-between-water-pressure-upstream-and-downstream-of-a-pump-when-it-is-
not-in-operations-is-know-as-the---ans-✔✔Total-static-head
A-device-that-automatically-shuts-off-flow-in-an-elevated-storage-tank-when-the-water-
level-in-the-tank-reache-a-preset-level-is-termed-a---ans-✔✔Altitude-valve
In-an-occupied-trench-requiring-personal-egress-what-is-the-maximum-allowable-distance-
between-a-worker-and-an-exit-letter---ans-✔✔25-feet
A-water-bearing-formation-in-the-soil-is-referred-to-as---ans-✔✔An-aquifer
TEST D1 /D2
The-only-absolutely-reliable-method-of-backflow-prevention-is-the-use-of---ans-✔✔Air-Gap
The-bubbles-formed-in-a-positive-multiple-tube-fermentation-test-are---ans-✔✔Carbon-
Dioxide
The-maximum-rate-of-withdrawal-of-gas-from-a-150lb-chlorine-cylinder-in-24-hours-is---
ans-✔✔40-lbs
If-you-encounter-a-liquid-chlorine-leak-in-a-one-tone-container,-what-action-should-you-
take-first,-to-reduce-the-severity-of-the-leak?---ans-✔✔Rotate-the-container-to-place-the-
leak-at-the-top
The-most-commonly-used-water-disinfectant-in-the-United-States-is---ans-✔✔Chlorine
When-collecting-a-distribution-system-sample,-the-water-should-be-allowed-to-run-for-a-
period-of-time-prior-to-sample-collection.-How-long---ans-✔✔As-long-as-necessary-to-
permit-cleaning-of-service-line
Sample-bottles-wich-are-furnished-by-a-certified-laboratory-for-collection-of-bacteriological-
samples---ans-✔✔Are-ready-to-use
The-difference-between-water-pressure-upstream-and-downstream-of-a-pump-when-it-is-
not-in-operations-is-know-as-the---ans-✔✔Total-static-head
A-device-that-automatically-shuts-off-flow-in-an-elevated-storage-tank-when-the-water-
level-in-the-tank-reache-a-preset-level-is-termed-a---ans-✔✔Altitude-valve
In-an-occupied-trench-requiring-personal-egress-what-is-the-maximum-allowable-distance-
between-a-worker-and-an-exit-letter---ans-✔✔25-feet
A-water-bearing-formation-in-the-soil-is-referred-to-as---ans-✔✔An-aquifer
