LEVEL 1 WATER DISTRIBUTION
PRACTICE TEST
The-minimum-and-maximum-chloride-residual-in-a-water-distribution-system-is-?---ans-
✔✔0.2-mg/l-and-4mg/L-of-free-chlorine
Nitrate-may-not-exceed-what-concentration-when-tested-yearly-for-a-groundwater-
treatment-plant-?---ans-✔✔10-mg/L
The-minimum-number-of-total-coliform-samples-that-must-be-collected-per-month-is-
based-on-Wich-of-the-following-?---ans-✔✔The-population-served-by-the-system
When-a-distribution-bacteriological-sample-is-positive-for-a-total-coliform-the-procedure-
is-?---ans-✔✔Repeat-the-sample-and-take-a-sample-5-connections-upstream-and-
downstream-to-confirm-total-coliform
For-lead-and-copper-sample-the-water-must-be-In-the-pipeline-for-at-least?---ans-✔✔6-
hours
What-is-hydraulic-grade-line-?---ans-✔✔A-line-to-which-the-water-level-would-rise-in-a-
small-,vertical-tube,connected-to-the-pipe
How-often-should-cathodic-protection-anodes-in-your-system-be-inspected?---ans-
✔✔Every-year
Water-pipelines-are-generally-designed-to-carry-water-at-a-velocity-below-?---ans-✔✔2.5b-
FPS.-Feet-per-second
Energy-use-in-water-systems-is-defined-best-by-?---ans-✔✔Energy-use-varies-among-
systems-and-an-energy-inventory-study-would-need-to-be-conducted-to-determine-
relationships
The-minimum-recommended-separation-distance-between-a-water-main-and-a-storm-
sewer-is-?---ans-✔✔6-feet
Which-of-the-following-should-be-in-an-organization-plan-?---ans-✔✔Identifies-clear-
lines-,defines-the-divisions-of-labor-,establishes-unity-of-command
, If-pipelines-are-not-restrained-using-steel-rods-concrete-thrust-blocks-can-be-used-at-?---
ans-✔✔Every-bend-and-transition
Engineering-Drawings-that-show-the-depth-of-pipe,-the-pipe-location-both-vertically-and-
horizontally-and-the-correct-distance-form-a-reference-point-are-known-as-which-of-the-
following---ans-✔✔Plan-and-profile-drawings
Which-are-the-components-of-directing-staff-?---ans-✔✔Motivating-&-communicating
The-accuracy-of-large-meters-should-fall-within-what-range-?---ans-✔✔Not-less-than-97%-
not-more-than-103%
In-some-older-water-system-lead-service-line-still-exist.-What-would-be-the-best-practice-
when-finding-lead-pipe-?---ans-✔✔Be-replaced
What-is-the-acceptable-range-for-water-loss-in-a-typical-municipal-distribution-system-that-
has-a-variety-of-pvc-and-di-pipe-?---ans-✔✔20%-(80%-effienciency)
What-is-a-major-cause-of-underground-construction-deaths-?---ans-✔✔Lack-of-shoring-or-
shoring-failure
If-the-tds-is-marginally-too-high-for-the-pump-the-likely-result-will-be-?---ans-✔✔Decrease-
in-flow-rate
Air-release-valves-are-installed-at-what-location-in-a-water-line-?---ans-✔✔At-high-points-
of-a-pipe-line
The-maximum-pressure-at-service-connections-should-be-less-than-?---ans-✔✔100-psi
In-selecting-and-Evaluating-a-tank,-storage-capacity-must-be-matched-_______of-the-
system-?---ans-✔✔Peak-demand
A-hydraulic-grade-line-will-always-slope-in-what-direction-?---ans-✔✔Slope-downward-in-
the-direction-of-the-water-flow
Where-does-the-majority-of-microbial-growth-with-in-a-water-distribution-system-occur-?---
ans-✔✔Dead-end-water-lines
Wells-that-are-biologically-contaminated-from-repeat-coliform-or-fecal-coliform-must-be-
bacteriologically-surveyed-and-sample-which-is-not-correct-?---ans-✔✔They-must-be-at-
least-12-hours-apart
When-backfilling-a-pipe-line-how-deep-should-the-first-layer-of-backfill-be-compacted---ans-
✔✔At-the-horizontal-centerline-of-the-pipe
PRACTICE TEST
The-minimum-and-maximum-chloride-residual-in-a-water-distribution-system-is-?---ans-
✔✔0.2-mg/l-and-4mg/L-of-free-chlorine
Nitrate-may-not-exceed-what-concentration-when-tested-yearly-for-a-groundwater-
treatment-plant-?---ans-✔✔10-mg/L
The-minimum-number-of-total-coliform-samples-that-must-be-collected-per-month-is-
based-on-Wich-of-the-following-?---ans-✔✔The-population-served-by-the-system
When-a-distribution-bacteriological-sample-is-positive-for-a-total-coliform-the-procedure-
is-?---ans-✔✔Repeat-the-sample-and-take-a-sample-5-connections-upstream-and-
downstream-to-confirm-total-coliform
For-lead-and-copper-sample-the-water-must-be-In-the-pipeline-for-at-least?---ans-✔✔6-
hours
What-is-hydraulic-grade-line-?---ans-✔✔A-line-to-which-the-water-level-would-rise-in-a-
small-,vertical-tube,connected-to-the-pipe
How-often-should-cathodic-protection-anodes-in-your-system-be-inspected?---ans-
✔✔Every-year
Water-pipelines-are-generally-designed-to-carry-water-at-a-velocity-below-?---ans-✔✔2.5b-
FPS.-Feet-per-second
Energy-use-in-water-systems-is-defined-best-by-?---ans-✔✔Energy-use-varies-among-
systems-and-an-energy-inventory-study-would-need-to-be-conducted-to-determine-
relationships
The-minimum-recommended-separation-distance-between-a-water-main-and-a-storm-
sewer-is-?---ans-✔✔6-feet
Which-of-the-following-should-be-in-an-organization-plan-?---ans-✔✔Identifies-clear-
lines-,defines-the-divisions-of-labor-,establishes-unity-of-command
, If-pipelines-are-not-restrained-using-steel-rods-concrete-thrust-blocks-can-be-used-at-?---
ans-✔✔Every-bend-and-transition
Engineering-Drawings-that-show-the-depth-of-pipe,-the-pipe-location-both-vertically-and-
horizontally-and-the-correct-distance-form-a-reference-point-are-known-as-which-of-the-
following---ans-✔✔Plan-and-profile-drawings
Which-are-the-components-of-directing-staff-?---ans-✔✔Motivating-&-communicating
The-accuracy-of-large-meters-should-fall-within-what-range-?---ans-✔✔Not-less-than-97%-
not-more-than-103%
In-some-older-water-system-lead-service-line-still-exist.-What-would-be-the-best-practice-
when-finding-lead-pipe-?---ans-✔✔Be-replaced
What-is-the-acceptable-range-for-water-loss-in-a-typical-municipal-distribution-system-that-
has-a-variety-of-pvc-and-di-pipe-?---ans-✔✔20%-(80%-effienciency)
What-is-a-major-cause-of-underground-construction-deaths-?---ans-✔✔Lack-of-shoring-or-
shoring-failure
If-the-tds-is-marginally-too-high-for-the-pump-the-likely-result-will-be-?---ans-✔✔Decrease-
in-flow-rate
Air-release-valves-are-installed-at-what-location-in-a-water-line-?---ans-✔✔At-high-points-
of-a-pipe-line
The-maximum-pressure-at-service-connections-should-be-less-than-?---ans-✔✔100-psi
In-selecting-and-Evaluating-a-tank,-storage-capacity-must-be-matched-_______of-the-
system-?---ans-✔✔Peak-demand
A-hydraulic-grade-line-will-always-slope-in-what-direction-?---ans-✔✔Slope-downward-in-
the-direction-of-the-water-flow
Where-does-the-majority-of-microbial-growth-with-in-a-water-distribution-system-occur-?---
ans-✔✔Dead-end-water-lines
Wells-that-are-biologically-contaminated-from-repeat-coliform-or-fecal-coliform-must-be-
bacteriologically-surveyed-and-sample-which-is-not-correct-?---ans-✔✔They-must-be-at-
least-12-hours-apart
When-backfilling-a-pipe-line-how-deep-should-the-first-layer-of-backfill-be-compacted---ans-
✔✔At-the-horizontal-centerline-of-the-pipe
