WATER DISTRIBUTION 1 QUESTIONS
AND ANSWERS
Head-is-measured-in---ans-✔✔feet
A-plat-is---ans-✔✔A-map
Which-type-of-valve-will-prevent-the-collapse-of-a-pipe---ans-✔✔Air-and-vaccume-relief-
valve
The-highest-degree-of-protection-of-a-coated-steel-pipe-is---ans-✔✔cathodic-protection
At-which-time-of-day-is-the-age-of-the-water-stored-in-the-distribution-system-the-highest?---
ans-✔✔In-the-morning
One-of-chlorines-advantages-is-that-it---ans-✔✔has-a-persistent-residual
Chlorine-gas-is-_____-times-heavier-than-air.---ans-✔✔2.5
After-a-water-storage-tank-has-been-chlorinated,-which-bacteriological-test-must-prove-
negative-before-the-tank-is-put-back-into-service.---ans-✔✔Coliform-test
Which-is-the-best-and-most-reliable-way-of-finding-a-very-small-chlorine-leak?---ans-
✔✔Use-a-chlorine-gas-detector-and-place-it-near-any-area-suspected-of-leaking.
The-minimum-required-free-chlorine-residual-anywhere-in-the-distribution-system-is---ans-
✔✔a-detectable-level
First-draw-samples-for-the-analysis-of-lead-and-copper-water-must-be-collected-from-taps-
where-the-water-has-stood-motionless-in-the-plumbing-for-at-least---ans-✔✔6-hours
Samples-collected-for-cloakrooms-are-collected-in-plastic-bottles-that-must-contain---ans-
✔✔Sodium-thiosulfate
The-volume-of-a-sample-for-coliform-compliance-is---ans-✔✔100-ml
, If-a-water-sample-is-not-analyzed-immediately-for-chlorine-residual,-it-is-acceptable-to-be-
analyzed-within---ans-✔✔15-minutes
The-heart-of-a-pump-is-called-the---ans-✔✔impeller
Which-device-serves-the-same-function-as-the-packing---ans-✔✔Mechanical-seal
Which-is-used-to-stop-air-leakage-into-the-casing-around-the-pump-shaft---ans-✔✔seals
Which-is-at-the-top-of-a-stuffing-box?---ans-✔✔Packing-gland
Which-assembly-holds-the-lantern-ring-and-packing?---ans-✔✔Stuffing-box
Why-is-it-important-to-monitor-the-speed-of-a-variable-speed-pump?---ans-✔✔To-prevent-
cavitation-from-occurring
Which-basic-electrical-unit-is-used-to-measure-a-materials-opposition-of-flow-of-
electricity?---ans-✔✔Ohm
The-first-oil-change-on-a-pump-should-be-done---ans-✔✔After-a-month-of-operation
How-often-should-the-temperature-of-centrifugal-pump-motor-bearings-be-checked-with-a-
thermometer?---ans-✔✔Once-a-month
All-sensors-that-respond-to-liquid-pressure-will-preform-poorly-if-_______-enters-the-air-
sensor---ans-✔✔Air
Which-agency-sets-limits-on-the-concentration-levels-of-harmful-contaminants-in-potable-
water-distributed-to-costumers?---ans-✔✔United-States-Environmental-Protection-Agency
Which-violations-are-most-serious?---ans-✔✔Tier-1
A-positive-fecal-coliform-test-must-be-reported-to-the-primacy-agency-within-24-hours---
ans-✔✔24-hours
The-number-of-monthly-distribution-system-bacteriological-samples-is-required-is---ans-
✔✔based-on-the-population-served
Which-is-the-approximate-angle-of-response-for-average-soils-when-using-the-sloping-
method-for-the-prevention-of-cave-ins?---ans-✔✔1.0-:-1.0
At-what-time-of-day-is-the-age-of-the-water-stored-in-a-distribution-system-the-lowest?---
ans-✔✔Late-Evening
Which-type-of-maps-should-not-overlap-each-other?---ans-✔✔Sectional-maps
AND ANSWERS
Head-is-measured-in---ans-✔✔feet
A-plat-is---ans-✔✔A-map
Which-type-of-valve-will-prevent-the-collapse-of-a-pipe---ans-✔✔Air-and-vaccume-relief-
valve
The-highest-degree-of-protection-of-a-coated-steel-pipe-is---ans-✔✔cathodic-protection
At-which-time-of-day-is-the-age-of-the-water-stored-in-the-distribution-system-the-highest?---
ans-✔✔In-the-morning
One-of-chlorines-advantages-is-that-it---ans-✔✔has-a-persistent-residual
Chlorine-gas-is-_____-times-heavier-than-air.---ans-✔✔2.5
After-a-water-storage-tank-has-been-chlorinated,-which-bacteriological-test-must-prove-
negative-before-the-tank-is-put-back-into-service.---ans-✔✔Coliform-test
Which-is-the-best-and-most-reliable-way-of-finding-a-very-small-chlorine-leak?---ans-
✔✔Use-a-chlorine-gas-detector-and-place-it-near-any-area-suspected-of-leaking.
The-minimum-required-free-chlorine-residual-anywhere-in-the-distribution-system-is---ans-
✔✔a-detectable-level
First-draw-samples-for-the-analysis-of-lead-and-copper-water-must-be-collected-from-taps-
where-the-water-has-stood-motionless-in-the-plumbing-for-at-least---ans-✔✔6-hours
Samples-collected-for-cloakrooms-are-collected-in-plastic-bottles-that-must-contain---ans-
✔✔Sodium-thiosulfate
The-volume-of-a-sample-for-coliform-compliance-is---ans-✔✔100-ml
, If-a-water-sample-is-not-analyzed-immediately-for-chlorine-residual,-it-is-acceptable-to-be-
analyzed-within---ans-✔✔15-minutes
The-heart-of-a-pump-is-called-the---ans-✔✔impeller
Which-device-serves-the-same-function-as-the-packing---ans-✔✔Mechanical-seal
Which-is-used-to-stop-air-leakage-into-the-casing-around-the-pump-shaft---ans-✔✔seals
Which-is-at-the-top-of-a-stuffing-box?---ans-✔✔Packing-gland
Which-assembly-holds-the-lantern-ring-and-packing?---ans-✔✔Stuffing-box
Why-is-it-important-to-monitor-the-speed-of-a-variable-speed-pump?---ans-✔✔To-prevent-
cavitation-from-occurring
Which-basic-electrical-unit-is-used-to-measure-a-materials-opposition-of-flow-of-
electricity?---ans-✔✔Ohm
The-first-oil-change-on-a-pump-should-be-done---ans-✔✔After-a-month-of-operation
How-often-should-the-temperature-of-centrifugal-pump-motor-bearings-be-checked-with-a-
thermometer?---ans-✔✔Once-a-month
All-sensors-that-respond-to-liquid-pressure-will-preform-poorly-if-_______-enters-the-air-
sensor---ans-✔✔Air
Which-agency-sets-limits-on-the-concentration-levels-of-harmful-contaminants-in-potable-
water-distributed-to-costumers?---ans-✔✔United-States-Environmental-Protection-Agency
Which-violations-are-most-serious?---ans-✔✔Tier-1
A-positive-fecal-coliform-test-must-be-reported-to-the-primacy-agency-within-24-hours---
ans-✔✔24-hours
The-number-of-monthly-distribution-system-bacteriological-samples-is-required-is---ans-
✔✔based-on-the-population-served
Which-is-the-approximate-angle-of-response-for-average-soils-when-using-the-sloping-
method-for-the-prevention-of-cave-ins?---ans-✔✔1.0-:-1.0
At-what-time-of-day-is-the-age-of-the-water-stored-in-a-distribution-system-the-lowest?---
ans-✔✔Late-Evening
Which-type-of-maps-should-not-overlap-each-other?---ans-✔✔Sectional-maps
