REHS Learning checks Exam Questions with complete Answers 2024/2025
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Course
REHS
Institution
REHS
REHS Learning checks Exam Questions with complete Answers 2024/2025
Hydro pneumatic or pressure-tank water systems are suitable for: - correct answer small comm., housing dev, private homes, and estates, camps, food service ops and hotels
The hydro pneumatic tank typically contains ________ ...
REHS Learning checks Exam Questions
with complete Answers 2024/2025
Hydro pneumatic or pressure-tank water systems are suitable
for: - correct answer small comm., housing dev, private
homes, and estates, camps, food service ops and hotels
The hydro pneumatic tank typically contains ________ of its
volume as water. - correct answer 20%
Water containing nitrates generally indicates - correct answer
evidence of pollution
Diatomaceous earth filters - correct answer should be
augmented by chlorination
Hydrogen sulfide can be fatal at exposures of - correct answer
300ppm
The most practical method for removing nitrates from water is -
correct answer ion exchange
Which of the following is NOT a practical method for removal of
cadium? - correct answer Reverse osmosis
Back-siphonage may be prevented by all of the following
methods except - correct answer barometric loop ( those used
include air gaps,vac breakers, backpressure units)
,Of the following, which is not a variable to be considered when
deciding upon a safe distance between a well & sewage disposal
system? - correct answer The # of indv. utilizing the well
Microbial pollution travels only a short distance through -
correct answer sandy loam or clay
Typically, an abundant supply of groundwater may be yielded
from - correct answer sedimentary rocks
An example of surface water supply would be - correct answer
a reservoir
Which of the following is used to properly seal a drilled well to
prevent contamination of the water supply? - correct answer
grouting
Which of the following compounds would NOT contribute to
water hardness? - correct answer sodium chloride
The quiescent settling of water such as would occur in a
reservoir, lake or basin without the aid of chems is known as -
correct answer plain sedimentation
Which of the following is NOT a commonly accepted method or
device to prevent back-siphange (back flow) - correct answer
cross connections
, Which of the the following disinfecting compounds can be used
full strength for disinfection? - correct answer sodium
hypochlorite
The type of filterr that is recommended for use at small
communities and rural places is the - correct answer slow
sand filter
All of the following will generally vary directly with the quantity
of water used for domestic purposes expect - correct answer
amount of minerals in the water
Groundwater in the soil travels up through a plant's root system
and the comes out from the leaf structie as - correct answer
transpiration
The type of water that makes it difficult to produce suds or to
rinse laundry, dishes or food euip is - correct answer hard
water
A sanitary survey of a water system is necessary for what
reason? - correct answer to determine the safety and the
adequacy of the water supply
The sources of water supple are divided into which of the
following major classes? - correct answer ground and surface
water
The gas causing the distinct rotten egg oder in many water
sources is - correct answer hydrogen sulfide
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