Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Plumbing Year 4 > Water F > Flashcards

Water F Flashcards

(72 cards)

Start Studying
1
Q

what indicates hardness in water

A

dissolved calcium and magnesium in the water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

what is the maximum pressure allowed at the fixture

A

550 kpa

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

when servicing a diaphragm flush valve what stops the flush cycle?

A

force in the upper chamber

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

what happens when a diaphragm flush valve finishes its cycle?

A

force in the upper chamber is higher then the lower chamber

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

which is a differential pressure backflow preventer?

A

RP

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

if a jet pump 2 pipe system is working close to lifting capacity, what options are available to you, to increase its capacity?

A

increase the suction side and drive line sizes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

which is allowed to drain into a septic tank?

A

garbage grinder

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

what CCC protection device is required for a shampoo sink?

A

vacuum breaker

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

what causes back siphonage?

A

a fire truck using a fire hydrant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what method is used for lowering 100’ submersible pump down with pvc piping?

A

a truck with well pump hoist

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

the horizontal water service from the well is back-graded from the pitless adaptor, what will this cause?

A

loss of prime

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

what is the main problem with high rise buildings using downfeed system?

A

balancing the hot water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what prevents back siphonage on a flush valve for a WC?

A

vacuum breaker

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what factors contribute to water’s ability to dissolve soluble material?

A

solubility of material,

time of contact

ph of water,

temperature of water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

when using a pressure tank without air/water separation, how do you remove or vent gases from the water in the tank?

A

air volume control

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

the process by which air is brought into intimate contact with water is known as:

A

aeration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

the process by which normal flow thru a filter bed is reversed, thus cleaning the bed is known as:

A

Backwashing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

a gas widely used to disinfect water is:

A

chlorine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

the amount of alkalinity present in water is normally measured by the:

A

PH scale

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

untreated water is known as ______ water:

A

raw

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

rainwater is normally:

a) corrosive
b) relatively soft
c) slightly acidic
d) all of the above

A

All of the above

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

the total hardness of water should not exceed _______ gpg in residential applications:

A

3.5 gpg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

water heater temperature should not be set higher than 140 deg F in order to prevent ______ Hardness from precipitating out of solution:

A

temporary

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

temperature, taste, odour, and turbidity are all considered _______ characteristics of water:

A

physical

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
soft water is considered to have a hardness of less than _______ gpg:
1 gpg
26
the iron content of water should not exceed:
0.3 ppm
27
the simplest method for removing iron (0.3ppm or less) from water is by the use of:
water softener
28
when using spring water as your source, how do you collect water and protect it from contamination?
an impoundment box around the spring
29
the acceptable ph range for potable water is:
6.5-8.5
30
a ph reading of 2.0 would be considered:
extremely acidic
31
water containing H2S in excess of _____ mg/l is considered to be aesthetically objectionable:
.05 mg/l
32
the best method for removing taste and odour problems from water is by the use of a:
activated carbon filter
33
the maximum amount of e coli permitted in potable water is:
0 ppm
34
waht type of treatment would a water softener be considered?
ion exchange
35
which type of treatment kills bacteria when used and installed correctly?
chlorination
36
reverse osmosis can be used to treat bacteriologic-ally unsafe water T or F
false
37
All piping downstream of a reverse osmosis unit must be plastic: T or F
True (its acidic)
38
which regeneration process provides fora better reserve in a water softener?
Up flow
39
what is the recommended length of a regeneration cycle for water softeners?
3 days
40
when sizing water softeners, 1 ppm of iron is equivalent to ______ gpg of hardness:
4
41
when sizing water softners, 1 ppm of manganese is equivalent to _____ ppm of hardness:
8
42
a water softener must always be installed ______ of a hot water heater:
upstream
43
what is one of the most common reasons of why a RO system will continuously run water down the drain?
the ASO valve is broken
44
a drilled well draws its water from an:
Aquifer
45
a residential well using a submersible pump would normally have a casing ______ inches in diamter:
4"
46
the distance in feet or meters that water lowers when being pumped is defined as:
drawdown
47
what is the minimum grade of PE pipe approved for use in a pump drop pipe:
series 160
48
a shallow well is normally defines as being no more than _______ feet
25'
49
which of the following determines when the pump starts and stops?
pressure switch
50
the most common type of pump used in the private water supply systems is:
centrifugal
51
according to your modules; each stage of a submersible pump will produce _____ psi:
9
52
what is the daily water requirement per person (US gal) used when sizing private water supply systems?
60 US Gal
53
a spring will alsways supply high quality water: T or F
high pressure
54
centrifugal pumps that are piped in series will result in:
increased pressure
55
the maximum practical lift at 2000 feet above sea level is:
23ft
56
the amount of pressure an impeller will produce is mainly a function of its:
diameter
57
the amount of flow an impeller will produce is mainly a function of its:
variable displacment
58
a pump what will produce 345 ft will develop a pressure of ______ psi:
multiply by .433 149.39
59
a centrifugal pump should cycle no more than _____ per hour
25
60
what type of pump would be best suited for a fuel transfer station:
diaphragm
61
what type of pump would be best suited for bodily fluids:
peristaltic
62
what type of pump is best suited for adding chlorine to a water system?
metering
63
a centrifugal pump works because of ________ principle:
bernoulli's
64
as high pressure enters the ejector of a jet pump, it passes thru the _____ and is converted to high velocity:
nozzle
65
what converts the high velocity water jet pump ejector to high pressure?
venturi
66
the larger of the two pipes on a deep well jet pump is the ______ line:
suction
67
a pressure expressed in terms of a height of column of fluid in feet is defined as:
head
68
what is the most likely cause of a pump turning on every time there is a demand for water?
pressure tank waterlogged
69
normal pressure switch for residential use are:
30-50 psi
70
a vacuum reading of 1"hg will lift water
1.13'
71
a vacuum gauge on the suction side of a running pump would show ___________ if the foor valve was stuck closed:
high vacuum
72
what prevents the water from draining out of the drop pipe when the jet pump stops running?
foot valve

Plumbing Year 4 (28 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions