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Plumbing Level 3 > Self Test questions B3 / B4 > Flashcards

Self Test questions B3 / B4 Flashcards

1
Q

What is seen as being a downside to installing an automatic sprinkler system rather than water manully?

A

Cost of installation

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2
Q

What style of irrigation system is installed to water small, specific areas such as planters and hanging baskets?

A

drip

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3
Q

What is the service known as in BC that will send iinformation on any buried utilities to interested parties at no cost?

A

BC call 1

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4
Q

What is not need to be plotted on a site plan for a proposed irrigation system?

A

Gutter downspouts

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5
Q

What is the term given to the water that is used by the plant and lost into both air / soil?

A

Evapotranspiration

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6
Q

What can easily be used to determine the soil’s texture?

A

Jar test

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7
Q

What soil type is considered best for water absorption / retention?

A

Loam

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8
Q

What is most likely the result of applying water too fast to sloping ground?

A

runoff and erosion

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9
Q

If a 3-gallon pail take 18 seconds to fill, what would this be in GPM?

A

10

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10
Q

Would proximity to the house water supply be a consideration in the choice of location for mounting a residential timer/controller?

A

No

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11
Q

What type of sprinkler nozzle has almost no spray radius?

A

Bubbler

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12
Q

What type of sprinkler is best suited for small areas that may require many heads?

A

Fixed spray

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13
Q

What type of sprinkler is used in areas where there may be conflict with foot or vehicular traffic?

A

pop-up

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14
Q

What type of sprinkler has a paddle that “slaps” the water stream to cause the head to rotate?

A

Impact

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15
Q

What type of sprinkler is best for slopes / tight soils where lower precipitation rates are preferred?

A

Rotating

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16
Q

Is the ability to serve small areas an advantage of a rotating sprinkler over a spray sprinkler?

A

No

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17
Q

When plotting sprinklers on the site plan, what design aspect saves water / ensures its uniform application?

A

Use head-to-head coverage

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18
Q

According to industry standards, how much extra length should be added to the measured length to allow for friction loss through fittings in an irrigation system?

A

25%

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19
Q

What is the body size of most residential irrigation zone valves?

A

3/4” - 1”

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20
Q

What is the manufactures rule-of-thumb flow rate for 1” PVC SCH 40 pipe?

A

13GPM

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21
Q

What type of sprinkler system has its own backflow preventer built into it?

A

an anti-siphon zone valve

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22
Q

What 2 backflow preventers are normally specified by AHJ for installation on irrigation systems because of their ability to be in-line tested?

A

RPBAs and DCVAs

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23
Q

What is not an in0line testable backflow preventer?

A

DCAP

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24
Q

What is not a good location for a zone manifold?

A

driveway

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25
Q

What type of irrigation pipe has the most pressure drop, fewer fittings and required the least amount of trade knowledge to install but is most difficult to keep in alignment?

A

Polyethylene (PE)

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26
Q

What factors determine the number of zone valves needed?

A

Available GPM and sprinkler flow rates

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27
Q

What is the industry standard max velocity for pvc pipe used for irrigation systems so the friction loss is kept to a min?

A

5ft/sec (1.5m /sec)

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28
Q

Why does class 200 PVC allow more flow than SCH 40 PVC?

A

because of wall thickness difference

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29
Q

Electrical cables for irrigation zone valves must be?

A

acceptable for direct earth burial

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30
Q

What is the most common gauge of wire used for residential sprinkler systems?

A

18 AWG

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31
Q

What does Toro call their composite pipe used on barb fittings at sprinkler locations

A

funny pipe

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32
Q

When trenching through an existing lawn, what is a good way to min the amount of final cleanup required on the lawn?

A

Place the removed sod on plastic on one side of the trench, spoils on the other side also on plastic

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33
Q

What is a relatively easy way to get a pipe under an existing concrete sidewalk?

A

by jetting it

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34
Q

What type of connectors are used for writing at the zone valve locations?

A

waterproof twist on

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35
Q

What is the recommended method of flushing the zone piping (zone valve to sprinklers)?

A

Install all but the furthest head, open the valve and flush through the open end

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36
Q

How many stations should a controller by capable of operating?

A

at least 2 or more than are currently installed

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37
Q

If a lawn has sandy soil, what would be the most logical approach to programming the controller?

A

Set longer run times, decrease the number of cycles / day and increase watering days

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38
Q

If a well is used only for irrigation purposes, what feat does the controller need?

A

pump start relay

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39
Q

What characteristic of water that contains calcium / magnesium may cause the sprinklers to become plugged over time?

A

Hard water

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40
Q

Where in the system should a blowout connection for winterizing be installed?

A

Downstream of the backflow preventer

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41
Q

How should any ball valve be left after winterizing?

A

Half open

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42
Q

What is the most important aspect of the air supply used to winterize a system?

A

it’s volume

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43
Q

What are the only acceptable uses for non-potable water systems?

A

toilet flushing / underground irrigation

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44
Q

a harvested rainwater system is categorized in the plumbing codes as what type of system?

A

Auxiliary

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45
Q

What is the code requirement for interconnecting a potable water system with a non-potable water system?

A

They cannot be connected

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46
Q

Why is rainwater considered to be non-potable

A

It hasn’t been treated to acceptable certified standards

47
Q

What section of the plumbing code talks about harvesting rainwater?

A

Division B part2

48
Q

What is an acceptable catchment area for RWH system?

A

an asphalt shingle roof

49
Q

What is the max suggested slope on a gutter?

A

2.0%

50
Q

What type of pipe is preferred for underground conveyance piping?

A

PVC sch 40

51
Q

What is the preferred method for keeping underground conveyance piping from freezing?

A

Polystyrene foam insulation + adequate burial depth

52
Q

What is the horizontal conveyance pipe at the bottom of a leader known as?

A

a storm building drain

53
Q

Why is ABS pipe not suggested material for exposed conveyance piping?

A

Because it is not UV rated

54
Q

What tank placement options would require the approval of an engineer?

A

Forming a concrete tank as a component of the house foundation

55
Q

What tank material choices would provide the most strength and likely last the longest?

A

Concrete

56
Q

Who or what should be consulted when attempting to accurately determine an appropriate tank size for RWH system?

A

Tank manufacturers and suppliers

57
Q

What would be the most objectionable if choosing to install a plastic above ground RWH tank in a front yard?

A

Aesthetics

58
Q

What would likely incur little or no extra excavating costs?

A

an integrated tank

59
Q

What determines the height of the “dead space” in the bottom of a RWH tank?

A

the placement of the pump on/off switch

60
Q

What is the purpose of the “dead space” in a RWH storage tank?

A

to ensure the pump does not run dry

61
Q

What would be considered the best approach to ensuring a RWH tank that has to operate year round is protected from freezing?

A

install it and all related components below the frost level

62
Q

What is the strategy known as whereby potable water is added to the cistern to prevent the pump from running dry in times of little or no rain?

A

Make-up

63
Q

What is the primary concern regarding make up?

A

creating a CC

64
Q

What ensures there is enough water for use in a RHW system during periods of insufficient rainfall?

A

Top up

65
Q

What would the use of an air gap in a top up system be considered?

A

Zone isolation

66
Q

What protects the building occupants from the effects of a potential CC?

A

Zone isolation

67
Q

What would not be considered for the install of a backflow preventer on a water service at the property line?

A

Aethetics

68
Q

What is commonly used to operate a pump in a rainwater cistern?

A

a float switch

69
Q

what part of a RWH storage system is normally used to automatically add municipal water to the cistern?

A

a solenoid valve

70
Q

Where is the air gap for a make up water system located?

A

bn the solenoid valve / the cistern

71
Q

In a make up water system, when does the solenoid valve close?

A

When a sensor of float switch is activated at the highest water level desired

72
Q

What residential fixture is allowed to be connected to a RWH system?

A

a toilet

73
Q

What is not considered a method of pre-storage tx?

A

disinfection

74
Q

What water tx options involves the use of 2 compartment storage tank?

A

settling

75
Q

What involves the use of an orifice and chamber that makes water back up / exit through an outlet to a cistern?

A

First flush diversion

76
Q

What would only be used as a component of post-storage water tx?

A

disinfection

77
Q

Post-storage tx is normally only considered if the rainwater is to be used for?

A

potable purposes

78
Q

Why should overhanging branches or foliage be cleared away from above roof catchment areas?

A

It contributes to leaves / bird droppings contaminating the collected rainwater

79
Q

What would gutter guards be considered as?

A

a form of pre-storage treatment

80
Q

What is located in the basement of a home, draws water from the cistern / pressurizes it?

A

a jet pump

81
Q

What is likely the most important consideration of the RWH system’s distribution piping?

A

That it is clearly identified

82
Q

Pumps used in RWH systems are normally of what voltage values?

A

120/240 VAC

83
Q

What would be required if a 24 VAC sensor was expected to turn on a 120 VAC pump?

A

a relay

84
Q

What piece of equipment is installed to ensure that the pipe sizing doesn’t have to allow for enough flow for the toilets / sub-irrigation system to operate simultaneously?

A

a timer

85
Q

What would not be a consideration when sizing a submersible pump for a RWH pressure system?

A

suction head

86
Q

What type of pump is likely the most expensive, hardest for homeowner to understand the operation of and is therefore least likely to be chosen for a residential RWH?

A

A variable speed drive pump (has different flow rates at different pressures)

87
Q

What is the min suggested “run time” for a pump, as determined by manufactures?

A

1 - 2 min

88
Q

What is the mandated colour scheme for any piping or equipment that conveys non- potable?

A

purple

89
Q

How much physical separation must be mandated between buried potable / non-potable pipes?

A

min 300mm (12”)

90
Q

What is the practice of collecting / disposing of rainfall runoff in a responsible manner know as?

A

Storm water management

91
Q

NPC prohibits the direct connection of a RWH overflow to a storm sewer system, it may be allowed by the AHJ provided there is what installed bn the 2 systemss?

A

a backwater valve

92
Q

What is considered the easiest / most recommended option for a RWH system overflow?

A

Gravity drainage to grade

93
Q

what is considered the least recommended option?

A

pumped discharge to grade

94
Q

What is the only method of handling overflow from tank located in an underground parking garage?

A

pumped discharged to a storm sewer

95
Q

What is another term for a soakaway pit?

A

a drywell

96
Q

What type of soil is least suitable for the use of a soakaway pit?

A

Clay

97
Q

What type of tank would make overflow handling easiest but would encounter issues stemming from freezing / aesthetics?

A

Above grade

98
Q

What may a soakwaya pit required if the catchment area is very large and/or the soil is not sufficiently permeable

A

An overflow

99
Q

What is the definition of greywater?

A

Used water from laundries, bathtubs, showers and bathroom basins

100
Q

What are the permitted uses for greywater?

A

Flushing toilets, and urinals and subsurface irrigation

101
Q

What is the only allowable way to discharge greywater above ground?

A

by bucketing onto gardens or lawns

102
Q

If greywater is not intended to be stored and treated, it should be used for?

A

irrigation

103
Q

What can greywater be used for it a permit is not required?

A

greywater comes from only the clothes washer

104
Q

What would result is a permit is required for greywater

A

The greywater system uses a greywater tank

105
Q

When using a mulch basin to irrigate, how much water delivered laterally to roots through the soil?

A

by capillary action

106
Q

What test determines the infiltration capacity of soil where a permit is not required?

A

A soil ribbon test

107
Q

What type of test determines how well water drains from the property?

A

a percolation test

108
Q

What is the expected result of storing greywater for more than 24 hours?

A

a bad odour

109
Q

What device allows for switching bn the greywater system and the sewer system?

A

a diverter valve

110
Q

What type of greywater system usually needs no permits or inspections?

A

laundry to landscape

111
Q

What type of system relies on gravity, capillary action and soil microbes to distribute / process greywater in the landsccape?

A

Gravity, branched drain

112
Q

What type of self contained system would treat greywater so that it could be used for toilet flushing?

A

manufactured

113
Q

What is listen in the literature as being a system that would only be used where the expected daily amounts of greywater are very high?

A

Sand filter

Plumbing Level 3 (14 decks)

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