Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Plumbing > All Sections > Flashcards

All Sections Flashcards

1
Q

Should water service pipes be above sewage pipes?

A

Yes; 12 - 20 inches

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

what is the min size for water service piping

A

3/4 inch

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

where does galvanized steel first fail

A

threaded connections

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

should plastic be protected from the sun

A

yes

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

what are the 3 types of valves

A

globe
gate
ball

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

what is the function of the water pressure regulator

A

reduce water pressure to 50-60 psi

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

where is the location of the water pressure regulator

A

downstream of the main shut off

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

when is a water pressure regulator required

A

where muni water pressure may exceed 80 psi

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

when is a pressure relief valve needed

A

when there is no bypass

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

what are the 4 methods of making pipe connections

A
  1. soldered
  2. flare fitting
  3. joints
  4. compression fitting
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what is a dielectric union

A

used to joint two dissimilar metals

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

what is back pressure

A

downstream pressure > pressure in main

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

what is back siphonage

A

reverse flow of soiled water into potable water

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

what is a water hammer

A
  • loud banging sound in the pipe
  • occurs when a valve is shut off
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

what locations in a house can cross connections occur

A
  • fixtures
  • garden hoses
  • toilet tank
  • dishwasher
  • clothes washer
    lawn/sprinkler system
  • bidet
  • hot water boiler
  • swimming polo
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

what devices prevent backflow

A
  • air gap
  • atmospheric vacuum breaker
  • pressure-type vacuum breaker
  • dual check valve
  • double check valve assembly
  • reduced pressure principal device
  • backflow preventer
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what is a combination sewer

A
  • handles both sanitary & storm water
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

what is the ideal slope range for piping

A

1/8 to 1/2

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

what is the function of a trap

A

to prevent sewer odors entering the house

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

why should pipes downstream of a trap be horizontal

A

to maintain water velocity

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

what is a trap primer

A

whenever a fixture is used, a 3/8” diameter plastic tube drips water into the trap to maintain its seal

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

what is a wet vent

A

acts as a drain for one fixture and a vent for another

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

what is the difference b/w a soil stack & waste stack

A

soil stack carries solid, liquid, and air.
waste stack carries liquid and air

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

what are the functions of vents

A
  • allows air/odor in front of waste to escape
  • prevents vacuums forming behind waste
  • prevents siphoning of traps
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

the stack vent is an extension of what

A

waste stack

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

what is the ideal location for a vent

A

downstream of the trap by 2x the pipe diameter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

what is a crown vented trap

A

when the vent is too close to a trap. there is potential for waste to splash into the vent

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

what is the max distance a vent can be from a trap

A

5 feet

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

what is sway bracing

A

used to stabilize pipes where seismic activity is an issue

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
30
Q

what is galvanized steel good for

A

vent piping

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
31
Q

what does rust look like on copper

A

green

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
32
Q

how high should galvanized steel & cast iron piping be above grade

A

6 inches

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

what is min drain pipe size for toilets

A

3 inches

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
33
Q

what is the min trap size for sinks

A

1 1/2 inches

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

how many cleanouts should there be per horizontal drain

A

1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
34
Q

is welded steel permitted for piping

A

no

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
35
Q

how should a clothes washer be connected to a drainage pipe

A

by using a standpipe

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
36
Q

can condensate drain directly into a waste stack

A

no; potential for sewer gases to enter the house

37
Q

what is the function of water heaters

A

provide hot water at 49C

38
Q

what is a tempering valve

A

mixes cold water with hot water

39
Q

what is the typical capacity of a water heater storage tank

A

30-60 gallons

40
Q

what are the 4 types of water heaters

A
  1. oil-fired
  2. electric
  3. gas
    4, propane
41
Q

what material can a water heater be made of

A
  • copper
  • aluminum
  • copper alloy
  • nickel
  • plastic
42
Q

why are water heaters prone to corrosion

A

constantly use new waters which introduces corrosion causing oxygen

43
Q

what is the temperature range water heaters operate

A

49-60C

44
Q

what is a sacrificial anode

A

magnesium material that allows chemical reactions in the tank to attack it, instead of the tank

45
Q

what is a vacuum relief valve

A
  • located on the cold water inlet
  • avoids cross connections & tank collapse due to vacuum pressure
  • prevents hot water backing into cold water when the cold water pressure is low
46
Q

larger the burner…

A

faster the recovery rate = smaller the tank can be

47
Q

list the order recovery rate speed for water heater types from fastest to slowest

A
  1. oil
  2. gas
  3. electric
48
Q

what is the element sequencing for electric water heaters

A
  1. cold water drawn into the bottom prompts the lower element on
  2. once the hot water is depleted from the top, the top element takes priority and turns on
  3. once the upper element is satisfied, the lower element can turn back on
  4. both turn off once the target temp is reached
49
Q

what factors are used to rate a water heater

A
  • volume of water it can hold
  • size of the burner
50
Q

what are poor locations for a gas meter

A
  1. under a combustible stairwell
  2. in unvented locations
  3. < 3 ft from an ignition source
  4. under the drip line of a roof
51
Q

what material is not allowed for gas piping

A

PVC, ABS

52
Q

what is the function of a sediment trap

A

catch obstructions before it reaches mechanicals

53
Q

what is the drip leg function

A

collect moisture

54
Q

what is a Flammable vapor ignition resistant water heaters

A

Designed to prevent water heat burners from igniting vapor from gas & other flammable liquids

55
Q

why should vent connectors be as short as possible

A

make it easy of exhaust products to exit outdoors

56
Q

how much clearance should be given from water heater vents

A

6 inches unless a B vent is used

57
Q

how should manifolding be arranged with multiple exhausting systems

A
  • flue should connect one above the other
  • larger appliance should vent before the smaller one
58
Q

how far. away should oil storage tanks be from an oil water heater

A

atleast 10 ft

59
Q

what are some clues there is a buried oil tank

A
  • cant find one indoors
  • pipe w/ oil filter and/or shut off valve emerging from the foundation wall
  • fill pipe is not right next to the wall
60
Q

why should oil pipe lines be larger than plumbing pipe lines

A

in cold climates, fuel oil thickens & doesnt flow well

61
Q

what size pipe diameter is used for oil pipe lines

A

2 inch steel

62
Q

how far away should an oil burner be from combustibles

A

24 inches

63
Q

what is the function of the primary controller on an oil burner

A

ensure the burner has ignited; if it hasn’t ignited b/w 60-90 secs, will shut down

64
Q

how much should a vent connector slope until it reaches the chimney

A

1/4 inches uphill per foot

65
Q

what is max length of a vent connector

A

10 ft

66
Q

what is the clearance required for vent connectors from combustible material

A

9-18 inches

67
Q

how high should oil & gas water heaters be above the floor of a garage

A

18 inches

68
Q

how hot does water have to be to be considered superheated

A

100c

69
Q

what is the function of the temp/pressure relief valve

A
  • open & dump water out of the tank if the temp > 100C
  • open & dump water out if the tank is > 150psi
70
Q

when is a trap primer used

A

on infrequently used traps

71
Q

what is the min & max trap depth

A

1 1/2 - 2 inches

72
Q

when can a trap be below the floor for a kitchen island

A

if a 36 inch tailpiece is permitted

73
Q

what can be used for kitchen islands if a 36 inch tailpiece is not permitted

A

loop vent or circuit vent

74
Q

where are automatic trap primers located

A

on the cold water supply leading into the fixture

75
Q

what are the typical drainage times for basins, kitchen sinks, & bathtubs

A

Basins = 15-25 seconds
Kitchen sinks = 30-60 seconds
5 ft bathtub = 2-5 mins

76
Q

what are the functions vent piping

A
  • Equalize air pressure in the waste plumbing system
  • Allows air to escape so waste can move through the pipes
  • Allows air to be drawn in to prevent vacuums forming
77
Q

what is the ideal vent pipe arrangement downstream of the trap arm

A
  • run vertically until pipe is atleast 6 inches avove flood level of the fixture
78
Q

should vent piping be upstream or downstream of a trap

A

downstream

79
Q

what is the requirement for wet venting

A

fixtures must be on the same level

80
Q

what is the max length vent piping can extend beyond the roof

A

12 inches

81
Q

what is the function of sewer ejector pumps

A
  • Used when there are toilets below the sewer line
  • If waste cant flow to the sewer line by gravity, pumps are needed to lift the waste to the sewer
82
Q

what is the function of a sump pump

A

Handle rain & snow that accumulate around the building

83
Q

what is the function of a laundry tub pump

A

Used when the laundry is below the elevation of the sewer

84
Q

what materials are not allowed in basins, sinks, laundry tubs

A

wood
concrete
tile

85
Q

what type of faucet is prone to water hammer

A

washerless faucets

86
Q

what is the function of pressure balancing valves

A
  • Sense the drop in pressure on the hot or cold side & reduce the pressure by the same amount on the other side
  • Temp stays the same
  • Pressure will drop
87
Q

what is the function of stop & waste valves

A
  • Prevents water from sitting where the pipe will freeze
  • Isolates the through-wall section of pipe & drains the water out through the waste valve
88
Q

what are the 2 types of flushing mechanisms for toilets

A
  1. siphon vortex
  2. siphon jet
89
Q

what are the recommended clearances for toilets

A
  • 15-18 inches clearance on both sides from the centre line of the toilet
  • 21-24 inch clearance in front
90
Q

what prevents the cross connection issue with bidets

A

vacuum breaker

91
Q

how far away should light switches be from the bathtub

A

Atleast 3 ft away

92
Q

how far away should light fixtures be from a bathtub

A

8 ft above the top of the tub
3 ft away horizontally

Plumbing (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions