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CMC Test Preperation > Plumbing Code and Isometrics > Flashcards

Plumbing Code and Isometrics Flashcards

0
Q

Maximum static water pressure allowed for water distribution system? (40, 60, 80, 100 PSI)

A

80 PSI

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1
Q

Plumbing isometric diagram of two bay gas station. What is the size of drain line “I”?

A

3”

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2
Q

Given: 200 Lineal ft of 4” pipe at .75 cents per ft, 100’ Lineal Ft of 3” pipe at .55 cents per foot, and 75’ Lineal feet of 2” pipe at .25 cents per foot. If invoices is marked “2/10NET30”, what is the lowest cost of the PVC pipe?

A

$219.28

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3
Q

What is required to be installed prior to rough-in inspection?

A

All parts and actions that can be installed prior to installations of fixtures.

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4
Q

Minimum number of water closets for a dormitory with 200 females.

A

20

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5
Q

Minimum waste outlet for a sink?

A

1-1/2”

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6
Q

Minimum clearance for front of urinal?

A

21”

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7
Q

Maximum water pressure for relief valve on hot water heater?

A

150 PSI

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8
Q

Minimum distance from grade for F.D.C. (12, 18, 24, 36)

A

18”

NFPA 13

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9
Q

Which cannot be used in a building water distribution system?

A

PVC

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10
Q

Water system must be able to supply hot water to fixtures at least _____ Ft.

A

100 Ft

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11
Q

Critical level of atmospheric vacuum breaker must be a minimum ____” above flood level rim.

A

6”

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12
Q

What size of main drain is required for a 6” riser? (3/4, 1-1/4, 1-1/2 OR 2”)

A

2”

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13
Q

Single sanitary tees may be used in vertical drain lines only where direction of flow is horizontal to _____________.

A

vertical

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14
Q

A clean out at junctions of building drain and building sewer is not required if the clean out on a 3” or larger soil stacks if located with in a developed length of _______ feet.

A

10 Feet

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15
Q

Total DFU’s for 7 bathroom groups at 1.6 flush, clothes washer, 3 kitchen sinks, 2 lavatorys, 2 water closets at 1.6 flush. (51, 53, 58 and 59)

A

51

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16
Q

Pipe schedule indicates what?

A

Wall thickness

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17
Q

What is needed in a potable water line that delivers make up water to a hydronic boiler? Atmospheric ______-_______ __________________

A

Atmospheric back flow preventer

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18
Q

What is the minimum size trap for a sink?

A

1 1/2”

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19
Q

Minimum air gap for backflow preventer protecting sink with effective opening of 3/4”?

A

2-1/2”

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20
Q

Vent inlet vent for soil or waste pipe shall not be below the _____ of the trap.

A

The weir of the trap

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21
Q

Vent terminals may terminate within 10’ of window if it’s at least ____” above the top of the opening.

A

2”

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22
Q

Minimum size of wet vent for 3 DFU is…

A

2”

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23
Q

The diameter of a relief valve serving stack or more than 10 branch intervals shall be at least ________ to the size of the vent stack to which it connects.

A

equal to

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24
Q

Every fixture must have a water ______ _______.

A

water trap seal

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25
Q

What is the minimum pipe size for an air admittance valve used to vent a 1-1/2 horizontal branch? (1-1/4”, 1-1/2”, 2” or 2-1/2”)

A

1-1/2”

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26
Q

What is the minimum size vent for 3” pipe with 45 DFU Load, and a developed length of 72’?

A

2-1/2”

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27
Q

It is ok to have combination fixtures on one trap as long as outlets are not more than _____” apart.

A

30”

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28
Q

Pipe hangers and strapping material shall be of approved material that will not promote _________ action.

A

galvanic action

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29
Q

Water closets should be bolted to the floor with what kind of bolts?

A

Corrosion resistant bolts?

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30
Q

Water service pipe and building sewer pipe shall be separated by a minimum of how many inches above the top of the highest point of the sewer?

A

12”

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31
Q

Fixture supply shall not terminate more than how many inches from the point of connection to the fixture?

A

30”

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32
Q

Wastewater when discharged into the building drainage system shall be at a temperature not higher than how many degrees?

A

140 degrees

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33
Q

A public restroom had 6 public flush-o-meter tank water closets flushing at 1.6 gpf, 1 urinal and 5 lavatories. What is the DFU load?

A

33

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34
Q

All indirect waste piping that exceeds how many feet in total developed length shall be trapped?

A

4’

35
Q

Fixture trap seals shall not be subjected to a pneumatic pressure differential of more than how many inches of water column?

A

1”

36
Q

Every building in which plumbing is installed shall have at least 1 stack of not less than _____ of the required size of the building drain?

A

1/2

37
Q

What wet vent pipe size in inches should be used for DFU (Drainage Fixture Units)?

Hint: A wet vent is the vertical pvc pipe that connects below and directly to the sink p-trap

A

2”

38
Q

What is the diameter of a vent for a 3” stack with 45 fixture units that is 72” long?

Hint: The stack pipe is a larger pipe going from roof to drain which is larger than the vent pipe under the sink.

A

2”

39
Q

A single sanitary tee may be used in vertical drain lines only when the direction of flow is horizontal to _____________.

Hint: Think about PVC tee that has a curved offset in the middle. The tee is curved on the side instead of like a straight tee so that the drainage can run downward towards drain smoother.

A

vertical

40
Q

What type of valve shall not be used as a balancing valve? (Ball valve, Gate valve, Check valve, Globe valve)

A

Gate valve

Remember: Gate valves have to be turned like a wheel. There main benefit it that they seal tightly in the closed and open position.

41
Q

Drawing of a 2 or 3 story residential plumbing system with fixtures attached: Question asks what is A?

A

Horizontal Branch Drain

42
Q

The maximum # of urinals on a 10FT wall is ____.

A

3

43
Q

7 Bathroom groups flushing at 1.6 Gal
1 Clothes washer, 3 Kitchen sinks
2 Lavatories and 2 water closets at 1.6 Gal
(51, 53, 58, 59)

A

51

44
Q

What size is drain at capital I?

A

3”

45
Q

In plumbing subsoil drains, such drains shall not be less than ______” in diameter.

A

4”

46
Q

Where there is continuous water discharge into building storm drain or sewer, every gallon per minute of discharge shall be equivalent to 96 square feet of roof area, based on a rainfall rate of 1” per hour.

96GPM x 3 inch per hr of water = ______ square ft water coverage

A

288 Square Ft

47
Q

Regarding plumbing storm drains, scuppers shall not have an opening dimension of less than ______”.

A

4”

48
Q

Roof drains shall have strainers extending not less than _____” above the surface of the roof adjacent to the roof line.

A

4”

49
Q

Regarding plumbing traps, interceptors and separators, a combination plumbing fixture is permitted to be installed on one trap, provided that one compartment is not more than _______” deeper than the other compartment and the waste outlets are not more than _______” apart.

A

6” deeper

30” apart

50
Q

Regarding stack vents for plumbing, the air admittance shall be rated in accordance with the standard size of the vent to which the _______ is connected.

A

Valve

51
Q

Regarding plumbing vents, the size of the relief vent shall be equal to the size of the vent stack to which it connects.

Example, 3” vent stack connects to a ____” relief vent.

A

3”

52
Q

Regarding plumbing vents, any roof used for tanning or where people reside shall have vents at least _____ Ft above the roof.

A

7 Ft

53
Q

The plumbing system shall be provided with a system of vent piping that will permit the admission or emission of air so that the seal of any fixture trap shall not be subjected to a pneumatic pressure differential of more than _____” water column.

A

1”

54
Q

Regarding indirect/special waste, the air gap between the indirect waste pipe and the flood level rim of the waste receptor shall be a min of ______ the effective opening of the indirect waste pipe.

A

Twice

55
Q

Regarding indirect/special waste, all indirect waste piping that exceeds 2 ft in developed length measured horizontally, or _____ft in total length shall be trapped.

A

4 Ft

56
Q

Regarding sewers, a ________ valve and full open valve located on the discharge side of the check valve shall be installed in the pump or ejector discharge piping between it and the gravity drainage system.

A

Check valve

57
Q

Regarding sanitary drainage, clean outs on 6” and smaller pipes shall be provided with a clearance of not less than ______”.

A

18”

58
Q

The clean out at the junction of the building drain and building sewer shall not be required if the clean out on a 3” or larger soil stack is located within a developed length of _______Ft.

A

10 Ft

59
Q

For building sewers 8” and larger, _______________ shall be provided.

A

Manholes

60
Q

The minimum slope of a 3” horizontal drain shall be __/__” per ft.

A

1/8”

61
Q

A sanitary tee going from horizontal to vertical is _____.

A

Xc

62
Q

The potable supply to the boiler shall be equipped with a __________ ___________ with an intermediate atmospheric vent.

A

Back flow Preventer

63
Q

Regarding back flow prevention, the critical level of the vacuum breaker shall be set a min. of ______ inches above the flood level rim of the fixture.

A

6”

64
Q

In a back flow preventer, the pressure vacuum breaker assembly shall have a backsiphonage application size range of 1/2”- _____”.

A

2”

65
Q

“Lead free” solder shall mean a chemical composition equal to or less than ___.___% lead.

A

0.2%

66
Q

All hot water distribution pipe and tubing shall have a min. pressure rating of ______ psi at 180F. CPVC should also equal 100psi.

A

100psi

67
Q

All water service pipe or tubing, installed underground and outside of the structure shall have a min. working pressure of _____PSI.

A

160 PSI

68
Q

The minimum pipe size for a water closet or flush tank should be
___/___”.

A

3/8”

69
Q

The minimum size pipe size for a drinking fountain shall be ___/___”.

A

3/8”

70
Q

The flow rate for delivering water to a shower is _____ GPM.

A

3 GPM

71
Q

The required capacity for distributing water to a bathtub, the flow pressure should be _____ PSI.

A

8 PSI

72
Q

If a sewer is a min ______” above the top of the highest point of the sewer, the minimum 5 feet of distance from a water service pipe doesn’t apply.

A

12” above

73
Q

The minimum diameter of a water service pipe shall be __/__”.

A

3/4”

74
Q

With regards to a relief valve, the max temp setting is _____F and a pressure setting not exceeding the tank or water heater manufactures rated working pressure of _____ PSI.

A

210 F

150 PSI

75
Q

Water closets for public and employee toilet facilities shall be of the ____________ type.

A

Elongated

76
Q

Sinks shall be provided with a waste outlet a min of ___.___” in diameter.

A

1.5”

77
Q

The minimum distance between the outside toilet edge and closet wall is _______”.

A

15”

78
Q

Floor flanges for water closets or similar fixtures shall not be less than ___.___ inch thick for brass.

A

0.125”

79
Q

A residential one and two family dwelling has a min requirement of ____ bath group, ____ kitchen sink and ____ clothes washer connection.

A

1 bath group
1 kitchen sink
1 clothes washer

80
Q

The number of water closets (urinals) needed for residential dormatory of 200 students is _____.

A

20 urinals.

1 for every 10 people

20x10= 200

81
Q

The number of lavatories for an educational building of 1100 male students and 1200 female students shall be ______.

A

46 total

1 lavatory for every 50 students

50 divided by 2300 = 46

82
Q

The number of urinals/toilets needed for places of worship that has 300 men and 300 women should be…

A

6

4 toilets for women
2 urinals for men

83
Q

In a drainage and vent final test, all traps shall be filled with ________ and a smoke machine filled in plumbing pipes until smoke appears at stack opening on the roof. Then the stack openings shall be closed and a pressure equivalent to _____ inch water column shall be held for a min test period of ______ minutes.

A

water

15 minutes

84
Q

For drainage and water tests, an air test shall be made by forcing air into the system until there is a uniform pressure of ____PSI.

A

5 PSI

85
Q

The max. horizontal hanger spacing for steel pipe is _____Ft.

A

12 Ft

86
Q

The max. vertical hanger spacing for cast iron pipe is _____ ft.

A

15 ft

CMC Test Preperation (10 decks)

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