問題一覧
1
A pipe within the structure or on the premises which conveys water from the water service pipe or meter to the point of utilization
Water distribution pipe
2
The water service is a pipe that extends from the
Water main to the water meter
3
A receptacle attached to a plumbing system other than a trap in which water or waste may be collected for ultimate discharge into the plumbing system
Fixture
4
What is the minimum size of water supply for water closet flush valve type?
1 in
5
Flush meter is another name for:
Flush valve
6
Lavatories not affected by side walls, with effective opening not greater than 13 mm dia. Has minimum air gap of _____
25 mm
7
The top cover and the manhole of a septic tank usually extended above the surface of the ground to overcome surface water infiltration
5 cm
8
What type of end connections which are used for valves smaller than 2 inches in diameter?
Threaded
9
What is the prescribed color coding of piping under Steam Division of a high pressure pipe
White
10
Clean-out may be omitted on a horizontal drain line less than ____in length
1.50 m
11
What is that receptacle installed at corner wall that collect rain water from a balcony
Scupper drain
12
What is that device use to prevent backflow whereby air is admitted to the supply pipe whenever a vacuum occur?
Vacuum breaker
13
Each shower receptor shall be constructed to have a finished dam, curb or threshold of at least _____ mm lower that the outside floor.
25.4 mm
14
Dry standpipes shall have sufficient strength to withstand a water pressure of how much when ready for service?
20 kg/cm2
15
Shower head used in private has ___water supply fixture unit
2
16
What is the fixture unit of 18 storey dormitory building with 6 bathroom group on every floor with class 2
756
17
How does the safety features of a service hot water system works?
Automatically
18
What is the size of horizontal rainwater pipe with 2% slope if the max. rainfall is 100 mm on a 206 m 2
100 mm
19
Which of the following fitting is not recommended to be used in the change of direction in drainage line?
90 elbow
20
A plumbing fixture used for washing the middle part of the body, especially genitals. It is also known as the Sitz Bath.
Bidet
21
What is the size of downspout if the rainfall intensity is 100 mm Ɵ(4”) on a 1200 m2 deck roof
150 mm dia
22
Pipe materials used inside the buildings and premises shall conform to standard specifications set forth this organization?
American Society for Testing Materials (ASTM)
23
What vent pipe installation in the building which has no connection whatsoever with the plumbing fixture
Exhaust pipe
24
Roof deck strainers shall have a total net inlet area less than ______ times the area of the outlet pipe to which the drain is connected.
2
25
It is a compartment in the septic tank for the settlement of floating or suspended matters, sand debris and any excessive amount of grease or oil from sewage:
Sedimentation chamber
26
What is the depth of the building sewer when installed?
0.3 m
27
PD 1095 prescribes that dry standpipe is required for every building of how many floors?
4 storey or more
28
The area of hole of roof drain to effectively collect and drain rain water in roof is:
2 x the area of drain pipe
29
It is a loss of trap seal due to unequal atmospheric pressure condition and due to rapid flows of water thru the trap:
Siphonage
30
What happen when air comes into contact with wastewater in the drainage system
Dragged along with the fixture along the system
31
It is considered to be the most quiet, most efficient and most sanitary water closet.
Siphon vortex
32
A vent which also serve as a drain is called
Wet vent
33
What do you call that vents for fixtures intended to ventilate the foul odors and remove air from adjacent area?
Local vent
34
Water pipes shall laid a minimum of ______ above the sewer or drainpipe
0.30 mm
35
A pipe made from an alloy containing 85 percent and 15 percent zinc and generally used in local branch lines and in alteration to match existing work.
Brass pipe
36
A small concrete receptacle between the septic tank and the drain field in which lines of drain tiles extends and which acts as surge tank to distribute the flow of sewage equally to each line of drain tiles
Distribution box
37
For assembly places for public use, how many water closets are required if the capacity is 115 males?
2
38
Caulk joint shall be firmly packed with oakum or hemp and poured with pure lead, what is that depth of lead over oakum?
25 mm
39
What is the minimum size of fire hose outlet of an interior wet standpipe?
38 mm dia
40
This is less esthetic than aeration but more certain oxidation process. It is commolly used in cooling lower treatment and in addition ozonation has very wide range of treatment application
Ozonation
41
A pipe fitting, which is threaded on both the inside and the outside so that it can be used to connect two pipes (or other fittings) of different sizes.
Bushing
42
The trap provision required to restaurant and other establishment where sewage covers large amount of grease prior to discharge to sewer
Grease trap
43
That pipe which conveys waste water and water carried waste without fecal matter
Wadte pipe
44
Drains in gutters in public shower rooms shall be spaced not more than___ apart
4.9 m
45
Water supply wells shall be located at least _______ from building sewer
15.2 m
46
Minimum trap diameter for shower bath
51 mm
47
The least expensive but the noisiest water closet; only small amount of standing water-susceptible to fouling, staining and contamination.
Siphon washdown
48
In hospital wards, 1 bath tub or shower shall be provided per ____
20 patients
49
A building subdrain is located at what level?
Below the level of the public sewer
50
Galvanized wrought iron or galvanized steel pipe shall not be used underground and shall be kept at least ____ above ground.
152 mm
51
What do you call that point which is unobstructed open edge of the fixture?
Rim
52
What is the size of downspout if the rainfall intensity is 100 mm (4”) if the deck roof is 435 mm 2
100 mm dia
53
Minimum trap diameter for laundry tub
38 mm
54
What is that controlled outlet in a pipeline used to discharge water or drained the system
Blow-off
55
The minimum slope required for 102 mm diameter pipe or larger drainage piping
1%
56
What is the basic element of a cold water supply in a building?
Riser run outs
57
For assembly places for public use, how many urinals are required if the capacity is 115 males?
2
58
What is the recommended size of service pipe approved by MWSS for a 2 storey residential house?
¾” Ɵ - 19 mm
59
A bacteria living or active in the absence of free oxygen is called
Anaerobic
60
What is that system of arrangement of venting so installed that one vent will serve two traps?
Unit vent
61
Manhole in septic tank shall be provided with minimum dimension of _____
508 mm
62
All shower compartments shall have a minimum finished interior area ______sq.m
0.60 sq. m
63
Water closets shall be computed as ____fixture units when determining septic tank size
6
64
It is pipe which convey only liquid waste free from fecal matter
Wet vent
65
How do you measure the rainfall intensity?
Inches/ hr
66
The space between the liquid level line to the inside top cover of septic tank is called:
Airspace
67
Gate valve used in drainage work having a 102 mm diameter or larger shall have ____bodies
Cast iron
68
Which of the following is not a function of all faucets?
Level control
69
A method of installation not allowed in a lateral to avoid pressure and retardation of flow of waste water causing deposition of solid is
sharp curve
70
In term of discharge, one fixture unit represent the flow rate approximately:
7.48 gal
71
On most two-handle faucets, the stems:
Rotates clockwise & counterclockwise
72
A private plumbing system is composed of a flush tank water closet, a lavatory, a shower head and faucet. What is the total FU (water supply)?
9
73
The soil branch must be slope at a grade so that waste content is given a flow of pipe velocity to assure a self-scouring condition and lessen the possibility of seal loss stoppage and retarded flow:
¼ inch per foot
74
A plumbing fixture usually located in the operating room in a hospital to enable personnel to scrub their hands prior to a surgical procedure; the hot and cold water supply is activated by a knee-action mixing valve or by wrist or pedal control.
Scrub sink
75
When heat is applied to water; molecular activity intensified and such particle expand in itself, followed by the change in behavior
Increases the volume
76
No building water service pipe shall be less than _____in diameter
19 mm
77
It is a loss of trap seal due to suspension of foreign object such as string rugs or lint into the trap seal extending over the outlet arm of the trap:
Capillary attraction
78
It is the arrangement of venting so installed that one vent will serve two traps?
Unit vent
79
There shall be a minimum of ______drinking fountains per occupied floor in schools, theater, auditoriums, dormitories, offices or public building
1
80
Which of the following is not a type of lavatory?
Reverse trap
81
The cold-water supply is delivered into the hot water-tank by means of a boiler tube; this tube has a hole within 6 inches from the top of the tank, the purpose of which is to serve as:
dip tube
82
Cast iron fitting up to and including 51mm in size, when used in connection with potable water piping shall be_____
Galvanized
83
Clean-outs shall be provided at every ____ length or a fraction thereof
15 m
84
The connection of sewer service line into a sewer main is made by entering the sewer pipe at what point?
At the top of the sewer main
85
The sanitary drainage system for public health reason, must discharge to
Public sewer system
86
A septic tank is water tight receptacle for which sewage is digested than a biological action mainly by microorganism such as
Anaerobic bacteria
87
A secondary pipeline in sewerage a common sewer to which no other sewer is tributary is called
Lateral
88
A vent for a single fixtures or battery of fixtures which is connected into the same stack, is not which the fixtures discharge
Unit vent
89
What is required when cast iron pipe and fittings of different sizes are to be joined or connected?
An increaser or reducer
90
It is the pipe extension of a solid or waste stack above the highest horizontal drain connected to the stack
Stack vent thru roof
91
Normally, storm water sho
Ground water
92
It is a portion of the vent pipe through which liquid waste flow:
Wet vent
93
One fixture unit is equivalent to
1 cu.ft./min
94
what is the cause of object desirable taste and odor of water
algae
95
Vent opening shall terminate not less than ____ from any window, door or any opening
3.0 m
96
What is the term with reference to the load producing effect on the plumbing system for different kind of plumbing fixtures?
Fixture unit
97
How many lavatory shall be installed in a school with 240 male students
6
98
The retention period or the time for which suspended matters in septic tank would settle and stabilize is:
24 hrs