Questions Bank pt. 1 Flashcards
May be used either for the collection of water without consideration of pressure, or for storing water under air pressure or under a static head for future concrete, stainless or plain steel.
Cistern / cistern tank
What is the best fixture for a public comfort room?
flushometer
What can discharge directly to the sewer system?
building sewer
Use of extreme water pressure so as not to affect existing foundation in the vicinity. It makes use of a suction pump above, while casing acts as the pump riser
jetted wells
Underground container for waster matter, a covered underground tank or well for the collection of waste matter and water, especially sewage.
sump pit
To ensure leakage, a G.I pipe when threaded has to use a lead liquid or tape around the thread before tightening the fittings
Teflon
There is a septic tank installed on the top of a rock by the seashore. The tank is exposed in low tide and covered in sea water during high tide. Which of the following would be an appropriate water proofing for it?
Water proof all surface, exterior and interior
It increases in energy converted to gain in pressure energy when the liquid is allowed to pass through an increase area.
dynamic
The volume of liquid passing through a cross section of a stream in unit time is called?
discharge
Instrument used to measure the water flow.
venturi meter
Pour index horsepower is how many foot pounds per minutes?
33,000
It is a tank that makes life easier for the well or booster pump by preventing rapid and unnecessary pump motor cycling
pressure tank
It is a valve the use a rubber gasket to shut off water flow and must be installed in the correct direction to work properly
stop valve
It may contain many trace minerals and chemicals, viruses and bacteria and may be classified as water which is harder than distilled water
soft water
These are advantages of vacuum system versus gravity system, except:
low maintenance required
These are disadvantages of vacuum system versus gravity system, except:
Always self-cleansing
Applicable join connection for asbestos cement pipe
mechanical joint
PE and PB pipes shall not be threaded
true
What is the main reason why globe valve is suitable for throttling services?
ball and gate valves tend to vibrate under flow, and erosion is concern when using gate valves
A valve usually used in high temperature services
ball valve
A valve usually used in high pressure services
globe valve
Where are dampers installed to regulate the amount of cool air for an even distribution to outlets?
at the branch supply duct as far as practical from the outlet
A tank constructed to special standards to withstand pressure and usually coated inside with corrosion resistant treatment as the water makes direct contact with the interior. The air compressed above the water.
air cushion tank
A kind of pressure vessel used in the hydropneumatic pressure system which water is totally confined in an elastic rubber bag. When water is pump the bag expands, compressing the air in the cylinder until the pressure switch reaches its setting and shuts off the motor
separated air cushion cylinder
What is the minimum distance between a tub spout and the flood level rim level of a tub?
6”
What is the maximum distance away from a water heater you can install a shut off valve?
1.5 m
The standard size of an outlet of a dry standpipe located for each floor is
64 mm (2 1/2”)
The general term for the hot or cold water pipes containing potable water
water distribution pipes
It is customary that a full open type of valve is used in several locations in a water distribution system. Which location in the following list does not require one?
on the main water distribution pipe near the water service
In a water system with constant water supply supplying series of plumbing fixtures, water supply drop is experience when the fixture in the series are simultaneously opened. Which poor design in the plumbing system causes this?
insufficiency in the size of the water service and distribution pipe
A type of check valve and placed at the pumps wet well
foot valve
It is the portion of the roadway section adjacent to the curb which utilized to convey storm water runoff.
gutter
To cause water or other liquid to percolate through something, so as to dissolve out soluble constituents
leach
The quality of galvanized iron pipes are rated by:
schedule
Liquid sewage t hat has been treated in a septic tank or sewage treatment plant
effluent
In RNPCP is the lowest portion of the interior part of any pipe of conduit that is not vertical
invert
How many gallons do an average daily consumption of a bathtub?
30 gallons
Fluoride as additive in water supply is a chemical for:
dental
Faucet fitted with nozzle curving downward used as a draw-off tap:
lavatory faucet
A flexible type pipe that is excellent in chemical and crush resistance has impact strength and flexibility and good low temperature performance. (black-bluish pipe).
polybuthylene
A flexible type of pipe known to have the only flexible plastic tubing suitable for use with hot and color water pressure system and it is also known as an excellent chemical resistance to acids and alkalis but is not suited for fuel oil, gasoline or kerosene distribution system. (blue or gray pipe)
polybutylene
In RNPCP, it is a metallic sleeve caulked or joined to an opening in a piping into which a plug is screwed that can be removed for cleaning the interior of the pipe.
ferrule
Common source of potable water in some rural areas
ground water
Theaters or movie houses’ water requirement is determined or estimated at 5 gallons of water per day per
total number of auditorium seat
A type of sewage disposal that has a vault constructed or concrete for the collection of raw sewage and a wooden shelter.
privy
A coupling device for connecting 2 pipes neither of which can be turned, consisting of two internally threaded end piece which are tightened around the pipes ends to be joined, and externally threaded center piece, which draws the two end piece together as it is rotated
union
A type of coupling or joining device having internal screw threads or nuts with opposite screws at the end. By turning the internal screws, it is possible to connect two metal rods and regulate the length and tension of this rods.
turnbuckle
The common ingredients for water disinfectant, except for?
bichlor
The sewage treatment process that involves the use of hydrochloride to kill pathogenic bacteria.
disinfection
How do we size sewage pits?
volume of liquid and solid waste
During site inspection, the architect notices that a soil pipe will cross a beam, what’s the best advice he can do?
simple ask to relocate, it’s just a pipe anyway
What is the most efficient tools for cutting cast iron pipe?
snap cutter
Minimum clearance from the floor of pipes for AC units when crossing a hallway or corridor
2.3
Where will you least place a downspout?
in between window openings
How could you differentiate between a soil and waste pip when laid side by side?
diameter
Where would you locate water distribution pipe farthest from?
large trees
Which wall is best suited if soil pip will run through it?
6” CHB
What is the standard water consumption (gallon/person/day) used in a 2 storey residence?
30-40
Alternative to conventional septic tank
aerobic treatment system
When water goes up through a vertical pipe, it stops at a certain height. Why?
the pressure inside the pipe equates to the pressure outside the pipe causing the water to stop at that point where it appears
The minimum size of a swimming pool drain?
2” dia
The minimum sized of a trap and waste branch for a size of foot bath?
2” dia
Which plumbing fixture does not have a water-saving feature?
flow limiting feature
What should not be permitted to cross a beam?
soil pipe
Can you embed a 4” diameter pipe in a 150 mm wall?
no
According to NBC, pipe support should be every
3 m
In high rise buildings, why is there a need to resize water supply pipes?
to use up the difference in pressure from the service to supply fixture
A sewage treatment that includes the exposure to air
aerator
Should not be use for a pipe chase?
dry wall
Where are storm sewer usually placed?
near the curb
Which is not a rule of a thumb when designing a drainage?
it should be underneath the driveway
Opening use to received pipes?
pipe chase
Copper pipes are classified as what main pipe?
ceramic
Best size of pipe connected to 5 sinks?
4”
What type of material is used for the base of a septic tank?
reinforced concrete
What do you call a water-tight receptacle used to store household waste?
septic vault
Type of permissible trap, except?
3/4 S traps
The prescribe color coding of piping under refrigerating division of all pipes, and fittings?
black
Standard water pressure from NAWASA?
60 psi
The legality of Revised Plumbing Code of the Philippines last 1999 was based on what Section or RA 13787
Sec. 4
Basic principles listed in RNPCP 1999 was based on what section of RA 1378?
Sec. 5
What is DAO #34 series of 1990 all about?
revised water usage/ classification water quality criteria
What is DAO 35 series of 1990 all about?
Revised Effluent Regulation of 1990
What is DOH Administrative Order 2007-2012 all about?
Phil. National Std. for Drinking Water 2007
According to Accessibility Law, urinals shall be of the wall hung and should have an elongated lip; the minimum height of the lip should be from the toilet floor
400 mm
In accordance with National Building Code, how much be the plumbing fee for plumbing installation of shower head in excess of one plumbing unit?
Php 2.00
In accordance with National Building Code, how much be the plumbing fee for plumbing installation of a dental cuspidor?
Php 4.00
According to Accessibility Law, the distance between centers of urinal to the wall for person with disability shall be?
460 mm
The quantity of sewage flow from a single-family dwelling per person is gpd
75
Who originally proposed using drainage fixture units to represent a fixture’s load-producing effect on the plumbing system?
Roy B. Hunter
What approximate percentage of new home construction employs a septic tank/ soil absorption sewage disposal system?
25%
Sewage pit connecting piping
should be laid at a minimum grade of 2%
A wye fitting has a catalog designation of 4 x 3 x 1 tee. What does the second number 3, indicate?
downstream size of main
Which common formula for calculating flow in pipes is meant for open-channel flow?
manning
The generally accepted pressure in a sanitary drainage system is
1 inch of water column
The drain lines for distributing the effluent from the septic tank should be spaced no greater than apart
6 ft
The absorption area to be provided for an individual residence containing 3 bedrooms with a percolation rate of 3 minutes is recommended to be
300 sq. ft
Centerlines are always used to indicate the center of the object. At most, you will find these as lines sued to show the center of a circular object. What is this line made of?
alternating long and short dashes
What drafting symbol can be used when a riser diagram becomes too long to fit in a single oage?
match line
These lines are thin and dark and are constructed with units of one long dash, followed by two short dashes. These lines indicate the scope of movement of a part has like showing the path a door will follow when opened
phantom lines
On what point of the pipe cross-section is the pipe’s elevation always referred to?
invert
It is a letter/ number designation assigned to each type of fixture
fixture label
These are dark and thick lines that indicates an object such as wall. These are the lines you will see when used to indicate the foundation and walls in the building as drawn in the plane
object line
Where is the best place to begin drawing a sanitary waste and vent riser diagram?
at the farthest point downstream on the main
These are thin, solid lines, that provide a stopping point for the pointed ends of dimension lines
extension line
What symbol that commonly appear on a domestic water riser diagram are not necessary to show on a sanitary riser?
direction arrow
What is the name of the washer that seals the bottom of
mack washer
What type of water close that has a small hole in the bottom that delivers water into the trap?
siphon jet water closet
In the change of direction of waste piping from vertical to horizontal, a long sweep or combination is utilized. From that point on the change of direction, it is recommended not to install any branch within the distance of 10 times the diameter of horizontal pipe. What is the reason behind why a branch should not be introduced?
due to presence of hydraulic pump
