SPDI2 Flashcards
What is the most important reason for backfilling a trench after pipe installation?
eliminate a safety hazard if left open
What wall thicknesses are available in copper tubing for drinking water?
K, L, M, DWV
Galvanization provides a pipe with what benefit?
Reduces corrosion
What fitting joins pipes so they can be taken apart later?
Union
How do street elbows and standard elbows differ?
Street elbows have one female and one male end
How do copper pressure fittings differ from copper drain, waste, and vent (DWV) fittings?
Pressure fittings have a deeper solder pocket
What is the smallest increment on most of the tape measures in our trade?
Sixteenth inch
What is the next largest sixteenth-inch mark after ¾?
13/16ths
What kind of tape measurer can you use to determine the travel when the offset angle is known to be 45 degrees?
plumbers rule
How do you determine the center of a fitting?
By finding where lines drawn through the fitting intersect
An end-to-center measurement is made from the?
End of pipe to center of fitting
When cutting tubing with a tubing cutter, how far do you turn the handle after each revolution?
1/4 turn
To remove the burr from inside a piece of pipe, operate the handle of the reamer with?
Short, even, clockwise strokes
What diameter steel pipe sizes are able to thread with a nonadjustable ratchet style hand threader?
1/8 - 2 inches
When threading steel pipe with a hand threader, how often do you apply oil to the pipe dies?
Apply oil every two or three downward strokes of the die handle
What is the purpose of oiling while threading the steel pipe?
Prevents the dies and threads from overheating and becoming damaged
When threading a fitting on a pipe, what happens if you overtighten a fitting?
The fitting stretches and the joint leaks
What size pipe wrench do you use on a ¼ inch pipe?
8 inch (200 mm)
What preparation must you make to produce a good bond between the base metal and the solder in a copper soldered joint?
The metal surfaces must be perfectly clean at the joint
How much solder is needed to solder a ½ inch connection?
1/2 inch
When using a lever type tubing bender, you can make angles up to how many degrees?
180 degrees
What action creates an watertight and airtight seal on a ferruled joint?
Tighten the nut which crimps the ferrule into the tubing and against the fitting
What is one disadvantage of the no-hub drainage system?
Support around the pipe may be required
When solvent welding plastic pipe, how do you insert the pipe into the fitting?
Quickly insert the pipe into the fitting with a onequarter turning motion
How is large underground plastic pipe joined?
O-ring joints
What are two types of pumps used in booster stations?
Deep well and split case
What is the reason we use elevated storage tanks in water systems?
Elevated storage tanks provide cheap pressure
What element of a water meter translates the action of the water flow?
Secondary
What is the minimum burial depth for water mains under roads?
3 feet (0.9 m)
What is the part of the water distribution system main and extends into the building?
Water service lines
Before a new water main is put into service it must be?
Tested and disinfected
A kind of cleanout plugs that will be installed in case where raised heads may cause hazards to passing personnel or vehicles.
Countersunk
If the water level in a fire hydrant barrel rises after the hydrant is shut off, then?
The main valve is leaking
What is the normal operating pressure of a water distribution system?
40 to 75 psi
Which instrument is used to measure velocity flow from a fire hydrant?
Pitot tube
After you have taken all the hydrant readings, you should shut down the hydrants slowly to?
Prevent surges in pressure
One of the factors to consider when sizing the supply for a building is type of?
Flush devices
To solder copper joints in a water distribution piping, you must not use solder containing?
More than 0.2 percent lead
How are the building water distribution branch lines normally installed?
Horizontally, with a slight grade toward the point of use
What device do you install in a building distribution system to correct a water hammer problem?
Vertical air chamber
The first step in the rough-in of fixtures is to locate the?
Exact position of the opening for each fixture
Where on the studs should you cut holes for water supply lines?
Center
To reinforce a structural beam that has been undercut?
Place a strap iron brace across the notch and fasten it with lag screws
When hanging steel pipe, place hangers no further apart than?
10 feet (3.0 m)
How many feet apart should 1 ½ inch diameter horizontal copper tubing be supported?
6 feet (1.8 m)
Lead pipe and tubing must be supported vertically every?
4 feet (1.2 m)
The primary purpose of periodic testing of water mains of flow and pressure is to ensure that?
Sufficient water is available for fire fighting
Who must be notified anytime a water main is turned off?
Fire department
How many times are pipes in the water systems tested?
Twice, after rough-in and after fixtures are installed
How much air pressure should you use for testing piping for leaks?
30 psi
What can you use as a substitute for soapy water when leak testing pipe during freezing weather?
Pine oil
When winterizing a system, what is the first step in draining a water system?
Close the main shutoff valve
Which antifreeze solution should be your first choice when you are protecting fixture traps against freezing?
Glycol
When using a torch to thaw frozen pipes near wooden structures, you must isolate the area with a ?
Fire shield
The best way to thaw short length of frozen pipe up to 1 ½ inches in diameter is to use?
Electric thawers
What is the proper way to tighten bolts on a full circle clamp?
Working from the center out
What type of repair clamp should be used as a temporary repair?
Emergency pipe clamp
When installing a compression coupling, why do you dig out the area to give you as much flexibility with the pipes?
To allow for easy installation
In which order is a water main disinfected?
Flushing, dosing, testing, flushing
What is the proper length of time and velocity for flushing a main?
30 minutes / 2.5 fps
Which disinfection method is preferred on new water mains because of its simplicity and ease of use?
Calcium hypochlorite tablets
What is the correct chlorine dosage and contact time for disinfecting a water main?
50 ppm / 12 hrs
What type of drainage system collects waste from rain and melting snow?
Storm sewer
At what intervals are manholes usually placed in sewer mains?
400 to 600 ft
What may happen if a sewer pipe is laid with a fall greater than ¼ inch per foot?
Waste water runs away from solids, eventually causing stoppages
What is the desired fall for a 3 inch house sewer?
¼ inch / foot
The proper fall for a house sewer is established by?
Establishing a grade line then digging the trench to exactly this line
In constructing a sewer main, when should you backfill the trench?
After you inspect the sewer pipe
It is caused by foreign objects like string or thread suspended over outlet arm of the trap.
Capillarity action
For best results how should you backfill a trench?
Backfill in layers of not more than 4 in and tamp with a mechanical tamper
The building sewer is usually made of clay tile, cast iron, asbestos cement?
Plastic pipe
What is the name of a short piece of pipe with a hub at one end and a straight cut or 45 degree cut on the other end that is used to tap into a sewer main?
Thimble
Which type of sewage lift station houses the pumps and motors in a different compartment than the one that receives the wastewater?
Dry pit
What are the two classes of drainage piping?
Soil and waste
Which type of drainage piping only conveys liquids that are free of fecal matter?
Vent
In a building drainage system, what is the definition of a stack?
Vertical pipe of a system of soil, waste, or vent piping that extends through one or more stories
How does a soil stack differ from a waste stack?
A soil stack carries the human fecal discharge of water closets, urinals, or other similar fixtures to the building drain; whereas, a waste stack carries waste that is free of fecal matter from all fixtures
What is used to determine the size of the stack after the fixture unit values have been totaled?
Stack table
When you install an individual vent, how many inches must the venting piping rise above the fixture flood rim before it changes direction?
6”
What is the minimum sized pipe that you can use for a wet vent?
1 ½ inches
How do you repair a leak on a plastic pipe fitting?
Cut fitting out and install new fitting
What are the primary means of inspecting and maintaining the sewer system?
Manholes
What is used to remove ice from a manhole cover?
Nonsparking tools
What should you do if an oxygen deficient condition is present in a manhole?
Ventilate it or use self-contained breathing apparatus
What is the correct method of disposal for discarded grease, fats, and oils?
Dump into oil/water separator
Chemical drain cleaners are appropriate when the drains are?
Flowing sluggishly
When do you perform recurring maintenance on a sewer main?
Annually
What propels the nozzle of a jet rodder throughout the length of a sewer line?
Reverse jet action of the nozzle
To repair a broken sewer main where should you block off the manhole?
Outlet side
What is used to find the location of fixtures in a building?
Plumbing blueprints and floor plans
What is the smallest drain used in lavatories?
1 ¼ inches
What is the size of trap used with the popup drain tailpiece?
1 ¼ inches
What is the name of the special tool designed to reach the hex jamnut beneath a fixture?
Basin wrench
What size supply is required for a flushometer type water closet?
1 inch
Tank water closets are preferred over flushometer water closets for residences because they?
Are less expensive
What is the smallest plastic drain that can accommodate a water closet?
3 inches
When specifications are not available, install the urinal so the lip height is?
20 to 25 inches above the finished floor line
What is the minimum size plastic waste pipe that you can use on a urinal?
2 inches
The tub overflow and drain assembly is not included in the rough-in piping for a bathtub because it is attached directly to the?
Tub at the time the tub is set
The distance between the floor and the drain board in a kitchen sink should be?
36 inches
What type of sink is used for dumping mop buckets and washing mops?
Service sinks
What is installed on fixtures to keep sewer gases from entering the building?
Traps
What is the water depth of a common seal trap?
4 inches
If a faucet closes with the pressure; not against it, the result is?
Easier operation and a tighter seal
What part of the body-unit faucet virtually eliminates maintenance of the faucet under normal operations?
Ceramic component
What does continuous dripping of a single or mixing faucet indicate?
Bad washer
Which shower/bath mixing valve is sensitive to both temperature and pressure?
Thermostatic mixing valve
What size water supply line is required for urinal flushometers?
¾ inch
What size water supply line is required for water closet flushometers?
1 inch
What are the two most commonly used flushometer valves?
Piston and diaphragm
How do you repair a water closet’s leaking flapper?
Replace flapper
A drinking fountain bubbler opening should be located above the drinking fountain rim a minimum of?
2 inches
Why must grease traps be installed in large military or commercial kitchens?
A properly installed trap will prevent stoppages caused by grease solidification
Where should a grease trap be installed?
As close to the fixture as possible, preferably inside the building
How is oil and water separated in oil water separators?
Physical and chemical
According to the stokes law of physics, approximately how many inches will a 100 micron diameter droplet of oil rise in water every 10 minutes?
6
On what type of as-built drawings are oil water separators located?
Mechanical
What is the normal working pressure of a gas water heater?
150 psi
A drop tube in a water heater causes the incoming cold water to mix with?
Stored hot water in the bottom of the tank
The drain cock with a hose connection at the bottom of a water heater is primarily used to?
Flush sediments out of the heater
The anode rod is installed in the top of water heaters to prevent corrosion?
Inside the tank
A domestic food grinder is designed to attach to drain with a diameter of
1 ½ inches
How is water allowed to enter an industrial food grinder?
Solenoid valve
What is the minimum size water supply for a drench type emergency shower and eye wash?
1 ¼ inches
According to Art 3.2.2.2 of PD 1096, What scope of work in plan preparation for new sanitary installation with more than 20 units does a sanitary engineer differs with a Registered Master Plumber?
Cost estimate
Screwed steel pipe 2 ½ inch diameter should have this number of threads for effective jointing.
8
Residential sink.
1.5
Laundry tub.
1.5
Shower bath.
2
Slop sink.
2
Sink (hotel or public).
2
Urinal.
1
Combination fixture.
2
One of the Code of Ethics for Master Plumber states, “Take advantage of a salaried _____ position to complete unfairly with a practicing Master Plumber.” What is the missing word?
Government
Fixtures outlet shall not be connected to the horizontal drainage within ____ of any vertical to horizontal change of direction of a stack containing suds-producing fixtures.
2.4m
Fixture unit values of a Slop sink.
3
It is the minimum pipe size for area drain.
4 inches
It is the recommended minimum pipe size P-trap floor drain.
3 inches
It is that portion of the horizontal drainage system which starts from the outer surface of the building and terminates at the main sewer in the street or septic tank.
House sewer
Is a receptacle used to catch surface water drained from cemented courts, driveways, and yards.
Yard catch basin
A group of fixtures consisting 1 wc, 1 or 2 lavatory, bathtub bath/shower, shower, urinal or bidet, emergency floor drain.
Bathroom group
The unobstructed vertical distance through the free atmosphere between the outlet of water pipe and the flood level rim of the receptacle into which it is discharging.
Air gap
It occurs due to an increased reverse pressure above the supply pressure.
Back pressure backflow
A house drain that receives discharges from industrial equipment that contain some objectionable acid wastes.
Industrial drain
Clean Air Act.
RA 8749
Provincial Water Utilities Act.
PD 198
Revised Fire Code of the Philippines 2008.
RA 9514
Water Code of the Philippines.
PD 1067
Clean Water Act.
RA 9275
Fixture unit value of a bathtub.
2
An act to regulate the practice of Sanitary Engineering in the Philippines.
RA 1364
Fixture unit value of a Floor drain.
2
A flange that closes the end of a pipe. There is no opening for the passage of air or liquid.
Blind flange
A plumbing fixture used for washing the middle private part of the body, especially the genitals.
Bidet
A valve opened and closed by the fall and rise respectively, of an attached ball floating on the surface of the liquid.
Ball valve
Civil Code of the Philippines.
RA 386
National Building Code of the Philippines.
PD 1096
It is called Back vent, Individual vent and?
Re-vent
It is called Common vent, Unit vent, and?
Dual vent
It is called Relief vent, Auxiliary vent, and?
Yoke vent
LPG, such as propane and butane, are odorized with compounds to allow leaks to be detected quickly. What is the common compound used as odorant?
Ethyl mercaptan
Power required to drive a centrifugal pump is directly proportional to _______ of its impeller.
Cube of diameter
You specified a standard 2” (51 mm) PVC pipe size for all the horizontal vent piping above the ceiling of the building you are designing. What is the maximum allowable length of these vent pipes as per code?
37m
The minimum water pressure in the main, after allowing friction and other pressure losses, before one needs to provide a hydro-pneumatic pressure tank or elevated water tank and booster pump to provide said pressure.
103kpa
According to the Fire Code of the Philippines, What is the required runs of dry standpipes system for purpose of draining?
20%
What is that receptacle attached to the plumbing system other than trap on which water or waste may be collected or retained for ultimate discharge into the drainage?
Catch basin
What is that vent pipe in plumbing that serves the building drain and building sewer?
SVTR
Is it a code to pipe an ejector pump waste line into a 4” (102 mm) horizontal?
FALSE 6”
When you install an ejector pump, in what order is it installed?
Pump, check valve, ball valve
What is the minimum distance between a tub spout and the flood rim level of the bath tub?
6”
Below what temperature is cold water?
85 degrees F
What temperature does a shower valve have to be set at?
115 degrees F
What temperature is considered hot water?
120 degrees F
How many water closets are allowed on a 3” horizontal waste line?
3
In a closed water system, is it applicable to install an expansion tank?
Yes
What is the maximum distance away from a water heater you can install a shutoff valve?
5ft (1.5m)
How many drainage fixture units (DFU’s) are allowed on a 2” (51 mm) horizontal drain line?
6
What is the distance from the top of a water heater to a relief valve?
6 inches (150 mm)
What is the minimum size vent for a water closet?
2
Under the Accessibility Law, what is the minimum area of water closet stalls?
1.7 x 1.8 m
For at least how many working days shall a required inspection of the building works be filed before such inspection be intended?
3 working days
What shall be issued by the Administrative Authority for the construction of a part of a large and/or complicated plumbing system before the entire plans and specifications for the whole system have been submitted or approved?
Partial permit
In order as not to impede the movement of a person in a wheelchair and to have a convenient access to the lavatory, what is the allowable knee recess vertical clearance that will be provided?
0.60 m to 0.70 m
What is the maximum length of the fire hose that shall be equipped on wet standpipes?
23 meters
NAMPAP is a professional organization of Registered Master Plumber under PRC. What is the PRC accreditation number of NAMPAP?
14
If the discharge of a fixture or drain may contain solids or semi-solids heavier than water that would be harmful to the drainage system or cause stoppage within the system, where the discharge must pass first?
Sand interceptor
In what year did NAMPAP was incorporated as a professional organization?
1935
A fitting for a lead-caulked joint that is prohibited when in vertical position.
double hub
Who shall set the criteria for the quality of drinking water from meteoric, surface, or underground sources?
National standard for dringking water
What is the minimum diameter of vent pipe allowed in the RNPCP?
1 1/4inches
What is the minimum total net inlet area of roof deck drains on roof deck used as sun decks and parking decks?
Equal to 2 times the area of outlet pipe
Which of the following is not included in a plumbing unit?
Water meter
What is the minimum pipe size of the standpipe if the highest outlet is located more than 23 m above the Fire Service connection?
6 inches
For the hot and cold water distribution system, on what side should the hot water supply be placed in combination fittings?
Left
Unless prohibited by structural conditions, what is the reference of each vertical vent pipe before offsetting horizontal to join the stack vent or vent stack?
Highest flood level rim of fixture
What provision does the design, construction, and operation of deep wells for the abstraction of groundwater will have to follow?
Water Code of the Philippines
To allow cleaning of the soil and waste line, each cleanout should be installed,
in the direction of flow
What kind of joint is not allowed in cast iron pipe?
Threaded
Drainage piping serving fixtures located below the crown level of the main sewer shall discharge into an approved watertight?
Sump
The minimum requirement for the slope of horizontal drainage pipes between manholes is,
2%
The area of the hole of the roof drain to effectively collect and drain rainwater in the roof is:
2 x the area of the drain pipe
The dome-type strainers for roof drain shall have a minimum total net inlet area of ________ to which it is connected.
1-1/2 x the area of outlet pipe
What are the primary materials suited for roof drains?
Cast iron and other corrosion-resistant materials
In terms of discharge, 1 FU represents the flow rate approximately:
7.48 gallons
The water service is a pipe that extends from the:
Water main to the water meter
Flushometer is another name for:
Flush valve
On most two-handle faucets, the stems:
rotate counter clockwise
PD 1095 prescribes that a dry standpipe is required for every building of how many floors?
4 stories or more
Dry standpipes shall have sufficient strength to withstand a water pressure of how much when ready for service?
20 kg/cm2
What do you call that point which is the unobstructed open edge of the fixture?
Rim
What type of end connection which is used for valves smaller than 2 inches in diameter?
Threaded
Which of the following is NOT a type of lavatory?
Reverse trap
What is the minimum depth of the building sewer when installed?
.3m
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
A building subdrain is located at what level?
Below the basement floor level
What is the minimum size of the fire hose outlet of an interior wet standpipe?
1 ½ inches in diameter
What is that system of arrangement of venting so installed that one vent will serve two traps?
Unit vent
What is the basic element of a cold water supply in a building?
Riser run outs
Which of the following is NOT a function of all faucets?
Level control
What is that controlled outlet in a pipeline used to discharge water or drain the system?
Blow-off
What is the prescribed color coding of piping under the Steam Division of a High-Pressure pipe?
Black
When heat is applied to water; molecular activity intensified and such particle expands in itself, followed by the change in behavior.
Increase the volume
Pipe materials used inside the buildings and premises shall conform to standard specifications set forth by this organization?
ASTM
What is that device used to prevent backflow whereby air is admitted to the supply pipe?
Vacuum breaker
What do you call that vents for fixtures intended to ventilate the foul odors and remove air from adjacent areas?
Local vent
The sanitary drainage system for public health reasons, must discharge to?
Public sewer system
A method of installation NOT allowed in a lateral to avoid pressure and retardation of the flow of waste water causing deposition of solid is?
Sharp curve
A vent that does not carry liquid or waterborne waste is called?
Dry vent
A vent which is also served as a drain is called?
Wet vent
A bacteria living or active in the absence of free oxygen is called?
Anaerobic
A secondary pipeline in sewerage a common sewer to which no other sewer is tributary is called?
Lateral
What is that device that operates automatically when refilling the water tank after each discharge and shutting off completely when the tank is already full?
Float valve
What is the vertical distance between the dip and crown weir of the trap?
Water trap seal
What do you call that process of removing the hardness causing minerals from water?
Water softening
Leaching field is categorized as one of the on-site efficient disposals for septic tanks. How far should be the minimum distance from shallow well to prevent contamination of water?
15.2m
What is the pipe connection in which a ball is held in a cup-like that allows movement in every direction?
Ball joint
How is water hardness measured?
Grains per gallon
What is that vent pipe in plumbing that serves the building drain and building sewer?
SVTR
The classification of water when it contains dissolved calcium salts and magnesium?
Hard
What is that vent pipe system on plumbing which liquid waste flow through?
Wet vent
What is the prescribed distance of vent from trap seal in plumbing installation?
1500 mm
What is the important advantage of chlorine compared to other water supply treatment?
Kills bacteria
The difference between a tube and a pipe is that the tube has relatively thin wall and _____.
The listed size corresponds to the outside diameter
What are used for disinfections large public water supplies?
Chlorine
The jelly-like substance being formed in the process of coagulation?
alum
The handicapped fixtures are usually designed for people with less physical ability than the general public. For the handicapped, what is the prescribed height of the toilet bowl?
450 mm
What is the pipe fitting with outside thread and projecting square head used for closing the edge of another fitting?
Plug
What is the process of exposing water in thin films to the oxygen of the atmosphere in order to remove or neutralize the taste, odor, and dissolved oxygen?
Aeration
What is the type of water closet prescribed for public toilet?
Elongated bowl type
What is the process of water supply purification which consists of applying certain chemicals in particles too small to be removed by plain sedimentation?
Coagulation
