UTB3 Fundamentals of Water Distribution Flashcards
What type of cleaning solution is used to clear mineral deposit build up within the water distribution piping?
Muriatic acid
When laying water distribution piping underground how far above or below must the piping be from sewer piping?
1 foot above and 10 feet away
Water storage tanks are made of what two materials?
Concrete and steel
Which of the following flexible connections is commonly used with a galvanized steel service line?
Swing joint
When installing a service sink, what is the minimum flow pressure value needed?
8 psi
Drinking water is also known as what?
Potable
Water for consumption is obtained from how many different sources?
3
What is the most common source of water?
Well water
How deep is a dug well excavated to?
30 feet
What is utilized to transfer water from a low elevation to a higher elevation?
Lift stations
Which of the following BPS systems is used to transfer water to a higher pressure zone closed to the atmosphere?
Closed BPS
Pipelines containing unsafe water are painted what color?
RED
What type of system is used to prevent stagnated water from accumulating in the piping?
Loop
When self induced electric current flows from the metal into the soil, this is known as what condition?
Corrosion
How many different types of corrosion are associated with water systems?
3
Galvanic
Atmospheric
Concentration cell
Atmospheric corrosion normally occurs in which type of piping systems?
Aboveground
Which of the following terms is NOT a term used to refer to concentration cell corrosion? A. Crevice corrosion B. Gasket corrosion C. Electrolyte corrosion D. Deposit corrosion
C. Electrolyte corrosion
What is the most common type of protective coating used in corrosion control?
Asphalt
What are the two types of cathodic protection process?
Impressed current and sacrificial anode
When utilizing the sacrificial anode system on a long pipeline, what is the minimum distance between anodes?
40
The impressed current system is designed to protect what type of system?
Water supply pipelines
Noise in water pipes is indicative of what faulty condition?
Structural support failure
What is the minimum size diameter of a water main line?
6”
Which type of valve is used to control water by throttling?
Globe
How many different soil classifications are used to determine excavation and entry approaches for trenching?
4
What is the minimum distance that water pipes are placed from sewer piping?
10 feet
Cast iron pressure pipe for water mains come in what lengths?
20 feet
Which of the following types of copper piping is utilized for general piping projects?
Type L
How many methods are utilized by UT’s to measure piping or tubing?
7
Which measuring method is taken from the end of the pipe to the center of the fitting?
End to center
Which measuring method is taken from the back of one fitting to the back of the other?
Back to back
Water that is constantly circulating from the supply point into the distribution system is known as what type of storage?
Live
At what intervals should ground level storage tank roofs be inspected?
Semiannually
During the conduct of an inspection of elevated storage tank, the heating system needs to run prior to the start of the winter season, how long is the heater run to verify proper operation?
8 hours
What type of well is constructed in loose, sandy, or gravelly soil?
Driven
What is the maximum depth of a driven well?
Depths of less than 60 feet
Which of the following wells is the most pollution free well?
Drilled
What is the maximum depth of a bored well?
50 feet
Which type of cathodic protection systems are used for protecting steel water storage tanks against corrosion?
Impressed current
Which type of pump is used to increase water pressure?
Booster
Which of the following water mains distributes water throughout a community?
Distribution mains
What are the two types of standard design systems used for exterior water distribution?
Tree and Loop
What determines the maximum size of a tap when tapping a main line?
Material and size of main
(True or False) The tap should NOT be larger than 1/4 the diameter of the pipe.
True
CPVC piping can withstand temperatures as high as what?
180°
(True or False)Risers should be supported at every other floor level and at joints.
True
What is the maximum distance that a fixture supply pipe can terminate from the point of connection to the fixture?
30 inches
Which of the following pipe sizes is the minimum size to utilize when connecting supply water to a lavatory?
1/2 inch
How many types of urinals are there currently in use?
4
What is the minimum size utilized in water supply piping for a flushometer type urinal?
3/4”
How far apart are cold and hot water lines installed from each ofter?
8 inches
What type of piping is used under roads or other places of heavy traffic?
CISP
When excavating you realize that the soil contains cinders and ashes; which type of piping would be utilized?
Vitrified clay or Plastic
Which of the following fittings is used to change the direction of a CISP 22 1/2 degree?
1/16th bend
Which fitting is used mostly in venting systems?
Tapped tee
Which fitting is useful as an individual vent?
Double 90 degree Y - branch
Which fitting is utilized to join two sanitary sewer branches at a 45 degree angle?
Straight type 45 degree Y - Branch
Vitrified piping is typically used in what location?
Basement of structure
During prolonged storage, PVC piping should NOT be stacked more than how many feet high?
2 feet high
How many different ways are there to join plastic piping?
2
When testing plastic piping, which test is performed first?
Low-pressure hydrostatic
When conducting the water test after sanitary drainage installation, how long is the water to remain in the pipe?
At least 15 minutes
15 inch sewer drainage piping has been installed, what is distance required between manholes?
400 feet
When performing backfill operations on a trench, how much soil should be placed on the piping before walking on the pipe is authorized?
2 feet
Which type of pipe carries fecal matter and discharges from urinals?
Soil pipe
Which of the following components is the vertical portion of vent piping? A. Stack B. Branch C. Waste D. Soil
A. Stack
Lead pipe is available in how many weight classifications?
3
Which fitting is designed for making a connection between a closet flange and a soil stack?
Closet bend
Which fitting is commonly used as a stack base?
Combination wye and 1/8 bend
A device or fitting used to provide a water seal in a waste water system is known as what?
Trap
What pressure, if any, is caused by siphonage by momentum trap loss?
Negative
Which type of vent or stack receives waste water that contains fecal matter?
Soil stack
Which type of vent or stack receives waste water discharge from dishwashers?
Waste stack
What type of vertical piping is utilized to provide circulation of air to any part of a drainage system?
Vent stack
What fitting can also serve as a drain for another fixture?
Wet vent
Of all the building trades, what is most essential to the health and well-being of the community, in general, and to the occupants of the buildings in particular? (Page 3-1)
Plumbing
Whenever you have missing, broken, or worn- out tools, submit what form, signed by your division/company commander or chief, for replacement? (Page 3-2)
NAVSUP 1250-1
Tools requiring maintenance must be turned into what for immediate replacement? (Page 3-2)
CTR/CSR
Among the pipe materials installed underground by Utilitiesmen are cast-iron soil pipe, vitrified clay pipe, concrete pipe, and what else? (Page 3-5)
Plastic pipe
Cast-iron soil pipe is used in and under buildings, protruding from 2 to 10 feet from the building. (The National Standard Plumbing Code- Illustrated recommends at least how many feet?) (Page 3-5)
3
What bend is used to change the direction of a cast-iron soil pipeline 22 1/2 degrees? (Page 3-7)
1/16
When lead is melted, certain products of oxidation, known as what, form on top of the molten metal? (Page 3-11)
Slag
Vitrified clay pipe is made of moistened powdered clay. It is available in laying lengths of 2, 2 1/2, and 3 feet and in diameters ranging from 4 to how many inches? (Page 3-14)
42
Joints on vitrified clay and concrete pipe may be made of cement or what other compounds? (Page 3-15)
Biluminous
What joints eliminate the use of oakum and mortar joints for sewer mains? (Page 3-15)
Speed seal
Plastic pipe should be stored in a shaded area away from any source of heat that could cause damage to the pipe. During prolonged storage, it should not be stacked more than how many feet high because the weight causes it to flatten or go out of round? (Page 3- 16)
2
There are four methods of joining plastic pipe: solvent welding, fusion welding, fillet welding, and what else? (Page 3-17)
Threading
Only what schedule or heavier pipe should be used when plastic pipe is being threaded? (Page 3-19)
80
Watertight manholes are made of brick or concrete, how many feet in diameter at sewer level, and should be placed at junctions and bends in the line? (Page 3-23)
4
When the invert of the inlet pipe is more than how many feet above that of the outlet pipe, a drop manhole must be provided to conduct the sewage to a lower level with minimum turbulence? (Page 3-23)
2
A number of different types of traps are available; however, the trap most commonly used with plumbing fixtures is the what? (Page 3-24)
P-trap
To prevent the siphonage of a trap seal in fixture traps and allow gravity flow of drainage, you must let atmospheric air from outside the building into the piping system to the outlet (or discharge) end of the trap. The air is supplied through pipes called what? (Page 3-25)
Vents
Atmospheric pressure at sea level is about how many pounds per square inch? (Page 3-25)
14.7
The pipes in a waterline may follow the contour of the earth’s surface in a trench that is a minimum of how many feet deep? (Page 3-28)
2
Water pipes should be laid 1 foot above and how many feet away from nearby sewers? (Page 3-28)
10
Cast-iron pressure pipe for water mains comes in how many-foot lengths with either bell-and- spigot or mechanical (gland-type) joints? (Page 3-29)
20
The process used to soften copper is called what? (Page 3-30)
Annealing
How many methods are used in measuring pipe or tubing? (Page 3-30)
7
What is a method of forming the end of the copper into a funnel shape, so it can be held in a threaded fitting when a line joint is being made? (Page 3-32)
Flaring
What is the process of applying a small amount of solder to the end of the copper before it is inserted into the sweat fitting? (Page 3- 33)
Tinning
In SILVER BRAZING, also called SILVER SOLDERING or HARD SOLDERING, joint members are fused by heating with a gas flame and silver alloy filler metal with a melting point above what temperature, but below the melting point of the base metal? (Page 3- 34)
800°F
Silver-brazed joints have high strength on ferrous and nonferrous metals. The strength of a joint that is made properly exceeds that of the metals joined. On stainless steel, it is possible to develop a joint tensile strength of approximately how many pounds per square inch (psi)? (Page 3-34)
130,000
What is an all-purpose industrial fuel that has the high-flame temperature of acetylene and the handling characteristics of propane? (Page 3-35)
MAPP gas
MAPP gas is not restricted to a maximum working pressure of 15 psig as is acetylene. In jobs requiring higher pressure and gas flow, MAPP at the full- cylinder pressure of what psig at 70°F can be used safely? (Page 3-37)
95
What is the most important step of successful welding with MAPP gas? (Page 3-38)
Flame adjustment
The explosive limits of MAPP gas range from 3.4 percent to 10.8 percent in air or 1.5 percent to what percent in oxygen? (Page 3-38)
60
MAPP gas has a detectable odor at 100 ppm or at a concentration of what amount of its lower explosive limit? (Page 3-39)
1/340
What is a colorless, tasteless, and odorless gas slightly heavier than air? (Page 3-39)
Oxygen
Filler rods for steel are often coated with what to protect them from corrosion during storage? (Page 3-42)
Copper
If acetylene cylinders are not stored upright (valves at top), they must not be used until they have been allowed to stand upright for at least how many hours to prevent acetone discharge? (Page 3-44)
12
What term means that wrought-iron and steel pipe are protected to resist corrosion? (Page 3-44)
Galvanized
What joins two pipes of different sizes? (Page 3-45)
Reducer
What reduce the size of openings of fittings and valves to a smaller diameter? (Page 3-45)
Bushings
Cement-asbestos pipe is corrosion-resistant and does not rust or rot. It has a smooth interior surface that is a favorable friction factor. This pipe comes in sizes from 3 to 36 inches in diameter for pressures of 50 to 200 psi and in lengths of 5, 10, and how many feet? (Page 3-49)
13
Joints in cement-asbestos pipe are made with a special coupling with how many rubber sealing rings? (Page 3-49)
3
Ductile iron is cast iron in which the carbon is reformed by what? (Page 3-50)
Magnesium inoculation
