UTB4 Structural Openings and Piping Material Flashcards
What are used to stop, throttle, or control the flow of water in a pipeline? (Page 4-1)
Valves
What valve is used in systems where a straight flow with the least amount of restriction is needed? (Page 4-1)
Gate
What type of valve is light in weight, takes up less space than a globe valve or gate valve, is easy to overhaul, and can be opened or closed quickly? (Page 4-2)
Butterfly
What type of valves are automatic valves used to provide a steady pressure lower than that of the supply pressure? (Page 4-4)
Pressure-reducing
What is the best way to extend the service life of valves and fittings? (Page 4-6)
Periodic maintenance
When a valve seat contains irregularities that are too large to be removed by grinding-in, you can remove them by what method? (Page 4-8)
Lapping
In general, rings used as packing are used in valves that require packing larger than what size? (Page 4-9)
1/4 inch
Most large manually operated valves are operated through gears as are motor-operated valves. These gears are housed in what? (Page 4- 10)
Gearboxes
What measure the flow of water within a line to a point of distribution, such as laundries, housing areas, and so on? (Page 4-11)
Water meters
What keeps moisture from condensing on the outside of cold pipes? (Page 4-18)
Insulation
All trenches deeper than how many feet must have their sides supported or protected by sloping or battering? (Page 4-20)
5
Ladders used as access ways should extend from the bottom of the trench to not less than 3 feet above the surface. Lateral travel to an exit ladder should not exceed how many feet? (Page 4-23)
25
What is an elevated working platform for supporting both men and materials? (Page 4-23)
Scaffold
Most scaffolds are in one of three primary categories: tubular, suspended, or what else? (Page 4-23)
Rolling
What is a group of sewer pipes and pumps designed to convey domestic and industrial wastes and to transport them to a wastewater treatment plant? (Page 4-24)
Wastewater system
Sewers should be designed to let the wastewater move at not less than how many feet per second? (Page 4-25)
2
What lets you inspect and clean sewer lines? (Page 4-26)
Manholes
On large mains of how many inches or more in diameter, the manholes are often spaced from 300 to 600 feet apart? (Page 4-26)
60
Service connections, or house sewers (the lines from the house to the street lateral), are often built with concrete, cast iron, or plastic pipe. They should not be smaller than how many inches in diameter? (Page 4-28)
4
Shutoff valves should be installed at intervals not greater than 5,000 feet in long supply lines and how many feet in main distribution loops or feeders? (Page 4-31)
1,200
For large shutoff valves (approximately how many inches in diameter and larger), it may be necessary to surround the valve operator or entire valve with a vault to allow for repair or replacement? (Page 4-31)
30
Generally, hydrants are located at least 50 feet from a building and in no case are they located closer than how many feet to a building, except where building walls are blank fire walls? (Page 4- 31)
25
Hydrants should not be located less than 6 feet nor more than how many feet from the edge of a paved roadway surface? (Page 4- 31)
7
In aircraft fueling, mass parking, servicing, and maintenance areas, the tops of hydrants must not be higher than 24 inches above the ground with the center of the lowest outlet not less than how many inches above the ground? (Page 4-31)
18
What is a feature of the box type structural design method?
Plumbing is exposed.
What is required for piping to pass through a masonry wall in a frame type structural design method?
Sleeve or plastic pipe is placed around the piping.
Where can the locations of plumbing fixtures to be placed inside a storage facility be located prior to construction?
Rough- in specifications
During the construction of a building (berthing), UTs complete the plumbing installation in how many phases?
2
Before the concrete slab foundation is poured, what needs to be installed first?
Horizontal drainage piping below ground
When piping is stubbed up, what is the minimum termination height of the pipe in inches?
12”
Which tools is used to make round holes in wood with an electric drill?
Paddle bit
If electricity is not available, which of these tools would be utilized to make irregular shaped holes?
Keyhole saw
What type of structural opening is made by notching the top of the structural member?
Over cut
What is the maximum size of an under cut on a beam?
1/2 the width of the beam
Horizontal water and waste piping must be supported to prevent what condition?
Sagging
During the rough-in process, which type of measurement is most commonly used?
Center to center
When cutting pipe with a pipe cutter, how do you open the jaws of the cutter?
turning the handle counterclockwise
What is the purpose of reaming a pipe after the initial cut?
Remove burrs from the inside diameter of the pipe
What is the desired angle of a locally manufactured piece of pipe threads?
60°
Which of these prevents the threads from becoming dulled during the pipe threading process?
Oil
What two pipe-joint compounds are most commonly used?
Teflon tape and pipe dope
What is the result of over tightening the joint when connecting fitting connections?
Joint might leak
What size pipe wrench is used with a 1 inch pipe?
14”
What size pipe wrench is used with a 1/8 inch pipe?
8”
How many different types of pipe nipples will you work with as a UT?
3
(True or False) Whenever you are assembling threaded joints, be sure to apply joint compound to the female threads.
False
What is the size of the cold water inlet line for a cold water distribution system installation?
3/4”
At what interval is 3/4 inch steel pipe horizontally supported?
Every 10 feet
At what interval is 1 inch steel pipe horizontally supported?
Every 12 feet
By how much space and how many feet is 1/2 inch steel pipe vertically supported?
Every other floor not to exceed 25 feet
Before water is applied to a structure, how many pressure tests of the piping are conducted?
2
Which type of plastic pipe is used for distribution mains?
PVC
What size does Polyvinyl Chloride piping come in?
20 foot lengths
What is the maximum temperature that CPVC piping can withstand?
180° F
PVC schedule 40 piping is used in which type of piping system?
Exterior water lines
(True or False) PVC schedule 80 can withstand a higher pressure than PVC schedule 40.
True
PVC schedule 80 piping can be joined by which two materials or methods?
Solvent glue and threading
Which of these distribution systems utilizes CPVC schedule 40 piping?
Exterior water
Before solvent welding operations are conducted, how long do the fitting and pipe temperatures need to remain the same?
One hour
At what temperature should the pipe be placed in a shaded area prior to priming the interior of the pipe threading?
90° F
When solvent welding, how long do you need to hold the two ends welded together to achieve a good adhesion?
2 minutes
During the solvent welding process, what is the result of rapid drying the connection?
Blisters in the cement film
Which type of agent is applied to the contact tip of the fusion electric welding tool?
Silicon releasing agent
During fillet welding operations, what is the result of too much pressure on the rod while welding?
Weld will crack as it cools.
What is the most popular material used in hot water supply installation operations?
Copper tubing
What color designates Type K copper tubing?
Green
What color designates Type L copper tubing?
Blue
(True or False) Type M copper tubing is identified with a red band or red stenciling on its surface.
True
Which type of copper tubing is recommended for use in heating installations?
Type L
Type DWV tubing is available in what size?
20 foot lengths
Which method of bending tubing is the simplest?
Hand method
When using a mechanical bender, you can make bends up to how many degrees?
180°
How many parts make up a compression type joint?
3
What is an advantage of using a flaring type of copper tubing connection?
Ease of disassembly
True or False) When flared joints are properly tightened, they will withstand 4,000 psi of internal pressure.
False only 3,000 psi.
What scientific principle governs the force responsible for bonding in solder joints?
Law of capillary attraction
Which of the following solder types is used to solder copper tubing?
95/5
What is the melting point of silver solder?
1145° to 1650°
Solder used in joining copper tubing melts at what temperature?
452°
When horizontally supporting copper tubing that is 1 1/2 inch or less in diameter, what are the spacing support requirements?
Every 6 feet
Which of these structural opening cuts is most desirable for support of piping? A. Center cut B. Over cut C. Under cut D. Notch
A. Center cut
When conducting end–to-end measurements for piping, what value is needed to establish a correct length?
Thread engagement
What is the minimum temperature at which plastic piping should be joined?
40°F
Which of the following processes is used to expand the end of the tubing to receive the same size tubing? A. Ferruling B. Flaring C. Sweating D. Swedging
D. Swedging
