UTA4 Fire Protection Systems Flashcards
What are reproduced copies of mechanical or technical drawings? (Page 4-1)
Blueprints
What term is defined as the ability to interpret the ideas of others expressed on drawings and sketches? (Page 4-1)
Reading print
What drawings are used for exploring design concepts between the designer and the user (customer), making material selection, determining preliminary cost estimates, and as a basis for preparing the finished working drawings? (Page 4-1)
Preliminary
What drawings show the proposed building or facility in an attractive setting in its natural surroundings at the proposed site? (Page 4-1)
Presentation
In the preparation of electrical drawings, most engineers use symbols adopted by the what? (Page 4-3)
American National Standards Institute (ANSI)
What is the starting point for any building that is to be constructed? (Page 4-5)
Plot plan
What drawing includes the layout of all interior and ex- terior walls, including windows and doors? (Page 4-5)
Floor Plan
What is a tabulated statement of the material required for a given project? (Page 4-5)
Bill of Material (BM)
What is defined as a line drawing that shows the arrangement and/or relationship of parts? (Page 4-6)
Electrical diagram
What diagram is a drawing that shows the electrical plan of operations of a piece of equipment or component? (Page 4-8)
Schematic
What is a systematic method of presenting notes and information in tabular form? (Page 4-13)
Schedule
What type of automatic sprinkler system is most commonly used?
Wet pipe
In a dry-pipe sprinkler system, the entire system should be checked for tightness when air pressure losses exceed what value?
10 psi
Gaseous extinguishing systems are normally located in which of the following areas? A. Computer operation centers B. Radio receiver buildings C. Power generating facilities D. Each of the above
D. Each of the above
What type of gas is used as a propellant for a dry chemical system?
Carbon dioxide
All automatic sprinkler systems have which of the following characteristics in common?
Water supply
Piping network
Sprinkers
In a dry pipe system, the pipes can contain air or what other element under pressure?
Nitrogen
In a differential dry pipe valve system, the air must be maintained at least how many psi greater than the trip pressure?
20 psi
When debris in the water is a problem, you should use what type of dry pipe valve?
Low differential
What type of automatic sprinkler system should you use in an aircraft hangar?
Water deluge
Pre-prime plugs blow out of the sprinklers at approximately what water pressure?
20 psi
Automatic sprinklers have orifices graduated in what size increments?
1/16 inch
A fusible link sprinkler is kept closed by a two-piece link fused together by what type of metal?
Solder
A dry pendent sprinkler is used when the system is exposed to which conditions?
Freezing
A dry pipe alarm system has which characteristic?
Slow acting
The retard switch connected to the alarm port of a wet sprinkler system alarm- check valve is normally set within what pressure range?
8 to 15 psi
In an electronic pressure-drop detector, an overpressure condition of what magnitude can cause a trouble signal?
200 psi
To prevent freezing of water in a fire protection system, a Utilitiesman normally installs a supervisory device in a pipe or reservoir with what low water temperature setting?
40° F
At what interval should you inspect and test the general condition of sprinkler heads and sprinkler systems?
Annually
At what interval should you inspect and test water level in tanks?
Weekly
At what interval should you inspect and test water flow alarms?
Monthly
At what interval should you inspect and test air and water pressure in dry pipe systems?
Weekly
At what interval should you inspect and test general condition of standpipe systems?
Quarterly
At what interval should you inspect and test general condition of hydrants?
Annually
What minimum distance must be maintained beneath a sprinkler for proper water distribution?
18 inches
What type of test should be performed quarterly to test the alarm-check valves?
2-inch drain test
When testing a water clapper valve designed to trip at a fixed pressure of 10 to 15 psi, you should maintain what minimum air pressure on this valve?
30 psi
When performing a basic inspection of accelerators and exhausters, you should check what pressure?
Air
When testing deluge and pre-action valves, you should perform the 2-inch drain test at what time interval?
Quarterly
When performing a deluge valve dry trip-test in a flammable area, you should use what test in place of the electric test set?
Hot water or hot cloth
When performing the cathodic protection test with an ammeter, you notice a diminishing current flow. This is an indication of what type of problem?
Failing electrodes
Under normal circumstances, full operational testing of high-speed suppression systems should be conducted at intervals not to exceed how many years?
3
What characteristic of carbon dioxide makes it desirable for use on electrical fires?
Electrical non-conductivity
What is the normal cylinder pressure in a high-pressure system?
600 psi
In a low-pressure system, liquid carbon dioxide should always be maintained at what constant (a) pressure and (b) temperature?
(a) 300 psi (b) 0°F
High-pressure systems require approximately how many pounds of equipment for every pound of carbon dioxide stored?
3
Pipe and fittings in a high-pressure system have what minimum bursting pressure in psi?
5,000
Pipe and fittings in a low-pressure system have a minimum bursting pressure of how many psi?
1,800
What automatic device should be installed along with a total flooding system to conserve carbon dioxide?
Automatic closing device
Installation of a new Halon 1301 system is prohibited without special approval from whom?
NAVFACENGCOM
Regardless of the method being used, what device must be attached to the releasing mechanism?
Alarm
At what maximum time interval should you replace the frangible disks on low- pressure storage tanks?
5 years
How many types of systems can be used with dry chemicals?
3
Hose line
Total Flooding
Local Application
What is the most widely used dry chemical?
Sodium bicarbonate
Dry chemicals are used primarily on what type of fires?
Flammable liquid
Dry chemical distribution systems are constructed of what schedule of pipe?
40
