Class 7 Flashcards
Test 7.1 Question
Answer
Manual standpipe system relies exclusively on the (NFPA 14, 2007 — S-11, 3.3.12.4)
Fire department connection
All two-way fire department connection signs shall be permanently marked and shall be constructed of weather-resistant metal or rigid plastic materials. All interior signage shall have a __________ background with minimum 1-inch high white letters. All exterior signage shall have a __________ background with a minimum 1 - inch high red letters (NFPA 14, 2007 — S-29, 4.10Q)
Red,white
Heat is a form of energy identified by a temperature difference or a change of (Notes — chemistry & physics of fire)
State
a solid is a structure without an internal cavity that has a definite (Notes — Gases)
size / shape
A liquid is a substance that flows freely and that a definite volume but (Notes — Gases)
No independent shape
Liquids are only (Notes — characteristics & hazards of water)
Slightly Compressible
A gas is a substance that has no definite volume or independent shape that tends to (Notes — gases)
Expand indefinitely
Gases aree (Notes — Gases)
Compressible
Sensible heat is heat that can be measured with (Notes — Gases)
Thermometer / Sensed by a person
An accepted standard unit of heat measurement is the (Notes — GAses)
British thermal unit
A British thermal unit (BTU) is the amount of heat required to raise the temperature of (Notes — chemistry and physics of fire)
One pound of water 1 F
temperature is the measurement of a degree or intensity of (Notes — Chemistry and the physics of fire )
Heat
A glass thermometer is a graduated glass tube that is filled with a substance, such as alcohol or (Notes — Chemistry and the physics of fire)
Mercury
heat transfer is the movement of heat from one material (Notes — CHemistry and the physics of fire)
To another
The greater the temperature difference, the (Notes: Chemistry and physics of fire)
Greater the heat transfer
Heat transfer that occurs when currents circulate between warm and cool regions of fluid is known as (Notes — Chemistry and physics of fire)
Convection
Temperatures in boiler operation are commonly expressed using the Fahrenheit or celsius scale. The Fahrenheit scale use 0F as the freezing point of salt water and provides a larger number of increments between the freezing point of fresh water (32F) and boiling point of freshwater (212 F) compared to the celsius scale. The celsius scale uses 0 C as the freezing point of fresh water and 100 C as the boiling point of fresh water. Sometimes it is necessary to convert temperature readings to different scales. When degrees Fahrenheit is known, degrees celsius is found by applying the formula (notes — chemistry and physics of fire)
C= (F - 32) / 1.8
When degrees celsius is known, degrees Fahrenheit is found by applying the formula (notes — Chemistry and physics of fire)
F= (1.8 x C) +32
A heat transfer that occurs when molecules in a material are heated and heat is passed from molecule to molecule through the material is known as (Notes — Chemistry and physics of fire)
Conduction
Heat transfer that occurs as radiant energy ( electromagnetic waves) without material carrier is known as (Notes — Chemistry and physics of fire)
Radiation
To sustain combustion (Notes — Chemistry and physics of fire)
Heat and oxygen are required
Fuels are commonly used for combustion such as natural gas, fuel oil, and coal are fuels formed by plant and animal remains taken from the ground is called (Notes — chemistry and physics of fire)
Fossil fuels
Air from the atmosphere supplies the oxygen and nitrogen and additional elements. All of these elements become involved during combustion. Air has (Notes — Chemistry and physics of fire)
Oxygen (20.95%) & Nitrogen (78.08)
A powder composed of small particles, usually of sodium bicarbonate, potassium bicarbonate, urea-potassium-based bicarbonate. potassium chloride or monoammonium phosphate, with added particulate supplemented by special treatment to provide resistance to packing, resistance to moisture absorption (caking) and the proper flow capabilities (NYC. Bldg. code 2014 — 201, 902, definitions)
Dry-chemical extinguishing agent
A system supplying carbon dioxide (CO2) from a pressurized vessel through fixed pipes and nozzles. This system includes a manual- or automatic-actuating mechanism (NYC Bldg. code 2014 — 902, definitions)
Carbon dioxide extinguishing systems
Test 7.2 Questions
Answer
The automatic drip device between the check valve and the outside hose coupling prevents water from building up in the piping. This connection is not blocked by _________ which has _________ in the piping (NFPA 14, 2007 — S-28, 4.8.2.2Q (i) ) (Note — Overview of sprinkler and sparkler systems)
Water frozen
A connection from a reliable public water works system of adequate capacity and water pressure is _____________________ primary supply for automatic sprinkler systems (NFPA 14, 2014 — S-70, 9.1.5Q (1) — NFPA 13, 1989 — 2-8, 2-3.1.1*)
The preferred
Fire department connections must always be accessible. Each connection should be fitted with a (NFPA 14, 2007, S-28, 4.8.2.2 Q (h) — NFPA 13, 2007, 13-91, 8.17.2.5.1)
Check valve
The automatic drip device between the check valve and the outside hose coupling prevents water from (NFPA 14, 2007, S-28, 8.2.2Q (i) — NFPA 13, 2007, 13-91, 8. 17.2 .6)
Building up in the piping
Two-way fire department connections are to be colored coded, that the caps of each two-way fire department connection to an automatic sprinkler system shall be painted (NFPA 14, 2007 — S-26, 4.8.2.1Q)
Green
The two-way fire department connection serving a non-automatic sprinkler systems shall have the entire connection painted (NYC Fire Code 2014 — 120, 912.4(3))
Silver
Where temperatures drop below freezing, ordinary wet pipe system cannot be sued. There are two methods for using automatic sprinklers in places exposed to freezing temperatures. One method is to design a system where water enters the sprinkler system piping only after a control valve is opened. These are dry pipe systems, deluge systems, or pre-action systems, the other method (NFPA 13, 2007 — 13-18, 3.4.1 — NFPA 13, 1989 — 3-6, 3-5.1.1 and 5-12, 5-5.1)
Antifreeze sprinkler system
The use of antifreeze solutions shall be conformity with (NFPA 13, 2007 — 13- 38, 7.6.1.1)
State and local health regulations
An automatic sprinkler system should (Notes —- Overview of sprinkler systems)
Not be shut off and drained to avoid freezing during cold weather
The method used to supply water to sprinkler systems are the same as those for (NFPA 14, 2014 —- S-69, 9.1*)
Standpipe systems
The minimum supply of extra heads that should always be kept in a sprinkler cabinet are ( NFPA 13, 2007 —- 13-28, 6.2.9.1*)
6
Automatic sprinkler systems shall be monitored by a central supervising station. THE EXCEPTION to this (NYC Bldg. Code 2014 —- 199, 901.6.1 (1) (2) )
A central supervising station is not required for automatic sprinkler systems protecting one- and two-family dwellings / Limited area sprinkler systems serving FEWER than 20-sprinkler heads
The stock of spare sprinklers shall be kept in a cabinet locate where the temperature to which they are subjected will at no time exceed (NFPA 13, 2007 —- 13-28, 6.2.9.3)
100 F
The best way to put out a fire is to spray water from a sprinkler head (Notes —- Automatic sprinklers)
Downward / Horizontally
The spray pattern of a sprinkler head _______ ________ prevent the spread of the fire (Notes —- automatic sprinklers)
Will also
The force of the water against the deflector creates a heavy spray which is directed (NFPA 13, 2007 —- 13-19, 3.6.2.5 —- Notes —- Automatic sprinklers)
Outward and downward
The spray pattern of the water discharged from the sprinkler head is determined by the deflector (NFPA 13, 2007 —- 13-19, 3.6.2.5 —- Notes —- Automatic sprinklers)
Shape
The newest kinds of sprinkler heads allow the sprinklers to be placed farther apart, need lower flow rates to give coverage to an area. These new heads offer more effective fire protection and are less likely to cause water damage than the: (NFPA 13,2007 — 13-19, 3.6.2.5 — Notes — Automatic sprinklers)
Old style sprinkler heads
The spare sprinklers stocked in the cabinet provided shall have a special wrench provided within the cabinet to be used in the removal and installation of sprinklers. sprinkler wrench shall be provided for each type of sprinkler provided: (NFPA 13, 2007 — 13-28, 6.2.9.6)
1
Automatic sprinklers shall have their frame arms, deflector, coating material, or liquid bulb in accordance with the temperature requirements that have various temperature ratings which state the temperatures at which they will fuse. The temperature rating of all solder type automatic sprinklers is stamped on the solder link. For other heat sensitive units, the temperature rating is stamped on one of the releasing parts: (NFPA 13, 2007 – 13-27, 6.2.5.1 -13-28, Table 6.2.5.1)
colored
Sometimes conditions exist which cause a build-up of foreign material on sprinkler heads. This may prevent the sprinkler head from working properly. This buildup is commonly called: (NFPA 25, 2014 — 25-87, A.5.2.1.1.2 (2))
Loading
If the build-up on the sprinkler head is hard, it may prevent the sprinkler from opening. The best practice in fixing these sprinklers is to: (NFPA 25, 2014 — 25-87, A.5.2.1.1.2 (2))
Replace with new sprinklers
Deposits of light dust are less serious than hard deposits. Dust build up may delay the operation of sprinkler heads. However, it will not prevent the eventual discharge of water. Dust deposits can be blown or vacuum off. Scouring or acidic liquids are likely to damage the sprinklers and should not be used for cleaning. Hot solutions of the mildest type: (NFPA 25, 2014 — A.5.2.1.1.2 (5))
Should never be used to clean sprinkler heads
A certificate of fitness holder shall maintain a detailed record of all inspections. A record card with the date of each inspection, the certificate of fitness number, and the signature of the fitness holder shall be posted: (Notes — Sprinkler & Standpipe systems)
Near the main control valve
All defects of violations shall be noted on the report. (detailed record) Records shall be made available to any representative of the: (NYC Fire Code 2014 — 14, 107.7)
Fire department and kept for 3-years
The certificate of fitness holder should report all major defects immediately to: (NYC Fire Code 2014 — 16, 113.2 (2))
The local fire company / The owner or manager of the building / The bureau of fire prevention
Test 7.3 Questions
Answer
If a flammable gas with a specific gravity greater than one escapes from its container, it will typically: (Notes – Chemistry and physics of fire)
Sink to a low level and travel considerable distances to potential
Propane (C3H8), which has a molecular weight of 44, is heavier than air and, if leaking from a cylinder will: (Notes — Chemistry and physics of fire)
Will, accumulate near the ground
The density of a gas will decrease as its temperature is: (Notes — Chemistry and physics of fire)
Increased
Hot products of combustion will: (Notes — Chemistry and physics of fire)
Tends to rise
Because of the very low temperature of Liquefied natural gas (LNG), The spills can be very dangerous, as the vapor: (Notes — Chemistry and physics of fire)
Can spread over a wide area with little dilution
Liquefied natural gas (LNG), the vapor: (Notes — Chemistry and physics of fire)
Heavier than air
Because molecules of a liquid are always in motion (the amount of motion depends upon the temperature of the liquid), molecules are continually escaping from the free surface of the liquid to the: (Notes — Chemistry and physics of fire)
Space above
Extinguishment of a fire involving a continuously flowing combustible gas often is difficult. The best tactic is to: (Theory of fire extinguishment)
Shut off the flow of gas
Which agent is used in extinguishment of a fire involving a continuously flowing combustible gas, it should be projected: (Notes — Theory of fire extinguishment)
In the same general direction as the burning jet or plume
Application of water or foam to the surface of a smoldering fire is not always effective, because water: (Notes — Theory of fire extinguishment)
Cannot penetrate the hot interior where the combustion is occurring
Application of any dry chemical agent on electrical fires is: (Notes — Theory of fire extinguishment)
Safe
The specific gravity of water (liquid) is equal to: (Notes — Flammable and combustible liquids)
1
A liquid with a specific gravity of less than one will: (Notes — Flammable & combustible liquids)
Will generally float on the water
The specific gravity greater than one indicates that the water will: (Notes — Flammable & combustible liquids)
Float on the liquid
Vapor density is the weight per unit volume of a pure gas or vapor For fire protection purposes, vapor density is reported in terms of the ratio of the relative weight of a volume of vapor to the weight of an equal volume of: (Notes — Flammable & combustible liquids)
Air
In this respect, the vapor density ratio is similar to the specific gravity of a liquid, except that air is used as the standard in place of (Notes — Flammable & combustible liquids)
Water
Air is taken as a unit and vapor the density is reported as a ratio. A vapor density of 3 (i.e., 3:1) indicates that the vapor is: (Notes — Flammable & combustible liquids)
Three times as dense, or heavy, as air
Oxygen is a clear, odorless, tasteless, colorless element. It is most commonly found in the gaseous state and compromises approximately: (Notes — Oxygen enriched atmosphere)
21% of the atmosphere
Oxygen is necessary for plant and animal life and it supports: (Oxygen enriched atmosphere)
Combustion
Flame spread rates are much greater in an direction, due to the buoyant convection, than in the and downward direction: (Notes — Basics of passive fire protection)
Upward, Horizontal
Waterflow alarm systems may be as simple as a hydraulically operated water motor gong serving a single sprinkler riser, or as complex as a multiplex proprietary fire alarm system covering several hundred sprinkler risers at a very large industrial facility. In either case there are certain basic functions that must be provided by whatever waterflow alarm equipment is installed may include: (Notes — Fire alarm system interfaces)
The reliable operation of a suitable audible alarm notification appliance / The provision of suitable facilities to test the operation of the waterflow alarm device, preferably by an actual flow of water equivalent to the discharge from a single automatic sprinkler having the smallest orifice of those sprinklers installed in the system / The prompt detection of the discharge of a certain number of gallons per minute at a nominal pressure that would be equivalent to the amount of water discharged from a single operating sprinkler having the smallest orifice of those sprinklers installed in that particular system
Water motor gongs are operated by a flow of: (Notes — Fire alarm system interfaces)
Water
After the completion of a sprinkler job, of which an OP 98 was filed, the final sign off will be done:
By a plumbing in
An orifice of a sprinkler head has a “K” factor using an opening from 1/2-inch to 1.00-inch. This would be a contrast of flows from: (NFPA 13, 2007 — 13-27, Table 6.2.3.1)
25% to 100%
Standard weight pattern cast-iron fittings 2-inch (50 mm) in size and smaller shall be permitted where pressures do not exceed: (NFPA 13, 2007 — 13-30, 6.4.4.1)
300 psi(20.7 bar)
When the temperature increases, the density of gas will:
Decrease
A fire detector that senses heat, either abnormally high temperature or rate of rise, or both: (NYC Bldg. code 2014, page 201 902.1)
Heat detector
When self-certifying a sprinkler system with the department of buildings: (NYC department of buildings rules)
Submit a TR-1, FP85 before work begins
The property that water doesn’t have to extinguish a fire: (Notes — Water & water additives for fire fighting)
Chemicals
A local alarm unit is an assembly of apparatus approved for the service and so constructed and installed that any flow of water from a sprinkler system equal to or greater than that from a single automatic sprinkler of the smallest orifice size installed on the system will result in an audible alarm on the premises within: (NFPA 72,2002 — 72-41, 5.10.2*)
90-seconds of water flow at the alarm-initiating device
Fire department connections shall be equipped with: (NFPA 13, 2007 — 13-32, 6.8.2)
Approved plugs properly secured and arranged for easy removal by fire departments / Approved caps properly secured and arranged for easy removal by fire departments / Approved plugs or caps easily removed by building personnel
The type of gases approved to be used and maintained on a dry- pipe sprinkler system throughout the year shall be: (NFPA 13, 2007 — 13-19, 3.4.5)
Air or N2
A sprinkler system in which parallel cross mains are connected by multiple branch lines. An operating sprinkler will receive water from both ends of its branch line while other branch lines help transfer water between cross mains: (NFPA 13, 2007 — 13-19, 3.4.6*)
Pre-action system
Residential sprinklers shall have piping calculations hydraulically calculated in accordance with Section 22.4 to furnish a minimum of ___________ psi at any sprinkler with all sprinklers facing the exposure operating: (NFPA 13, 2007 — 13-118, 11.3.2.1*)
7
A type of fast-response sprinkler that meets the criteria of 3.6.1 (a) (1) and is listed for its capability to provide fire suppression of specific high-challenging fire hazards: (NFPA 13-2007 — 13-19, 3.6.2.1*)
ESFR
Where cold weather prevents testing with water, an interim air test shall be permitted to be conducted prior to the standard hydrostatic test. An air pressure leakage test at 2.8-bar (40-psi) shall be conducted for: (NFPA 14, 2007 — S-79, 11.4.5, 11.4.5.1)
24-hours
Cross mains should be connected to risers or feed mains with flanges. In general, ____________ fittings should be installed at points which would allow easy dismantling of the system. Split ring or other removable types of hangers will facilitate the dismantling: (NFPA 13, 2007 – 13-258, A.7.9 — NFPA 13, 1989 — 11-67, A-5-2-6)
Flanged
Water as an agent is safe, non-toxic, non-corrosive, and stable. Water (H20) remains stable when applied to a fire and does not break down into its basic elements of Hydrogen (H) and Oxygen (0), both of which would: (Notes — Water & water additives for fire fighting)
Encourage fire growth
Water comes in three states. Which state does water not come in: (Notes — Water & water additives for fire fighting)
Gas (H)
The physical properties that allow water to be effective extinguishing agent is: (Notes — Water & water additives for fighting fires)
At ordinary temperatures, water exists as a stable liquid / Water has a high density / Water as a liquid can absorb heat
Water as a liquid can absorb a specific heat of 1-BTU per pound therefore, raising the temperature of 1-pound of water 180F from 32OF to 212OF it can absorb: (Notes — Water & water additives for fire fighting)
212 - BTU
The temperature of a material is the condition that determines whether it will transfer heat to or from other materials. Heat always flows from: (Notes — Chemistry & physics of fire)
Higher to lower temperatures
Temperature is measured in: (Notes — Chemistry & physics of fire)
Degrees
How many BTU’s will it take to raise the temperature of one-gallon of water from 68F to the boiling point:( Notes — Water and water additives for fire fighting)
1200
Using the information given in question #44, how much heat (BTU) is required to change the water from a liquid to a vapor per gallon: (Notes — Water & water additives for fire fighting)
9,283 BTU/ Gal.
Test 7.4 Question
Answers
Test 7.5 Question
Answer
If a volume of gas has positive buoyancy then it is: (Notes-Chem. & physics of fire)
Lighter than surrounding gas and will tend to rise
Buoyancy is the ___________ force exerted on a body or volume of fluid by the ambient fluid surrounding it: (Notes- Chem. & physics of fire)
Upward
If a volume of gas has negative buoyancy then it is: (Notes- Chem. & physics of fire)
Heavier and will tend to sink
The buoyancy of gas depends upon both its molecular weight (e.g., gas specific gravity) and its: (Notes- Chem. & physics of fire)
Tempature
If a flammable gas with a specific gravity greater than one escapes from its container, it will typically: (Notes – Chemistry and physics of fire)
Sink to a low level and can travel considerable distances to potential sources of ignition
The density of gas will decrease as its tempature is: (Notes- Chem. & physics of fire)
Increased
Indicator post valves should have: (Notes- Water distribution systems)
A unifrom flange to suit all sizes of gate valves/ Interchangeable operating stems/ Uniform-sized square operating nut measuring on inch square by one-inch high
A required feature for a check valve is: (Notes- Water distribution systems)
Large clearances between moving parts and body/ A clapper that moves entirely out of the waterway
A required feature for a gate valve: (Notes- Water distribution systems)
Stuffing boxes with good-sized packing space/ Bronze-lines giand and bonnet opeing, and a valve capaple of being repacked under pressure/ Yokes bolted on bonnets in valves larger than 4-inch
Good practice indicates that valves are provided so that no single accident, break, or repair will necessitate shutting down a length of pipe greater than: (Notes- Water distribution systems)
500-feet in high density districts or greater than 800-feet in other sections
Horizontal centrifugal fire pumps are of the: (Notes— Fire pumps)
Split case or end suction type
Horizontal centrifugal fire pumps of the end suction type is manufactured to: (Notes— fire pumps)
ANSI specifications
Normal consumption demands for consumption purposes are usually expressed in the following terms: (Notes- Water supply requirements for fire-fighting protection
Average daily demand, or the average of the total amount of water used each day during a one- year period/ Maximum daily demand, or the maximum total amount of water used during any 24-hour period in a 3-year period/ Peak hourly demand, or the maximum amount of water used in any given hour or day
Air from the atmosphere supplies the oxygen and nitrogen and additional elements. All of these elements become involved during combustion. Air has (Notes — Oxygen enriched atmosphere)
Oxygen (20.95%) & nitrogen (78.08%)
In recent years’ sprinklers have been listed with Teflon coatings. The reason is to: (NFPA 13, 1989—3-37, 3-11.1 (f), 3-40, 3-11.4*)
Be used to protect from corrosion
Under no circumstances can sprinklers be “field coated” with any type of material, doing so: (NFPA 13, 1989 —3-39, 311.2, 3-40, 3-11.5, 3-41, 3-11.4.3 Ex.)
The coating may react to the operating elements or the Teflon seal used to seat the orifice cap
A foot-pound is a unit of energy, equal to the amount of energy required to raise a weight of one pound a distance of: (Notes— Basic science)
One-foot
A horsepower per/hr, is a unit of work equal to 1,980,000 foot- pound/hr, and: (Notes— Basic science)
33,000 foot-pounds/min/ 550 foot-pounds/sec
1,980,000 foot-pound/hr, is equal to: (Notes— basic science)
33,000 foot-pounds/min/550 foot-pounds/sec
Direct connections of sprinkler systems to a city main is acceptable as an automatic water supply provided each service directly supplying a standpipe or a fire pump shall be equipped with a control valve located under the sidewalk in a flush sidewalk box located within_____________ feet of the street line: (NFPA 14, 2007 — S-70, 9.1.5Q (1) (a)
2-feet
The pilot tube should be held approximately __________ the diameter of the hydrant nozzle opening away from the opening. It should be held in the center of the stream excpet that in using hydrants outlets the stream should be explored to get average pressure: (NFPA 13, 1989 — 12-2, B-2-1.6)
1/2
Automatic sprinkler systems are designed to automatically distribute water on a fire. The sprinkler systems designed to extinguish the fire entirely, or to prevent the spread of the fire. An automatic sprinkler system consist of a series of pipes at or near the ceiling in a building. The sprinklersystem is filled with automatic devices, designed to release water on a fire. These devices are called ________________ and are normally closed by a _______________ or cap. This cap is held in a place by a heat sensitive releasing element. A rise in tempature to a predetermined heat causes the sprinkler head to open. Water is then discharged in the form of a ______________. When the sprinkler heads are open, they are said to have___________. The sprinkler heads are installed at standard intervals on the piping. If more than one head opens, the area sprayed by each_____________ that of the sprinkler head next to it: (Note— An overview of Spkrs, & Spkr. systems)
Sprinkler heads, disk, spray, burned, overlaps
All sprinkler pipe and fittings shall be so installed that the systems can be drained. On a wet pipe systems, sprinklers pipes shall be permitted to be installed: (NFPA 13, 2007— 13-87, 8.16.2.2.1)
Level
On a water service flush box used for standpipe systems, the purpose of each such control valve shall be clearly indicated by the words: (NFPA 72, 2002— 72-41, 5.10.2*, 5.10.3)
” Standpipe Supply Control”
Sprinkler waterflow alarm-initiating devices, intiating of the alarm signal shall occur within______seconds of water flow at the alarm-initiating device when flow occurs that is equal to the greater than that from a single spinkler of the smallest orifice size installed in the system. Movement of water due to wastesurges, or variable pressure shall not initiate an alarm signal: (NFPA 72, 2002— 72-41, 5.10.2*, 5.10.3)
90-seconds
Local waterflow or water going rings; (NFPA 13, 1989, 3-47, 3-12.1 Definition)
When water flows through the pipe
Pressure-resricting valves used as a standpipe hose outlet valves shall be adjusted and permantetly marked when initially installed in accordance with 27-944 of the adminastrative code. When pressure reducing valves are initially installed and at least once every: ( NFPA 25, 2014— 25-59,13.5.2,2*)
Five-years thereafter
The certificate of fitness holder ( Fire and Life Safety Director) shall maintain a record of: (NYC Fire Code 2014 — 51,401.4.5.1—401.7.8, 401.8, 401.8.2, 401.8.3)
All inspections made, in detail form
When a sprinkler or standpipe system is installed and is being self-certified by the licesnse contractor of record and all the inspections have been certified by the contractor and the work is completed, what certification must be submitted:
OP 98 by the licesed contractor
Diffusion flames are called: ( Notes- Chem. & physics of fire ext., Fire hazards of materials)
In fires, it’s the basic gas-phase combustion process that usually occurs along thin flame sheets
All sprinkler pipe and fittings shall be so installed that the systems may be drained. On a wet pipe systems sprinkler pipes may be installed level, however, on tose portions of pre-action systems subject to freezing and on dry-pipe systems, sprinkler pipe has a minimum pitch on cross and feed mains which shall be given a pitch of not less than: (NFPA, 2007— 13-87, 8.16.2.3.2—NFPA 13, 1989— 3-14, 3-6.1.1*, 3-6.1.2, 3-6.1.3)
1/4-inch per 10-feet
All main water supplies should be connected with the sprinkler system at the base of the riser, except that where a gravity or pressure tank or both constitute the only automatic source of water supply, permission may be given to connect the tank or tanks with the sprinkler system at the: ( NFPA 13, 1989- 12-2, B-2-2.1)
Top of riser
The minimum quantity of water reserved for standpipe service by a gravity tank for each standpipe zone, for a class 1 and 111 systems: (NFPA 14, 2007—5-77,9.2Q—NFPA 14,2003—S-89, 9.1.4 (4) (a)— 576, 7.10.1.1.1)
15,000-gals.
Gate valves are made up: ( Notes— An overview of spkrs. & spkrs. systems)
Tight enough not to leak
Gate valves of the non-indicating type are proided in water distribution systems. Gate valves allow parts of the sprinkler system to be shut off for repairs or maintenance. This is done without reducing protection over a wide area. Such valves are normally: (Notes—An overview of spkrs. & spkrs. systems)
A non-rising stem
Gate valves of the non-indicating type are operated using: (Notes— Water distribution systems)
A special key wrench
Oxygen supports: (Notes— Oxygen enriched atmosphere)
Combustion
Gate valves of the non-indicating type have a valve box, which is located over the valve to keep:
Dirt from the valve nut
Gate valves of the non-indacating type must have a complete record made for each valve in the system. This record should not include: (Notes— An overview)
The diameter of the handle
Waterflow alarms and fire alarms give warning to the actual occurance of the fire. This signal is given (Notes —Fire alarm system interfaces)
Water flows through the system
Oxygen is clear, oderless, tasteless, colorless element. It most commonly is found in the gaseous state and comprimises approximately( Notes — Oxygen enriched atmosphere)
21% of the atmosphere
During construction of a new building, or an altered building, or demolition of any structure for which a standpipe system is required, provision shall be made for the use of such standpipe by the fire department, temporary risers in a structure 275-feet high is required, the diameter of the pipe shall be a minimum of : (NFPA 14, 2007 — 5-83,12.3Q)
4-inch
What percent of oxygen won’t support combustion of paper: ( Notes— Oxygen enriched atmosphere)
4%
For fire suppression piping contractors’ licenses, nothing herein contained, however shall be contrued prohibit the use of a license by the holder thereof for on behalf of a partnership, corporation or other business association, provided that______ or more of the control or voting stock of such partner, corporation, or other business association is owned by one or more holder: (NYC Adm. Code 2014 — 103, 528-410.8 (1))
51%
Certain piping materials have a list price of $1,200.00. If a discount of 24% is applied, the dollar amount saved on the sale will be:
$288.00
When placing an extension ladder against the wall, the ladder must be placed at a safe angle against the wall. Therefore, in accordance with recommend practice, the distance between the foot of the ladder and the wall should be approximately equal to: (OSHA rules)
One-fourth the hieght of the ladder
A set of sprinkler/ standpipe plans are drawn to scale of 1/8-inch per foot. A horizantol line measuring 16-3/4-inches on the plan should actually measure:
134-feet
Of the following types of filler metals for brazing, the one which can produce highly toxic fumes when brazing: (NFPA 13, 1989 —3-19,3-7.4, BAG-2 has 17.19% candmium which is highly toxic)
Bag-2
The manufacturer specifies the material listed as $344.00 and to be discounted 35% for hangers. The cost is most nearly:
$223.00
The fire sprinkler system which has a slight air pressure or no air pressure, then works in conjuction with another fire detection system is: (NFPA 13, 1989—5-8, 5-3.1)
Pre-action system
A system that provides 2-1/2-inch (65-mm) hose connection to supply water for use by fire departments: (NFPA 25, 2014—25-11, 3.3.43.3.1)
Class 1 system
A device capable of removing from the water all solids of sufficient size that are obstructing water spray nozzles: (NFPA 25,2014—25-11, 3.3.44*)
Strainer
A standpipe system having piping containing water at all times (NFPA 25, 2014 —25-11, 3.3.41.1)
Wet standpipe system
Underground fire service steel pipe shall be utilized in fire department connections and protected in accordance with the requirements of 10.1.3 shall not be additionally required to be: (NFPA 13, 2007 —13-106, 10.1.6.2)
Lined
Assume you have assigned 12-fitters to install a fire suppression system that must be completed in 10-days. At the end of eight days, only 3/4 of the job has been completed. In order to complete the job on time, you should assign a minimum of:
4-extra fitters
Fittings used in sprinkler systems shall be extra heavy pattern where pressures exceed: (NFPA 13, 2989 —3-21, 3-8.1.3)
175-psi
Before shipment from the factory, each pump shall be hydrostatically tested by the manufacturer for a period of not less than____________ minutes: (NFPA 20,2013 —20-19, 4.22.2.1)
5-minutes
It is customary practice to replace old style sprinklers with standard sprinklers in existing installations after a period of time. The basic difference between a standard sprinkler and an old style sprinkler: (NFPA 13, 1989 — 3-8, 3-11.1)
Deflector design
Before shipment from the factory, each pump shall be hydrostatically tested. The test pressure shall not be less than one and one-half times the sum of the pump’s shutoff head plus its maximum allowable suction head, but in no case shall it be less than_____________psi: (NFAP 20, 2013 —20-19, 4.22.2.4)
250
Before shipment from the factory pump casings shall be essentially tight at the test pressure. During the test, no objectionable leekage shall occur: (NFPA 20, 2013 — 20-19, 4.22.2.4)
At any joint
In a standpipe system, a check valve is installed horizontally in the piping for fire department connection. Of the following types of check valves, the one which should be used in this installation is: (NFPA 14, 2007 —5-94, Figure A.6.4)
Swing check valve
When testing, each control valve shall be operated annually through its full rage and returned to its normal position. Post indicator valves shall be opened until spring or torsion is felt in the rod, indicating that the rod has not become detatched from the valve. This test shall be conducted everytime the valve is closed. Post indicator and outside screw and yoke valves shall be beacked a _________________ turn from the fully open position to prevent jamming. A main drain test shall be conducted any time the control valve is closed and reopened at system riser: (NFPA 25, 2014 — 25-56, 13.3.3.1, 13.3.3.2*, 13.3.3.2.1, 13.3.3.3 & 13.3.3.4)
One-quarter
Underground piping shall be listed for fire protectionservice. Steel piping shall not be used for general underground service unless specifically listed for such service. Steel pipe used with fire department connections, where externally coated and wrapped and internally galvanized, steel pipe shall be permitted to be used between the: ( NFPA 13-2007 —13-106, 10.1, 10.1.1*, 10.1.2 & 10.1.3)
Check valve and the outside hose coupling for F. D. connection
Pressure maintenance (Jockey or Make-Up) pumps shall not be required to be listed. Pressure maintenance pumps shall be approved. The pressure maintenance pump shall be sized to replenish the fire protection system pressure due to allowable leakage and : (NFPA 20, 2013 — 20-19, 4.25.1.1*)
Large Pressure drops
Pressure maintenance pumps (Jockey or Make-Up) pumps shall have rated capacities: ( NFPA 20, 2013 — 20-19, 4.25.2)
Not less than any normal leakage
An automatic multi-stage fire standpipe pump is equipped with a 3-inch pressure relief valve is installed in the fire pumps: ( NFPA 20, 2013 —20-14, 4.13.1.2)
DIscharge side of the pump before the discharge check valve
An isolation valve shall be installed on the suction of the pressure maintenance pump: (NFPA 20-2013 — 20-19, 4.25.5.3)
To isolate the pump for repair
A ___________ and isolation valve shall be installed in the discharge side of maintenance pump: ( NFPA 13, 1989 —3.4, 3-2*)
Check Valve
In a sprinkler installation, the pipes that are directly supplying the line in which the sprinklers are placed are called:(NFPA 13, 1989, 3-4, 2-2*)
Cross mains
Of the following types of heat detectors, the one that is commonly used in automatic sprinklers and is often used to release fire doors is the: ( Notes — Automatic fire detectors)
Fixed tempature detector
