NFPA 10 Questions with Answers Correctly Solved, Exams of Safety and Fire Engineering

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NFPA 10 Questions with Answers Correctly Solved

Q 1.Examples of extinguishers for protecting class B hazards are A. aqueous film forming foam B. Carbon dioxide c.Wet chemical d. A and B only E. all the above: D. A and B only 2.A church is classified as what type of hazard? A. light(low) hazard B.Ordinary(moderate) hazard C. Extra(high) hazard D. Special(unusual) hazard: A. Light hazard 3.A parking garage is classified as what type of hazard? A. light(low) hazard B.Ordinary(moderate) hazard C. Extra(high) hazard D. Special(unusual) hazard: B. ordinary 4.A boat or aircraft servicing is classified as what type of hazard? A. light(low) hazard B.Ordinary(moderate) hazard C. Extra(high) hazard D. Special(unusual) hazard: C. extra 5.Building protection should be provided by fire extinguishers suitable for what class of fire extinguishers? A. Class a B class B C. class C D. All the above: D. All the above 6.An ordinary hazard occupancy is also designated as a hazard occu- pancy A. normal B. significant c. medium D. moderate: D. moderate 7.The minimum rated single fire extinguisher for an Extra Class A

2 / hazard occupancy A.2-A b. 2-A 10 BC C. 4-A D. 4-A 10BC: C. 4-A 8.The maximum floor area per unit of a rating for an Ordinary Class A Hazard Occupancy is A.1000 sq ft B.1500 sq ft C. 2000 sq ft D.2500 sq ft: A. 1000 sq ft 9.The maximum travel distance to an 80-B extinguisher for an Extra B hazard is A.30 ftt B.50 ft C. 75 ft D.100 ft: B. 50 ft 10.The maximum travel distance for a class C hazard is A.30 ft B.50 ft C. 75 ft D.none of the above: 11.Who is responsible to ensure that proper maintenance, inspection, and recharging is conducted for all five extinguishers in the premises A.Fire dept B.authority having jurisdiction C. owner D.service technician: C. owner 12.Carbon dioxide hose assemblies that pass the conductivity test shall have the test information recorded on a label that is attached to the A. fire extinguisher B. carrying handle C. hose assembly D. Discharge lever: hose assembly 13.Internal examination of the extinguisher is a required procedure during the annual maintenance for which of the following type of extinguisher A. stored pressure dry chemical B.Cartridge operated dry chemical C. Carbon dioxide D. None of the above: B. cartridge operated dry chemical

3 / 14.Which of the following type of fire extinguisher does not require a six year internal maintenance? A. cartridge operated dry chemical B. stored pressure dry powder

4 / C. stored pressure halogenated agent D. stored pressure water: d. stored pressure water 15.Which of the following type of extinguishers does not require a "verifica- tion of service" collar A. Cartridge operated dry chemical B.Class K C. Pressurized water D. Stored pressure wheeled: A Cartridge operated dry chemical 16.Which of the following is not justification for condemning a cylinder during the visual examination A. the extinguisher shows evidence of being burned in a fire B. there is pitting under a removable nameplate C. the paint on the cylinder is peeling away D. The fire extinguisher was used to dispel an insecticide: C. the paint on the cylinder is peeling away 17.When a fire extinguisher cylinder, shell, or cartridge must be condemned because it fails hydrostatic pressure test of fails to pass visual examination, which of the following procedures must be performed A.CONDEMNED must be stamped on the sylinder B.the owner must be notified that the cylinder may not be reused C. The owner mist be notified in writing that the cylinder is condemned D.All the above: D. all the above 18.Nitrogen and argon cylinders require a five year hydrostatic retest unless a test interval is specifically permitted by the US department of Transportation A.6 year B. 10 year C. 12 year D.None of the above: 19.the discharge hose assembly equipped with a shutoff nozzle;e on a car- tridge operated dry chemical extinguisher must be hydrostatically tested at what interval A.5 years B.6 years C. 10 years D.12 years: 20.What is the correct hydrostatic test pressure for a stored pressure dry chemical fire extinguisher? A.300 psi

5 / B.5/3 times the operating pressure C. 2 time the operating pressure D.None of the above: A. 300 psi 21.What is the minimum frequency for calibrating the master pressure gauges used for hydrostatic testing of fire extinguisher cylinders, shells, and acces- sories A.Quarterly B.Semi-annually C. Annually D. None of the above: B. semi annually 22.A three dimensional fire often involves static flammable liquid True False: False 23.Class A fire extinguishers (choose all that apply) are okay for wood are okay for paper are NEVER okay for plastics are NEVER okay for textiles offer the coating effects for dry chemicals: 24.Dry chemical stored pressure extinguishers: A. are recommended for complex buildings B. are recommended for small facilities C. should be replaced: C should be replaced 25.The four elements that must be present for fire to exist include heat, oxygen, fuel, and a chemical reaction between the three. True/False: True 26.The concept of fire prevention is to keep these elements separate. True/False: True 27.There are four classes of fire, Class A, B, C, and K True/False: False 28.Class B fires are those fires that occur involving paper and wood. True/False: False 29.Multipurpose dry chemical extinguishers are effective on all classes ex- cept D and K fires. True/False: True 30.Who does NFPA strongly recommend to be notified as soon as fire is discovered?: Fire department 31.For an extinguisher to successfully function, what four conditions must be met?: 1.Located in accordance to requirements

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2. Is correct type for a fire that can occur
3. The fire is discovered while still small enough for extinguisher to be effective
4. Fire discovered by person ready, willing and able to use the extinguisher 32.Who has the ultimate obligation for the care and use of extinguishers? the or - of a property: Owner or occupant 33.Portable fire extinguishers are appliances to be used principally by whom?: Occupants of the building 34.What is the abbreviation for International System of Units?: SI 35.What does CGA stand for: Compressed Gas Association 36.What does UL stand for?: Underwriters Laboratories 37.Acceptable to the authority having jurisdiction: Approved 38.An organization office or individual responsible for enforcing the require- ments of a code or standard or for approving equipment, materials, an instal- lation or a procedure: AHJ 39.Indicates a mandatory requirement: Shall 40.Indicated a recommendation or is advised but not required: Should 41.NFPA approves equipment True/False: 42.A piece of equipment that is "labeled" indicated compliance with what: - Appropriate standards or performance in specified manner 43.An "extinguisher inspection" is a check: Quick 44."Maintenence" is a examination: thorough 45.What are the two film forming agents: AFFF FFFP 46.How does NFPA 10 define :flammable liquids of appreciable depth?: Depth greater than 1/4 in 47.Production of Halon 1211 and Halon 1301 ceased in what year: 1994 48.What is hydrostatic testing: Pressure testing of the extinguisher to verify its strength against unwanted rupture.
5. A water-based extinguishing agent that uses and alike metal salt to prevent freezing is called what?: Loaded stream charge 50.The normal operating pressure as indicated on the nameplate or cylinder of a fire extinguisher is known as the: Extinguisher service pressure 51.The pressure shown on the nameplate at which a shell was tested at time of manufacture is known as the: Factory test pressure 52.Servicing includes performing what 3 things>: Maintenance Recharging Hydrostatic Testing

7 / 53.Travel distance is the distance from any point to the nearest fire extinguisher fulfilling hazard requirements: nearest walking

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54. Although Carbon dioxide is a gas, it can be an effective extinguishing agent because it is times heavier than air: 1. 55.A high pressure cylinder contains fire extinguishing agents at a pressure higher than psi: 500 56.A low-pressure cylinder contains fire extinguishing agents at a pressure lower than psi: 500
55. Cartridge / cylinder operated fire extinguisher are different than most extin- guishers in the gas is in a separate container from the agent: expellant 58.What do you call a fire extinguisher in which the agents have sufficient vapor pressure to expel themselves?: Self expelling extinguisher 59.fire extinguishers in which both the extinguishing material and expelling gas are kept in a single container (and which have a pressure gauge) are called what?: Stored pressure extinguishers 60.Is a wheeled fire extinguisher considered a portable fire extinguisher?: Yes 61.Portable fire extinguishers shall be and and meet all of the requirements of one of the fire test standards indicated: listed and labeled 62.Extinguishers listed for the Class C rating shall not contain an agent that is a conductor of : Electricity 63.Dry chemical stored pressure extinguishers manufactured prior to shall be removed from service at the next 6 year maintenance interval or the next hydrostatic test whichever comes first: October 1984 64.Any fire extinguisher that can no longer be serviced in accordance with the manufacturers maintenance manual is considered to be and shall be from service: obsolete, removed 65.Class A fires involve: Common Combustibles such as paper, wood, cloth, rubber, plastics 66.Class B fires involve: Usually involve flammable liquids, greases, tars oils, paints, alcohols, and flammable gases 67.Class C fires involve: Usually involve live electrical equipment 68.Class D fires involve: Fires involving combustible metals such as magnesium, titanium, zirconium, sodium, and potassium. 69.Class K fires involve: cooking appliances that involve combustible cooking media (vegetable or animal oils and fats). 70.What Class extinguishers are required to have a rating number

9 / preceding the classification letter that indicates the relative extinguishing effectiveness- : Class A or B 71.Class C, D, and K extinguishers are not required to have what?: number preceding the classification letter

10 / 72.The use of a halogenated fire extinguisher shall be limited to applications where a is necessary to extinguish effectively without damag- ing the equipment OR where the use of alternative agents have the potential to cause a hazard to : clean agent personnel 73.Placement of portable fire extinguishers containing halogenated agents should conform to warnings contained on the extinguisher nameplate.: Minimum confined space volume 74.Fire extinguishers are provided to protect what two things: Building struc- ture and occupancy hazards 75.Most buildings have class hazards: A 76.Extinguishers provided for building protection shall also be considered for the protection of occupancies having a Class fire: A 77.Extinguishers with more than one letter classification are permitted to satisfy the requirements of letter class: each 78.Three dimensional Class B fires involve-pouring, running or dripping : flammable liquids 79.What is the required minimum discharge rate for a large capacity dry chemical extinguisher 10lb or greater used to protect a 3d fire?: 1lb/sec 80.How can you tell if an AFFF or FFFP type extinguisher can be used for the protection of water soluble flammable liquids such as alcohols?: They should not unless listed on nameplate 81.Class K fire extinguishers manufactured after January 1 2002 should not be equipped with what type of discharge device?: extended wand type 82.What warning language is recommended for a typical class K placard?: In case of appliance fire, use this extinguisher after fixed suppression system has been actuated 83.Delicate electronic equipment examples: data processing, computers, CAD, CAM robotics 84.What are the preferred locations for fire extinguishers?: Along normal paths of travel and exits 85.When does NFPA permit cabinets to be locked?: Subject to malicious use and include means of emergency access 86.What is the required practice for installing extinguishers in conditions where they are subject to dislodgement?: Strap type brackets 87.Fire extinguishers having a gross weight not exceeding 40lbs shall be installed so that the top of the extinguisher is no more the ft above

11 / the floor: 5

12 / 88.Fire extinguishers having a gross weight greater than 40lbs shall be in- stalled so that the top of the extinguisher is no more the ft above the floor: 3. 89.In no case shall the clearance between the bottom of the extinguisher and the floor be less than : 4in 90.HMIS, 6 year, hydrostatic test or other labels shall not be placed on what part of the extinguisher?: the front 91.What is the minimum Class A rating for a single fire extinguisher for light and ordinary hazard occupancy/: 2-A 92.For a 3000 sq ft facility, how many 2-A rated extinguishers would be required for ordinary hazard occupancy?: 2 93.What is the maximum travel distance to a Class A extinguisher?: 75ft 94.What is the minimum travel distance to a 20-B rated extinguisher in an ordinary area?: 50ft 95.How should hazard areas involving Class B fires in flammable liquids of appreciable depth that are not manned all of the time be protected?: By fixed systems 96.Travel distances for portable extinguishers used to protect flammable liquids of appreciable depth shall not exceed ft: 50 97.What action should be taken to prevent resignation of class C fire?: De- en- ergize 98.The maximum travel distance to a class D fire is______ft: 75 99.What determines the size of Class D extinguisher in class D hazards? 1.

4.: 1. Specific combustible metal 2.Physical particle size 3.Area to be covered 4.Recommendations from manufacturer

100. Maximum distance to class K extinguishers: 30ft
101. What shall not be used as the sole medium pressure testing?: Air or other gases
102. Why should air be vented prior to hydrostatic testing?: to prevent violent and dangerous failure of the cylinder
103. Test pressure gauges shall be accurate to +/- -% or better of the full range of the gauge:.
104. Test

13 / pressure gauges shall be capable of being read within % of test pressure: 1

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105. Test pressure gauges shall be capable of indicating % to % of the test pressure: 90 110
106. How often must gauges used on test equipment be calibrated?: semian- nually
107. How often must master gauges or dead weight testers be calibrated?: - annually
108. What is the maximum temp allowed in drying of tested cylinders?: 150F
109. Is it permissible to leave hose assembelies on cartridge operated fire extinguishers while hydrostatically testing them?: no