NFPA 10 Exam 71 Questions with Verified Answers
When should wheeled fire extinguishers be considered? - CORRECT ANSWER • High hazard areas are present.
• Limited available personnel are present.
Requiring: High agen
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NFPA 10 Exam 71 Questions with Verified Answers
When should wheeled fire extinguishers be considered? - CORRECT ANSWER • High hazard areas are present.
• Limited available personnel are present.
Requiring: High agent flow rate, Increased agent stream range, increased agent capacity
NON-DOT low pressure fire extinguisher cylinders that pass a hydrostatic test shall have the following recorded on a label: - CORRECT ANSWER • Month and year test was performed (perforated)
• Test pressure used
• Name or initials of tester and name of company/agency performing the test
20% of all electronic monitoring device/systems shall be tested ____________ on a ____________ basis so that all units are tested within a ___________ period - CORRECT ANSWER • ANNUALLY
• ROTATING
• 5- YEAR
When an extinguisher cylinder is required to be condemned the re-tester shall: - CORRECT ANSWER Notify the owner in writing that the cylinder is condemned and cannot be reused.
Fire extinguishers installed in vehicles or under other conditions where they are subject to dislodgment shall be ___________ - CORRECT ANSWER Installed in approved strap-type brackets specifically designed for this application.
Class K fire extinguishers manufactured after January 1, 2002 shall not be equipped with ___________. - CORRECT ANSWER Extended wand-type discharge devices
Fire extinguishers mounted in cabinets or wall recesses shall be placed so ____________. - CORRECT ANSWER The fire extinguisher's operating instructions face outward
High pressure accessory hose used on wheeled extinguishers shall be tested at __________. - CORRECT ANSWER 3000 psi
Class A
Extra Hazard Occupancy maximum travel distance to extinguisher - CORRECT ANSWER 75 ft
Each extinguisher that has undergone maintenance that includes internal examination shall have a ________ located_________. - CORRECT ANSWER • Verification of service collar
• Around the neck of the container
Fire extinguishers containing only plain water shall be protected to temps as low as __________ by the addition of ________ - CORRECT ANSWER -40 Degrees Fahrenheit (-40 Degrees Celsius)
An anti-freeze stipulated on the nameplate.
Cabinets or wall recesses for fire extinguishers shall be installed so that __________. - CORRECT ANSWER The extinguisher's mounting heights are met.
Electronic monitoring device/system components shall be tested and maintained ____________.
Tested components
Included as a minimum: - CORRECT ANSWER Annually
Power supply inspection/battery charge
Obstruction sensor inspection
Location sensor inspection
Pressure indicator inspection
Connection continuity inspection.
Stored pressure types of fire extinguishers containing a loaded stream agent shall be disassembled on ____________ AND _____________ - CORRECT ANSWER An annual basis
Subjected to complete maintenance
Class A
Up to one and a half of the complement of fire extinguishers can be replaced by ___________. - CORRECT ANSWER Uniformly spaced 1.5 Inch hose stations for use by the occupants.
Film-Forming Foam Agents - CORRECT ANSWER Aqueous film-forming foam (AFFF) film forming fluoroprotein foam (FFFP)
6 year internal examination label shall be affixed to the shell by___________ and any previous 6 year labels shall be ____________ - CORRECT ANSWER A heatless process
Removed
Flammable Liquids of Applicable Dept.
Scattered of widely separated hazards shall be ___________ - CORRECT ANSWER Individually Protected
If a wet chemical or water mist extinguisher is partially discharged, _______________ - CORRECT ANSWER All remaining chemical or water mist shall be discarded.
Class B
The protection requirements shall be permitted to be fulfilled with fire extinguishers of higher rating, provided _________________ - CORRECT ANSWER The travel distance does not exceed 50 ft
Where fire extinguishers have more than one rating (eg. 2-A; 20-B;C) they shall ____________________ - CORRECT ANSWER Be permitted to satisfy the requirements of each letter class
List obsolete extinguishers - CORRECT ANSWER Soda Acid
Chemical Foam
Vaporizing Liquid
Cartridge- operated water
Cartridge- operated loaded stream
Copper or brass shell
Carbon dioxide w/ metal horns
Solid charge- Type AFFF
Pressurized water manufactured before 1971
Any that needs to be inverted to operate
Store pressure manufactured before 1955
4B,6B,8B,12B + 16B fire ratings
Stored-pressure water w/ fiberglass shells (pre-1976)
Extinguisher mounting device designed for mounting a specific model onto stationary vertical surfaces - CORRECT ANSWER Extinguisher hanger
Internal examination interval of dry chemical stored-pressure extinguishers with mild steel, brazed brass or aluminum shells. - CORRECT ANSWER 6 years
A fire extinguisher in which the agent has sufficient vapor pressure at normal operating temperatures to expel itself - CORRECT ANSWER Self- Expelling Fire Extinguisher
A fire extinguisher in which the expellant gas is in a separated container from the agent storage container - CORRECT ANSWER Cartridge/Cylinder- Operated Fire Extinguisher
Class A
Fire extinguishers of lesser rating shall be permitted to be installed but ____________ - CORRECT ANSWER Shall NOT be considered as fulfilling Class A Hazards size and placement requirements
(Some exceptions are made)
Test pressure gauges shall be capable of indicating ___________ of the test pressure. - CORRECT ANSWER 90% to 110%
Fire extinguishers and Class D extinguishing agents shall be inspected at least ________________ - CORRECT ANSWER One per calendar month
Class B
Basic minimum extinguisher rating for ordinary hazard - CORRECT ANSWER 10-B
20-B
A concentrate which, when added to water reduces the surface tension + increases its ability to penetrate and spread - CORRECT ANSWER Wetting agent
Factors in selection of fire extinguishers include: - CORRECT ANSWER Type of fire most likely
Size of fire most likely
Hazards in area
Energized electrical equipment in vicinity
Ambient temperature conditions
The hose shall be _______________ before hydrostatic testing - CORRECT ANSWER Completely filled with water
Pump tank water and pump tank calcium chloride- based antifreeze types of extinguishers shall be recharged every ______________ - CORRECT ANSWER 12 months
Which extinguishers require having a rating number preceding the classification letter - CORRECT ANSWER Class A or Class B
Hose stations shall comply with..... - CORRECT ANSWER NFPA 14
Hydrostatic testing intervals for AFFF and FFFP extinguishers - CORRECT ANSWER 5 years
Fire extinguishers removed from service for maintenance or recharging shall be - CORRECT ANSWER replaced by a suitable fire extinguisher (for type of hazard) be protected and be of at least equal rating
electronic monitoring - CORRECT ANSWER A method of electronic communication (data transmission) between an in-place fire extinguisher and an electronic monitoring device/system
The agent in stored pressure wetting fire extinguishers shall be replaced..... - CORRECT ANSWER annually
The amount of recharge agent shall be verified by...... - CORRECT ANSWER weighing
Carbon dioxide has assembles requiring a hydrostatic pressure test shall be tested at - CORRECT ANSWER 1250 psi
Recharging - CORRECT ANSWER The replacement of the extinguishing agent (also includes the expellant for certain types of fire extinguishers)
If an area of a floor of a building is less than requirements - CORRECT ANSWER at least 1 fire extinguisher of minimum size required shall be provided
Conductiuity Testing label shall include what information? - CORRECT ANSWER - month and year indicated by perforation
- Name or initials of the person performing the test
- the name of the agency performing the test
Hydrostatic Test intervals for Carbon Dioxide and Wet Chemical Extinguishers - CORRECT ANSWER 5 years
Class A:
Extra Hazard Occupancy MAXIMUM floor area per unit of A. - CORRECT ANSWER 1000 square feet
Hydrostatic Test Interval:
Dry Chemical, Cartridge or Cylinder Operated, with Mild Steel Shells - CORRECT ANSWER 12 years
Internal Examination Interval of FFFP (Film-Forming Fluoroprotein Foam) extinguishers - CORRECT ANSWER 3 years (with the replacement amount of the extinguisher agent)
During hydrostatic testing, any _____________ shall be cause for rejection - CORRECT ANSWER distortion of the cylinder
The connection to the electronic monitoring device shall be ________ for integrity - CORRECT ANSWER Continuously superuised
Where manual inspections were conducted, the ____________ the inspection was performed and the _________ shall be recorded. - CORRECT ANSWER - Month and Year
- Initials of the person performing the inspection
The ___________________ of a property in which extinguishers are located shall be responsible for inspection, maintenance, and recharging. - CORRECT ANSWER Owner, Designated Agent, or Occupant
Which type of fire extinguishers should NOT be used for Water- Soluble Flammable Liquid Fires (Polar solvents) unless specifically referenced on the nameplate? - CORRECT ANSWER Aqueous film-forming foam (AFFF)
Film- forming flouroprotein foam (FFFP)
Rechargeable (Refillable) Fire Extinguisher - CORRECT ANSWER A fire extinguisher capable of undergoing complete maintenance including internal inspection of the pressure vessel, replacement of all substandard parts and seals, abd hydrostatic testing
Nonrechargeable (nonrefillable) Fire Extinguisher - CORRECT ANSWER A fire extinguisher that is intended to be used one time and not capable of or intended to be recharged and returned to service.
Fire extinguishers shall be marked with the following - CORRECT ANSWER - Identification of the listing and labelling organization
- Product category indicating type of extinguisher
- Extinguisher Classification (Section 5.3)
- Performance and Fire Test Standards that the extinguisher meets or exceeds.
The use of water or any other additives shall be prohibited in ___________________ - CORRECT ANSWER Wetting Agent Extinguishers
Servicing - CORRECT ANSWER Performing maintenance, recharging, or hydrostatic testing on a fire extinguisher
High Pressure Cylinder - CORRECT ANSWER Cylinders (and cartridges) containing nitrogen, compressed air, carbon dioxide, or other gases at a pressure higher than 500 psi at 70 degrees Fahrenheit 21 degrees Celcius
Calcium Chloride solutions shall not be used in ________________. - CORRECT ANSWER Stainless Steel fire extinguishers
High-pressure cylinder and cartridges hydrostatic test stamping shall be placed only on_____________________. - CORRECT ANSWER The shoulder
Top
Head
Neck
Foot ring off the cylinder or in accordance with 49 CFR 180.213 (c)(I)
The removal of agent from Halon Agent Fire Extinguishers shall only be done using __________________. - CORRECT ANSWER a listed halon closed recovery system
Six year internal examination labels shall be of the ______________ type. - CORRECT ANSWER Self- Destruction
The location of all couplings shall be __________________ prior to hydrostatic testing - CORRECT ANSWER marked
Only standard industrial- grade nitrogen with a maximum dew point of _______________, shall be used to pressure stored-pressure extinguishers using nitrogen as a propellant. - CORRECT ANSWER - 60 degrees Fahrenheit
Water Mist Fire Extinguisher - CORRECT ANSWER A fire extinguisher containing distilled or de-ionized water and employing a nozzle that discharges the agent in a fine spray.
Fire extinguishers containing water-based agents that have a conductivity higher than __________________ shall be considered a conductor of electricity and therefore shall not be rated class C - CORRECT ANSWER 1.00 uS/cm @ 25 degrees Celcius (77 degrees Fahrenheit)
Light hazard classification are where............. - CORRECT ANSWER - Quantity and combustibility of class A and B materials are low and fire with relatively low rate of heat release are expected.
- Total quantity of class B flammables typically expected is less than 1 gal in any room or areas
Stored-pressure fire extinguisher - CORRECT ANSWER a fire extinguisher in which both the extinguishing agent and expellant gas are kept in a single container and that includes a pressure indicator or gauge
For flammable liquid hazards of appreciable dept. a class B fire extinguisher shall be provided on the basis of at least _______________ of class ______________ extinguishing potential per __________________________ of flammable liquid surface of the _____________________ hazard area. - CORRECT ANSWER - 2 Numerical Units
- B
- 1 square foot
- Largest
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