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BOF Mod B Exam (2024/ 2025 Update) Questions and Verified Answers| Grade A| 100% Correct

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BOF Mod B Exam (2024/ 2025 Update) Questions and Verified Answers| Grade A| 100% Correct Q: Which circular saw blade is susceptible to damage from gasoline vapors? Answer: Masonry Q: Which is one of the four major categories of door locks? Answer: Cylindrical Q: Which is the correct way to force a single- or double-hung window? Answer: Pry upward on the center of the bottom sash Q: Which method should be considered first when forcing an outward-swinging door? Answer: Removing the hinge pins Q: Which part of a door lock catches and holds the door frame? Answer: Latching device Q: Which tool is designed for both cutting and prying? Answer: Pry axe Q: Which type of circular saw blade is specially designed to cut through hard surfaces or wood? Answer: Carbide-tipped Q: According to recent UL and NIST fire research, which is a likely outcome of improperly performed ventilation at a ventilation-controlled fire? Answer: Rapid fire growth Q: All forms of ventilation that use fans or other powered equipment are classified as __________ ventilation. Answer: mechanical Q: An offensive attack initiated by a quick, exterior, indirect attack into the fire compartment followed by an interior direct fire attack for final suppression is a(n) __________ attack. Answer: transitional Q: Application of water streams into a structure from the outside will have which effect? Answer: Reduced temperatures in many parts of the structure Q: For natural ventilation, which window should be opened first? Answer: The downwind window Q: In which case does a larger vertical ventilation opening improve interior conditions better than a smaller opening? Answer: When combined with coordinated water application Q: Positive-pressure ventilation is the least suitable approach for which situation? Answer: Fire in structural void spaces Q: What does fast-moving smoke indicate? Answer: Very hot fire Q: What is the greatest risk to fire fighters performing vertical ventilation? Answer: Roof collapse Q: What is the minimum measurement for a ventilation-opening cut in a roof? Answer: 4 ft by 4 ft (1.2 m by 1.2 m) Q: What is the phenomenon in which smoke hangs low to the ground on a calm, cool, damp day? Answer: Smoke inversion Q: When faced with signs of impending flashover, which action should be taken first? Answer: Initiate transitional attack

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BOFlModlBlExaml(Update)lQuestionslandl
VerifiedlAnswers|lGradelA|l100%lCorrect

Q:lWhichlcircularlsawlbladelislsusceptibleltoldamagelfromlgasolinelvapors?

Answer:
lMasonry




Q:lWhichlisloneloflthelfourlmajorlcategorieslofldoorllocks?

Answer:
lCylindrical




Q:lWhichlislthelcorrectlwayltolforcelalsingle-lorldouble-hunglwindow?

Answer:
lPrylupwardlonlthelcenterloflthelbottomlsash




Q:lWhichlmethodlshouldlbelconsideredlfirstlwhenlforcinglanloutward-swingingldoor?

Answer:
lRemovinglthelhingelpins




Q:lWhichlpartloflaldoorllocklcatcheslandlholdsltheldoorlframe?

,Answer:
lLatchingldevice




Q:lWhichltoollisldesignedlforlbothlcuttinglandlprying?

Answer:
lPrylaxe




Q:lWhichltypeloflcircularlsawlbladelislspeciallyldesignedltolcutlthroughlhardlsurfaceslorlwoo
d?


Answer:
lCarbide-tipped




Q:lAccordingltolrecentlULlandlNISTlfirelresearch,lwhichlislallikelyloutcomeloflimproperlylp
erformedlventilationlatlalventilation-controlledlfire?


Answer:
lRapidlfirelgrowth




Q:lAlllformsloflventilationlthatluselfanslorlotherlpoweredlequipmentlarelclassifiedlasl_______
___lventilation.


Answer:
lmechanical

,Q:lAnloffensivelattacklinitiatedlbylalquick,lexterior,lindirectlattacklintolthelfirelcompartmentlf
ollowedlbylanlinteriorldirectlfirelattacklforlfinallsuppressionlisla(n)l__________lattack.


Answer:
ltransitional




Q:lApplicationloflwaterlstreamslintolalstructurelfromltheloutsidelwilllhavelwhichleffect?

Answer:
lReducedltemperatureslinlmanylpartsloflthelstructure




Q:lForlnaturallventilation,lwhichlwindowlshouldlbelopenedlfirst?

Answer:
lTheldownwindlwindow




Q:lInlwhichlcaseldoeslallargerlverticallventilationlopeninglimprovelinteriorlconditionslbetterlt
hanlalsmallerlopening?


Answer:
lWhenlcombinedlwithlcoordinatedlwaterlapplication




Q:lPositive-pressurelventilationlislthelleastlsuitablelapproachlforlwhichlsituation?

Answer:
lFirelinlstructurallvoidlspaces

, Q:lWhatldoeslfast-movinglsmokelindicate?

Answer:
lVerylhotlfire




Q:lWhatlislthelgreatestlriskltolfirelfighterslperforminglverticallventilation?

Answer:
lRooflcollapse




Q:lWhatlislthelminimumlmeasurementlforlalventilation-openinglcutlinlalroof?

Answer:
l4lftlbyl4lftl(1.2lmlbyl1.2lm)




Q:lWhatlislthelphenomenonlinlwhichlsmokelhangsllowltolthelgroundlonlalcalm,lcool,ldampld
ay?


Answer:
lSmokelinversion




Q:lWhenlfacedlwithlsignsloflimpendinglflashover,lwhichlactionlshouldlbeltakenlfirst?

Answer:
lInitiateltransitionallattack

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