DC 308 EXAM QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026

DC 308 EXAM QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026 what is the 4th requirement needed for flames to exist in a fire? - Answers an uninhibited chemical chain reaction what work to interrupt the chemical chain reaction? - Answers halon and dry chemical extinguishing agents class A fires - Answers wood and wood products, cloth, textiles and fibrous materials, paper and paper products what extinguishes class A fires? - Answers water in a straight or fog pattern what extinguishes a class A fire if it is deep seated? - Answers AFFF, and can be used as a penetrating agent to extinguish the fire What helps to identify a class A fire? - Answers white smoke with ashes Class B fires - Answers flammable and combustible liquids (gas, diesel fuels, jet fuels, hydraulic fluids and lube oil) can also involve flammable gasses (acetylene which should not be extinguished unless the flow of gas can be secured) What is used to extinguish class B fires? - Answers normally extinguished with AFFF What is the single most important step in extinguishing a class B fire? - Answers securing the fuel source What characterizes a class B fire? - Answers black smoke, white smoke, door cool to touch what discharged will indicate that a class B fire is our? - Answers halon or AFFF in a space Class C fires - Answers energized electrical fires that should be attacked at prescribed distances What Is the most effective tactic to de-energize and handle a class C fire? - Answers class A fire What is an extinguishing agent for class fires? - Answers CO2 and water fog at prescribed distances What should you do if a class C fire is not deep seated? - Answers clean objects that pose no clean up problem (CO2) how is water fog applied to a class C fire? - Answers in a narrow 'V' pattern and the nozzleman should be a distance of 4-6ft from fire What characterizes a class C fire? - Answers white smoke with a blue flame Class D fires - Answers combustible metals such as magnesium and titanium what is the extinguishing agents for a class D fire? - Answers water in quantity using a fog pattern what are risks involved with applying water to class D fires? - Answers small explosions so the firefighter should stand safe distances away from fire or stand behind a shelter what are normally associated with class D fires? - Answers metal fires and aircraft wheel structures What should the hose team do prior to accessing a space that is filled with smoke? - Answers go 'on air' What should the hose team do before accessing a space with individually dogged doors? - Answers start with the hinged side first What should the hose team do before accessing a space with ATD? - Answers start with the top dog, the bottom, and then the middle When accessing a space, who from the hose team should be placed at the entry side of door? - Answers nozzleman What should the hose team do to prevent becoming overheated from smoke and increase visibility? - Answers stay low Who should stay informed of the status of the fire at all times? - Answers on scene leader (fire out, class of fire, fire engaged) Who from the hose team is responsible for keeping their eyes on the fire at all times? - Answers nozzleman What type of vari-nozzle does the ship use? - Answers 95gpm on firestations in the skin of the ship how many patterns does the vari-nozzle use? - Answers 4 What are the 4 patterns of the vari-nozzle? - Answers -straight stream -narrow V -wide V -flush vari-nozzle straight stream - Answers used for overhaul and to break up debris vari-nozzle narrow V - Answers main fire pattern with a max effective range of 20ft vari-nozzle wide V - Answers used to cool ammunition, knock down rising flames, cool bulkheads, provide heat shield for hose team, de-smoke spaces adjacent to the weather deck vari-nozzle flush - Answers used to clear the hose of debris not used as a firefighting pattern are hose team members allowed to be in a space longer than their SCBA will allow? - Answers no What is a good practice to prevent heat exhaustion or stress of team members? - Answers rotate every 2 min why may the evacuation of the hose team be necessary? - Answers when the hose ruptures or the fire becomes out of control and this must be done under the team leader's discretion What should be done if the hose ruptures? - Answers evacuate space, switch hose, retest agent, re-enter the space how must a hose team member evacuate a space? - Answers backward, using the hose as a guide and keeping the team leader informed. What is the order when accessing a vertical trunk? - Answers nozzleman, lower charged hose, then the team leader what should be done if a vertical trunk cannot be accessed? - Answers use the applicator for indirect firefighting What should be done if there is no applicator available for combatting a fire in a vertical trunk? - Answers if there is a scuttle on the hatch attach the hose, and if there is no scuttle is available, with the CO's permission a whole may be cut into the deck Naval Firefighter's Thermal Imager (NFTI) MOD 2 Talisman - Answers -investigates reported fires -locate the seat of the fire -locate and guide rescuers to injured personnel -set and maintain fire boundaries -locate ignition sources during fire overhaul What indicates battery life? - Answers 10bars at the bottom of the screen and uses rechargeable batteries that provide 4.85 hours of operation. also uses AA backup batteries for an additional 3.0 hours of operation NFTI 'VO" - Answers video overlay used for allowing the firefighters to see thing in a normal visible format much like a video format NFTI digital pyrometer - Answers gives temperature reading of items in its crosshairs NFTI tactical zoom - Answers magnifies thermal images of objects to twice its size. zoom is located on the back right side of the camera Overhaul - Answers should be commenced at the access point of the space that contained the fire what are common hot spots for fires during the overhaul? - Answers lagging, ventilation and cableways When is overhaul complete? - Answers when the source is identified and overhauled hy are ventilation system fires dangerous? - Answers because of the amount of oxygen that is present with in them and the rapid speed that can a fire can spread how do you overhaul a class A fire? - Answers using short bursts of straight stream mixed with a rake, shovel, halogen tool etc. how do you overhaul a class B fire? - Answers placing a 2" layer of AFFF over the source of the fire (hazmat cleans the AFFF, do not mix with fuel) How are Class C fires overhauled? - Answers by electricians using a damaged equipment checklist. estimated time of repairs must be reported to on scene leader How do you overhaul class D fires? - Answers using large amounts of water, sand, or jettison under CO's permission RAM Fan 2000 - Answers -uses 150psi fm pressure -35lb -axial flow, centrifugal flow, water driven