South Africa FETC: Fire and Rescue Operations Assessment (NQF 4)

In the fire tetrahedron, which element must be present in addition to fuel, heat, and oxygen to sustain a self-propagating fire?

• ACarbon dioxide
• BNitrogen gas
• CUninhibited chemical chain reaction
• DFree carbon atoms

Which of the following describes 'flashover' in compartment fire behavior?

• AA rapid explosion of flammable gases when oxygen is suddenly introduced into a ventilatio…
• BThe transition phase where all exposed combustible surfaces in a compartment are heated t…
• CThe initial ignition stage where local pyrolyzing vapors ignite.
• DA localized combustion of hot gas layers rolling across the ceiling.

What mode of heat transfer is primarily responsible for the spread of fire through the movement of superheated smoke and gases up a stairwell?

• AConduction
• BRadiation
• CConvection
• DInduction

Under South African National Standards (SANS 10105-1), which class of fire specifically covers fires involving cooking oils, fats, and greases in commercial kitchen appliances?

• AClass B
• BClass C
• CClass D
• DClass F

Which of the following is a classic indicator that a compartment fire is under ventilation-limited conditions and poses an immediate danger of a backdraft?

• AA rapidly rising column of clean, white steam.
• BPulsing, turbulent, yellowish-grey smoke puffing from doors or window cracks, combined wi…
• CA well-defined neutral plane in the middle of a doorway with rapid air inflow at the bott…
• DLight, drifting grey smoke with visible lazily rolling flames in the room.

What is 'rollover' (or flameover) in compartment fire dynamics, and what does it warn firefighters of?

• AThe collapse of the roof structure due to thermal degradation.
• BGases cooling and condensing into liquid droplets on walls.
• CThe rapid ignition of the hot gas layer at the ceiling, warning of an impending flashover.
• DThe sudden extinguishment of flames due to lack of oxygen.

What term describes the chemical decomposition of solid organic fuels through the application of heat, releasing flammable gases before actual ignition occurs?

• ASublimation
• BPyrolysis
• CCalcination
• DSaponification

How does the Lower Explosive Limit (LEL) of a gas or vapor affect its flammability hazard?

• AA lower LEL means a smaller concentration of gas in air is required to cause an explosion…
• BA higher LEL means the gas is highly unstable and will ignite spontaneously in clean air.
• CThe LEL is the temperature at which a liquid must be heated to release ignitable vapors.
• DThe LEL represents the maximum concentration of oxygen required to suppress combustion.

If a gas has a vapor density of 1.8, how will it behave when released inside an unventilated compartment?

• AIt will rise rapidly and pool near the ceiling.
• BIt will mix evenly and instantly with air at all levels.
• CIt will sink to the floor and accumulate in low-lying areas or basements.
• DIt will escape through ceiling vents due to high buoyancy.

What is 'thermal layering' (or thermal balance) in a compartment fire, and why must firefighters avoid disrupting it?

• AThe chemical separation of toxic gases based on molecular weight, which prevents toxic ex…
• BThe physical stratification of hot smoke and gases at the ceiling and cooler air near the…
• CThe freezing of water layers on structural members during winter firefighting.
• DThe equal distribution of heat from the floor to the ceiling.

According to South African SANS/SABS standards, Class C fires involve which of the following materials?

• ACombustible metals
• BFlammable liquids
• CFlammable gases
• DLive electrical equipment

What is the primary mechanism of toxicity of Carbon Monoxide (CO) in human blood during smoke inhalation?

• AIt physically burns the lung tissues on contact, causing chemical pneumonia.
• BIt binds to hemoglobin with an affinity 200 times greater than oxygen, forming carboxyhem…
• CIt paralyzes the diaphragm, causing immediate respiratory arrest.
• DIt depletes the body's blood sugar, causing a diabetic coma.

What does the acronym 'BLEVE' stand for, and what hazard does it represent to firefighters on the fire ground?

• ABasic Life Support Emergency Vehicle; represents traffic collision risks.
• BBoiling Liquid Expanding Vapor Explosion; represents a catastrophic failure of a pressuri…
• CBreathing Liquid Evacuation Venting Equipment; represents an SCBA malfunction.
• DBuilding Limit Evacuation Velocity Estimation; represents structural collapse timing.

How does the surface-area-to-volume ratio of a solid fuel affect its ignition and combustion characteristics?

• AA smaller surface-area-to-volume ratio allows the fuel to ignite much faster.
• BThe ratio has no effect on ignition; only the chemical composition determines flammabilit…
• CA larger surface-area-to-volume ratio allows the fuel to absorb heat faster and ignite mu…
• DLarger ratios cause the fuel to undergo spontaneous ignition without any heat source.

Which of the following temperatures is defined as the 'fire point' of a liquid fuel?

• AThe minimum temperature at which a liquid gives off enough vapor to form an ignitable mix…
• BThe temperature at which a liquid boils and changes completely into a gas state.
• CThe minimum temperature at which a liquid produces sufficient vapors to support continuou…
• DThe temperature at which a liquid fuel will ignite spontaneously in the absence of an ign…

Under SANS 10090 standards for community fire safety in South Africa, what is the required inspection frequency and standard indicator for identifying municipal fire hydrants?

• AThey must be inspected every 5 years and painted green.
• BThey must be inspected at least once a year, kept clear of obstructions, and typically ma…
• CThey require no inspection as they are self-maintaining.
• DThey are inspected weekly by the police department.

What is the standard internal diameter of a primary attack hose line used by municipal fire services in South Africa for interior structural firefighting?

• A25 mm
• B45 mm
• C65 mm
• D100 mm

What is the recommended standard nozzle pressure for a typical constant-gallonage fog nozzle to achieve its designed flow rate and stream pattern?

• A200 kPa (2 bar)
• B500 kPa (5 bar)
• C1000 kPa (10 bar)
• D2000 kPa (20 bar)

What is 'water hammer', and what operational practice must firefighters follow to prevent it?

• AThe freezing of water in a pump during operation; prevented by keeping pump valves open.
• BA physical shock wave created when water flow is stopped suddenly; prevented by opening a…
• CThe sound of water hitting metal siding; prevented by using fog patterns.
• DThe use of high-pressure streams to break down brick walls; prevented by adjusting nozzle…

Which of the following sets of factors will result in the greatest increase in friction loss inside a fire hose layout?

• AIncreasing hose diameter, decreasing flow rate, and shortening the hose.
• BDecreasing hose diameter, increasing flow rate, and increasing the length of the hose lay…
• CKeeping hose diameter constant while reducing the pump pressure.
• DReplacing rubber-lined hoses with smooth plastic conduits.

When applying firefighting foam to a hydrocarbon fuel spill fire, what is the purpose of the 'expansion ratio'?

• AIt measures the rate at which the foam chemical degrades over time.
• BIt represents the ratio of the volume of finished foam produced to the volume of the orig…
• CIt represents the ratio of foam concentrate to water in the premix solution.
• DIt measures the expansion of the fuel tank under thermal pressure.

For effective Positive Pressure Ventilation (PPV), where should the ventilation blower/fan be positioned relative to the entry opening?

• AInside the structure, pointing directly out of the nearest window.
• BAt least 10 meters away, directed sideways to create a vortex.
• COutside the structure, at a distance where the cone of air from the fan completely covers…
• DDirectly inside the doorway to seal the opening completely.

When performing vertical ventilation on a flat or pitched roof of a burning commercial building, where should the ventilation hole be cut?

• AAs low as possible on the windward side of the roof.
• BAt the highest point of the roof, directly above or as close as safe to the seat of the f…
• CDirectly over the main exit door of the building.
• DAt the corner furthest away from the fire to protect the roof.

According to South African SANS 10105-1, what is the required maintenance frequency for portable fire extinguishers in commercial and public buildings?

• AEvery month by the local fire department.
• BAt least once every 12 months (annually) by a registered SABS 1475 competent person.
• COnly when the pressure gauge needle enters the red zone.
• DEvery 5 years during building insurance renewals.

Why is a Dry Chemical Powder (DCP) extinguisher containing monoammonium phosphate (MAP) classified as 'multi-purpose' (Class A, B, C) in South Africa?

• ABecause it turns into water when exposed to temperatures above 50 degrees Celsius.
• BBecause the chemical melts when exposed to Class A fires, forming a solid coating that sm…
• CBecause it is completely non-toxic and can be used to extinguish cooking oil fires.
• DBecause it conducts electricity, helping to ground live electrical systems.

What is the primary operational advantage of using a 'fog stream' compared to a 'solid stream' on a compartment fire?

• AFog streams have greater reach and wind resistance.
• BFog streams have a much larger surface area, which maximizes heat absorption, steam conve…
• CFog streams produce less steam, preventing burns to the hose crew.
• DFog streams penetrate deep into tightly packed class A materials like hay bales.

What is the purpose of a 'donut roll' when packing and storing fire hoses?

• ATo trap air inside the hose to make it float during water rescues.
• BTo ensure the male coupling is protected inside the roll, while allowing both couplings t…
• CTo allow the hose to be rolled up while still pressurized.
• DTo prevent the hose from absorbing moisture from the ground.

What is the key difference between a 'Wye' appliance and a 'Siamese' appliance on the fire ground?

• AA Wye merges two lines into one; a Siamese splits one line into two.
• BA Wye splits one hose line into two or more lines; a Siamese merges two or more hose line…
• CA Wye is only used with foam; a Siamese is only used with water.
• DA Wye is a type of nozzle; a Siamese is a type of pump.

In many South African municipalities, fire hydrants are underground bayonet-type valves. What specialized tool must a firefighter use to access and operate these hydrants?

• AA hydrant spanner only
• BA standpipe, hydrant key, and bar
• CA hydraulic spreader
• DA pickhead axe

Which foam application method involves directing the foam stream onto the ground or a vertical surface in front of a burning liquid spill, allowing it to gently flow over the fuel?

• ARain-down method
• BRoll-on (or bounce-off) method
• CDirect injection method
• DSub-surface injection method

What is the primary benefit of using Class A foam on structural or wildland fires?

• AIt coats the fuel with a gas-tight membrane that lasts for several weeks.
• BIt reduces the surface tension of water, allowing it to penetrate deeply into Class A fue…
• CIt is completely non-conductive, allowing safe use on high-voltage substations.
• DIt acts as a chemical retardant that stops pyrolysis permanently.

How should a firefighter position and adjust a fog nozzle to perform 'hydraulic ventilation' after a room fire has been knocked down?

• AUse a solid stream directed at the floor from the middle of the room.
• BStand inside the room, select a wide fog pattern that covers 85-90% of a window opening,…
• CStand outside and spray a fog stream into the room through the window.
• DSet the nozzle to a narrow fog pattern and spray the ceiling to condense smoke.

In high-rise fire operations, what is the critical difference between a 'wet riser' (wet standpipe) and a 'dry riser' (dry standpipe) system?

• AA wet riser is only used for drinking water; a dry riser is for firefighting.
• BA wet riser is permanently filled with water from a pressurized supply; a dry riser is em…
• CA wet riser is made of plastic pipes; a dry riser is made of steel.
• DA wet riser requires no maintenance; a dry riser must be inspected daily.

What is the primary cause of organic mildew and rot damage to canvas-jacketed fire hoses, and how is it prevented?

• AExposing the hose to direct sunlight; prevented by storing hoses in dark boxes.
• BStoring the hose while it is still wet or damp after use; prevented by thoroughly cleanin…
• CUsing high-pressure streams; prevented by limiting pump pressure.
• DExposure to chemical foams; prevented by only using plain water.

When drafting water from a static source (such as a swimming pool or farm dam), what is the practical limit of vertical lift for most fire department pumpers?

• AApproximately 3 meters
• BApproximately 6 to 7 meters
• CApproximately 15 meters
• DApproximately 30 meters

What is the standard full working pressure of a typical carbon-composite Self-Contained Breathing Apparatus (SCBA) cylinder used by modern fire services in South Africa?

• A100 bar (10 MPa)
• B200 bar (20 MPa)
• C300 bar (30 MPa)
• D600 bar (60 MPa)

Under what specific condition should a firefighter open the bypass valve on their SCBA regulator?

• AWhen they need to talk to their partner and want to save air.
• BWhen the demand valve regulator fails to supply air during inhalation, or if the facepiec…
• CDuring routine operations to cool their face.
• DOnly when the cylinder pressure drops below 50 bar.

At what point is the low-pressure warning whistle or alarm on an SCBA cylinder designed to activate, warning the firefighter that they must exit?

• AWhen the cylinder is at 50% capacity (150 bar).
• BWhen the cylinder pressure drops to approximately 50-60 bar (typically 20-25% of full wor…
• COnly when the cylinder is completely empty (0 bar).
• DWhen the temperature outside the cylinder exceeds 100 degrees Celsius.

How must a firefighter perform the 'negative pressure test' on their SCBA facepiece before entering a toxic atmosphere?

• ABlow hard into the mask to see if air leaks out of the temples.
• BPlace their hand over the regulator inlet connection (or disconnect the regulator and sea…
• CClose the cylinder valve and breathe until the mask collapses slightly, then hold their b…
• DSpray water on the mask to check for bubbles.

Under what condition will a firefighter's Personal Alert Safety System (PASS) device activate its full audio and visual alarm to locate them?

• AImmediately when the SCBA cylinder valve is opened.
• BWhen the ambient temperature rises above 60 degrees Celsius.
• CIf the firefighter remains motionless for approximately 30 seconds.
• DIf the firefighter starts running or climbing stairs rapidly.

What is the primary function of the 'moisture barrier' layer in a structural firefighting turnout coat?

• ATo make the coat look glossy and reflect radiant heat.
• BTo prevent liquid water, steam, bloodborne pathogens, and liquid chemicals from penetrati…
• CTo absorb water from hoses to keep the firefighter cool.
• DTo act as a secondary flotation device during water operations.

How do steam burns occur under structural firefighting PPE, even when the outer shell is undamaged?

• ABy direct contact with burning embers that pass through the fabric.
• BWhen moisture (from sweat or wet gear) inside the garment is rapidly heated by high exter…
• CDue to a chemical reaction between the moisture barrier and the oxygen cylinder.
• DWhen the firefighter inhales hot gases through a faulty SCBA valve.

When conducting a primary search in a zero-visibility, smoke-filled residential structure, why is it critical to maintain continuous contact with a wall or search line?

• ATo prevent structural collapse of the ceiling.
• BTo maintain orientation, map the search pattern, and ensure a reliable path back to the e…
• CTo detect electrical currents running through the walls.
• DBecause heat is lowest directly against the walls.

What is the safest and most effective method for moving an unconscious, heavy victim out of a high-heat, smoke-filled corridor?

• ALifting them onto the shoulders in a fireman's carry.
• BUsing an incline drag or webbing drag, keeping the victim as low to the floor as possible.
• CRolling them repeatedly along the ground.
• DWalking them upright between two firefighters.

What is the primary directive of the 'Rule of Air Management' (ROAM) for firefighters operating in an IDLH environment?

• AYou must consume all the air in your cylinder before calling for help.
• BYou must monitor your air consumption and begin exiting the IDLH environment before your…
• CYou must share air with your partner using buddy breathing at all times.
• DYou must turn off your cylinder valve when stationary to conserve air.