AHFD Mid Term

Positive pressure ventilation is applied to a building at ground level through the use of one or more: A. Blowers B. Exit points C. Entry points D. Smoke ejectors

A. Blowers

HVAC equipment in Windowless buildings may cause spread of smoke, heat, and fire unless specifically: A. Designed for this purpose. B. Inspected for high occupancy. C. Designed to cool building only. D. Inspected prior to a fire occurring.

A. Designed for this purpose.

Which type of nozzle can be adjusted, resulting in different patterns? A. Fog B. Bresnan C. Stacked tip D. Smooth bore

A. Fog

Sufficient heat during flaming combustion causes fuel and oxygen to form: A. Free radicals and initiates a reaction. B. Stable product and initiates a reaction. C. Free radicals and interferes with a reaction. D. Stable product and interferes with a reaction.

A. Free radicals and initiates a reaction.

Which of the following should be done to prevent injury when using a saw? A. Maintain situational awareness B. Keep blades dull to prevent chipping C. use a combination of tools with saws D. wear two pairs of gloves when operating

A. Maintain situational awareness

Salvage operations may be conducted while suppression activities are underway if the situation permits and: A. On scene resources are sufficient. B. Content of the structure are valuable. C. The fire can be extinguished within fifteen minutes. D. Weather will have no impact on Fire fighting opeeations.

A. On scene resources are sufficient.

Which type of nozzle can be used to effectively control fires in concealed spaces? A. Piercing B. Stacked tip C. Smooth bore D. Adjustable fog

A. Piercing

Which mechanical ventilation methods uses higher pressure inside a building to force smoke through openings to the lower pressure area outside? A. Positive pressure ventilation B. Positive hydraulic ventilation C. Negative Pressure ventilation D. Negative hydraulic ventilation

A. Positive pressure ventilation

Detailed plan of step be step action for conducting policy. A. Procedure B. Policy C. Standard D. Code

A. Procedure

Which type of hose lay is the most expedient if the apparatus must stay at the water source? A. Reverse lay B. Forward lay C. Apparatus lay D. Combination lay

A. Reverse lay

Which of the following construction types is considered to be the most collapse resistant? A. Type I B. Type II C. Type IV D. Type V

A. Type I

Floating strainers can draft water from sources as shallow as: A. 12 inches (300mm) B. 24 inches (600mm) C. 36 inches (900mm) D 48 inches (1200mm)

B. 24 inches (600mm)

Firefighters must be especially aware of checking the attic and basement for fire extension in structures using: A. Masonary foundation l. B. Balloon construction. C. Structures with mezzanines or upper floor. D. Old lath and Plaster wall and ceiling construction.

B. Balloon Construction

Isolation and control valves are usually constructed of: A. PVC B. Brass C. Plastic D. Aluminum

B. Brass

Which of the following makes faster, rougher cuts when breaching a floor? A. Axe B. Chain saw C. Rotary saw D. Cutting torch

B. Chain saw

Which of the following is a hydrant that receives water from only on direction: A. Limited hydrant B. Dead end hydrant C. Circulating hydrant D. Unidirectional hydrant

B. Dead end hydrant

Which of the following statements about fog streams is MOST accurate? A. Fog streams have longer reach than straight stream. B. Fog streams may be used to cool the hot fire gas layer. C. Fog streams are less affected by wind than are solid streams. D. Fog streams are more likely to conduct electricity than solid streams.

B. Fog streams may be used to cool the hot fire gas layer.

Which of the following fire streams is supplied by 1 and 1/2 to 3 Inch (38mm to 77mm) hose, and discharges from 40 to 350 home (160 L/min to 1400 L/min)? A. Master stream B. Handline stream C. Low volume stream D. Straight stream

B. Handline stream

Which of the following BEST describes how understanding heat transfer can help firefighters? A. It can help estimate the size of a fire attack. B. It can help estimate the size of a fire before attack. C. It allows firefighters to look for rapid fire behaviors D. It teaches firefighters how to avoid rapid fire behaviors.

B. It can help estimate the size of a fire before attack.

Air flow is the movement of air toward burning fuel and: A. Movement of smoke in to the compartment. B. Movement of smoke out of the compartment. C. Pressure differentials inside the compartment. D. Pressure differentials outside the compartment.

B. Movement of smoke out of the compartment.

When conditions are appropriate, natural horizontal ventilation operations should work with existing atmospheric conditions, taking advantage of: A. Natural inlets B. Natural airflow C. Positive pressure D. Negative pressure

B. Natural airflow

Which of the following is typically the MOST convenient method used to carry a folded salvage cover for a two firefighter spread? A. On the back with open edges next to the neck. B. On the shoulder with open edges next to the neck. C. On the forearms with open edges next to the hands. D. On the shoulder with folded edges facing towards the hands.

B. On the shoulder with open edges next to the neck.

Guide to decision making in an organization. A. Procedure B. Policy C. Standard D. Code

B. Policy

Which of the following BEST describes the results of forcible entry, ventilation, and fire extinguishment operations during loss control? A. Primary damage B. Secondary damage C. Salvage operations D. Overhaul operations

B. Secondary damage

The type of nozzle control valve that seats a moveable cylinder against a shaped cone to turn off the flow of water is the: A. Ball valve B. Slide valve C. Standpipe valve D. Rotary control valve

B. Slide valve

Which of the following fire stream patterns has the ability to reach areas other streams might not reach? A. Fog stream B. Solid stream C. Broken stream D. Straight stream

B. Solid streams

Which of the following actions should firefighters do to determine the difference in feel of supported and unsupported areas of roof? A. Cut the roof B. Sound the roof C. Step on the roof D. Bounce an item off the roof

B. Sound the roof

Which of the following is the term used for two boards connected with long carriage bolts? A. Shutters B. Strongbacks C. Hopper windows D. Security bars and grilles

B. Strongbacks

SCBA should be worn even if the air after a fire incident appears to be without smoke to protect firefighters from: A. Overexertion B. Toxic combustion products C. Nontoxic airborne particles D. Extremely high levels of oxygen

B. Toxic combustion products

Which preconnected hose load is designed to be pulled by one person and must be completely removed from the bed before deploying the nozzle end? A. Minuteman load B. Triple layer load C. Combination load D. Preconnected flat load

B. Triple layer load

Which type of fire hose requires the most care in cleaning? A. Hard intake hose B. Woven jacket hose C. Hard rubber booster hose D. Rubber jacket collapsible hose

B. Woven jacket hose

When operating a handline, a firefighter should open the control valve slowly: A. to increase water hammer. B. to better control nozzle reaction. C. to minimize turbulence in the fire stream. D. to comply with manufacturers recommendation.

B. to better control nozzle reaction.

Standard three way fire hydrant requires a _______-inch (mm) valve opening. A.3 (75) B. 4 (100) C. 5 (125) D. 6 (150)

C. 5 (125)

Friction loss may be overcome by: A. Curving the hoseline. B. Decreasing hose size. C. Adding additional parallel hoseline. D. Inserting in line gauges in the layout.

C. Adding additionalparallel hoseline

What fire behavior is the result of an increase in low level ventilation prior to upper level ventilation? A. Rollover B. Flashover C. Backdraft D. Smoke explosion

C. Backdraft

A barbed wired fence should be cut with a: A. Axe B. Rotary saw C. Bolt cutter D. Cutting torch

C. Bolt cutter

What is the most common source of heat in combustion reactions? A. Radiant energy B. Electrical energy C. Chemical energy D. Mechanical Energy

C. Chemical energy

Which of the following are designed to be driven into walls or wooden framing to provide strong points to hang objects A. C-Hooks B. I-Hooks C. J-Hooks D. T-Hooks

C. J-Hooks

The energy required to change a liquid into a vapor is: A. Steam heat B. Specific heat C. Latent heat or vaporization D. British thermal unit (Joules)

C. Latent heat or vaporization

Roofs that may fail early in a fire and are extremely dangerous to work under are roofs supported by: A. Heavy weight slates or tiles. B. Lightweight composition shingles. C. Lightweight or engineered trusses. D. Heavy weight or mechanical trusses.

C. Lightweight engineered trusses

When performing forcible entry to open a door begins with: A. Sizing up windows in the structure. B. Breaking windows near a door to reach lock inside. C. Minimum damage and proceed to maximum damage. D. Maximum damage and proceed to minimum damage.

C. Minimum damage and proceed to maximum damage.

When deploying preconnected hoseline, which load should result in the hoseline deploying with fewer kinks and bends ? A. Flat load B. Triple layer load C. Minuteman load D. Combination load

C. Minuteman load

Which of the following common building materials performs well under fire conditions but can lose strength through spalling? A. Gypsum B. Lath and Plaster C. Reinforced concrete D Composite material

C. Reinforced concrete

What part of a traditional wood joisted roof tends to lose strength gradually when exposed to fire? A. Webbing B. Parallel chord C. Solid wood joust D. Metal gusset plate

C. Solid wood joist

Set of principles developed through consensus. A. Procedure B. Policy C. Standard D. Code

C. Standard

Which of the following is the most commonly used fire supperession method? A. Fuel removal B. Oxygen exclusion C. Temperature reduction D. Chemical flame inhibition

C. Temperature reduction

Which of the following items allow the number of hoslines operating on the fire ground to be increased or decreased? A. Valves B. Fittings C. Valve devices D. Intake strainers

C. Valve devices

Which of the following may have a key pad, card reader, or finger print activated screen? A. Mortise locks B. Multiple bolt locks C. Tubular dead bolt locks D. Electronic keyless or digital locks

D. Electronic keyless or digital locks

Which of the following statement is an advantage of the accordion Load? A. It is the easiest to load and is suitable for any size of supply hose. B. It leaves fewer sharp bends in the hose than horseshoe or flat load. C. Only three or four fire fighters are required to carry the hose from the bed to the fire scene. D. Firefighter can easly pick up a number of folds and place on one shoulder to carry hose from the bed.

D. Firefighter can easily pick up a number of folds and place on one shoulder to carry hose from the bed.

For vertical ventilation to be effective, a horizontal inlet opening at or below the level of fire is needed to provide a flow path for: A. Flames to exit the structure. B. For smoke to enter the structure. C. For fresh air to exit the structure. D. For fresh air to enter the structure.

D. For fresh air to enter the structure.

Mechanical ventilation methods using fans, blowers, and smoke ejectors can be applied to horizontal and vertical ventilation, but is most often used for: A. natural ventilation B. Vertical ventilation C. Hydraulic ventilation D. Horizontal ventilation

D. Horizontal ventilation

Which of the following statement about hoselines during overhaul operations is most accurate? A. Floor runners protect hoselines from damage by debris. B. 3 and 1/2 inch (90 mm) attack lines must be present during overhaul. C. All couplings should be positioned in the middle of the salvage site. D. Hoselines should be monitored for leakage, especially at couplings.

D. Hoselines should be monitored for leakage, especially at couplings.

What building component supports only it's own weight and may divide two areas within a structure? A. Flat roof B. Pitched roof C. Load bearing wall D. Non load bearing wall

D. Non load bearing wall

Which of the following is NOT actively part of the combustion reaction represented by the fire tetrahedron? A. Fuel B. Heat C. Oxygen D. Passive agents

D. Passive agents

Which of the following is MOST accurate about the care and maintenance of forcible entry tool? A. Keep tools freshly painted B. Test tool design and function before use C. Continue using damaged tools, avoiding damaged areas. D. Report damage to tools according to department procedures.

D. Report damage to tools according to department procedures.

Which of the following construction types offers the appearance of Type III construction? A. Type I B. Type II C. Type IV D. Type V

D. Type V

Noncombustible construction as defined by the National Building Code of Canada achieves fire safety by: A. Using fire resistant materials. B. Avoiding concealed spaces under floors and roofs. C. Placing limitations on size of wood structural methods. D. Using noncombustible materials for structural members and other building assemblies.

D. Using noncombustible materials for structural members and other building assemblies.

Which of the following statements about streams is MOST accurate? A. A broken stream has a smaller surface area. B. Water in a solid stream absorbs heat more rapidly. C. A solid stream has greater surface area to absorb heat. D. Water broken into small droplets absorbs heat more rapidly.

D. Water broken into small droplets absorbs heat more rapidly.

A physical change causes a change both chemically and in appearance.(True or False)

False

A trench cut is used to create a fire a fire break that increases the spread of fire in common attic structures or large structures. (True or False)?

False

Buildings are composed of the same materials, all of which can prevent or contribute to fire growth. (True or False)

False

Dry barrel hydrants are designed to have water inside them at all times. (True or False)

False

Fire hydrants locations are generally determined by the fire station. (True or False)?

False

Gates should be pried or cut when forcing entry to cause less damage. (True or False)

False

Heated gypsum may crack and shatter when struck by a cold fire stream.(True or False)

False

Hose size refers to the external diameter of the hose.(True or False)

False

In a forward lay, the first coupling to come off the hose bed should be male. (True or False)

False

Interior pocket doors can be forced with the same technique used for sliding doors. (True or False)?

False

Interior walls are more difficult to breach than exterior walls. (True or False)?

False

Large smoldering items should be left inside the fire incident structure for thorough extinguishment. (True or False)

False

Nozzles should be stored with the control valve bale in the open position. (True or False)

False

Overhaul procedures typically begin in the area of least severe fire involvement. (True or False)

False

Staff personal deliver emergency services directly to external customers. (True or False)

False

Synthetic salvage covers require as much maintenance an canvas covers. (True or False)

False

The best entry point into a burning building is to force entry through window. (True or False)?

False

The incipient stage is when the fire begins to influence the compartment environment. (True or False)

False

The primary way water extinguishes fire is by extinguishes fire is by excluding oxygen from fuel (smothering) (True or False)

False

The pumping mechanism for hydraulic prying tools can only be powered. (True or False)?

False

The triangle cut ventilation hole provides the least reliable information of conditions beneath the roof. (True or False)?

False

A hose clamp should be applied approximately 5 feet (1.5 m) from the coupling on the supply side. (True or False)

True

All energy can change from one type to another. (True or False)

True

Allowing carbon and ash stains to dry on canvas salvage covers may cause a canvas to rot. (True or False)

True

Cutting around a lock is another way to open a resisting door. (True or False)?

True

In ambient temperatures (about 68°F [20°C]), materials can ignite at oxygen concentrations as low as 14 percent. (True or False)

True

NFPA 1901 lists the minimum quantity of hose to be carried on a standard pumper or engine.(True or False)

True

No single forcible entry tool handle all situations. (True or False)?

True

Nontraditional type of locks provide a higher level of security. (True or False)?

True

Restoring the HVAC system to operation after a fire is the responsibility of the building engineer or maintenance superintendent. (True or False)?

True

Rotary control valves control both the water flow and discharge patterns of a fire stream.(True or False)

True

Security barriers block escape routes for both firefighters and occupants. (True or False)?

True

Size and moisture content affect how wood reacts to fire. (True or False)

True

Smoke control system usually have a system diagram in the same location as the control panel, indicating where the alarm originated. (True or False)?

True

Tactical ventilation should only be performed when a fire attack hoseline and teams are in place and ready to advance toward the fire. (true or false)?

True

The fire service uses an organizational structure based on rank. (True or False)

True

The only way to ensure fires are extinguished in baked items such as rags, cotton, or hay is to break them apart. (True or False)

True

The philosophy of loss control describes activities performed before, during, and after a fire incident to minimize losses to property. (True or False)

True

The two general types of tactical ventilation used for structure fires are horizontal and vertical. (True or False)?

True

To prevent water hammer, valves, nozzles, and hydrants should be closed slowly. (True or False)

True

Two or more primary feeders should run from the source of the water to high risk and industrial districts along separate routes. (True or False)?

True

When advancing hose up and down a stairway, the hose should be uncharged when conditions allow. (True or False)

True