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FDNY Cycle 5&6 Exam Questions and Answers 2024/2025( A+ GRADED 100% VERIFIED).
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FDNY Cycle 5&6 Exam Questions and Answers 2024/2025( A+ GRADED 100% VERIFIED).
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FDNY Cycle 5&6Air Shaft [Ch 8] - ANS A space between buildings or between rooms within a building,
provided for the purpose of admitting air and light to rooms.
Auto Exposure [Ch 8] - ANS The extension of fire in or on the exterior of a building from fire
originating in the same building
Basement [Ch 8] - ANS A story partly underground but having at least one-half its height,
measured from finished floor to finished ceiling, above the curb level.
Safety concerns of gypsum roof systems [Ch 8] - ANS - extremely vulnerable to moisture
causing a deterioration of the system
- conducive to an early collapse under fire operations (Members shall not be committed to roof
operations when this type of roof construction is found)
- Interior firefighting operations shall be conducted from areas of safety due to the
weight of such decking materials. House streams should be operated well in advance of
members.
- The presence of a GR will be indicated by a white powdery residue during saw
operations. Upon this observation, members shall make immediate notification to the Incident
Commander and proceed to evacuate the roof.
- gypsum roof that had been penetrated by moisture will produce a "brownish, clay-type
substance," that will fill the shroud of the saw during cutting operations.
Laminated Wood "I" beams [ch 8] - ANS Consist of a top and bottom chord and web.
The chords are made of 2" x 3", 2"x 4", or two-¾" CDX or pressed plywood glued together.
The web is usually made of ½" plywood.
Contractors may have bore holes to route
electric, plumbing etc., compromising the strength of this beam. If not properly sealed,
Fire can extend from one bay to another.
Metal "C" Joists [ch 8] - ANS constructed of lightweight steel, approximately 1/16" thick, and
may have predrilled holes for plumbing and electric lines.
, Cross braces may prevent twisting.
Lightweight Wood Trusses [ch 8] - ANS Made of 2"x3"s or 2"x4"s, which are held together with
sheet metal gang nails or gusset plates.
The failure of one truss may initiate a domino effect on adjoining trusses.
When light weight wood trusses are used as joists, fire can spread horizontally unimpeded.
Tests have shown truss failure rates are as low as 1 minute, 20 seconds. Failure of one truss
can cause a structure to totally collapse.
Gang Nails [ch 8] - ANS penetrate only ¼" to ½"
When exposed to high heat, fire, or prolonged moisture, gang nails may pull away causing the
failure of that truss.
Open Web Steel Bar Joist [ch 8] - ANS No fire resistance rating, protection from fire
depends on the ceiling finish and finish
roofing.
Used to span long distances (up to 60 feet).
Unprotected open web steel joists are particularly vulnerable to elevated temperatures of a fire
and may collapse after only 5 or 10 minutes.
Roofs with this type of roof support system must not be cut.
Vertical ventilation should be limited to removal of skylights & scuttle covers if present.
Emphasis should be placed on any and all horizontal ventilation points.
Common roofings of open web steel bar joists [ch 8] - ANS o Most common decking is
corrugated steel, with the joists spaced from four to
six feet apart.
o Solid wood
o Cementitious roof plank (wood fibers chemically processed and pressure bonded with
portland cement)
o Precast concrete or gypsum plank
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