MDs Flashcards
NLTs built before 1929 incorrect?
A. Steel I-beams
B. Steel columns
C. Dividing walls up to the underside of the roof boards
D. Dividing walls creating floor areas of 2500 square feet or less
C — (MDs—Pg 3) as high as the ceiling of the top floor
These changes were designed to effectively reduce the size of the cockloft and limit fire spread.
Acronym: CUT
C - ceiling - before 1930
U - underside roof boards - 1930-1940
T - top roof boards - after 1940
Apt houses built after 1929 req’d firewalls to (correct)?
A. Underside of the roof boards from 1930-1940
B. Top of the roof boards after 1940
C. Enclose floor areas and the cockloft to 3000 square feet or less
ABC — all correct (MDs Pg 4)
OLT which HL may be stretched to Exp 2 or Exp 4?
A. 2nd line only if fire has actually extended across a shaft into the exposure
B. 3rd HL if fire has extended or is about to extend across a shaft into the exposure
C. 2nd or 3rd HL only if fire has actually extended across a shaft into the exposure
D. 2nd or 3rd HL if fire has extended or about to extend across a shaft into the exposure
D— (MDs 3.2.11)
BC arrives fire in a 6-story OLT w/fire on the 3rd flr has extended to the 4th flr of the same bldg via a rear shaft. In this situation:
A. Special call an extra engine and ladder
B. Transmit a second alarm
A— (MDs 3.4.6)
Fire in shaft into an exposure (different building)—is a second alarm
Piping containing flammable gas is not permitted vertically or horizontally?
A. In stair enclosures
B. In a shaft with a standpipe riser
C. In public hallways
A B C —(MDs 3.5.9)
Store fire OLT incorrect?
A. 2 ½” line must be stretched for medium or large fires
B. No plate glass windows are to be broken without a charged line ready
C. Store ceilings are usually constructed of metal panels
D. Metal ceilings can communicate heat to the second floor
A— (MDs 4.3.1, 4.3.2, 4.3.3) Large fires only
Regarding SRO’s in OLT incorrect
A. Require sprinklers in each room and in the stairway
B. Sprinkler system cannot be supplied by FD
C. Sprinkler system is supplied only by a roof tank
D. They require an interior alarm system
C - (MDs 4.8.4) Sprinkler system has NO Roof tank. It’s supplied from the water main in the street. Cannot be supplied by FD
IC notified of a party wall balcony in the rear of an OLT should consider which of the following tactic(s)?
A. Special call Add’l Ladder to aid search and rescue on the rear party wall balcony
B. Stretch a hand line to the rear
C. Have portable ladders brought to the rear
A B C - (MDs 4.8.7D)
Steel used in NLTs incorrect:
A. Steel when heated, expands and can elongate substantially at fires
B. Steel when heated to high temperatures may fail
C. I-shape columns and I-beams can transmit fire, heat and smoke
D. Columns are also known as channel rails
C — (MDs 5.2.3) “H”-shape columns,
“I”-shaped beams
Channel Rails incorrect:
A. They are vertical columns found from the foundation to the cockloft
B. Main concern is that they are not fire-stopped
C. Located in voids about two feet square
D. Some vertical voids may contain channel rails along with the waste and water pipes
C. About 1 foot square (MDs 5.2.6A)
4-story NFP MD heavy fire on 1st fl extending to 2nd flr requiring a 2nd alarm. Who supervises units on 4th flr? A. The IC B. The Fire Sector Supervisor C. The Floors Above Sector Supervisor D. The Top Floor Sector Supervisor
C—(MDs 5.2.8) Normally—the Floors Above Sector Supervisor—for a lower floor fire
Top flr fire extends into H-Type cockloft and requires the IC to assign a Roof Sector Supervisor?
A. Early in operation. May initially be a Company Off
B. Early in the operation. Shall initially be a Chief Officer
C. Whenever the 2nd Chief Officer arrives
D. Whenever the 3rd Chief Officer arrives
A (MDs 5.9.1)
Trenches have all of the following except?
A. At least 3 feet wide
B. 2/more inspection holes may be cut on the fire side
C. Not opened until there is an adequate vent opening directly over the fire
D. Pulled when the fire passes the inspection holes
D (MDs 5.9.9 B, C) Pulled when fire reaches the inspection holes
Trenches Incorrect:
A. 20 feet from the initial vent hole
B. At the narrowest available roof section
C. Taking advantage of outside walls and interior fire walls
D. With a charged line brought to the roof
C—(MDs 5.9.9 E, H) Taking advantage of outside walls. Do not use interior fire walls
Most probable point for vertical fire extension in an H-type is? A. Vertical steel channels B. Closets C. Waste pipe voids D. Dumbwaiter shafts
A
Correct for subdividing firewalls:
A. Fire escape in the throat that spans the firewall indicates one apartment in the throat
B. Apts in throat may span a firewall and have 2 interior stairs as exits with no fire escape
C. Fire partitions in the throat always extend from the front to the rear wall
D. Subdividing walls are usually continued above the roof line
B—(MDs 5.11.3-5.11.6)
A-2 apartments in the throat,
C—usually extend from the front to the rear wall,
D—usually not continued above the roof line
Fire Wall: extends continuously from the foundation to, or through, the roof with sufficient structural stability to withstand the collapse of construction on either side of it. Fire wall ratings for 1968 BC rated _ hours; and rated _ hours 2008 BC
1968: 4 hours
2008: 2 or 3 hours
Scissor Stair exit doors are placed no less than _’ apart in the public hallway
No less than 15’