21) In the hierarchy of structural components, which of the following would be considered the most important?
A) Columns.
B) Girders.
C) Beams and joists.
D) Bearing walls.

22) When considering safety precautions during collapse operations, what would you consider to be the first priority?
A) Monitor the atmosphere for flammable or toxic gases, as well as sufficient oxygen.
B) Prohibit smoking.
C) Shut down all utilities.
D) Control the spread of fire, if present. If there is no presence of fire, prepare for it.

23) Cast iron has great __ strength but almost no __ strength.
A) Tensile; compressive.
B) Compressive; shear.
C) Shear; tensile.
D) Shear; compressive.

24) Which of the following metals has been used for structural support in construction, and is also known to be brittle?
A) Steel.
B) Lead.
C) Copper.
D) Cast Iron.

25) What apparatus should be in close proximity to the collapsed building, but not directly in front of it?
A) Ambulances.
B) Aerial ladders.
C) Heavy rescue apparatus.
D) Relay pumpers.

26) Which of the following would be considered the most common cause for structural collapse on the fire ground?
A) Structural weakness due to faults in design, shoddy workmanship, and illegal or improper renovations.
B) The heating of unprotected steel.
C) Fire damage to wooden structural members.
D) Explosions of fuels or explosives from backdraft.

27) When considering street management at collapses, why should pumpers be placed outside the fire block?
A) The truck itself is not often needed.
B) The pumper stands a better chance of maintaining its water supply if it isn't on the block where the collapse occurred. The pumper is carrying thousands of feet of hose. Use it.
C) The front of the building must be kept clear for needed aerial platforms, heavy-rescue trucks, and later, heavy equipment.
D) All the above.

28) The best means of locating victims of building collapse is to -
A) Starting at the perimeter of the building and move inward.
B) Starting from the interior of the building and moving outward.
C) Concentrate on the area where the victim was last seen or assigned.
D) All the above.

29) When can structural collapse occur?
A) During the initial fire attack.
B) After knockdown.
C) During overhaul.
D) All the above.

30) What does the victim tracking coordinator do at a building collapse?
A) To keep track of all persons who leave or are removed from the debris.
B) To keep track of the injuries of all persons who leave or are removed from the debris.
C) To note if any persons removed from the collapse were transported.
D) All the above.

31) Place in order the following five stages of the collapse rescue plan. (A) Searching voids. (B) Removal of the general debris. (C) Reconnaissance and size-up. (D) Accounting and removal of the surface victims. (E) Removal of selected debris and tunneling.
A) A, B, C, D, and E.
B) C, A, D, E, and B.
C) D, C, A, E, and B.
D) C, D, A, E, and B.

32) Why is selected debris removal during a building collapse even more dangerous than void area searches?
A) The statement is not correct. Searches of void areas pose more risk to both the victim and the rescuing firefighters than does select debris removal.
B) Because in debris removal, you may be removing an item that is supporting a load, possibly causing a secondary collapse.
C) You may be exposing pockets of unburned flammable vapors that have been contained from the collapse.
D) You may be wasting valuable time with selected debris removal when other, more effective measures can be taken.

33) Buildings that show the greatest resistance to collapse are those of Class __ construction.
A) Class I - Fireproof construction.
B) Class II - Noncombustible construction.
C) Class IV - Heavy Timber
D) Class V - Wood-frame construction.

34) How many generally recognized types of collapses are there?
A) 3.
B) 4.
C) 5.
D) 6.

35) In addition to the increase in weight, what is another hazard associated with stored rolls of paper, baled rags or bailed cotton?
A) They can shrink, causing a collapse of the storage piles.
B) They can harbor small undetectable smoldering fires.
C) The water damage can lead them to ferment and spontaneously combust.
D) When they absorb water, they can swell up, therefore pushing out walls and knocking columns out of plumb.

36) You are the safety officer of a large mill building fire. Part of your duties is to establish a collapse zone. Which of the following best describes the collapse zone you should establish?
A) An area that encompasses half the height of the building and the full length of the building.
B) An area that encompasses twice the height of the building and the full length of the building.
C) An area that encompasses 1 1/2 the height of the building and the full length of the building.
D) An area that encompasses the height of the building and the length of the building involved in a fire.

37) In which phase of the collapse plan is intelligence gathering conducted?
A) Size-up.
B) Reconnaissance.
C) Hazard identification.
D) Mitigation.

38) Which of the following terms best describes structures that are built so that most of the weight rests on bearing walls?
A) Unframed structures.
B) Framed structures.
C) Jack slab structures.
D) Skeletal structures.

39) This type of collapse is so named because the floors of the structure fall in layers. Location of victims is simplified in this type of collapse since floors maintain their physical aspects. Which of the following best describes this situation?
A) Lean-to collapse.
B) V-shaped collapse.
C) Pancake collapse.
D) Individual collapse.

40) Which of the following tools should be used in the surveillance and monitoring of a suspected area of building movement?
A) Binoculars.
B) Surveyor's transit.
C) Telescope.
D) Seismograph.

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