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Fire > Confined space > Flashcards

Confined space Flashcards

1
Q 
O2 limits
< \_\_\_\_ deficient
< \_\_\_\_  rescuer will pant
< \_\_\_\_  rescuer will get dizzy/headache
< \_\_\_\_ unconsciousness
< \_\_\_\_ death
A 
19.5
17
15
9
6
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2
Q

CO
Explosive range
SCBA required
IDLH

A 
12.5-74.2
50ppm
1500ppm
1000ppm death in 2-3 hrs
4000ppm death less than 1hr
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3
Q 
Hydrogen sulfide H2S
LEL
coughing, loss of sense of smell
loss of consciousness/death in 30-60 min
rapid LOC/death
A

4.3%
100ppm
500-700ppm
700-1000ppm

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4
Q

VOlatile organic compounds (VOC)

A

organic chem with high vapor pressure at room temp. include solvents, paint thinner, nail polish remover, vapors from gas, heat oil, kerosene

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5
Q

ductile behavior

A

ability of a material to stretch/bend without suddenly breaking

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6
Q

tension

A

is two forces being applied through an object at 180 * to each other, usually along the long axis
concrete/masonry have no reliable tension strength

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7
Q

shear force

A

two forces applied directly toward each other (offset) through and object
-square to parallelogram

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8
Q

steel starts to loose strength at ___ degrees

A

700

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9
Q

The expansion of steel at 1000 degrees is ___ inches per 100ft

A

10

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10
Q

wood tends to fail

A

slowly and nosily

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11
Q 
weight of 
steel
earth
wood
concrete
reinforced concrete
A 
490 lb/cu ft
100 lb/cu ft
40 ib/cu ft
145 lb/cu ft
150 lb/cu ft
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12
Q

lateral load is 1% of the building weight for every ___% it’s out of plum

A

1

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13
Q

crushing in wood will occur around ____ lb/sq in

A

500-700

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14
Q

nails to connect members

A

16d

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15
Q

nails for gusset plates

A

8d

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16
Q

T-spot shore

weight rating

A

temporary shore

1,000-4000lbs

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17
Q

double t shore
weight rating
8, 10, 12 ft

A

16,000
10,000
7,000

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18
Q

two post vertical shore rating
4x4: 8, 10, 12
6x6 12, 14, 16

A 
16,000
10,000
7,000
40,000
29,000
24,000
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19
Q

door/window shore
4x4
6x6

A

2,000

6,000

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20
Q

prefab window/door
4x4
6x6

A

2,000

6,000

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21
Q

laced post shore
4x4
6x6

A

32,000
80,000
2 two post vertical shores, laced together
inside shore is a safe haven

22
Q

sloped floor shore
angle of floors
4x4
6x6

A

15-45 degree
24,000
60,000
*may be less depending on slope

23
Q 
cribbing
max slope
4x4: 2x2, 3x3
6x6: 2x2, 3x3
max height
A 
15 degrees
24,000
54,000
60,000
135,000
4ft, 6ft
24
Q

raker shores
Angles
spaced
x bracing is placed

A

30-60
<8ft on center
at the ends and every 40ft

25
Q

solid sole raker
angle
4x4
6x6

A

45-60
4,000 per raker
5,600 per raker

26
Q

split sole raker
angle
4x4
6x6

A

can be used over rubble piles
45-60
4,000
5,600

27
Q

concrete is strong in ___ but weak in ____ and _____

A

compression

tension, shear

28
Q

Concrete walls
8 inches will have __ layer of rebar ___ apart
>8 inches

A

1, 8-16 vertical and horizontal

2 layers of rebar

29
Q

T/F rescue teams should not cut post-tensioned cables unless absolutely necessary

A

T

30
Q

Two methods to cut post-tensioned cables

A

remove concrete and casing then:

1: use a torch to slowly heat the cable to stretch out the then cut
2: use carbide saw to cut one strand of a time (of 7)

31
Q

inspection hole

A

hole drilled prior to cutting in order to assess hidden side and account for victim location and safety

32
Q

relief cuts

A

address tension and shear vs compression. Cut with saw in square, x, or triangle shape

33
Q

bevel cut

A

angled cut for lift-out ops. limits the slab from falling into the hole

34
Q

step cuts

A

used for lift out ops when slab is thicker than saw. cut trench and then cut again

35
Q

stitch drills

A

holes through concrete in a close stitch pattern. similar to relief cut

36
Q

center of gravity

A

point around which the object’s mass is evenly distributed

37
Q

simple MA system

A

all pulleys move at the same speed and direction

38
Q

compound MA system

A

one simple system pulls on another simple system and some of the travelling pulleys move at a different speed than the load

39
Q

complex MA system

A

pulleys move in the opposite direction of the load

40
Q

High pressure airbags
at max height ____
max working capacities are _____
lift capacity ____

A

reduced to 50%

added together

is that of the smaller bag

41
Q

3 use of airbags

A

to spread or push
to lift and stabilize
to prevent rolling

42
Q

load angle factors
60*
45*
30*

A

1.1
1.5
2

43
Q

shackles

A

removable links to connect wire/ripe/chain for lifting

44
Q

swivel hoist ring

A

attached to concrete with expansion anchor, through bolt

45
Q

8 steps for search and rescue ops

A 
1secure the area
2 survey and perform size up
3 shut off utilities
4 rescue surface victims
5 search voids and crevasses
6 call a time out to withdraw and perform a safety size up
7 tunnel and trench to buried victims
8 remove general derbis
46
Q

gold strut weight rating

A

120,000lbs

47
Q

grey strut ratings

A

40,000lbs

48
Q

gold raker lengths

A

6’ or 8’

49
Q

rules for paratech strut numbering

A

even #s struts with heigh range?

odds #s extensions?

50
Q

Struts are not designed to accept
more than ___extensions with a total combined
length of ____

A

two

36”

51
Q

high pressure air bags run at ___ psi

low pressure at ___ psi

A

118

14.8

52
Q

weight of dirt

A

dirt

Fire (9 decks)

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