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NHFD SOG's > IMPORTANT NUMBERS > Flashcards

IMPORTANT NUMBERS Flashcards

1
Q

HCN Air/Odor Threshold

A

0.58 ppms

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2
Q

How many more times dangerous is HCN than CO?

A

24 times

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3
Q

When can SCBA use be discontinued during HCN monitoring?

A

when readings are under 5 (4.7) ppm

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4
Q

What is the STEL for HCN

A

15 minutes

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5
Q

What is the IDLH for HCN

A

50 ppm

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6
Q

What is the half life of HCN?

A

1 hour

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7
Q

What are some lethal doses of HCN?

A

270 PPM after 6-8 minutes
181 PPM after 10 minutes
135 PPM after 30 minutes

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8
Q

What is the ignition temperature of CO?

A

1128 degrees F

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9
Q

What is the flammable range of CO?

A

12.5%-74%

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10
Q

CO vapor density?

A

.968

rises because its lighter than air

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11
Q

What is a CO incident?

A

9ppm or less

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12
Q

What is a CO emergency

A

greater than 9PPM

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13
Q

How much greater of an affinity does CO have for hemoglobin compared to O2

A

210 times more

over 200ppm of o2 are required to replace 1 part of CO

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14
Q

Signal 1
Signal 2
Signal 3

A

1 Bomb Threat
2 Biological Threat
3 Chemical Threat

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15
Q

Mercury UN number

A

Hg UN 2809

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16
Q

What is the molecular weight of mercury?

A

MW 200.59

17
Q

What is the PEL of mercury?

A

0.05% mg/cubic meter of air (m3)

18
Q

What is the US DOT ERG for mercury

A

guide 172

19
Q

What temperature does mercury vaporize from liquid to gas

A

59 degrees F

20
Q

What is the flammable range for natural gas?

A

4%-15%

lighter than air

21
Q

What type of meter must be used for natural gas

A

Combustible gas indicator

22
Q

How far must non-emergency personnel be kept from a radiological scene

A

at least 500 ft

23
Q

What scenario can entry be made into a radiological scene when the meter reads >100mr/hr?

A

only when it is necessary to treat injured persons or prevent spread of contamination

24
Q

What is the distance of the controlled area for emergency personnel in radiological scenes?

A

100 ft from the scene, upwind if possible

25
Q

What must a meter read in an uncontrolled area during radiological emergency?

A

<2mr/hr

26
Q

What is considered to be radiological contamination based on readings from a Geiger or Ludlum type instrument with a pancake detector?

A

100cpm background or greater

NHFD SOG's (26 decks)

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