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Hazardous Materials Training > Meters > Flashcards

Meters Flashcards

1
Q

What does the gas ranger detect?

A

Methane

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2
Q

What mode would you use to PINPOINT the source of a gas leak using the gas ranger?

A

-sniff/track gas

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3
Q

At what percentage does the gas ranger alarm?

A
  • at 10% LEL

- at 5% gas (50,000 PPM)

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4
Q

What will the gas ranger display indicate if the battery is low?

A

“Flashes low”

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5
Q

What 5 areas of the atmosphere does the multirae measure?

A

1) Combustibility (methane but can do many more)
2) O2
3) CO (Carbon Monoxide)
4) H2S (Hydrogen Sulfide)
5) VOC (Volatile Organic Compounds)

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6
Q

What are the alarm levels on the MultiRae?

A 
LEL = 10%
O2 = 19.5% & 23.5%
CO = 35 PPM
H2S = 10 PPM
VOC = 50 PPM-100
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7
Q

(MultiRae) How many PPM is 20% by volume?

A

200,000 PPM

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8
Q

What type of battery does the MultiRae Pro use?

A

Rechargeable Lithium Ion battery. Meter should be kept on the charger when not in use.

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9
Q

When air monitoring around electrical hazards (MultiRAE), what type of sampling wand is used?

A

Non-conductive wand

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10
Q

What contaminates may give you false readings, damage sensors or damage meter (MultiRAE)?

A

a. organic silicones
b Silicates
c. Lead containing compounds

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11
Q

What are VOC’s and what is the highest Ionization Potential (IP) that the meter can detect?

A
  • Volatile Organic Compounds; modern industrial chemicals such as fuels, coatings, solvents, refrigerants, etc. They have a tendency to evaporate easily under normal conditions making them volatile and they have high flash points.
  • 10.6eV
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12
Q

How does the MultiRae read VOC’s?

A

There are 3 different PID sensors that can be used. (1) measures 0.1-5000 PPM (2) measures 1-1000PPM (3) 10PPB - 2000PPM

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13
Q

What do you want to do prior to metering a hazardous area (MultiRae)?

A

a) block pump inlet to make certain pump is working. Press Reset
b) Bump test. If it fails bump test, then calibrate meter.
c) confirm measurement gas (conversion factor) is set appropriately.

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14
Q

What are “conversion factors”? (MultiRae)

A

Values that must be multiplied by the reading, in LEL or VOC’s, to get the true reading of a known chemical. The MultiRae meter has all conversion factors built into the meter. Once you change the “measurement gas” (conversion factor) in the meter, you will get accurate readings from the meter.

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15
Q

Describe the Multirae probe and how long does it take for the gas to reach the meter?

A

The MultiRae has a filter on the inlet tube of the meter itself. You do not need a wand to take measurements. However, if you need the reach or are doing remote monitoring through long hoses, wands and tubing are supplied with each meter. If using a wand or tubing, remember that it takes about 1 second per foot of tubing and wand for the gas to reach the meter.

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16
Q

How often should you bump test and calibrate the MultiRae meter?

A

Bump: Once a week and before every call.
Calibrate: every 90 days or if it fails a bump test.

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17
Q

What gas do we calibrate the Multirae with?

A
  • LEL, O2, CO and H2S = Multi-gas methane, oxygen, carbon monoxide, hydrogen sulfide.
  • VOC’s = Isobutylene
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18
Q

When using the MultiRae meter for combustible liquids with flash points above 100 degrees F (38C) what area of the meter should be watched?

A

a. VOC’s. High carbon molecule products (greater than 9) may give erroneous low readings in the LEL area.

19
Q

What do you need to know prior to using the toxi rae meter?

A

What gas we are dealing with. It is a gas specific meter.

20
Q

What 3 gas sensors are supplied for toxirae?

A
  • ammonia (NH3)
  • Chlorine (C12)
  • Cyanide (HCN)
21
Q

What powers the toxie-rae?

A

lithium ion rechargeable battery; should be kept on charger

22
Q

What type of meter is the toxie-rae?

A

passive: the meter does not have a pump to pull the gas through the meter therefore you cannot connect a hose or wand

23
Q

How can you find measurement ranges for each toxi-rae sensor?

A

the meter will tell you the measurement ranges for each sensor during the meter warm up cycle.

24
Q

What are the 5 detection channels for the AP4C Chemical warfare detector?

A
  • Phosphorus (P)
  • Hydrogen Nitrogen Oxygen (HNO)
  • CH (CxHy bonds)
  • Arsenic (As)
  • Sulfur (S)
25
Q

What is the response time for the AP4C?

A

2 second average (up to 30 seconds at low concentration)

26
Q

What type of battery does the Ap4C use?

A

Lithium Ion Non rechargeable battery (no D Cell)

27
Q

What is the technology of the Ap4c?

A

Flame spectometry

28
Q

the eberline has a range of

A

90 ft with a 75 degree cone

29
Q

eberline

to measure for alpha radiation, attach the

A

pancake probe. the meter will automatically change from REM to CPM (counts per minute)

30
Q

eberline

what do you always do prior to entry?

A

obtain background reading and report to haz sector

31
Q

eberline

contamination is considered…

A

twice background

32
Q

eberline

hot zone is established …

A

at 2 mr/hr

33
Q

What other rad instruments do we carry besides eberline?

A
  • Identifinder
  • Rad eye
  • Eberline
  • Pendosimeter
34
Q

R =

A

1 million microrem (uR)
or
1000 millirem (mR)

35
Q

1000 uR =

A

1 millirem (mR)

36
Q

What does the jerome meter test?

A

mercury vapors in the low Ug/m3 or mg/m3

37
Q

Jerome meter

the measurement of when an area or person is considered contaminated?

A

0.03 mg/m3

38
Q

jerome meter

When will the meter give you a ‘High concentration” readout?

A

sample values above 999 Ug/m3

39
Q

jerome meter

in sample mode how long will the meter run before it will provide a reading?

A

16 seconds

40
Q

jerome meter

in survey mode how long will the meter run before providing a reading?

A

continuously run and provide a reading every 2 seconds

41
Q

the jerome meter detects _____ only

A

vapors

42
Q

is the jerome meter intrinsically safe?

A

no

43
Q

jerome
1 Ug/m3 =
1000Ug/m3 =

A
  • 0.001 mg/m3

- 1 mg/m3

44
Q

what does the identifinder detect?

A

gamma and neutron radiation

Hazardous Materials Training (3 decks)

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