Study Guide 3 Flashcards

1
Q

Which of the following is the best definition of response time as it applies to detection devices?

A

The period between beginning measurement and obtaining a reading

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2
Q

Detector tubes are used to:

A

Measure the concentration of know gases, vapors, and unknown hydrocarbons

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3
Q

Alpha & beta radiation survey meters usually display readings in:

A

Counts per minute

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4
Q

On a combustible gas indicator with a reading in % LEL, the reading indicates 0-100% of:

A

The lower explosive limit

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5
Q

The most common calibration gases for combustible gas indicators are:

A

Methane, pentane

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6
Q

Which of the following is true of direct read-out instruments?

A

Direct read-out instruments provide measurements in real time

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7
Q

Which of the following instruments should you use in a flammable atmosphere?

A

Instruments marked “intrinsically safe” or “UL or FM”

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8
Q

Which of the following is the best definition of relative response as it applies to detection devices?

A

The instrument’s reading compared to the calibration gas

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9
Q

If you are monitoring a gas with an LEL of 2% and your combustible gas indicator reads 50% LEL, what is the
actual percentage of gas in the atmosphere?

A

1%

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10
Q

An atmosphere is assumed to be oxygen-enriched if concentrations of oxygen are greater than:

A

23.5%

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11
Q

Vapor-protective clothing for hazardous chemical emergency response is described in:

A

NFPA 1991

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12
Q

Chemical protective clothing is specifically designed to:

A

Prevent or limit skin exposure

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13
Q

The process by which a chemical moves through a material by molecular means is called:

A

Permeation

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14
Q

Which type of respirator should be worn in emergency response?

A

Positive pressure self contained breathing apparatus

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15
Q

Which of the following organizations assigns protection factors to respirators?

A

NIOSH

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16
Q

The longest approved air line for supplied air respirators is:

A

300 feet

17
Q

Support function garments should never be used for:

A

Emergency response

18
Q

Liquid splash-protective clothing for hazardous chemical emergency response is described in:

A

NFPA 1992

19
Q

Break though time refers to the time it takes for a chemical to:

A

Permeate protective clothing

20
Q

Which type of resistance data is most valuable when using vapor-protective clothing?

A

Permeation

21
Q

When must a decontamination area be set up?

A

Before personnel enter the Hot Zone

22
Q

In emergency decontamination, which of the following is a primary concern?

A

Prevent severe injury.

23
Q

If contaminants are corrosive, skin and mucous membranes must be flushed with:

A

Large amounts of water

24
Q

Non-soluble contaminants should be removed from the skin with:

A

Liquid soap and water

25
Q

Although other factors are involved, protective clothing is more likely to be permeated if:

A

The chemical is highly concentrated