Study Guide 3

Question 1

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

Answer 1

The period between beginning measurement and obtaining a reading

Question 2

Detector tubes are used to:

Answer 2

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

Question 3

Alpha & beta radiation survey meters usually display readings in:

Answer 3

Counts per minute

Question 4

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

Answer 4

The lower explosive limit

Question 5

The most common calibration gases for combustible gas indicators are:

Answer 5

Methane, pentane

Question 6

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

Answer 6

Direct read-out instruments provide measurements in real time

Question 7

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

Answer 7

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

Question 8

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

Answer 8

The instrument’s reading compared to the calibration gas

Question 9

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?

Answer 9

1%

Question 10

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

Answer 10

23.5%

Question 11

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

Answer 11

NFPA 1991

Question 12

Chemical protective clothing is specifically designed to:

Answer 12

Prevent or limit skin exposure

Question 13

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

Answer 13

Permeation

Question 14

Which type of respirator should be worn in emergency response?

Answer 14

Positive pressure self contained breathing apparatus

Question 15

Which of the following organizations assigns protection factors to respirators?

Answer 15

NIOSH

Question 16

The longest approved air line for supplied air respirators is:

Answer 16

300 feet

Question 17

Support function garments should never be used for:

Answer 17

Emergency response

Question 18

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

Answer 18

NFPA 1992

Question 19

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

Answer 19

Permeate protective clothing

Question 20

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

Answer 20

Permeation

Question 21

When must a decontamination area be set up?

Answer 21

Before personnel enter the Hot Zone

Question 22

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

Answer 22

Prevent severe injury.

Question 23

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

Answer 23

Large amounts of water

Question 24

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

Answer 24

Liquid soap and water

Question 25

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

Answer 25

The chemical is highly concentrated