BLOCK 4: CHEMICAL CONTROLS - Unit 17: Respirator Fit Testing (complete)

Question 1

NOTE

I made this set ahead of the class schedule; I now know we are PTing in the lab with one of these procedures (Bitrex sensitivity) later this week. These cards may not be testable.

Answer 1

Here’s a cat to make your day better :)

Question 2

A pass/fail test method that uses a person’s sense of taste, smell, or irritation to determine whether facepiece leakage occurs. It requires no complicated equipment and can be done easily even in field conditions.

Answer 2

QUALITATIVE FIT TESTING (QLFT)

There are different methods to accomplish this type of fit testing. This unit will
describe the Bitrex solution protocols.

Question 3

What are the items needed to perform a QLFT?

Answer 3

• Test hood
• Nebulizers
• Sensitivity Solution
• Fit Test Solution

Question 4

Needed to ensure the solution remains in the hood and around the subject’s breathing zone. This ensures the accuracy of the fit test.

Answer 4

FIT TEST HOOD

Question 5

Used to turn liquid test solution into an airborne mist. This airborne mist is introduced to the inside of the test hood to conduct the test.

Answer 5

NEBULIZER

Two nebulizers are used during QLFT. One is used for a sensitivity test and one is used for the fit test.

Question 6

When conducting a qualitative fit test, you must first determine if the individual being fit tested is able to ___________________________________.

Answer 6

Footnote

DETECT THE TESTING SOLUTION

Without the ability to detect the testing solution, the worker
would be unaware if the respirator seal was leaking during the test.

Question 7

A ______________________ uses a machine to measure the number of particles inside and outside the mask and does not rely on the respirator wearer to taste or smell in order to detect a poor seal.

Answer 7

QUANTITATIVE FIT TEST (QNFT)

Question 8

The degree to which the respirator fits the face of the wearer.

Answer 8

FIT FACTOR (FF)

Not to be confused with Assigned Protection Factor (APF) The FF is referring to performance as it is related to how the respirator fits the wearer, NOT the degree of protection it provides.
FF = APF x 10

Question 9

QNFT must be accomplished when specified by an OSHA substance specific standard or when fit testing a negative pressure air-purifying respirator that must achieve a Fit Factor (FF) greater than ________.

Answer 9

100

Question 10

The purpose of QNFT for gas mask fit testing is: (three-fold)

Answer 10

–ENHANCE CBRN DEFENSE TRAINING
–HELP MAXIMIZE MASK PROTECTION
–INSTILL CBRN MASK CONFIDENCE

Question 11

The ____________________ (shown here), is an ambient aerosol condensation nuclei counter QNFT system used to perform fit testing. The Plus system can be used on respirators and gas masks.

Answer 11

PORTACOUNT PRO

Question 12

Only __________ percent reagent grade isopropyl alcohol can be used in the wick assembly for the Portacount to operate as designed.

Answer 12

99.5%

Question 13

The ____________________ (shown here), is inserted in the Portacount and allows the system to count particulates.

Answer 13

WICK ASSEMBLY

Question 14

Two lengths of tube attach to the Portacount Pro. The shorter tube collects the ambient air and the longer tube attaches to the mask in order to draw air from inside the mask. The tubes together are referred to as the ____________________.

Answer 14

TWIN TUBE ASSEMBLY

Question 15

TRUE OR FALSE:

The BE office will typically maintain a supply of gas masks and respirators for individuals to be fit tested.

Answer 15

TRUE

However, shop personnel should be encouraged to bring their individual respirators with them for fit testing.

Question 16

The purpose of the _________________________ is to position the drinking tube sampling port away from the user’s mouth.

Answer 16

SAMPLE TUBE EXTENDER

Question 17

The __________________________ is placed on the end of the drinking tube outside the mask and then attached to the twin assembly tube.

Answer 17

GAS MASK FIT ADAPTER

Question 18

__________________________ are required for fit testing respirators with the PortaCount. They are placed between the filter and the respirator in order to let the PortaCount sample the air inside the mask while being worn. It is removed after the fit test has concluded.

Answer 18

FIT TEST FILTER ADAPTERS

Question 19

An ______________________________ is used to generate particles in the air so the Portacount gets a good count from the ambient air and can detect if the particulates make it into the mask. Other ways to generate particles are to light a candle or spray an aerosol.

Answer 19

AEROSOL PARTICLE GENERATOR