Block 4

Question 1

Engineering Controls

Answer 1

Include eliminating chemical, ventilation (dilution and LEV), automation, isolating, and enclosing the process, and design changes (tools, workstations, and equipment)

Question 2

Administrative Controls

Answer 2

Involve management and employee interventions designed to reduce exposure such as job rotation, job changes, education and training, personal hygiene, preventive maintenance, and housekeeping

Question 3

Personal Protective Equipment (PPE)

Answer 3

Should always be used as a last resort unless all other controls are not feasible

Question 4

Minimization

Answer 4

Expression used when a hazard is lessened by scaling down the hazardous process.

Question 5

Isolation

Answer 5

Term applied when a barrier is interposed between a material, equipment, or process hazard and the property or persons who might be affected by the hazard (e.g., glove box, blast shield).

Question 6

Substitution

Answer 6

refers to the Replacement of a hazardous material or activity with one that is less hazardous

Question 7

Ventilation

Answer 7

Used to control toxic and/or flammable atmospheres by exhausting or supplying air to either remove hazardous atmospheres at their source or dilute them to a safe level.

Question 8

Substance Specific Standards

Answer 8

OSHA created specific actions that must be taken when workers are exposed to potentially hazardous levels of the chemical of concern.

Question 9

Where can you find Substance Specific Standards?

Answer 9

OSHA 1910 Series and OSHA 1926 Series

Question 10

What can protective clothing be made out of?

Answer 10

Natural materials (e.g., cotton, wool, leather), man-made fibers (e.g., nylon, rayon), or various polymers

Question 11

Thermal

Answer 11

Heavy cotton or other natural fabrics

Question 12

Fire

Answer 12

Aluminized gloves; fire retardant; aramid fiber and other special fabrics

Question 13

Mechanical Abrasion

Answer 13

Heavy fabrics; Leather with metal studding

Question 14

Cuts

Answer 14

Metal mesh; aromatic polyamide fiber and other special fabrics

Question 15

Punctures

Answer 15

Leather; fabric coated with filled plastic; thick elastometers

Question 16

Vibration

Answer 16

Natural or polymeric gloves with elastomeric materials

Question 17

Chemical/Toxicological

Answer 17

Polymeric materials; Elastomeric materials

Question 18

Biological

Answer 18

Latex or polymer

Question 19

Radiological

Answer 19

Polymer gloves; lead lined resistant for radionuclides or shield containing

Question 20

Airflow Volume

Answer 20

Specific Quantity of air being pulled into and through the ventilation system

Question 21

Capture Velocity

Answer 21

Air Velocity at any point in front of a capture hood opening necessary to overcome opposing air currents and capture contaminated air prior to entering the workers breathing zone

Question 22

Face Velocity

Answer 22

Measurement of air at the opening of a local exhaust capture hood

Question 23

Three Components of Airflow

Answer 23

Area, Velocity, Airflow Volume

Question 24

Three Types of Pressure Losses

Answer 24

Friction Loss, Dynamic Loss, Vena Contracta

Question 25

Friction Loss

Answer 25

Due to rubbing of air molecules along the sides of the duct

Question 26

Dynamic Losses

Answer 26

Losses due to turbulence

Question 27

Vena Contracta

Answer 27

Point where airstream diameter is the smallest

Question 28

Smoke Tubes

Answer 28

Determine airflow in or out of a room

Question 29

Magnehelic Gauge

Answer 29

Determine what pressure the system is under

Question 30

Balometer

Answer 30

Uses hood attachment to funnel airflow and then calculate airflow volume automatically

Question 31

LEV System

Answer 31

Designed to capture and remove process emissions prior to their escape into the workplace environment.

Question 32

Manufacturers Guide

Answer 32

Should publish the minimum parameters that the ventilation system must meet before the system is deemed operational

Question 33

ACGIH

Answer 33

Key parameters that a ventilation system must meet before it is put into place

Question 34

Pre-Survey Form

Answer 34

If a ventilation system has already been evaluated, then there is a high probability that a BE technician has already researched the ventilation system key parameters in the IVM or the manufacturer’s literature and annotated those parameters on a pre-survey form.

Question 35

Vapor Calculations

Answer 35

Can be an indicator of what might be happening in the environment

Question 36

Air Sampling

Answer 36

Provide raw data on how much contaminant is being generated

Question 37

Standards

Answer 37

Sometimes specific contaminants can cause more harm to the body in comparison to other chemicals. These chemicals will have special regulations OSHA substance

Question 38

Face Velocity

Answer 38

Survey measures the velocity at the face of the hood

Question 39

Termoanemometer

Answer 39

This type of instrument employs the principle that the amount of heat removed by an airstream passing a heated object is related to the velocity of the airstream

Question 40

Inclined Manometer

Answer 40

Uses a Pitot tube allowing the user to record pressure inside the duct of the ventilation system; filled with red gauge oil, with a specific gravity of 0.826

Question 41

Pitot Traverse

Answer 41

Used to perform duct velocity or transport velocity surveys as well as static pressure checks.

Question 42

Operations and Maintenance Procedures for Ventilation Systems

Answer 42

Well-Maintained Filter System, Regular Maintenance, Good Housekeeping, Air Intakes in non-contaminated locations, Components dry

Question 43

Cleaning/Sanitizing Respirators

Answer 43

respirators must be Cleaned and disinfected IAW 29 CFR 1910.134 App. B-2 and AFI 48-137 regularly.

Question 44

Facepiece

Answer 44

> Rips, tears, cracks, and/or holes > Deformation of the natural shape > Cracked, scratched, or loose-fitting lenses > Broken or missing mounting clips

Question 45

Head Straps/Harness

Answer 45

> Loss of elasticity > Broken buckles or attachments > Breaks or tears

Question 46

Exhalation/Inhalation Valves

Answer 46

``` > Detergent residue or dust on valve seal > Proper installation > Rips, tears, cracks, and/or holes > Missing/defective valve cover > Pliability ```

Question 47

Air-purifying Element

Answer 47

> Proper type of filter for the contaminant(s) > Missing or worn gaskets > Worn threads > Cracks or dents in the housing

Question 48

Workplace Specific Operating Instructions

Answer 48

Supervisors of workplaces in which respiratory protection is used must develop a written plan as required by 29 CFR 1910.134