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EV 551 Hazardous Materials Assessment – Summer2020
Homework 1 – 40 points
Which of the following is not a part of the HAZWOPER process:
Recognition of hazards
Evaluation of hazards
Control of hazards
Information gathering
Safety from hazards
All are part of the process
Hazardous waste site workers must:
Receive 40-hour OSHA 1910.120 training plus 24 hours of field supervision if exposed over the PEL
Receive 40-hour training plus 8 hours field supervision if exposed below the PEL and when respirators are not required
8-hour annual refresher training
All of the above
First Responder Operations level training allows persons to:
Witness or discover a release
Perform defensive actions
Stop the release
A and B are true
All of the above
Recognition of hazards includes:
Identifying the materials involved in the release
Identifying the degree of hazards present
Provide the level of protection needed for site workers
A and B are correct
All of the above
The most important response activity at a hazardous waste work site is:
Evaluation of hazards
Control of hazards
Recognition of hazards
Safety precautions
Frequent hazard types found at response sites include:
Physical hazards
Biological hazards
Chemical hazards
Mechanical hazards
All of the above
The purpose of initial control activities is to:
Immediately assess clean up alternatives
Provide time to responders to address long-term hazards
Slowly size up response activities
Both A and B are correct
None of the above
Spill reporting is covered by which of these federal regulations:
Superfund
DOT
RCRA
Clean Water Act
A, B, and D are correct
The effects of toxic materials on the human body are determined by:
Routes of exposure
Dose
Duration and frequency of exposure
All of the above
What are the four major pathways that chemical substances can enter the body?
___________________________________________________
___________________________________________________
___________________________________________________
___________________________________________________
What is the primary route of exposure to hazardous waste site workers or incident
responders?
Ingestion
Dermal absorption
Inhalation
Both a and b are correct
Dermal absorption may occur with which form(s) of a chemical:
Solid
Liquid
Aerosol
Mist
All of the above
The dose-response curve illustrates:
The indirect relationship between dose and response
The direct relationship between dose and response
The average number of affected individuals
None of the above
For most chemicals, a low dose does that does not show an appreciable hazard to exposed individuals is called the:
LOAEL
NOAEL
IDLH
Sensitivity
If multiple chemicals are present in a work zone, the threshold level:
Is based on the most hazardous chemical present
Is based on the susceptibility of the exposed population
Can not be accurately determined
Is based on laboratory experiments
Potentiation effects is defined as:
The combined effects of two chemicals equals the effects of each acting alone
The combined effect of two chemicals has an effect greater than the sum of the two individual chemicals
One chemical is usually not toxic by itself, but it increases the toxicity of the second chemical
None of the above
A PEL is:
Permitted educational limits
Permissible exposure limits
Without regulatory authority
A toxicity rating based on the concentration needed to cause death in 50% of exposed persons
B and C are correct
The federal agency responsible for determining PEL values is:
ACGIH
NIOSH
OSHA
EPA
The OSHA PEL-C value defines a limit that:
May be exceeded for a 15-minute exposure time
Requires a one-hour interval with no exposure
May be used as a peak exposure limit over an 8-hour workday
May never be exceeded during the workday
Ionizing radiation consists of the following:
Alpha particles
Beta particles
Gamma rays
Microwaves
Only A, B, and C are correct
Gamma radiation can:
Pass through PPE
Easily penetrate the body and be scattered and absorbed
Travel long distances
All of the above
Only A and C are correct
The greatest allies an individual has available for protection against ionizing radiation
include:
Time
Distance
Shielding
All of the above
For a chemical to be flammable, it must:
Be in a concentration above the UFL
Have a proper fuel-to-air ratio for combustion
Be found at a concentration below the LFL
All of the above
A reactive hazard that undergoes reaction may cause:
An increase in pressure
An increase in heat production
An increase in chemical vapor production
All of the above
Only A and C are correct
Corrosive hazards are difficult to control because they:
Cause structural damage to skin and containers
Only act as irritants
Act as oxidizers
All of the above
Both A and C are correct
Irritants are solids, liquids or gases that:
Must have direct contact with tissues to cause an effect
Impair judgment processes in exposed individuals
Increases fluid levels within affected tissues
None of the above
The physical and chemical properties of a hazardous material determine:
Environmental movement
Environmental behavior
Degree of hazard
All of the above
Both B and C are correct
A material with a specific gravity greater than 1 will:
Float on water
Dissolve in water
Sink in water
Not enter groundwater
A material, such as chlorine, has a vapor density greater than 1. This material will:
Rise into the air
Rapidly disperse in ambient air
Settle in low points of the topography
Increase the pressure of the atmosphere
Physical hazards are of concern to response workers because they:
Encounter conditions that are out of their control
Increase the potential for accidents
Decrease the need for PPE
Both A and B are correct
All of the above
Personal protective equipment decreases accident potential by:
Increasing movement
Increasing visibility
Reducing heat stress
Both A and B are correct
None of the above
Excavation and trenching operations offer special problems to hazardous site
workers. Safety requirements for these operations include:
Shoring and sloping activities
Placement of tools within 2 feet of the edge for accountability and access
Covering materials to keep rain out
All of the above
Heat stress hazards result in an alteration in internal body temperature. Cooling
mechanisms include:
Blood flow changes
Perspiration
PPE
Both A and B are correct
None of the above
Noise hazards may cause injury by:
Interfering with communication
Increasing stress levels
Causing short-term, long-term or permanent hearing loss
All of the above
None of the above
Basic types of noise exposure that can be found at a hazardous work site include:
Impact noise
Intermittent noise
Continuous noise
Both A and B are correct
All of the above
If A ____ dBA level is exceeded, a Hearing Conservation Program must be
established.
80
85
90
140
No individual at a work or response site may be exposed to a sound level above ____
dBA without ear protection.
120
100
140
130
Individuals are exposed to various sound levels during the workday, therefore, a
combined exposure level must be calculated for site personnel. If the Total Exposure
value exceeds ____, the allowable daily noise level has been exceeded.
.1
1
10
None of the above
Biological hazards at a hazardous waste site do not include:
Viral contaminants
Fungal growths
Allergic reactions
Snake bites
None of the above
NIOSH determines exposure limit values for:
Inorganic contaminants only
10-hour workdays, 50-hour work weeks
10-hour workdays, 80-hour work weeks
IDLH environments
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