PracticeVideosBlogFlashcardsEspañol
All Practice Exams

Free Practice Questions for OSHA Disaster Site Worker

Exam-style questions and explanations by OpenExamPrep.

✓ No registration✓ No credit card
100+ Questions
100% Free

Loading practice questions...

Same family resources

Explore More OSHA Training

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

OSHA 30

Practice QuestionsStudy GuideCheat SheetFlashcards3 blogs

OSHA 510 Occupational Safety and Health Standards for Construction

Practice QuestionsStudy GuideCheat SheetFlashcards2 blogs

OSHA 30-Hour Construction Safety

Practice QuestionsStudy Guide

OSHA 10-Hour Construction Safety

Practice QuestionsStudy Guide

OSHA 511 Occupational Safety and Health Standards for General Industry

Practice QuestionsStudy GuideCheat SheetFlashcards

OSHA 10-Hour General Industry

Practice QuestionsStudy Guide

More From This Family

Videos and articles for deeper review.

ArticleOSHA 510 vs. OSHA 511: Choose Construction or General Industry in 202612 min readArticleOSHA 510 Course Requirements 2026: Enroll, Complete, and Qualify for OSHA 50012 min readArticleBest Hard Hats for Construction Workers: ANSI Z89.1 Compliant Picks for 202612 min readArticleBest High-Visibility Safety Vests for Construction, CDL & OSHA 30 in 202612 min read
Exam Review

Key Facts: OSHA Disaster Site Worker Exam

7.5 hours

Minimum In-Person Instruction

OSHA OTP DSW Procedures (2024)

None

Student Prerequisites

OSHA OTP DSW Procedures (2024)

2 per respirator

Max Students in Respirator Test

OSHA OTP DSW Procedures (2024)

10:1

Recommended Student-Trainer Ratio (Respirator Test)

OSHA OTP DSW Procedures (2024)

APF 10

Half-Face APR Protection Factor

29 CFR 1910.134 Table 1

19.5%

Oxygen-Deficiency Threshold

29 CFR 1910.134

OSHA #5600

Required Trainer Course

OSHA Outreach Training Program

The OSHA 7.5-Hour Disaster Site Worker (DSW) Outreach course trains skilled support and cleanup workers - equipment operators, utility crews, demolition and debris-removal workers - to protect themselves at natural and man-made disaster sites. Under the 2024 OSHA procedures there are no student prerequisites, and the class must run in person for a minimum of 7.5 instructional hours; video-conference delivery is prohibited. Designated topics and typical times are: characteristics of a disaster (1.0 hr), hazard awareness - physical (1.0), health (0.5), and traumatic stress (0.5) - tool/equipment safety (1.0), risk assessment (0.5), Incident Command System (1.0), hierarchy of controls (0.5), PPE (1.0), and an exercise/workshop (0.5). Evaluation is hands-on: the trainer individually scores each student on inspecting, donning, user seal-checking, and doffing a half-face air-purifying respirator (two students per respirator, recommended 10:1 student-trainer ratio), and students complete a final exercise identifying hazards, PPE needs, hygiene/decontamination issues, and personal safety responsibilities. Graduates receive a DOL Disaster Site Worker card; the program is voluntary and emphasizes hazard identification and avoidance rather than OSHA standards.

Sample OSHA Disaster Site Worker Practice Questions

Try these sample questions to review concepts for the OSHA Disaster Site Worker exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1What most distinguishes a disaster site from a routine construction or demolition worksite?
A.Disaster sites are exempt from PPE requirements during the rescue phase
B.Hazards are largely unknown, uncontrolled, and can change rapidly as conditions evolve
C.Disaster sites contain only natural hazards such as floodwater and wind damage
D.Heavy equipment is never used at disaster sites
Explanation: Unlike a planned construction project, a disaster site has no pre-job survey or established controls; structures, debris, and atmospheres present unknown hazards that can change without warning, which is why the OSHA Disaster Site Worker course stresses continuous hazard awareness.
2Which of the following events is classified as a man-made disaster?
A.A hurricane storm surge flooding a coastal city
B.An earthquake collapsing a highway overpass
C.A structural collapse caused by a terrorist bombing
D.A tornado destroying a residential neighborhood
Explanation: Man-made disasters result from human action, such as terrorist attacks, industrial explosions, or major transportation accidents; the DSW curriculum applies equally to natural and man-made events except for the CBRNE-specific material.
3Which workers are considered 'skilled support personnel' at a disaster site?
A.Equipment operators, utility workers, and demolition crews who support response operations
B.Emergency physicians and trauma nurses treating victims
C.Public information officers handling media briefings
D.Volunteers sorting donated food and clothing
Explanation: Skilled support personnel are workers such as crane and heavy-equipment operators, utility crews, and demolition or debris-removal workers whose trade skills are needed to support disaster response - the primary audience of the OSHA Disaster Site Worker course.
4Under 29 CFR 1910.120(q)(4), a skilled support worker who is called to an emergency involving hazardous substances but who lacks HAZWOPER training must receive what before working?
A.A completed 40-hour HAZWOPER course before entering the site
B.A written waiver of liability replacing any training requirement
C.Nothing - HAZWOPER never applies to skilled support personnel
D.An initial briefing at the site covering PPE use, the chemical hazards involved, and the duties to be performed
Explanation: HAZWOPER at 29 CFR 1910.120(q)(4) allows skilled support personnel to work at an emergency without prior HAZWOPER training if they are given an initial briefing at the site that includes instruction in wearing PPE, the chemical hazards involved, and what duties are to be performed.
5During the rescue phase of a disaster response, operations primarily focus on which objective?
A.Restoring electrical and water utilities to the area
B.Locating and extricating live victims as quickly as conditions safely allow
C.Demolishing all damaged structures to clear the site
D.Documenting property damage for insurance claims
Explanation: The rescue phase concentrates on finding and freeing survivors; once the likelihood of finding live victims has passed, the operation transitions to recovery and then cleanup, where the pace and accepted risk level change.
6A heavy-equipment operator hears on the news that a building has collapsed nearby and wants to help. What is the proper way for the operator to join the response?
A.Wait to be requested through official channels and check in with incident command before performing any work
B.Drive to the site immediately and start moving debris where it looks worst
C.Enter the collapse area on foot to search for victims before equipment arrives
D.Begin work at the perimeter without checking in, since check-in slows the response
Explanation: Self-dispatching (freelancing) is prohibited; workers must be activated through official channels and check in with the incident command system so they are accounted for, briefed on hazards, and assigned where they are actually needed.
7Why does the Disaster Site Worker program emphasize that training must occur before a disaster strikes?
A.Because OSHA fines workers who arrive untrained
B.Because training is unavailable once a disaster has been declared
C.Because the chaotic conditions of an actual response leave little opportunity for effective safety training, so prepared workers protect themselves better
D.Because insurance companies require pre-incident certificates before paying claims
Explanation: Pre-incident training is a core theme of the course: once a disaster occurs, conditions are chaotic and time-pressured, so workers who already know the hazards, respirator skills, and decontamination practices are far better able to protect themselves and others.
8In a site control layout at a disaster involving contamination, in which zone does work that directly contacts the contamination take place?
A.The support (cold) zone
B.The contamination reduction (warm) zone
C.The staging area outside the perimeter
D.The exclusion (hot) zone
Explanation: The exclusion or hot zone is the area where contamination is present and where work involving direct contact with the hazard occurs; entry requires proper PPE and authorization through the incident command system.
9The urgency felt at a disaster site can pressure workers into taking shortcuts. Why must disaster site workers still put their own safety first?
A.An injured worker becomes an additional victim, diverting rescue resources away from the original emergency
B.Workers who are injured lose their OSHA outreach cards
C.Personal safety only matters after all victims are recovered
D.Taking risks is acceptable as long as a supervisor approves it verbally
Explanation: A core message of the course is that a worker who becomes injured or ill adds to the casualty count and pulls rescuers, medical care, and equipment away from the people the response is meant to help.
10In disaster response, the acronym CBRNE stands for which set of agents or hazards?
A.Collapse, Burns, Radiation, Noise, and Electricity
B.Chemical, Biological, Radiological, Nuclear, and Explosive
C.Construction, Building, Renovation, Natural, and Environmental
D.Caustic, Bloodborne, Respiratory, Noxious, and Ergonomic
Explanation: CBRNE refers to chemical, biological, radiological, nuclear, and explosive agents - the categories of weapons or releases associated with man-made (often terrorism-related) disasters covered in a dedicated lesson of the DSW curriculum.

About the OSHA Disaster Site Worker Exam

The OSHA 7.5-Hour Disaster Site Worker course is the awareness-level Outreach Training Program class for workers who provide skilled support - utility, demolition, debris removal, or heavy equipment operation - or cleanup services at natural and man-made disaster sites. The course covers how disaster sites differ from regular construction work, physical and health hazard awareness, traumatic incident stress, tool and equipment safety, risk assessment, the Incident Command System, the hierarchy of controls, and respiratory protection and other PPE. Every student must pass a trainer-scored performance test on inspecting, donning, seal-checking, and doffing a half-face air-purifying respirator, plus a final hazard-identification exercise. Training must be conducted in person by an OSHA-authorized trainer, and graduates receive a Department of Labor Disaster Site Worker course completion card.

Exam sponsor: OSHA-authorized Disaster Site Worker Outreach trainers (authorized via OSHA #5600) under the OSHA Outreach Training Program. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Question count not published by the exam provider

Time Limit

Minimum 7.5 instructional hours, delivered in person in one day

Passing Score

Successful completion of the scored respirator performance checklist and the final assessment exercise

Exam / Certification Fees

$200-$400 typical, set by the authorized trainer or provider

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

13%

Characteristics of a Disaster

How disaster sites differ from construction sites, natural vs man-made events, CBRNE agents, skilled support personnel, HAZWOPER 1910.120(q)(4) site briefings, rescue/recovery phases, site control zones, and the prohibition on self-dispatching

20%

Hazard Awareness: Physical & Health

Structural instability and secondary collapse warning signs, voids, downed lines and generator backfeed, floodwater, silica, asbestos, lead, mold, carbon monoxide, bloodborne pathogens, tetanus, heat stress, and noise

7%

Traumatic Incident Stress

Normal stress reactions to abnormal events, buddy-system monitoring, on-site coping (breaks, pacing, hydration, peer support), risk factors such as handling remains, and when to seek professional help

13%

Tool & Equipment Safety

Generator placement and transfer switches, chainsaw kickback and chaps, spring poles, GFCIs, heavy-equipment blind spots and swing radius, torch cutting in mixed debris, suspended loads, ladders, refueling, and the 10-foot power-line clearance

14%

Risk Assessment & Hierarchy of Controls

Hazard identification first, probability-times-severity risk evaluation, continuous reassessment as conditions change, stop-work decisions, and elimination, substitution, engineering, administrative, and PPE controls applied to disaster conditions

13%

Incident Command System

ICS as a NIMS component, unity of command, 3-7 span of control, check-in/checkout accountability, incident commander and safety officer authority, unified command, plain-language communication, and why freelancing is prohibited

20%

Respiratory Protection & PPE

APR limitations (no oxygen supply, no IDLH or sub-19.5% oxygen use), APF 10 half-face, inspection/donning/doffing, positive and negative user seal checks, N/R/P filter classes and P100, cartridge selection and breakthrough, fit testing, medical evaluation, gloves, boots, and decontamination hygiene

Preparing for the OSHA Disaster Site Worker Exam

What You Need to Know

  • Passing score: Successful completion of the scored respirator performance checklist and the final assessment exercise
  • Assessment: Question count not published by the exam provider
  • Time limit: Minimum 7.5 instructional hours, delivered in person in one day
  • Exam / certification fees: $200-$400 typical, set by the authorized trainer or provider Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

OSHA Disaster Site Worker: Suggested Study Strategy

1Drill the respirator sequence until automatic: inspect facepiece, straps, valves, and cartridges; don chin-first; tighten top then bottom straps; then do BOTH user seal checks - negative (cover inlets, inhale, facepiece collapses) and positive (cover exhalation valve, exhale gently, no leak)
2Memorize the hard numbers: 19.5% oxygen deficiency threshold, APF 10 for half-face APRs, 10-foot clearance from power lines up to 50 kV, 85 dBA hearing-protection rule of thumb, and 6 inches of moving floodwater knocking an adult down
3Know the NIOSH filter code: N/R/P = Not oil resistant, oil Resistant, oil Proof at 95/99/99.97% efficiency, with P100 color-coded magenta - and that no APR supplies oxygen or works in IDLH atmospheres
4Learn the hierarchy of controls in order (elimination, substitution, engineering, administrative, PPE) and be able to classify disaster-site examples like de-energizing lines, wetting dust, crew rotation, and respirators
5Master ICS basics tested in the final exercise: unity of command (one supervisor), span of control 3-7 (optimal 5), check-in/checkout accountability, plain language, the safety officer's stop-work authority, and the ban on freelancing
6Review the eight designated 7.5-hour topics from the 2024 OSHA procedures and time weights (hazard awareness 2.0 hrs total; disaster characteristics, tools, ICS, and PPE 1.0 hr each) so you know where the course concentrates

Frequently Asked Questions

Who should take the OSHA 7.5-Hour Disaster Site Worker course?

Workers who provide skilled support services - utility work, demolition, debris removal, heavy equipment operation - or site cleanup services in response to natural and man-made disasters. Most students come from the construction trades, but utility and public works employees also attend.

Are there prerequisites for the 7.5-hour Disaster Site Worker course?

No. The 2024 OSHA Outreach Training Program Disaster Site Worker Procedures state there are no student prerequisites for either the 7.5-hour or 15-hour course. Older provider pages claiming an OSHA 10-hour prerequisite reflect outdated procedures.

Can the Disaster Site Worker course be taken online?

No. OSHA requires the 7.5- and 15-hour DSW courses to be conducted in person, with no exceptions - training may not be delivered through any video-conferencing platform. The hands-on respirator performance test is a core reason for this rule.

How are students tested in the Disaster Site Worker course?

There is no published written exam. The trainer individually scores each student on inspecting, donning, performing a user seal check on, and doffing a half-face air-purifying respirator (only two students per respirator are allowed), and students complete a final exercise identifying site hazards, needed PPE, hygiene and decontamination issues, and personal safety responsibilities.

What card do graduates receive and does it expire?

Graduates receive a Department of Labor (DOL) Disaster Site Worker course completion card through the trainer's Authorizing Training Organization. The card has no federal expiration, but the Outreach program is voluntary and some employers or jurisdictions set their own refresher requirements.

What is the difference between the 7.5-hour and 15-hour DSW courses?

Both cover the same designated topic list, but the 15-hour version spends roughly double the time (for example, 2.5 hours on physical hazards and 3.5 hours on tool/equipment safety versus 1.0 hour each) and is intended for advanced operational response and hazardous cleanup concerns. Both require the scored respirator test and a final exercise.

Who can teach the Disaster Site Worker course?

Only OSHA-authorized DSW Outreach trainers: current Construction or General Industry Outreach trainers who complete the OSHA #5600 Disaster Site Worker Trainer Course plus either 40-hour HAZWOPER training (within five years, or an 8-hour refresher within 12 months) or journey-level building-trade credentials. Trainers renew with OSHA #5602 every four years.

Does the Disaster Site Worker card satisfy HAZWOPER requirements?

No. Outreach training is voluntary and does not meet the training requirements of any OSHA standard, including HAZWOPER (29 CFR 1910.120). Workers performing hazardous waste operations need separate compliance training; skilled support personnel called to an emergency receive an initial site briefing under 1910.120(q)(4).