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Exam Review

Key Facts: OSHA 15-Hr Disaster Site Worker Exam

15 hours

Minimum In-Person Instruction

OSHA OTP DSW Procedures (2024)

None

Student Prerequisites

OSHA OTP DSW Procedures (2024)

3.5 hours

Tool/Equipment Safety - Largest Topic Block

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

OSHA #5600

Required Trainer Course

OSHA Outreach Training Program

The OSHA 15-Hour Disaster Site Worker (DSW) Outreach course trains skilled support and cleanup workers - equipment operators, utility crews, demolition and debris-removal workers - for advanced operational response and hazardous cleanup 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 15 instructional hours; video-conference delivery is prohibited. Designated topics and typical times are: characteristics of a disaster (1.25 hr), hazard awareness - physical (2.5), health (2.0), traumatic stress (0.5) - tool/equipment safety (3.5), risk assessment (1.25), incident command (0.75), hierarchy of controls (1.25), PPE (1.25), and an exercise/workshop (0.75). 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 the course concludes with a final assessment exercise measuring mastery of all objectives. Graduates receive a DOL card; the program is voluntary and emphasizes hazard identification and avoidance rather than OSHA standards.

Sample OSHA 15-Hr Disaster Site Worker Practice Questions

Try these sample questions to review concepts for the OSHA 15-Hr Disaster Site Worker exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Compared with the 7.5-hour Disaster Site Worker course, the OSHA 15-hour Disaster Site Worker course is intended for which purpose?

A.Authorizing students to teach Outreach classes

B.Advanced operational response and hazardous cleanup concerns

C.Meeting the HAZWOPER 40-hour training requirement

D.Awareness-only training for office staff who never enter the site

Explanation: The 2024 OSHA Outreach Training Program Disaster Site Worker Procedures state that the 15-hour course 'is intended for advanced operational response and hazardous cleanup concerns,' with roughly double the instructional time of the 7.5-hour awareness course.

2Under the 2024 OSHA procedures, how does the 15-hour Disaster Site Worker course conclude?

A.With a 50-question proctored multiple-choice test

B.With an oral examination given by an OSHA compliance officer

C.With a final assessment in the form of an exercise that measures mastery of all course objectives

D.With submission of a written report on a past disaster

Explanation: The 2024 Disaster Site Worker Procedures require the 15-hour course to conclude with a final assessment in the form of an exercise measuring the participants' mastery of all course objectives, in addition to the individually scored respirator performance test.

3Which statement correctly describes how the 15-hour Disaster Site Worker course may be delivered?

A.It must be conducted in person; delivery by any video-conferencing platform is prohibited

B.It may be completed fully online through an authorized provider

C.Up to half of the hours may be delivered by webinar if the respirator test is in person

D.It may be self-paced if the student already holds an OSHA 30 card

Explanation: The 2024 procedures state the 7.5- and 15-hour Disaster Site Worker courses must be conducted in person, exceptions are not permitted, and training may not be conducted through any video-conferencing platform.

4A crane operator is called to an emergency response involving hazardous substances to lift debris. Under 29 CFR 1910.120(q)(4), what must this skilled support worker receive before working?

A.A 40-hour HAZWOPER certificate issued on site

B.A written exemption letter from the OSHA Area Office

C.An annual 8-hour refresher completed within the past month

D.An initial briefing at the site covering PPE use, the chemical hazards involved, and the duties to be performed

Explanation: 29 CFR 1910.120(q)(4) requires skilled support personnel to receive an initial briefing at the site, including instruction in wearing appropriate PPE, the chemical hazards involved, and the duties to be performed, plus all other appropriate safety and health precautions.

5What is the most important difference between a disaster site and a routine construction or demolition worksite?

A.Disaster sites never involve heavy equipment

B.At a disaster site the hazards are largely unknown and uncharacterized, and conditions can change without warning

C.OSHA standards do not apply at disaster sites

D.Disaster site work is always performed indoors

Explanation: On a planned construction project hazards are anticipated and controlled in advance; at a disaster site hazards have not been characterized, pre-planning is impossible, and conditions such as structural stability and weather can change suddenly.

6A demolition worker sees news coverage of a building collapse in a nearby city and wants to help. What is the correct way for the worker to become involved?

A.Drive to the scene immediately and start moving debris where help looks needed

B.Call the local news station and offer services on camera

C.Respond only through an official request (employer, mutual aid, or volunteer coordination) and check in through the Incident Command System on arrival

D.Enter the outer perimeter at night when access is easier

Explanation: Self-dispatching is prohibited: workers must be officially requested through their employer or a coordinating agency and must check in at the designated ICS check-in location so they are accounted for, briefed, and assigned.

7During which phase of a disaster response do most skilled support workers performing debris removal arrive, and what is the priority of the earlier phase?

A.They arrive during the recovery phase; the earlier rescue phase prioritizes locating and saving survivors

B.They arrive during the rescue phase; the earlier mitigation phase prioritizes debris removal

C.They arrive before first responders; the rescue phase prioritizes property protection

D.They arrive during the preparedness phase; the rescue phase prioritizes documentation

Explanation: The rescue phase focuses on life safety - locating and extricating survivors - and is dominated by trained search-and-rescue teams; most skilled support and cleanup workers are brought in during the longer recovery phase for debris removal and restoration.

8Per the 2024 procedures, the Disaster Site Worker curriculum applies equally to natural and man-made disasters with the exception of which lesson?

A.The Incident Command System lesson

B.The traumatic incident stress lesson

C.The respiratory protection lesson

D.The lesson on CBRNE (chemical, biological, radiological, nuclear, and explosive) agents

Explanation: OSHA states the curriculum applies equally to natural and man-made disasters 'except for the lesson on CBRNE agents,' since CBRNE agents are associated with man-made/terrorist events; trainers serving natural-disaster audiences add material specific to the anticipated disaster type.

9Which statement about the Department of Labor card earned by completing the 15-hour Disaster Site Worker course is TRUE?

A.It expires three years after the class end date

B.The Outreach program is voluntary, and the card does not satisfy the training requirements of any OSHA standard

C.It licenses the holder to supervise hazardous waste cleanup crews

D.It is issued directly by the OSHA Area Office to the student's employer

Explanation: OSHA's procedures state the Outreach Training Program is voluntary and does not meet training requirements contained in any OSHA standard, although some states and local jurisdictions mandate Outreach cards for site access.

10While clearing debris beside a fire-damaged masonry building, a worker notices a new diagonal crack widening across a load-bearing wall and hears creaking sounds. These observations indicate what?

A.Normal settling that can be ignored until the end of the shift

B.A problem only if the building is more than three stories tall

C.Warning signs of possible structural collapse requiring workers to move away and report immediately

D.A condition that only matters during demolition, not debris removal

Explanation: Growing cracks, leaning or bulging walls, and creaking or groaning sounds are classic warning signs of imminent structural failure; workers must withdraw to a safe distance and report so a competent person can evaluate the structure.

About the OSHA 15-Hr Disaster Site Worker Exam

The OSHA 15-Hour Disaster Site Worker course is the flagship Outreach Training Program class - aligned with OTI course #7600 - for workers who provide skilled support such as utility, demolition, debris removal, or heavy equipment operation, or cleanup services at natural and man-made disaster sites. Intended for advanced operational response and hazardous cleanup concerns, it roughly doubles the instructional time of the 7.5-hour awareness tier, including 3.5 hours on tool and equipment safety and 2.5 hours on physical hazards. Every student must pass a trainer-scored performance test on inspecting, donning, seal-checking, and doffing a half-face air-purifying respirator, and the course concludes with a final assessment exercise covering all course objectives. 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 15 instructional hours, delivered in person, typically over two days

Passing Score

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

Exam / Certification Fees

$300-$600 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.

Official sources

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.

9%

Characteristics of a Disaster

How disaster sites differ from construction sites (1.25 designated hours), natural vs man-made events, rescue vs recovery phases, skilled support personnel and the HAZWOPER 1910.120(q)(4) site briefing, the self-dispatch prohibition, and the voluntary DOL card

17%

Physical Hazard Awareness

Structural instability and secondary collapse triggers (2.5 designated hours), void spaces, downed lines and step potential, generator backfeed, confined-space atmospheres, floodwater forces and washouts, fall protection at 6 ft, hole covers, noise at 90 dBA, aftershocks, and underground utilities

17%

Health Hazards, CBRNE & Traumatic Stress

CBRNE agent recognition (nerve-agent toxidrome, anthrax, dirty bombs, secondary devices), time-distance-shielding, silica at the 50 ug/m3 PEL, asbestos in pre-1980 debris, carbon monoxide, bloodborne pathogens, mold, heat stroke, tetanus, plus buddy-system stress monitoring and 12-hour shift pacing

23%

Tool & Equipment Safety

The largest designated block (3.5 hours): generator placement and transfer switches, chainsaw kickback, chaps, and spring poles, GFCIs and damaged cords, heavy-equipment blind spots, swing-radius barricades and ROPS seatbelts, 10-ft power-line clearance, hot-work fire watch at 35 ft, gas cylinders, ladders, aerial lifts, skid steers, demolition engineering surveys, and rigging

17%

Risk Assessment & Hierarchy of Controls

Hazard identification first, probability-times-severity ranking, continuous reassessment as conditions change, stop-work responses, unknown-drum scenarios, and classifying elimination, substitution, engineering, administrative, and PPE controls in disaster conditions (2.5 designated hours combined)

6%

Incident Command System

ICS as a NIMS component, unity of command, 3-7 span of control with 5 optimal, designated check-in/checkout accountability, the Command Staff Safety Officer's stop-work authority, and the prohibition on freelancing (0.75 designated hours)

11%

Respiratory Protection & PPE

APR limitations (no oxygen supply, never below 19.5% O2 or in IDLH), APF 10 half-face, positive and negative user seal checks from the scored performance test, fit testing vs seal checks, N/R/P filter classes and magenta P100, cartridge color codes, facial-hair rules, EPA Levels A-D, hygiene, and take-home contamination

Preparing for the OSHA 15-Hr Disaster Site Worker Exam

What You Need to Know

Passing score: Successful completion of the individually scored respirator performance checklist and the concluding final assessment exercise
Assessment: Question count not published by the exam provider
Time limit: Minimum 15 instructional hours, delivered in person, typically over two days
Exam / certification fees: $300-$600 typical, set by the authorized trainer or provider Official sources

Using Our Practice Resources

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OSHA 15-Hr Disaster Site Worker: Suggested Study Strategy

1Drill the respirator sequence until automatic: inspect facepiece, straps, valves, and cartridges; don and adjust; then perform BOTH user seal checks - negative (palms over cartridge inlets, inhale, facepiece collapses, hold about 10 seconds) and positive (cover exhalation valve, exhale gently, no outward leak)

2Memorize the hard numbers: 19.5% oxygen-deficiency threshold, APF 10 for half-face APRs, 6-ft construction fall-protection trigger, 10-ft clearance from lines up to 50 kV, 35-ft hot-work combustible clearance, 90 dBA construction noise PEL, 50 ug/m3 silica PEL, and 6 inches of moving floodwater knocking an adult down

3Give the tool/equipment block its official weight - at 3.5 designated hours it is the biggest 15-hour topic: generator placement and backfeed, chainsaw kickback and spring poles, GFCIs, swing-radius barricades, ROPS seatbelts, skid-steer exit rules, and the 1926.850 demolition engineering survey

4Learn CBRNE recognition cues: pinpoint pupils and drooling for nerve agents, delayed onset for biologicals like anthrax, blast as the main dirty-bomb killer, time-distance-shielding for radiation, and never touching suspected secondary devices

5Classify disaster-site examples up and down the hierarchy of controls - de-energizing lines (elimination), electric instead of gasoline saws indoors (substitution), wet dust suppression (engineering), crew rotation (administrative), respirators (PPE)

6Master the ICS facts tested in the final exercise: unity of command, span of control 3-7 (optimal 5), designated check-in/checkout, the Safety Officer's stop-work authority, and the bans on freelancing and self-dispatching

Frequently Asked Questions

Who should take the OSHA 15-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. The 15-hour tier is intended for advanced operational response and hazardous cleanup concerns, while the 7.5-hour version is the awareness tier.

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

Both cover the same designated topic list, but the 15-hour course roughly doubles the depth: 2.5 hours on physical hazards (vs 1.0), 2.0 hours on health hazards (vs 0.5), and 3.5 hours on tool/equipment safety (vs 1.0). Both require the individually scored respirator performance test, and the 15-hour course concludes with a final assessment exercise measuring mastery of all course objectives.

Are there prerequisites for the 15-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 Construction or General Industry prerequisite reflect outdated procedures.

Can the 15-hour 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, which the trainer must score for each student individually, is a core reason for this rule.

How are students tested in the 15-hour 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, with a recommended 10:1 student-trainer ratio), and the course concludes with a final assessment exercise that measures mastery of all course objectives.

What does the 15-hour course cost and what card do graduates receive?

Providers typically charge about $300-$600 since pricing is set by the OSHA-authorized trainer or training organization. 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 date.

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 training requirements?

No. Outreach training is voluntary and does not meet the training requirements of any OSHA standard, including HAZWOPER (29 CFR 1910.120). Skilled support personnel called to an emergency instead receive an initial site briefing under 1910.120(q)(4) covering PPE use, the chemical hazards involved, and the duties to be performed.