WSO Examinations

  • An applicant for certification is required to meet the academic and/or experience qualifications outlined in the WSO Professional Certification Program, the WSO Hazardous Materials Certification Program, the WSO Instructor Certification Program, and the WSO Governmental Certification Program.
  • Each applicant is evaluated by the WSO Certification Board to ensure these requirements have been met.
  • Approval by the Board is necessary before the applicant is permitted to undertake the written examination.

Examination Passing Rate: A passing score of 75% must be achieved. Any further question, please email us contact@worldsafety.org.vn

Examination Format:

  • Every applicant will be asked the essay question, “What have you accomplished in the past twelve months which you consider an important contribution to safety disciplines or your professional expertise?” This is to be answered in no more than 100 words.
  • After completing the essay questions, the applicant is allowed three hours to complete approximately 250 multiple-choice and true/false questions designed to measure the broad spectrum of knowledge fundamental to a practicing safety professional.
  • The questions in the WSO-CSS examination are divided into two parts. The first 150 questions measure the applicant’s general safety knowledge. The second 100 questions test his/her expertise in the designated area of specialization.
  • Examinations for WSO Hazardous Materials certifications contain some fill-in-the-blank questions.

Examination Monitors:

  • WSO certification exams must be proctored, whether taken online or written. Where available and/or practical, the exam must be taken at a Sylvan Learning Center.
  • Sylvan Learning Center has partnered with WSO to make this service available to the applicant at an hourly rate (payable directly to Sylvan Learning Center at the time of the exam; fees vary by location). Sylvan Learning Center has over 800 centers worldwide. To find a location near you, search the Sylvan Learning Center website www.sylvanlearning.com/locations.
  • For applicants who do not have a Sylvan Learning Center  in close proximity, arrangements must be made with a local college/university, institution, library, employer, or other acceptable monitoring facility or WSO Vietnam National office. In this case, arrangement must be made for supervision of the exam by an acceptable monitor (local librarian, personnel manager, college professor, etc.). The applicant is responsible for payment of any monitoring fee designated by the monitoring facility.

Test Procedure:

  • The WSO Certification Director will notify the applicant of approval to sit for a WSO Certification exam.
  • This notification will contain a hyperlink and password for the exam, as well as an identification verification form to be printed and submitted to the monitoring facility at the time of examination.
  • The applicant’s identification must be verified by the acceptable designee of the monitoring facility before the exam is administered.
  • At the end of the three-hour examination period, the monitor will email the verification form and a signed statement that the applicant was under his/her supervision during the entire examination period.
  • For applicants requesting a written exam, the exam will be mailed directly to the monitor.
  • At the end of the three-hour examination period, the monitor will place the essay and examination answer sheets in the provided envelope and return them to the WSO Certification Director, USA with a signed statement that the applicant was under his/her supervision during the entire examination period.

Exam Sample Questions

1. In Safety Planning for plant production facilities machines are a primary factor.
True
False

2. No high hazard processes involving flammable and reactive materials should be performed in enclosed buildings.
True
False

3. Safety requirements for floor and wall openings and nonresidential stair and railing systems have standards established by .
A. DOT
B. NFPA
C. OSHA
D. ANSI

4. The National Electrical Code covers proper electrical wiring and electrical installations.
A. NFPA
B. OSHA
C. EPA
D. ANSI

Exam Sample Questions

5. Heavy-duty trucks require when hauling.
A. 1 truck-length allowance at loading dock entrance
B. Roadways 50 feet (15 m) wide
C. Maximum grade of 15%
D. All the above

6. A special permit issued by the EPA allows for depositing waste into a public sewage system.
A. Radioactive
B. Flammable
C. Corrosive
D. None of the Above
E. All of the above

7. Fatal and serious confined space injuries are often the result of:
A. Undetected Hazards
B. Limited Ventilation
C. Electrical Hazards
D. All of the Above
E. None of the above

8. Safety color codes for marking physical hazards are provided in:
A. DOT 90-343
B. OSHA 29 CFR.1922
C. ANSI Z.53.1
D. None of the above

Reference Books for Exams

Given the above assumption, preparation for the examinations may require the use of sources not referenced. The number of references could be cost prohibitive to purchase, but could be obtained from a local library. Hopefully, many of these publications are already a part of the applicant’s personal library.

The questions in the examination reflect the complexity of problems typically found in the day to day work of the safety professional. The answer to given questions may require integrating knowledge from several sources or subject areas. Questions may also involve the application of techniques to novel situations. These examinations assume that the candidate has kept informed of the current technical literature and has developed the ability to combine knowledge and experience to solve problems encountered within his or her field of expertise.

With the above information and study of the references, a safety professional should be able to successfully complete the required exams to accomplish certification. Following is a listing of publications that should be used in your preparations for the examinations.

The Core Subject References (books) may be used during the examination:

  1. Accident Prevention Manual for Business & Industry (Engineering and Technology) 11th ed., NSC, Chicago, 1997.
  2. Fire Protection Handbook, 18th ed, Cote, Arthur E, P.E.
  3. National Fire Protection Association, Quincy, Massachusetts, 1997.
  4. Fundamentals of Industrial Hygiene 4th ed.: NSC, Chicago, 1996
  5. International Association Of Drilling Contractors, Accident Prevention Reference Guide Houston, Texas 1998 (for the Oil Well Specialization only)

The Supplemental References may NOT be used during the examination. 

  1. Systems Analysis/Design for Safety (Brown, Prentice Hall, 1976)
  2. Pattys Industrial Hygiene & Toxicology (Clayton, 34d Ed. Val 1, 1978)
  3. US/DOL, OSHA Industrial Hygiene Field Operations Manual, 1979
  4. US/DOL, OSHA General Industry Standards, 29CFR 1910
  5. US/DOL, OSHA Field Operations Manual
  6. Resource Conservation and Recovery Act (RCRA)
  7. Fed. Insecticide, Fungicide & Rodenticide Act (EPA, 1975) M,S)
  8. Toxic Substances Control act (EPA, 1977) (E,M)
  9. Hazardous Waste Sites & Hazardous Substances Emergencies (NIOSH, USDHSS’, 1982) (E,M,S)
  10. Air Sampling Instruments for Evaluation of Atmospheric Contaminants (ACGIH, 5th Ed., 1978) (S)
  11. Electronic Security Systems, 2nd Ed., Philip Walker 1988 (D)
  12. ANSI 88.2-1980 (S)
  13. Environmental Engineering & Sanitation (Salvato-Wylie Interscience, 1982) (S)
  14. NFPA Life Safety Code 101, National Fire Protection Assn. (E,M,S)
  15. Introduction to Security, 3rd Ed., G. Green, 1981 (D)
  16. Sanitarians’ Handbook: Theory and Practice for Environmental Health, Freadman-Peerls Publications, 1977 (S)
  17. Public Health Law Manual, Grad, APHA 1975 (E,M)
  18. Security Administration: An Introduction, 3rd Ed. R Post – A Kingsbury, 1977 (D)
  19. 29 CFR 1910 – 120 (OSHA Regulations) (HM)
  20. Hazardous Materials Response Handbook, Martin F. Henry, (NFPA), Covers NFPA 471 and NFPA 472 (HM)
  21. DOT Guidebook for Initial Response to Hazardous Materials (HM)
  22. Fire Protection Guide on Hazardous Materials (NFPA) (HM)
  23. Hazardous Waste Handbook for Health and Safety, William F. Martin, John M. Lippitt, Timothy G. Prothero (HM)
  24. NIOSH Certified Equipment List, U.S. Dept. of Health & Human Services
  25. Federal Rules, Acts, Amendments, etc.: Clean Air Act; Clean Water Act; Toxic Substances Control Act; Resource
  26. Conser-vation and Recovery Act; Comprehensive Environmental Response, Compensation and Liability Act;
  27. Hazardous Solid Waste Amendments; Superfund Amendments and Re-authorization Act (HM)
  28. Hazardous Waste/Identification & Classification Manual, Travis P. Wagner
  29. US DOT HM 181 (HM)

​You can purchase these books from Amazone

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