CSP Certified Safety Professional (CSP) Random 4 — Questions and Answers
Question 1: The 'Swiss Cheese Model' of accident causation, developed by James Reason, illustrates that accidents occur when:
- A single catastrophic failure causes immediate harm
- Holes in multiple defensive layers align, allowing a hazard to reach a victim (Correct answer)
- Human error is the sole root cause of every accident
- Safety barriers are absent in a system
Correct answer: Holes in multiple defensive layers align, allowing a hazard to reach a victim
Reason's Swiss Cheese Model shows that accidents result from multiple simultaneous failures in layered defenses, not a single cause.
Question 2: A confined space is classified as a 'permit-required confined space' (PRCS) under 29 CFR 1910.146 when it:
- Is large enough to enter but not designed for continuous occupancy
- Has limited means of entry/exit only
- Contains or has the potential to contain a serious hazard (Correct answer)
- Requires a ladder for entry
Correct answer: Contains or has the potential to contain a serious hazard
A PRCS is a confined space that additionally contains or has potential for a serious safety or health hazard such as a hazardous atmosphere, engulfment, or entrapment.
Question 3: What is the primary purpose of a Safety Management System (SMS) gap analysis?
- To identify recordable incidents that were not reported
- To compare current safety performance against a desired standard or benchmark (Correct answer)
- To calculate the total cost of workplace injuries
- To train employees on new safety procedures
Correct answer: To compare current safety performance against a desired standard or benchmark
A gap analysis identifies the difference between current safety management practices and the desired or required standard, informing improvement priorities.
Question 4: Which toxicological concept describes the relationship where two chemicals together produce an effect LESS than the sum of their individual effects?
- Synergism
- Potentiation
- Antagonism (Correct answer)
- Additive effect
Correct answer: Antagonism
Antagonism occurs when combined chemical exposures produce a health effect less than the sum of individual effects, meaning one chemical reduces the toxicity of another.
Question 5: Under OSHA's Bloodborne Pathogens Standard (29 CFR 1910.1030), the Exposure Control Plan must be reviewed and updated at minimum:
- Monthly
- Quarterly
- Annually (Correct answer)
- Every three years
Correct answer: Annually
The Exposure Control Plan must be reviewed and updated at least annually and whenever tasks or procedures affecting occupational exposure are modified.
Question 6: The ACGIH Threshold Limit Value – Short Term Exposure Limit (TLV-STEV) is defined as a 15-minute TWA that should not be exceeded more than how many times per work shift?
- 2 times
- 4 times (Correct answer)
- 6 times
- 8 times
Correct answer: 4 times
The TLV-STEL may not be exceeded more than 4 times per day, with at least 60 minutes between each STEL excursion.
Question 7: The 'domino theory' of accident causation, proposed by H.W. Heinrich, suggests that accidents are primarily caused by:
- System failures and latent organizational weaknesses
- Unsafe acts of persons, which account for approximately 88% of all accidents (Correct answer)
- Environmental hazards and mechanical failures equally
- Management failures at the executive level
Correct answer: Unsafe acts of persons, which account for approximately 88% of all accidents
Heinrich's domino theory proposed that ~88% of accidents result from unsafe acts of persons, though this proportion has been debated by modern safety researchers.
CSP Certified Safety Professional (CSP) Random 4
The 'Swiss Cheese Model' of accident causation, developed by James Reason, illustrates that accidents occur when: