CSP Certified Safety Professional (CSP) Comprehensive 5 — Questions and Answers
Question 1: Under 29 CFR 1910.119 (Process Safety Management of Highly Hazardous Chemicals), what is the primary purpose of a Process Hazard Analysis (PHA)?
- To train operators on normal startup and shutdown procedures
- To identify, evaluate, and control hazards involved in the process (Correct answer)
- To document all chemical inventories for EPA reporting requirements
- To establish emergency response procedures for chemical releases
Correct answer: To identify, evaluate, and control hazards involved in the process
A PHA systematically identifies and evaluates hazards associated with highly hazardous chemical processes and provides recommendations to control those hazards.
Question 2: In the context of industrial hygiene sampling, what does a 'time-weighted average' (TWA) specifically measure?
- The peak concentration of a contaminant recorded at any single moment during a shift
- The average airborne concentration of a substance over a specific time period, typically 8 hours (Correct answer)
- The total cumulative dose of a substance absorbed by a worker over an entire career
- The minimum concentration at which a substance becomes detectable by sampling equipment
Correct answer: The average airborne concentration of a substance over a specific time period, typically 8 hours
An 8-hour TWA represents the average airborne concentration an employee is exposed to over a standard workday, used to compare against OSHA PELs and ACGIH TLVs.
Question 3: Which type of fire suppression system activates all sprinkler heads simultaneously when triggered, making it suitable for high-hazard areas such as aircraft hangars?
- Wet pipe system
- Dry pipe system
- Deluge system (Correct answer)
- Pre-action system
Correct answer: Deluge system
A deluge system has open sprinkler heads and activates all heads simultaneously when the deluge valve opens, providing massive water application suitable for high-hazard occupancies.
Question 4: When calculating noise dose for a worker exposed to multiple noise levels, which regulation specifies the 5-dB exchange rate used by OSHA?
- 29 CFR 1910.95 uses a 3-dB exchange rate for computing dose
- 29 CFR 1910.95 uses a 5-dB exchange rate, while NIOSH recommends 3-dB (Correct answer)
- 29 CFR 1910.95 uses a 5-dB exchange rate and NIOSH also uses 5-dB
- There is no federal standard; exchange rates are set by each state plan
Correct answer: 29 CFR 1910.95 uses a 5-dB exchange rate, while NIOSH recommends 3-dB
OSHA's 29 CFR 1910.95 uses a 5-dB exchange rate (doubling dose for every 5-dB increase), while NIOSH recommends a more protective 3-dB exchange rate based on equal energy principles.
Question 5: A safety professional reviews an incident and finds that a worker bypassed a machine guard because production pressure made it inconvenient. Which root cause category does this BEST represent?
- Equipment failure
- Environmental condition
- Management system deficiency (Correct answer)
- Random human error
Correct answer: Management system deficiency
Production pressure that encourages bypassing safety controls reflects a management system deficiency in enforcing safety policies and balancing production with safety priorities.
Question 6: Under OSHA's Walking-Working Surfaces standard (29 CFR 1910 Subpart D), fall protection is generally required for unprotected edges and floor openings at what minimum height?
- 2 feet
- 4 feet (Correct answer)
- 6 feet
- 10 feet
Correct answer: 4 feet
OSHA's general industry standard (29 CFR 1910.28) requires fall protection at heights of 4 feet or more for most walking-working surfaces.
Question 7: Which statistical measure is used to express the strength of the relationship between two continuous variables in occupational health research?
- Chi-square statistic
- Pearson correlation coefficient (Correct answer)
- Odds ratio
- Attributable risk fraction
Correct answer: Pearson correlation coefficient
The Pearson correlation coefficient (r) measures the linear relationship between two continuous variables, ranging from -1 to +1, commonly used in occupational health research.
CSP Certified Safety Professional (CSP) Comprehensive 5
Under 29 CFR 1910.119 (Process Safety Management of Highly Hazardous Chemicals), what is the primary purpose of a Process Hazard Analysis (PHA)?