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Certified Safety Professional (CSP) Exam | Latest
Verified Questions and Detailed Answers
OVERVIEW DESCRIPTION:
This comprehensive collection of Certified Safety Professional (CSP) questions is designed
covering core domains including risk assessment, hazard analysis (HAZOP, FTA, LOPA),
industrial hygiene (noise, chemical exposure, TLVs), safety management systems (ANSI
Z10, ISO 45001), incident investigation, system reliability, and regulatory compliance
(OSHA, PSM). Each question is formatted with a single correct answer and a concise, two-
sentence expert rationale to reinforce key principles. The set emphasizes application of
calculations (e.g., TRIR, dose, reliability, availability) and conceptual hierarchies (e.g.,
controls, ALARP, root cause analysis), with corrected computational items ensuring
accuracy.
QUESTION 1
A manufacturing facility operates a 40-ton bridge crane. The annual frequency of a
catastrophic failure is 1x10⁻⁴ per year, and the consequence is 10 fatalities. Which risk
reduction measure is most effective if the facility’s tolerable risk threshold is 1x10⁻⁵ per
year?
A) Reduce failure frequency to 5x10⁻⁵ per year
B) Reduce consequence to 1 fatality
C) Reduce failure frequency to 1x10⁻⁶ per year and consequence to 2 fatalities
D) Install an administrative control limiting crane access
CORRECT ANSWER: C
EXPERT RATIONALE: Risk = Frequency × Consequence. Original risk = 1x10⁻⁴ × 10 =
1x10⁻³. Option C yields 1x10⁻⁶ × 2 = 2x10⁻⁶, which is below the 1x10⁻⁵ threshold.
QUESTION 2
A safety professional is evaluating a chemical process with a failure rate of 0.05 failures
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per year. What is the reliability of this system over a 10-year period?
A) 0.50
B) 0.61
C) 0.95
D) 0.39
CORRECT ANSWER: B
EXPERT RATIONALE: Reliability R(t) = e^(-λt). λ = 0.05, t = 10, so e^(-0.5) = 0.6065 ≈
0.61.
QUESTION 3
Which hierarchy of controls provides the highest level of protection when dealing with a
toxic chemical vapor?
A) Local exhaust ventilation
B) Substitution with a less toxic chemical
C) Respiratory protection
D) Administrative controls limiting exposure time
CORRECT ANSWER: B
EXPERT RATIONALE: Substitution (elimination/substitution) is at the top of the hierarchy,
removing the hazard at its source rather than controlling exposure.
QUESTION 4
An incident investigation reveals a worker bypassed a machine guard. The root cause
analysis shows the guard made routine cleaning impossible. Which corrective action
addresses the root cause?
A) Retrain the worker on lockout/tagout procedures
B) Redesign the guard to allow easy cleaning without removal
C) Discipline the worker for safety violation
D) Increase supervisor surveillance
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CORRECT ANSWER: B
EXPERT RATIONALE: Root cause is a design flaw making compliance difficult; redesign
eliminates the conflict between productivity and safety.
QUESTION 5
What is the primary purpose of a Preliminary Hazard Analysis (PHA) in system safety?
A) To quantify failure probabilities of components
B) To identify hazards early in the design phase
C) To calculate overall system reliability
D) To determine root causes after an accident
CORRECT ANSWER: B
EXPERT RATIONALE: PHA is performed early in system development to identify potential
hazards before design details are finalized.
QUESTION 6
A company’s Total Recordable Incident Rate (TRIR) is 3.2 based on 100 full-time workers.
If the company adds 50 more workers with the same injury experience, what is the new
TRIR?
A) 2.1
B) 3.2
C) 4.8
D) 1.6
CORRECT ANSWER: B
EXPERT RATIONALE: TRIR is a rate per 100 full-time equivalent workers; adding more
workers with identical injury frequency leaves the rate unchanged.
QUESTION 7
In a fault tree analysis, an OR gate with inputs A (probability 0.1) and B (probability 0.2)
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has what top event probability?
A) 0.02
B) 0.3
C) 0.28
D) 0.12
CORRECT ANSWER: C
EXPERT RATIONALE: For OR gate: P(top) = P(A)+P(B)-P(A∩B). Assuming independence,
0.1+0.2-(0.1×0.2)=0.28.
QUESTION 8
Which occupational exposure limit assumes that no adverse health effects occur at any
exposure level?
A) TLV-STEL
B) REL-C
C) Threshold Limit Value-Ceiling
D) TLV for a sensitizer
CORRECT ANSWER: D
EXPERT RATIONALE: For sensitizers, there is often no safe threshold; any exposure may
cause sensitization in susceptible individuals.
QUESTION 9
A safety professional conducts a job safety analysis (JSA) for a task. What is the correct
sequence of steps?
A) Identify hazards, break job into steps, recommend controls
B) Break job into steps, identify hazards, recommend controls
C) Recommend controls, break job into steps, identify hazards
D) Identify hazards, recommend controls, break job into steps
CORRECT ANSWER: B
Certified Safety Professional (CSP) Exam | Latest
Verified Questions and Detailed Answers
OVERVIEW DESCRIPTION:
This comprehensive collection of Certified Safety Professional (CSP) questions is designed
covering core domains including risk assessment, hazard analysis (HAZOP, FTA, LOPA),
industrial hygiene (noise, chemical exposure, TLVs), safety management systems (ANSI
Z10, ISO 45001), incident investigation, system reliability, and regulatory compliance
(OSHA, PSM). Each question is formatted with a single correct answer and a concise, two-
sentence expert rationale to reinforce key principles. The set emphasizes application of
calculations (e.g., TRIR, dose, reliability, availability) and conceptual hierarchies (e.g.,
controls, ALARP, root cause analysis), with corrected computational items ensuring
accuracy.
QUESTION 1
A manufacturing facility operates a 40-ton bridge crane. The annual frequency of a
catastrophic failure is 1x10⁻⁴ per year, and the consequence is 10 fatalities. Which risk
reduction measure is most effective if the facility’s tolerable risk threshold is 1x10⁻⁵ per
year?
A) Reduce failure frequency to 5x10⁻⁵ per year
B) Reduce consequence to 1 fatality
C) Reduce failure frequency to 1x10⁻⁶ per year and consequence to 2 fatalities
D) Install an administrative control limiting crane access
CORRECT ANSWER: C
EXPERT RATIONALE: Risk = Frequency × Consequence. Original risk = 1x10⁻⁴ × 10 =
1x10⁻³. Option C yields 1x10⁻⁶ × 2 = 2x10⁻⁶, which is below the 1x10⁻⁵ threshold.
QUESTION 2
A safety professional is evaluating a chemical process with a failure rate of 0.05 failures
,2|Page
per year. What is the reliability of this system over a 10-year period?
A) 0.50
B) 0.61
C) 0.95
D) 0.39
CORRECT ANSWER: B
EXPERT RATIONALE: Reliability R(t) = e^(-λt). λ = 0.05, t = 10, so e^(-0.5) = 0.6065 ≈
0.61.
QUESTION 3
Which hierarchy of controls provides the highest level of protection when dealing with a
toxic chemical vapor?
A) Local exhaust ventilation
B) Substitution with a less toxic chemical
C) Respiratory protection
D) Administrative controls limiting exposure time
CORRECT ANSWER: B
EXPERT RATIONALE: Substitution (elimination/substitution) is at the top of the hierarchy,
removing the hazard at its source rather than controlling exposure.
QUESTION 4
An incident investigation reveals a worker bypassed a machine guard. The root cause
analysis shows the guard made routine cleaning impossible. Which corrective action
addresses the root cause?
A) Retrain the worker on lockout/tagout procedures
B) Redesign the guard to allow easy cleaning without removal
C) Discipline the worker for safety violation
D) Increase supervisor surveillance
,3|Page
CORRECT ANSWER: B
EXPERT RATIONALE: Root cause is a design flaw making compliance difficult; redesign
eliminates the conflict between productivity and safety.
QUESTION 5
What is the primary purpose of a Preliminary Hazard Analysis (PHA) in system safety?
A) To quantify failure probabilities of components
B) To identify hazards early in the design phase
C) To calculate overall system reliability
D) To determine root causes after an accident
CORRECT ANSWER: B
EXPERT RATIONALE: PHA is performed early in system development to identify potential
hazards before design details are finalized.
QUESTION 6
A company’s Total Recordable Incident Rate (TRIR) is 3.2 based on 100 full-time workers.
If the company adds 50 more workers with the same injury experience, what is the new
TRIR?
A) 2.1
B) 3.2
C) 4.8
D) 1.6
CORRECT ANSWER: B
EXPERT RATIONALE: TRIR is a rate per 100 full-time equivalent workers; adding more
workers with identical injury frequency leaves the rate unchanged.
QUESTION 7
In a fault tree analysis, an OR gate with inputs A (probability 0.1) and B (probability 0.2)
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has what top event probability?
A) 0.02
B) 0.3
C) 0.28
D) 0.12
CORRECT ANSWER: C
EXPERT RATIONALE: For OR gate: P(top) = P(A)+P(B)-P(A∩B). Assuming independence,
0.1+0.2-(0.1×0.2)=0.28.
QUESTION 8
Which occupational exposure limit assumes that no adverse health effects occur at any
exposure level?
A) TLV-STEL
B) REL-C
C) Threshold Limit Value-Ceiling
D) TLV for a sensitizer
CORRECT ANSWER: D
EXPERT RATIONALE: For sensitizers, there is often no safe threshold; any exposure may
cause sensitization in susceptible individuals.
QUESTION 9
A safety professional conducts a job safety analysis (JSA) for a task. What is the correct
sequence of steps?
A) Identify hazards, break job into steps, recommend controls
B) Break job into steps, identify hazards, recommend controls
C) Recommend controls, break job into steps, identify hazards
D) Identify hazards, recommend controls, break job into steps
CORRECT ANSWER: B
