CSP Certified Safety Professional (CSP) Comprehensive 3

Question 1

What does the term 'IDLH' stand for in industrial hygiene and what is its primary purpose?

Accepted Answer

Immediately Dangerous to Life or Health; defines concentrations requiring SCBA or equivalent

Answer

IDLH (Immediately Dangerous to Life or Health) represents the maximum concentration from which a worker could escape within 30 minutes without irreversible health effects, and requires supplied-air respirators.

Question 2

Under NFPA 70E, electrical work requiring an energized electrical work permit typically involves circuits operating above what voltage threshold when exposed energized conductors are within the restricted approach boundary?

Accepted Answer

50 volts

Answer

NFPA 70E applies shock protection requirements beginning at 50 volts and above, where the risk of electric shock and arc flash becomes significant.

Question 3

Which of the following best describes the 'Swiss Cheese Model' of accident causation?

Accepted Answer

Accidents occur when holes in multiple defensive layers align, allowing a hazard to cause harm

Answer

James Reason's Swiss Cheese Model depicts safety defenses as slices with holes; accidents occur when holes in multiple layers align to create an unobstructed path to harm.

Question 4

A worker is exposed to three chemicals simultaneously: Chemical A at 50% of its PEL, Chemical B at 30% of its PEL, and Chemical C at 40% of its PEL. Using the additive mixture formula, is the combined exposure acceptable?

Accepted Answer

No, because the sum of fractions (1.2) exceeds 1.0

Answer

For additive mixtures, the sum of fractions (0.50 + 0.30 + 0.40 = 1.20) must not exceed 1.0; this exposure exceeds the combined limit.

Question 5

Under OSHA 29 CFR 1910.147 (Lockout/Tagout), which employees must receive training when LOTO procedures are implemented?

Accepted Answer

Both authorized employees and affected employees

Answer

OSHA 1910.147 requires training for both authorized employees (who apply LOTO devices) and affected employees (who operate or work in areas where LOTO is used).

Certified Safety Professional Exam Practice Test

Certified Safety Professional Exam Practice Test

CSP Certified Safety Professional (CSP) Comprehensive 3