NSC Workplace Safety 3 — Questions and Answers
Question 1: What is the minimum safe clearance distance from energized overhead power lines for unqualified workers?
- 3 feet
- 6 feet
- 10 feet (Correct answer)
- 15 feet
Correct answer: 10 feet
OSHA requires at least 10 feet of clearance from energized overhead power lines for unqualified workers using standard equipment.
Question 2: When must employees be trained on chemical hazards under OSHA's Hazard Communication Standard?
- Only after a chemical spill occurs
- At initial assignment and whenever new hazards are introduced (Correct answer)
- Annually regardless of new chemicals
- Only when handling chemicals without gloves
Correct answer: At initial assignment and whenever new hazards are introduced
HazCom training must occur at initial assignment and whenever a new chemical hazard is introduced to the workplace.
Question 3: What information is found in Section 8 of a Safety Data Sheet (SDS)?
- Physical and chemical properties
- Exposure controls and personal protection (Correct answer)
- First-aid measures
- Handling and storage guidelines
Correct answer: Exposure controls and personal protection
Section 8 covers exposure limits (PELs/TLVs) and recommended personal protective equipment for working with the chemical.
Question 4: Which of the following is an example of an administrative control for hazard reduction?
- Installing machine guards
- Rotating workers to limit exposure time (Correct answer)
- Providing respirators to employees
- Substituting a less toxic chemical
Correct answer: Rotating workers to limit exposure time
Administrative controls change work processes or schedules, such as job rotation to reduce cumulative hazardous exposure.
Question 5: What is the correct first step when applying lockout/tagout (LOTO) before servicing equipment?
- Apply the lockout device immediately
- Notify affected employees of the shutdown (Correct answer)
- Release all stored energy first
- Verify zero energy state
Correct answer: Notify affected employees of the shutdown
The first LOTO step is to notify all affected employees before beginning the energy isolation process.
Question 6: Carpal tunnel syndrome caused by repetitive hand motions is classified as which type of workplace condition?
- Acute traumatic injury
- Musculoskeletal disorder (MSD) (Correct answer)
- Chemical exposure illness
- Thermal stress disorder
Correct answer: Musculoskeletal disorder (MSD)
Carpal tunnel syndrome and similar repetitive-motion conditions are classified as musculoskeletal disorders linked to ergonomic risk factors.
Question 7: What is OSHA's permissible exposure limit (PEL) for noise during an 8-hour workday?
- 80 dBA
- 85 dBA
- 90 dBA (Correct answer)
- 95 dBA
Correct answer: 90 dBA
OSHA's 8-hour time-weighted average PEL for occupational noise exposure is 90 dBA.
NSC Workplace Safety 3
What is the minimum safe clearance distance from energized overhead power lines for unqualified workers?