CHST General MCQ 2 — Questions and Answers
Question 1: Under OSHA's Hazard Communication Standard (HazCom 2012), how many sections must a Safety Data Sheet (SDS) contain?
- 8 sections
- 12 sections
- 16 sections (Correct answer)
- 20 sections
Correct answer: 16 sections
GHS-aligned SDS documents must contain exactly 16 standardized sections covering hazard identification, composition, first aid, handling, and more.
Question 2: What is the minimum safe distance from energized overhead power lines rated at 50 kV or below that OSHA requires for uninsulated equipment?
- 5 feet
- 10 feet (Correct answer)
- 15 feet
- 20 feet
Correct answer: 10 feet
OSHA 29 CFR 1926.550 requires a minimum clearance of 10 feet from power lines up to 50 kV for uninsulated equipment and workers.
Question 3: Which hierarchy of controls level is considered most effective for eliminating workplace hazards?
- Administrative controls
- Engineering controls
- PPE
- Elimination (Correct answer)
Correct answer: Elimination
Elimination — physically removing the hazard — is the most effective control because it removes the source of risk entirely rather than managing exposure.
Question 4: A Job Hazard Analysis (JHA) should be reviewed and updated when which of the following occurs?
- A new employee joins the crew
- An incident or near-miss occurs (Correct answer)
- The supervisor requests it annually
- OSHA conducts a routine inspection
Correct answer: An incident or near-miss occurs
JHAs must be reviewed after any incident or near-miss to determine if the existing hazard controls were adequate or need revision.
Question 5: What does the term 'competent person' mean under OSHA construction standards?
- A licensed professional engineer
- Someone with 10+ years of construction experience
- One capable of identifying hazards and authorized to take corrective action (Correct answer)
- A certified safety professional with a CHST credential
Correct answer: One capable of identifying hazards and authorized to take corrective action
OSHA defines a competent person as one who can identify existing and predictable hazards and who has authority to take prompt corrective measures.
Question 6: What is the maximum noise exposure allowed by OSHA for an 8-hour workday without hearing protection?
- 80 dBA
- 85 dBA
- 90 dBA (Correct answer)
- 95 dBA
Correct answer: 90 dBA
OSHA's permissible exposure limit (PEL) for noise is 90 dBA as an 8-hour time-weighted average (TWA) under 29 CFR 1926.52.
Question 7: Which type of fire extinguisher is appropriate for Class C (energized electrical equipment) fires?
- Water-based extinguisher
- CO2 or dry chemical extinguisher (Correct answer)
- Class K wet chemical extinguisher
- Class B foam extinguisher
Correct answer: CO2 or dry chemical extinguisher
CO2 and dry chemical extinguishers are non-conductive and rated for Class C electrical fires; water-based extinguishers conduct electricity and are dangerous.
CHST General MCQ 2
Under OSHA's Hazard Communication Standard (HazCom 2012), how many sections must a Safety Data Sheet (SDS) contain?