CHST FREE Construction Health and Safety Technician MCQ Questions and Answers 5 — Questions and Answers
Question 1: Under OSHA's cranes and derricks standard (29 CFR 1926.1408), what is the minimum required clearance distance from energized power lines up to 50 kV when no encroachment prevention measures are in place?
- 5 feet
- 10 feet (Correct answer)
- 15 feet
- 20 feet
Correct answer: 10 feet
OSHA requires a minimum 10-foot clearance from energized power lines up to 50 kV unless the line is de-energized or an exception applies.
Question 2: The CHST exam is administered by which certifying organization?
- OSHA Training Institute
- Board of Certified Safety Professionals (BCSP) (Correct answer)
- National Safety Council (NSC)
- American Society of Safety Professionals (ASSP)
Correct answer: Board of Certified Safety Professionals (BCSP)
The CHST credential is awarded and administered by the Board of Certified Safety Professionals (BCSP).
Question 3: When performing a root cause analysis after an incident, which tool is BEST suited for systematically identifying contributing causes by asking 'why' repeatedly?
- Fault tree analysis
- 5 Whys technique (Correct answer)
- Pareto chart
- Scatter diagram
Correct answer: 5 Whys technique
The 5 Whys technique involves asking 'why' up to five times to drill down from the symptom of a problem to its root cause.
Question 4: According to OSHA's respiratory protection standard (29 CFR 1910.134), a fit test is required:
- Every 5 years for tight-fitting respirators
- Annually for tight-fitting respirators and whenever the worker reports a change affecting fit (Correct answer)
- Only when a new model of respirator is issued
- Every 2 years or when the worker's weight changes by 20 lbs
Correct answer: Annually for tight-fitting respirators and whenever the worker reports a change affecting fit
OSHA requires fit testing annually and whenever the worker reports a facial change (weight loss/gain, dental work, scarring) that could affect the seal.
Question 5: Which safety principle does the phrase 'Heinrich's Triangle' (or Safety Triangle) represent?
- For every fatality there are a predictable number of minor injuries and near-misses at lower levels (Correct answer)
- The three levels of PPE hierarchy from primary to tertiary protection
- The relationship between frequency, severity, and probability in risk assessment
- The three parties responsible for safety: employer, employee, and regulator
Correct answer: For every fatality there are a predictable number of minor injuries and near-misses at lower levels
Heinrich's Triangle illustrates that for each serious injury there are many minor injuries and an even greater number of near-misses, suggesting near-miss control prevents major injuries.
Question 6: A construction supervisor observes a worker using an extension cord with a damaged outer jacket. The BEST immediate corrective action is to:
- Wrap the damaged section with electrical tape and continue use
- Remove the cord from service and replace it with an undamaged cord (Correct answer)
- Test the cord with a GFCI tester before continuing use
- Reduce the load on the cord to limit heat generation
Correct answer: Remove the cord from service and replace it with an undamaged cord
Damaged extension cords must be removed from service immediately; repairs by taping do not restore the cord's integrity and are not an acceptable remedy on construction sites.
Question 7: Under OSHA's heat illness prevention guidance, which physiological condition is considered the MOST severe heat-related illness requiring immediate emergency response?
- Heat cramps
- Heat syncope
- Heat exhaustion
- Heat stroke (Correct answer)
Correct answer: Heat stroke
Heat stroke is life-threatening, characterized by core body temperature above 104°F and altered mental status, requiring immediate cooling and emergency medical care.
CHST FREE Construction Health and Safety Technician MCQ Questions and Answers 5
Under OSHA's cranes and derricks standard (29 CFR 1926.1408), what is the minimum required clearance distance from energized power lines up to 50 kV when no encroachment prevention measures are in place?