CHST FREE Construction Health and Safety Technician Questions and Answers 4 — Questions and Answers
Question 1: Under OSHA 1926.403, what is the minimum clearance required between energized electrical conductors operating at 50 kV and unqualified workers?
- 6 feet
- 10 feet (Correct answer)
- 15 feet
- 20 feet
Correct answer: 10 feet
OSHA requires unqualified workers to maintain at least 10 feet of clearance from overhead lines up to 50 kV.
Question 2: Which hierarchy of controls level offers the highest level of worker protection?
- Administrative controls
- PPE
- Engineering controls
- Elimination (Correct answer)
Correct answer: Elimination
Elimination removes the hazard entirely, making it the most effective level in the hierarchy of controls.
Question 3: A scaffold plank must extend beyond its support at least how many inches but no more than 18 inches?
- 3 inches
- 6 inches (Correct answer)
- 9 inches
- 12 inches
Correct answer: 6 inches
OSHA 1926.451 requires scaffold planks to overhang supports by at least 6 inches and no more than 18 inches.
Question 4: What does the acronym 'IDLH' stand for in confined space and respiratory protection standards?
- Immediate Danger to Life and Health (Correct answer)
- Incident Detection Level for Hazardous materials
- Industrial Default Limit for Hazard
- Inhalation Dose Limit for Humans
Correct answer: Immediate Danger to Life and Health
IDLH (Immediately Dangerous to Life or Health) defines exposure concentrations that pose an immediate threat.
Question 5: During a confined space entry, the attendant's PRIMARY duty is to:
- Assist entrants with tools as needed
- Monitor entrants and maintain continuous communication (Correct answer)
- Operate rescue equipment inside the space
- Perform atmospheric testing inside the permit space
Correct answer: Monitor entrants and maintain continuous communication
The attendant must maintain continuous communication with entrants and be ready to initiate rescue, not enter the space.
Question 6: What is the minimum slope required to prevent ponding and improve drainage on a graded construction site under EPA stormwater regulations?
- 0.5%
- 1%
- 2% (Correct answer)
- 5%
Correct answer: 2%
A minimum 2% slope is typically required by EPA stormwater guidance to direct runoff away from structures and prevent ponding.
Question 7: A worker is struck by a vehicle on a construction site. Under OSHA recordkeeping rules (29 CFR 1904), this incident requires recording if the worker:
- Received any first aid treatment
- Missed one or more days of work (Correct answer)
- Filed a workers' compensation claim
- Visited the company nurse on-site
Correct answer: Missed one or more days of work
An injury resulting in days away from work is recordable under OSHA 1904.7 criteria.
CHST FREE Construction Health and Safety Technician Questions and Answers 4
Under OSHA 1926.403, what is the minimum clearance required between energized electrical conductors operating at 50 kV and unqualified workers?