CHST FREE Construction Health and Safety Technician MCQ Questions and Answers 3 — Questions and Answers
Question 1: Under OSHA's excavation standard (29 CFR 1926 Subpart P), what is the minimum depth at which a protective system is required for a trench in Type C soil?
- 2 feet
- 4 feet
- 5 feet (Correct answer)
- 6 feet
Correct answer: 5 feet
OSHA requires a protective system for any trench 5 feet or deeper, regardless of soil type, unless the excavation is made entirely in stable rock.
Question 2: A worker is exposed to a noise level of 95 dBA for the entire 8-hour shift. According to OSHA's permissible exposure limit table, how long may a worker be exposed to 95 dBA before reaching the PEL?
- 2 hours
- 4 hours (Correct answer)
- 6 hours
- 8 hours
Correct answer: 4 hours
OSHA's noise PEL table specifies that 95 dBA is permissible for a maximum of 4 hours per workday.
Question 3: Which OSHA standard establishes requirements for controlling hazardous energy during servicing and maintenance of machinery?
- 29 CFR 1926.417
- 29 CFR 1910.147 (Correct answer)
- 29 CFR 1926.500
- 29 CFR 1910.333
Correct answer: 29 CFR 1910.147
29 CFR 1910.147 is the OSHA lockout/tagout standard that controls hazardous energy during servicing and maintenance activities.
Question 4: When conducting a Job Hazard Analysis (JHA), what is the FIRST step in the process?
- Identify hazards associated with each step
- Determine corrective actions
- Select the job to be analyzed (Correct answer)
- List the steps of the job in sequence
Correct answer: Select the job to be analyzed
The first step in a JHA is selecting which job to analyze, typically prioritizing jobs with high injury rates or serious potential hazards.
Question 5: According to OSHA's scaffold standard, what is the minimum safe working load for scaffold planks used on light-duty scaffolds?
- 25 lbs/sq ft
- 50 lbs/sq ft (Correct answer)
- 75 lbs/sq ft
- 100 lbs/sq ft
Correct answer: 50 lbs/sq ft
OSHA requires light-duty scaffolds to support at least 25 pounds per square foot of the platform area, but standard plank ratings begin at 50 lbs/sq ft for light-duty classification.
Question 6: A construction site generates soil contaminated with lead paint chips. Under what regulatory framework is disposal of this material typically governed?
- OSHA 29 CFR 1926.62
- EPA RCRA regulations (Correct answer)
- DOT HazMat regulations
- NIOSH criteria documents
Correct answer: EPA RCRA regulations
Disposal of hazardous waste including lead-contaminated soil is governed by the EPA's Resource Conservation and Recovery Act (RCRA) regulations.
Question 7: What does the hierarchy of controls prescribe as the MOST effective method to reduce workplace hazards?
- Administrative controls
- Personal protective equipment
- Elimination (Correct answer)
- Engineering controls
Correct answer: Elimination
Elimination—physically removing the hazard—is the most effective control measure in the hierarchy because it completely removes the risk.
CHST FREE Construction Health and Safety Technician MCQ Questions and Answers 3
Under OSHA's excavation standard (29 CFR 1926 Subpart P), what is the minimum depth at which a protective system is required for a trench in Type C soil?