FREE Construction Health and Safety Technician MCQ Questions and Answers Flashcards

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?

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.

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?

Answer: 4 hours

OSHA's noise PEL table specifies that 95 dBA is permissible for a maximum of 4 hours per workday.

Which OSHA standard establishes requirements for controlling hazardous energy during servicing and maintenance of machinery?

Answer: 29 CFR 1910.147

29 CFR 1910.147 is the OSHA lockout/tagout standard that controls hazardous energy during servicing and maintenance activities.

When conducting a Job Hazard Analysis (JHA), what is the FIRST step in the process?

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.

According to OSHA's scaffold standard, what is the minimum safe working load for scaffold planks used on light-duty scaffolds?

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.

A construction site generates soil contaminated with lead paint chips. Under what regulatory framework is disposal of this material typically governed?

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.

What does the hierarchy of controls prescribe as the MOST effective method to reduce workplace hazards?

Answer: Elimination

Elimination—physically removing the hazard—is the most effective control measure in the hierarchy because it completely removes the risk.