Podcast
Questions and Answers
Which of the following is an excavation hazard? (Select all that apply)
Which of the following is an excavation hazard? (Select all that apply)
- Fire (correct)
- Toxic fumes (correct)
- Asphyxiation (correct)
- None of the above
Most excavation accidents occur at what depth?
Most excavation accidents occur at what depth?
5 to 15 feet
What is the greatest risk present at an excavation site?
What is the greatest risk present at an excavation site?
Cave-ins
What two requirements must be met so that a trench does not need to have a protective system installed?
What two requirements must be met so that a trench does not need to have a protective system installed?
Which of the following is a way to protect yourself when working around excavations? (Select all that apply)
Which of the following is a way to protect yourself when working around excavations? (Select all that apply)
What is a hazard that needs to be addressed when employees are working within an excavation that is more than 4 feet deep?
What is a hazard that needs to be addressed when employees are working within an excavation that is more than 4 feet deep?
What type of excavation protection will address unstable walls of an excavation at risk for a cave-in?
What type of excavation protection will address unstable walls of an excavation at risk for a cave-in?
What type of excavation protection will address cave-in and water accumulation due to excess soil?
What type of excavation protection will address cave-in and water accumulation due to excess soil?
What is the minimum distance that excavation materials must be kept back from the excavation's edge?
What is the minimum distance that excavation materials must be kept back from the excavation's edge?
At what depth must a ladder, ramp, steps, or runway be present for quick worker exit?
At what depth must a ladder, ramp, steps, or runway be present for quick worker exit?
In order for a worker to be considered competent, they only need to have specific training in identifying hazards and are authorized to eliminate hazards. Is this true or false?
In order for a worker to be considered competent, they only need to have specific training in identifying hazards and are authorized to eliminate hazards. Is this true or false?
Among many responsibilities, a competent person is responsible for evaluating soil conditions and providing safe access. Is this true or false?
Among many responsibilities, a competent person is responsible for evaluating soil conditions and providing safe access. Is this true or false?
According to OSHA standards, a competent person is defined as someone who can identify hazards and take corrective measures. Is this true or false?
According to OSHA standards, a competent person is defined as someone who can identify hazards and take corrective measures. Is this true or false?
Whose responsibility is it to protect workers from cave-ins and other excavation-related hazards?
Whose responsibility is it to protect workers from cave-ins and other excavation-related hazards?
What type of soil is cohesive but has been cracked or disturbed, or is located near sources of vibration?
What type of soil is cohesive but has been cracked or disturbed, or is located near sources of vibration?
Unless made in entirely stable rock, at what depth is a protective system required for a trench?
Unless made in entirely stable rock, at what depth is a protective system required for a trench?
What are the three main protection methods against cave-ins?
What are the three main protection methods against cave-ins?
Whose responsibility is it to keep excavated dirt, rocks, and other materials back two feet from the excavation's edge?
Whose responsibility is it to keep excavated dirt, rocks, and other materials back two feet from the excavation's edge?
What type of soil is cohesive and has high unconfined compressive strength?
What type of soil is cohesive and has high unconfined compressive strength?
Your employer can protect you from hazards when an excavation is less than how deep?
Your employer can protect you from hazards when an excavation is less than how deep?
Which of these is known as the greatest danger associated with excavations?
Which of these is known as the greatest danger associated with excavations?
Whose responsibility is it to correct hazards that can be corrected?
Whose responsibility is it to correct hazards that can be corrected?
Whose responsibility is it to inspect the excavation at least daily and throughout the shift?
Whose responsibility is it to inspect the excavation at least daily and throughout the shift?
Study Notes
Excavation Hazards
- Main excavation hazards include fire, toxic fumes, and asphyxiation.
- Most accidents occur at depths of 5 to 15 feet.
- Cave-ins are the most significant risk in excavation sites.
Trench Safety Requirements
- Protective systems are not required if the trench is made completely of stable rock or is less than 5 feet deep, evaluated by a competent individual.
- When working in excavations over 4 feet deep, hazards like access and egress must be addressed.
Protective Measures
- To protect against cave-ins, slopes, benches, and supports should be used.
- Shoring is essential when excavation walls are unstable.
- Correctly placed spoils help manage risks from water accumulation and cave-ins.
Safety Regulations
- Excavation materials must be kept at least 2 feet from the edge as per safety guidelines.
- A ladder, ramp, steps, or runway must be present for quick exits at depths of 4 feet or greater.
- A competent individual must have broader training and knowledge than just hazard identification.
Competent Person Definition
- A competent person is responsible for evaluating soil conditions, testing for hazardous gases, and ensuring safe access.
- They have the authority to take immediate corrective actions.
Employer and Worker Responsibilities
- Employers are responsible for protecting workers from cave-ins and related hazards.
- Workers must correct hazards that they can address.
- Employers must inspect excavations daily or as needed throughout the shift.
Soil Types
- Type A soil is cohesive with high unconfined compressive strength (e.g., clay, silty clay).
- Type B soil is also cohesive but can be cracked, disturbed, or affected by vibrations (e.g., angular gravel, silt loam).
Protective System Requirements
- A protective system is mandated for trenches at depths of 5 feet or greater unless the excavation is entirely in stable rock.
- Three main protection methods against cave-ins are shields, shoring, and sloping.
Key Facts
- Cave-ins are the primary danger related to excavations; proper protective systems are vital for safety.
- Employers are tasked with maintaining safe working conditions and preventing access issues.
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Description
Test your knowledge on excavation hazards with this OSHA-10 quiz. Learn about the risks associated with excavation sites, including cave-ins and common accident depths. Perfect for those preparing for safety certifications or workers in construction.
