Excavations OSHA-10 Quiz
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Questions and Answers

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?

    5 to 15 feet

    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?

    <p>Excavation made entirely out of stable rock or less than five feet in depth with no indications of cave-in.</p> Signup and view all the answers

    Which of the following is a way to protect yourself when working around excavations? (Select all that apply)

    <p>Slope or bench the sides of the excavation</p> Signup and view all the answers

    What is a hazard that needs to be addressed when employees are working within an excavation that is more than 4 feet deep?

    <p>Access and egress</p> Signup and view all the answers

    What type of excavation protection will address unstable walls of an excavation at risk for a cave-in?

    <p>Shoring</p> Signup and view all the answers

    What type of excavation protection will address cave-in and water accumulation due to excess soil?

    <p>Correctly placed spoils</p> Signup and view all the answers

    What is the minimum distance that excavation materials must be kept back from the excavation's edge?

    <p>2 feet</p> Signup and view all the answers

    At what depth must a ladder, ramp, steps, or runway be present for quick worker exit?

    <p>4 feet</p> Signup and view all the answers

    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?

    <p>False</p> Signup and view all the answers

    Among many responsibilities, a competent person is responsible for evaluating soil conditions and providing safe access. Is this true or false?

    <p>True</p> Signup and view all the answers

    According to OSHA standards, a competent person is defined as someone who can identify hazards and take corrective measures. Is this true or false?

    <p>True</p> Signup and view all the answers

    Whose responsibility is it to protect workers from cave-ins and other excavation-related hazards?

    <p>Employer</p> Signup and view all the answers

    What type of soil is cohesive but has been cracked or disturbed, or is located near sources of vibration?

    <p>Type B</p> Signup and view all the answers

    Unless made in entirely stable rock, at what depth is a protective system required for a trench?

    <p>5 feet and greater</p> Signup and view all the answers

    What are the three main protection methods against cave-ins?

    <p>Shields, shoring, and sloping</p> Signup and view all the answers

    Whose responsibility is it to keep excavated dirt, rocks, and other materials back two feet from the excavation's edge?

    <p>Employer</p> Signup and view all the answers

    What type of soil is cohesive and has high unconfined compressive strength?

    <p>Type A</p> Signup and view all the answers

    Your employer can protect you from hazards when an excavation is less than how deep?

    <p>5 feet</p> Signup and view all the answers

    Which of these is known as the greatest danger associated with excavations?

    <p>Cave-ins</p> Signup and view all the answers

    Whose responsibility is it to correct hazards that can be corrected?

    <p>Worker</p> Signup and view all the answers

    Whose responsibility is it to inspect the excavation at least daily and throughout the shift?

    <p>Employer</p> Signup and view all the answers

    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.

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