Excavation Safety and Soil Properties Quiz
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Questions and Answers

_____ refers to the soil removed from an excavation

Spoils

Heaving or squeezing would be indicated by which of the following signs?

  • Dust clouds
  • Water pooling
  • A bulge at the bottom (correct)
  • A crack in the ground
  • ______ soil has a high clay content and is very durable and strong

    Cohesive

    Shaping a moist or wet sample of soil into a ball and rolling it into threads is called a ______ test.

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

    Oxygen concentration in the air is considered deficient if it drops below

    <p>19.5%</p> Signup and view all the answers

    Submerged soil or soil from which water is freely oozing may be classified as

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

    Which method of protection involves vertical sidewalls with horizontal struts?

    <p>Trench boxes</p> Signup and view all the answers

    Before excavation work begins, employers must

    <p>All of the above</p> Signup and view all the answers

    Study Notes

    Excavation Terminology

    • Spoils: The term for soil that is removed during excavation processes.
    • Heaving/Squeezing Signs: Indicated by a bulge at the bottom of the excavation site.

    Soil Properties

    • Cohesive Soil: High clay content, known for its durability and strength.
    • Plasticity Test: Involves shaping moist soil into a ball and rolling it into threads to assess its plasticity characteristics.

    Safety Standards

    • Oxygen Concentration: Considered deficient if it drops below 19.5%, posing health risks to workers.
    • Type C Soil Classification: Includes submerged soil or soil that freely oozes water, representing a specific risk category.

    Protection Methods

    • Trench Boxes: Method of protection featuring vertical sidewalls supported by horizontal struts, enhancing stability during excavation.

    Pre-Excavation Requirements

    • Employers must complete multiple preparatory actions before excavation work begins, ensuring compliance with safety regulations.

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    Description

    Test your knowledge on excavation terminology, soil properties, and safety standards. This quiz covers essential concepts like cohesive soil, trench boxes, and oxygen concentration levels to ensure safety during excavation. Perfect for professionals in the construction and engineering fields.

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