Questions and Answers
_____ refers to the soil removed from an excavation
Spoils
Heaving or squeezing would be indicated by which of the following signs?
______ 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.
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Oxygen concentration in the air is considered deficient if it drops below
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Submerged soil or soil from which water is freely oozing may be classified as
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Which method of protection involves vertical sidewalls with horizontal struts?
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Before excavation work begins, employers must
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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.
