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Questions and Answers
Which type of trenching is used to protect workers in an excavation or trench?
Which type of trenching is used to protect workers in an excavation or trench?
- Straight cut trenching without shoring
- Open cut trenching without shoring
- Sloped cut trenching without shoring
- Straight cut trenching with shoring (correct)
What should be done prior to the commencement of any trenching?
What should be done prior to the commencement of any trenching?
- Notify and locate utility companies (correct)
- Hand-expose underground lines
- Consult a professional engineer
- Use a gas monitor
Where should access to the excavation be from?
Where should access to the excavation be from?
- The upwind side (correct)
- The downwind side
- The side with the most slope
- The side with the least slope
What is the purpose of a ground disturbance permit for excavation or trenching?
What is the purpose of a ground disturbance permit for excavation or trenching?
Which of the following is NOT a hazard associated with ground disturbance, excavation, and trenching?
Which of the following is NOT a hazard associated with ground disturbance, excavation, and trenching?
What is the definition of a trench?
What is the definition of a trench?
What are the methods used to protect workers from the caving in, sloughing, or collapsing of walls or sides in an excavation or trench?
What are the methods used to protect workers from the caving in, sloughing, or collapsing of walls or sides in an excavation or trench?
Which of the following is NOT a hazard associated with ground disturbance, excavation, and trenching?
Which of the following is NOT a hazard associated with ground disturbance, excavation, and trenching?
What is the purpose of shoring in an excavation or trench?
What is the purpose of shoring in an excavation or trench?
What is the definition of ground disturbance?
What is the definition of ground disturbance?
What is the purpose of a ground disturbance permit for excavation or trenching?
What is the purpose of a ground disturbance permit for excavation or trenching?
When heavy equipment and structures are located near the trench, what should be done?
When heavy equipment and structures are located near the trench, what should be done?
What should be done if overhead power lines are close to the excavation?
What should be done if overhead power lines are close to the excavation?
What should be done to ensure the trench is free of toxic or explosive gases?
What should be done to ensure the trench is free of toxic or explosive gases?
Which of the following is NOT a hazard associated with ground disturbance, excavation, and trenching?
Which of the following is NOT a hazard associated with ground disturbance, excavation, and trenching?
What is the purpose of a ground disturbance permit for excavation or trenching?
What is the purpose of a ground disturbance permit for excavation or trenching?
What is the definition of ground disturbance?
What is the definition of ground disturbance?
Which of the following is NOT a requirement for workers in an excavation or trench?
Which of the following is NOT a requirement for workers in an excavation or trench?
What is the purpose of a ground disturbance permit for excavation or trenching?
What is the purpose of a ground disturbance permit for excavation or trenching?
What should be done to protect overhead power lines close to the excavation?
What should be done to protect overhead power lines close to the excavation?
Which type of trenching is NOT used to protect workers in an excavation or trench?
Which type of trenching is NOT used to protect workers in an excavation or trench?
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Study Notes
Hazards and Procedures for Excavation
- An excavation is any cut, cavity, trench, or depression resulting from rock or soil removal.
- A trench is an excavation less than 3.7m wide at the bottom, over 1.2m deep, and of any length.
- Ground disturbance is any work that results in a disturbance or displacement of the earth greater than 30 cm.
- Hazards associated with excavation include collapsing walls, contact with buried services, confined spaces, and falling objects.
- Excavation methods such as shoring or sloping are used to protect workers from collapsing walls.
- Shoring involves using aluminum, steel, or wood panels to support walls or sides of an excavation.
- Sloping involves cutting back the excavation wall at an inclined angle away from the work area.
- Trenching methods to protect workers include straight cut trenching with shoring and open cut trenching with proper sloping on the sides.
- Ongoing observation of soil conditions is necessary due to variations caused by weather and time.
- Prior to trenching, utility companies must be notified and utilities located, with protection or removal of overhead power lines if necessary.
- All underground lines must be hand-exposed under the direction of the supervisor.
- Workers in or around an open excavation or trench must follow a written ground disturbance or excavation permit to ensure safety and prevent harm to workers, the environment, and buried services or adjacent structures.
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Description
Test your knowledge on excavation hazards and procedures with this quiz. Learn about common excavation definitions and permits while ensuring your understanding of safety precautions.
