#1
Which of the following is a primary concern in excavation safety?
Preventing cave-ins
ExplanationEnsuring worker safety by avoiding collapse incidents.
#2
What is the purpose of a trench box in excavation safety?
To prevent cave-ins and protect workers
ExplanationAiding worker safety through structural reinforcement.
#3
Which of the following is a common hazard associated with excavation work?
Overhead power lines
ExplanationIdentifying and mitigating overhead risks.
#4
What is the main purpose of conducting soil analysis before excavation work?
To identify potential hazards and plan safety measures
ExplanationMitigating risks through informed decision-making.
#5
Which of the following factors can affect the stability of an excavation trench?
Depth of excavation
ExplanationUnderstanding depth's impact on structural integrity.
#6
What is the recommended slope angle for excavation walls in stable soil conditions?
60 degrees
ExplanationMaintaining stability while allowing for safe access.
#7
Which of the following protective systems relies on supports installed horizontally at various heights?
Shoring
ExplanationStrengthening trench walls to prevent collapse.
#8
What does the acronym 'OSHA' stand for in the context of excavation safety regulations in the United States?
Occupational Safety and Health Administration
ExplanationRegulatory body ensuring workplace safety standards.
#9
What type of soil is considered the most stable and presents the lowest risk of collapse in excavation work?
Rocky soil
ExplanationIdentifying soil types crucial for stability.
#10
What is the purpose of installing warning barriers around an excavation site?
To keep unauthorized personnel out
ExplanationPreventing unauthorized access for safety.
#11
What is the minimum clearance distance that should be maintained between a trench's edge and any heavy equipment operating nearby?
3 feet
ExplanationPreventing accidental damage and collapse risk.
#12
Which of the following factors can contribute to trench collapse?
Loose soil
ExplanationUnderstanding soil conditions crucial for stability.
#13
Which of the following is NOT a recommended safety practice when working in an excavation?
Ignoring warning signs of soil instability
ExplanationPrioritizing safety indicators for worker protection.
#14
What is the primary purpose of a trench box?
To prevent cave-ins and protect workers
ExplanationStructural reinforcement for worker safety.
#15
What does the acronym 'SOP' stand for in the context of excavation safety?
Standard Operating Procedure
ExplanationEstablished protocols for safe excavation practices.