#1
Which of the following is a primary concern in excavation safety?
Preventing cave-ins
Ensuring proper lighting
Minimizing noise pollution
Reducing paperwork
#2
What is the purpose of a trench box in excavation safety?
To provide access to the excavation site
To serve as a formwork for pouring concrete
To prevent cave-ins and protect workers
To store excavation equipment
#3
Which of the following is a common hazard associated with excavation work?
Overhead power lines
Excessive wind
Rainy weather
Daylight hours
#4
What is the main purpose of conducting soil analysis before excavation work?
To determine the best location for excavation
To estimate the cost of the excavation project
To identify potential hazards and plan safety measures
To establish property boundaries
#5
Which of the following factors can affect the stability of an excavation trench?
Temperature fluctuations
Humidity levels
Rainfall intensity
Depth of excavation
#6
What is the recommended slope angle for excavation walls in stable soil conditions?
45 degrees
60 degrees
90 degrees
30 degrees
#7
Which of the following protective systems relies on supports installed horizontally at various heights?
Sloping
Shielding
Shoring
Benching
#8
What does the acronym 'OSHA' stand for in the context of excavation safety regulations in the United States?
Occupational Safety and Health Administration
Occupational Safety and Hazard Administration
Operational Safety and Health Administration
Occupational Health and Safety Association
#9
What type of soil is considered the most stable and presents the lowest risk of collapse in excavation work?
Sandy soil
Loamy soil
Rocky soil
Clayey soil
#10
What is the purpose of installing warning barriers around an excavation site?
To keep unauthorized personnel out
To provide shade for workers
To mark the location of underground utilities
To create a barrier against wildlife
#11
What is the minimum clearance distance that should be maintained between a trench's edge and any heavy equipment operating nearby?
5 feet
10 feet
3 feet
7 feet
#12
Which of the following factors can contribute to trench collapse?
Loose soil
Compact soil
Placing excavated soil close to the edge
Shoring
#13
Which of the following is NOT a recommended safety practice when working in an excavation?
Using proper protective equipment
Regularly inspecting the excavation site
Ignoring warning signs of soil instability
Providing adequate ventilation
#14
What is the primary purpose of a trench box?
To provide access to the excavation site
To protect workers from falling debris
To prevent cave-ins and protect workers
To store excavation equipment
#15
What does the acronym 'SOP' stand for in the context of excavation safety?
Safety Operations Procedure
Standard Operating Procedure
Site Operations Protocol
Systematic Operations Plan