Excavation Safety UPDATED SCRIPT 2026
PRACTICE SOLUTIONS GRADED A+
● What are the two types of confined spaces? Answer: 1. Permit-
required confined space (PRCS) - has real or potential hazards. 2. Non-
permit confined space (NPCS) - free of hazards that could cause death or
injury.
● What is the purpose of a confined-space entry permit? Answer: The
permit ensures that all safety measures are in place and that the space is
safe for entry, issued by a competent person and signed by a supervisor.
● What are the atmospheric hazards in confined spaces? Answer:
Atmospheric hazards can include insufficient or excessive oxygen,
explosive or flammable gases, and toxic gases.
● What is an oxygen-deficient atmosphere? Answer: An oxygen-
deficient atmosphere is one with oxygen levels below 19.5% by volume.
● What is an oxygen-enriched atmosphere? Answer: An oxygen-
enriched atmosphere is one with oxygen levels above 23.5% by volume.
● What are the symptoms of insufficient oxygen? Answer: Symptoms
include fast breathing and heartbeat, impaired mental judgment, extreme
, emotional reactions, unusual fatigue, nausea, inability to move freely,
loss of consciousness, and death.
● What is engulfment? Answer: Engulfment occurs when a worker is
buried by a liquid or material, such as grain or sand, entering a confined
space.
● What is the role of the attendant in a confined-space entry team?
Answer: The attendant monitors entrants, communicates with them, and
ensures unauthorized personnel do not enter the space.
● What is a non-entry rescue? Answer: A non-entry rescue is performed
by trained individuals outside the confined space using equipment like
winches to pull the entrant out without entering the space.
● What is an entry rescue? Answer: An entry rescue involves trained
rescue workers entering the confined space to assist an entrant in danger.
● What is the order of atmospheric testing in confined spaces? Answer:
1. Oxygen content 2. Flammable gases and vapors 3. Potential toxic
contaminants.
● What is the ideal oxygen level in a confined space? Answer: The ideal
oxygen level is 21% by volume.
PRACTICE SOLUTIONS GRADED A+
● What are the two types of confined spaces? Answer: 1. Permit-
required confined space (PRCS) - has real or potential hazards. 2. Non-
permit confined space (NPCS) - free of hazards that could cause death or
injury.
● What is the purpose of a confined-space entry permit? Answer: The
permit ensures that all safety measures are in place and that the space is
safe for entry, issued by a competent person and signed by a supervisor.
● What are the atmospheric hazards in confined spaces? Answer:
Atmospheric hazards can include insufficient or excessive oxygen,
explosive or flammable gases, and toxic gases.
● What is an oxygen-deficient atmosphere? Answer: An oxygen-
deficient atmosphere is one with oxygen levels below 19.5% by volume.
● What is an oxygen-enriched atmosphere? Answer: An oxygen-
enriched atmosphere is one with oxygen levels above 23.5% by volume.
● What are the symptoms of insufficient oxygen? Answer: Symptoms
include fast breathing and heartbeat, impaired mental judgment, extreme
, emotional reactions, unusual fatigue, nausea, inability to move freely,
loss of consciousness, and death.
● What is engulfment? Answer: Engulfment occurs when a worker is
buried by a liquid or material, such as grain or sand, entering a confined
space.
● What is the role of the attendant in a confined-space entry team?
Answer: The attendant monitors entrants, communicates with them, and
ensures unauthorized personnel do not enter the space.
● What is a non-entry rescue? Answer: A non-entry rescue is performed
by trained individuals outside the confined space using equipment like
winches to pull the entrant out without entering the space.
● What is an entry rescue? Answer: An entry rescue involves trained
rescue workers entering the confined space to assist an entrant in danger.
● What is the order of atmospheric testing in confined spaces? Answer:
1. Oxygen content 2. Flammable gases and vapors 3. Potential toxic
contaminants.
● What is the ideal oxygen level in a confined space? Answer: The ideal
oxygen level is 21% by volume.
