Confined Spaces RIIWHS202E Questions and Answers 2026
Updated | Confined Space Entry Assessment Answers +
Competency Questions + Verified Solutions | Complete Student
Guide for Assessment Tasks, Unit Questions and Answers, Hazard
Identification, Risk Control, Entry Permits, Atmospheric Testing,
and Competency-Based Assessment Preparation
Question 1: Which of the following best defines a confined space according to AS
2865-2009?
A. Any enclosed area where workers perform routine maintenance tasks
B. A space that is large enough for a person to enter, has limited entry/exit, and is not
designed for continuous occupancy
C. Any storage tank or vessel used in industrial processes
D. A workspace with restricted headroom requiring special access equipment
CORRECT ANSWER: B. A space that is large enough for a person to enter, has
limited entry/exit, and is not designed for continuous occupancy
RATIONALE:AS 2865-2009 defines a confined space as an enclosed or partially
enclosed space that is not designed or intended for continuous human occupancy, has
limited or restricted means of entry or exit, and may pose risks to health and safety due
to its design, location, contents, or work activities performed within it
sydneysafety.com.au
.
Question 2: What is the primary purpose of a confined space entry permit?
A. To record the names of all workers on site for payroll purposes
B. To provide legal documentation for insurance claims
C. To ensure all hazards have been identified, controls implemented, and authorisation
granted before entry
D. To schedule maintenance activities for equipment within the space
CORRECT ANSWER: C. To ensure all hazards have been identified, controls
implemented, and authorisation granted before entry
RATIONALE:A confined space entry permit is a critical control document that verifies
hazards have been assessed, appropriate controls are in place, atmospheric testing has
been conducted, and authorised personnel have approved entry, ensuring compliance
with workplace procedures and regulatory requirements
corrsafe.com.au
.
Question 3: Before entering a confined space, atmospheric testing must be
conducted in which order?
,A. Toxic gases, flammable gases, oxygen levels
B. Oxygen levels, flammable gases, toxic gases
C. Flammable gases, oxygen levels, toxic gases
D. All gases can be tested in any order as long as testing occurs
CORRECT ANSWER: B. Oxygen levels, flammable gases, toxic gases
RATIONALE:Atmospheric testing should follow the sequence of oxygen first (to ensure
the meter functions properly and the environment is breathable), then flammable gases
(as many meters require adequate oxygen for combustible gas sensors), followed by
toxic gases, ensuring comprehensive hazard identification before entry
training.gov.au
.
Question 4: Which personal protective equipment is considered the minimum
requirement for entry into a confined space with unknown atmospheric
conditions?
A. Safety glasses and steel-capped boots only
B. Full-face respirator with appropriate cartridges
C. Self-contained breathing apparatus (SCBA) or supplied-air respirator
D. Disposable dust mask and gloves
CORRECT ANSWER: C. Self-contained breathing apparatus (SCBA) or supplied-air
respirator
RATIONALE:When atmospheric conditions are unknown or potentially hazardous,
respiratory protection must provide a guaranteed supply of breathable air. SCBA or
supplied-air respirators provide this protection, whereas air-purifying respirators cannot
be relied upon in oxygen-deficient or immediately dangerous to life or health (IDLH)
atmospheres
training.gov.au
.
Question 5: What is the acceptable oxygen concentration range for safe entry into a
confined space?
A. 15.0% to 19.0%
B. 19.5% to 23.5%
C. 20.0% to 25.0%
D. 18.0% to 22.0%
CORRECT ANSWER: B. 19.5% to 23.5%
RATIONALE:AS 2865-2009 specifies that oxygen levels between 19.5% and 23.5% by
volume are considered safe for entry. Levels below 19.5% indicate oxygen deficiency
risking asphyxiation, while levels above 23.5% increase fire and explosion hazards
,sydneysafety.com.au
.
Question 6: Who is responsible for maintaining continuous communication with
workers inside a confined space?
A. The site supervisor
B. The safety officer
C. The stand-by person
D. The entry permit issuer
CORRECT ANSWER: C. The stand-by person
RATIONALE:The stand-by person (also known as the attendant or hole watch) has the
specific duty to maintain constant communication with entrants, monitor conditions,
and initiate emergency procedures if needed. This role must remain outside the
confined space and focused solely on monitoring the entry operation
training.gov.au
.
Question 7: Which hazard is NOT typically associated with confined spaces?
A. Engulfment by loose materials
B. Exposure to extreme temperatures
C. Excessive natural lighting
D. Accumulation of toxic gases
CORRECT ANSWER: C. Excessive natural lighting
RATIONALE:Confined spaces typically suffer from poor lighting, not excessive natural
lighting. Common hazards include atmospheric contaminants, oxygen deficiency,
engulfment, extreme temperatures, mechanical hazards, and limited entry/exit, all of
which increase risk to workers
praxis42.com
.
Question 8: What does the term "lock-out/tag-out" refer to in confined space
operations?
A. Securing the entry point to prevent unauthorised access
B. Isolating energy sources to prevent accidental activation of equipment
C. Locking personal belongings before entry
D. Tagging equipment for maintenance scheduling
CORRECT ANSWER: B. Isolating energy sources to prevent accidental activation of
equipment
, RATIONALE:Lock-out/tag-out procedures involve physically isolating and securing all
energy sources (electrical, mechanical, hydraulic, pneumatic, chemical, thermal) that
could endanger workers in a confined space, preventing unexpected energisation or
release of hazardous energy
acceleratedtraining.com.au
.
Question 9: When must atmospheric monitoring continue during confined space
work?
A. Only before initial entry
B. Before entry and at the discretion of the worker
C. Before entry and continuously or at regular intervals during occupancy
D. Only if workers report symptoms of exposure
CORRECT ANSWER: C. Before entry and continuously or at regular intervals during
occupancy
RATIONALE:Atmospheric conditions in confined spaces can change rapidly due to work
activities, ventilation changes, or material releases. Continuous or regular interval
monitoring ensures hazards are detected promptly, allowing for timely evacuation if
conditions become unsafe
training.gov.au
.
Question 10: Which document provides critical information about chemical
hazards present in a confined space?
A. Equipment maintenance log
B. Safety Data Sheet (SDS)
C. Worker training records
D. Site evacuation map
CORRECT ANSWER: B. Safety Data Sheet (SDS)
RATIONALE:Safety Data Sheets contain essential information about hazardous
substances, including health effects, exposure limits, handling procedures, and
emergency measures. SDS must be consulted during risk assessment and made
accessible to workers entering confined spaces where chemicals are present
training.gov.au
.
Question 11: What is the primary reason for ventilating a confined space before and
during entry?
Updated | Confined Space Entry Assessment Answers +
Competency Questions + Verified Solutions | Complete Student
Guide for Assessment Tasks, Unit Questions and Answers, Hazard
Identification, Risk Control, Entry Permits, Atmospheric Testing,
and Competency-Based Assessment Preparation
Question 1: Which of the following best defines a confined space according to AS
2865-2009?
A. Any enclosed area where workers perform routine maintenance tasks
B. A space that is large enough for a person to enter, has limited entry/exit, and is not
designed for continuous occupancy
C. Any storage tank or vessel used in industrial processes
D. A workspace with restricted headroom requiring special access equipment
CORRECT ANSWER: B. A space that is large enough for a person to enter, has
limited entry/exit, and is not designed for continuous occupancy
RATIONALE:AS 2865-2009 defines a confined space as an enclosed or partially
enclosed space that is not designed or intended for continuous human occupancy, has
limited or restricted means of entry or exit, and may pose risks to health and safety due
to its design, location, contents, or work activities performed within it
sydneysafety.com.au
.
Question 2: What is the primary purpose of a confined space entry permit?
A. To record the names of all workers on site for payroll purposes
B. To provide legal documentation for insurance claims
C. To ensure all hazards have been identified, controls implemented, and authorisation
granted before entry
D. To schedule maintenance activities for equipment within the space
CORRECT ANSWER: C. To ensure all hazards have been identified, controls
implemented, and authorisation granted before entry
RATIONALE:A confined space entry permit is a critical control document that verifies
hazards have been assessed, appropriate controls are in place, atmospheric testing has
been conducted, and authorised personnel have approved entry, ensuring compliance
with workplace procedures and regulatory requirements
corrsafe.com.au
.
Question 3: Before entering a confined space, atmospheric testing must be
conducted in which order?
,A. Toxic gases, flammable gases, oxygen levels
B. Oxygen levels, flammable gases, toxic gases
C. Flammable gases, oxygen levels, toxic gases
D. All gases can be tested in any order as long as testing occurs
CORRECT ANSWER: B. Oxygen levels, flammable gases, toxic gases
RATIONALE:Atmospheric testing should follow the sequence of oxygen first (to ensure
the meter functions properly and the environment is breathable), then flammable gases
(as many meters require adequate oxygen for combustible gas sensors), followed by
toxic gases, ensuring comprehensive hazard identification before entry
training.gov.au
.
Question 4: Which personal protective equipment is considered the minimum
requirement for entry into a confined space with unknown atmospheric
conditions?
A. Safety glasses and steel-capped boots only
B. Full-face respirator with appropriate cartridges
C. Self-contained breathing apparatus (SCBA) or supplied-air respirator
D. Disposable dust mask and gloves
CORRECT ANSWER: C. Self-contained breathing apparatus (SCBA) or supplied-air
respirator
RATIONALE:When atmospheric conditions are unknown or potentially hazardous,
respiratory protection must provide a guaranteed supply of breathable air. SCBA or
supplied-air respirators provide this protection, whereas air-purifying respirators cannot
be relied upon in oxygen-deficient or immediately dangerous to life or health (IDLH)
atmospheres
training.gov.au
.
Question 5: What is the acceptable oxygen concentration range for safe entry into a
confined space?
A. 15.0% to 19.0%
B. 19.5% to 23.5%
C. 20.0% to 25.0%
D. 18.0% to 22.0%
CORRECT ANSWER: B. 19.5% to 23.5%
RATIONALE:AS 2865-2009 specifies that oxygen levels between 19.5% and 23.5% by
volume are considered safe for entry. Levels below 19.5% indicate oxygen deficiency
risking asphyxiation, while levels above 23.5% increase fire and explosion hazards
,sydneysafety.com.au
.
Question 6: Who is responsible for maintaining continuous communication with
workers inside a confined space?
A. The site supervisor
B. The safety officer
C. The stand-by person
D. The entry permit issuer
CORRECT ANSWER: C. The stand-by person
RATIONALE:The stand-by person (also known as the attendant or hole watch) has the
specific duty to maintain constant communication with entrants, monitor conditions,
and initiate emergency procedures if needed. This role must remain outside the
confined space and focused solely on monitoring the entry operation
training.gov.au
.
Question 7: Which hazard is NOT typically associated with confined spaces?
A. Engulfment by loose materials
B. Exposure to extreme temperatures
C. Excessive natural lighting
D. Accumulation of toxic gases
CORRECT ANSWER: C. Excessive natural lighting
RATIONALE:Confined spaces typically suffer from poor lighting, not excessive natural
lighting. Common hazards include atmospheric contaminants, oxygen deficiency,
engulfment, extreme temperatures, mechanical hazards, and limited entry/exit, all of
which increase risk to workers
praxis42.com
.
Question 8: What does the term "lock-out/tag-out" refer to in confined space
operations?
A. Securing the entry point to prevent unauthorised access
B. Isolating energy sources to prevent accidental activation of equipment
C. Locking personal belongings before entry
D. Tagging equipment for maintenance scheduling
CORRECT ANSWER: B. Isolating energy sources to prevent accidental activation of
equipment
, RATIONALE:Lock-out/tag-out procedures involve physically isolating and securing all
energy sources (electrical, mechanical, hydraulic, pneumatic, chemical, thermal) that
could endanger workers in a confined space, preventing unexpected energisation or
release of hazardous energy
acceleratedtraining.com.au
.
Question 9: When must atmospheric monitoring continue during confined space
work?
A. Only before initial entry
B. Before entry and at the discretion of the worker
C. Before entry and continuously or at regular intervals during occupancy
D. Only if workers report symptoms of exposure
CORRECT ANSWER: C. Before entry and continuously or at regular intervals during
occupancy
RATIONALE:Atmospheric conditions in confined spaces can change rapidly due to work
activities, ventilation changes, or material releases. Continuous or regular interval
monitoring ensures hazards are detected promptly, allowing for timely evacuation if
conditions become unsafe
training.gov.au
.
Question 10: Which document provides critical information about chemical
hazards present in a confined space?
A. Equipment maintenance log
B. Safety Data Sheet (SDS)
C. Worker training records
D. Site evacuation map
CORRECT ANSWER: B. Safety Data Sheet (SDS)
RATIONALE:Safety Data Sheets contain essential information about hazardous
substances, including health effects, exposure limits, handling procedures, and
emergency measures. SDS must be consulted during risk assessment and made
accessible to workers entering confined spaces where chemicals are present
training.gov.au
.
Question 11: What is the primary reason for ventilating a confined space before and
during entry?
