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CIRO PRACTICE EXAM – PART 1, 2, 3 Questions with Answers &
Rationales | Latest Update
PART 1Safety Standards & Practices (20) • Electricity (15) •
Heat Flow
Section 1: Safety Standards & Practices (Questions 1–20)
Question 1
Which organization establishes the Process Safety Management
(PSM) standard for highly hazardous chemicals such as
ammonia?
A. EPA
B. OSHA
C. IIAR
D. ASHRAE
Answer: B
Rationale: OSHA’s Process Safety Management (PSM) standard
(29 CFR 1910.119) applies to facilities with ammonia above the
threshold quantity.
Question 2
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What is the OSHA Permissible Exposure Limit (PEL) for ammonia
as an 8-hour time-weighted average?
A. 10 ppm
B. 25 ppm
C. 50 ppm
D. 100 ppm
Answer: C
Rationale: OSHA PEL for ammonia is 50 ppm TWA; STEL is 35
ppm; IDLH is 300 ppm.
Question 3
Which of the following is the correct action when a large
ammonia leak is detected?
A. Investigate without PPE
B. Evacuate the area and notify emergency responders
C. Start fans only
D. Continue normal operations
Answer: B
Rationale: Immediate evacuation and notification are priorities;
only trained personnel with proper PPE should respond.
Question 4
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What does the acronym LOTO stand for?
A. Lock Out, Tag Out
B. Lock Open, Turn Off
C. Limit Oil Temperature Output
D. Load Overload Trip Override
Answer: A
Rationale: Lockout/Tagout controls hazardous energy during
maintenance and repair.
Question 5
When is a confined space entry permit required?
A. Whenever entering a vessel that may contain a hazardous
atmosphere or has limited entry/exit
B. Only when the space is below ground
C. Only when the space is hot
D. Never for refrigeration equipment
Answer: A
Rationale: Confined space entry requires a permit and
atmospheric testing when potential hazards exist.
Question 6
Which of the following is the correct order for PPE donning?
A. Gloves, respirator, suit
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B. Respirator, suit, gloves
C. Suit, gloves, respirator
D. Any order is acceptable
Answer: B
Rationale: Respirator is donned first to ensure breathing
protection, followed by protective clothing and gloves. Follow
manufacturer’s instructions.
Question 7
What is the purpose of an emergency action plan?
A. To assign blame after an incident
B. To outline actions to take during an emergency to protect
personnel
C. To replace safety training
D. To record maintenance activities
Answer: B
Rationale: Emergency action plans provide procedures for
evacuation, reporting, and response to protect lives.
Question 8
Which type of respirator is generally required for ammonia
emergency response at concentrations above IDLH?
A. Dust mask
4|Page
CIRO PRACTICE EXAM – PART 1, 2, 3 Questions with Answers &
Rationales | Latest Update
PART 1Safety Standards & Practices (20) • Electricity (15) •
Heat Flow
Section 1: Safety Standards & Practices (Questions 1–20)
Question 1
Which organization establishes the Process Safety Management
(PSM) standard for highly hazardous chemicals such as
ammonia?
A. EPA
B. OSHA
C. IIAR
D. ASHRAE
Answer: B
Rationale: OSHA’s Process Safety Management (PSM) standard
(29 CFR 1910.119) applies to facilities with ammonia above the
threshold quantity.
Question 2
1|Page
, Page |2
What is the OSHA Permissible Exposure Limit (PEL) for ammonia
as an 8-hour time-weighted average?
A. 10 ppm
B. 25 ppm
C. 50 ppm
D. 100 ppm
Answer: C
Rationale: OSHA PEL for ammonia is 50 ppm TWA; STEL is 35
ppm; IDLH is 300 ppm.
Question 3
Which of the following is the correct action when a large
ammonia leak is detected?
A. Investigate without PPE
B. Evacuate the area and notify emergency responders
C. Start fans only
D. Continue normal operations
Answer: B
Rationale: Immediate evacuation and notification are priorities;
only trained personnel with proper PPE should respond.
Question 4
2|Page
, Page |3
What does the acronym LOTO stand for?
A. Lock Out, Tag Out
B. Lock Open, Turn Off
C. Limit Oil Temperature Output
D. Load Overload Trip Override
Answer: A
Rationale: Lockout/Tagout controls hazardous energy during
maintenance and repair.
Question 5
When is a confined space entry permit required?
A. Whenever entering a vessel that may contain a hazardous
atmosphere or has limited entry/exit
B. Only when the space is below ground
C. Only when the space is hot
D. Never for refrigeration equipment
Answer: A
Rationale: Confined space entry requires a permit and
atmospheric testing when potential hazards exist.
Question 6
Which of the following is the correct order for PPE donning?
A. Gloves, respirator, suit
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, Page |4
B. Respirator, suit, gloves
C. Suit, gloves, respirator
D. Any order is acceptable
Answer: B
Rationale: Respirator is donned first to ensure breathing
protection, followed by protective clothing and gloves. Follow
manufacturer’s instructions.
Question 7
What is the purpose of an emergency action plan?
A. To assign blame after an incident
B. To outline actions to take during an emergency to protect
personnel
C. To replace safety training
D. To record maintenance activities
Answer: B
Rationale: Emergency action plans provide procedures for
evacuation, reporting, and response to protect lives.
Question 8
Which type of respirator is generally required for ammonia
emergency response at concentrations above IDLH?
A. Dust mask
4|Page
