ARIZONA UNDERGROUND STORAGE TANK (UST) OPERATOR EXAM
(CLASS C) Complete 200-Question Practice Test with Correct Answers
& Detailed Rationales Based on ADEQ Rules (Arizona Administrative
Code Title 18, Chapter 12), 40 CFR Part 280, ARS § 49-1083, and 2026
Updates
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SECTION 1: CLASS C OPERATOR ROLE & RESPONSIBILITIES (Questions 1-
25)
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Question 1
According to ARS § 49-1083, a Class C operator must receive training
before assuming their role.
A) Within 30 days of hire
B) Within 60 days of hire
C) Before assuming the role
D) At the annual safety meeting
Answer: C
,Rationale: According to Arizona Revised Statutes § 49-1083(C), "an
owner or operator must designate one or more class C individuals who
must be trained pursuant to subsections E and F of this section before
assuming the role of a class C individual" . This means training must be
completed prior to performing any Class C duties.
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Question 2
A Class C operator's primary responsibility is to:
A) Conduct monthly inspections of all UST equipment
B) Respond to alarms, spills, and emergencies
C) Maintain financial responsibility records
D) Oversee tank installation and closure
Answer: B
Rationale: Class C operators are front-line employees who work directly
at the fueling location . According to ARS § 49-1083(F)(3), their primary
duty involves "initial response procedures to an alarm or other
indication of an emergency caused by a release or suspected release
,from an underground storage tank" . They are trained to recognize
alarms, respond to fuel spills or fires, and notify supervisors or
emergency responders .
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Question 3
In an emergency, the Class C operator's FIRST priority is to:
A) Shut off the power to the dispensers
B) Save all the gasoline in the underground tanks
C) Save all the people present at the facility
D) Call the facility manager
Answer: C
Rationale: The protection of human life is always the top priority in any
emergency situation. While protecting the environment and property
are important, the immediate safety of customers, employees, and
bystanders takes precedence .
---
, Question 4
According to ARS § 49-1083, for an attended facility, a Class C operator
must be:
A) Available by phone at all times
B) On site during the usual and customary hours of operation
C) Present only during fuel deliveries
D) On call 24 hours a day, 7 days a week
Answer: B
Rationale: ARS § 49-1083(C) states that "for an attended facility, a class
C individual must be on site during the usual and customary hours of
operation" . This ensures that trained personnel are physically present
to respond to emergencies during business hours.
---
Question 5
Before taking over your duties as a Class C operator, you must talk with
your supervisor to:
(CLASS C) Complete 200-Question Practice Test with Correct Answers
& Detailed Rationales Based on ADEQ Rules (Arizona Administrative
Code Title 18, Chapter 12), 40 CFR Part 280, ARS § 49-1083, and 2026
Updates
---
SECTION 1: CLASS C OPERATOR ROLE & RESPONSIBILITIES (Questions 1-
25)
---
Question 1
According to ARS § 49-1083, a Class C operator must receive training
before assuming their role.
A) Within 30 days of hire
B) Within 60 days of hire
C) Before assuming the role
D) At the annual safety meeting
Answer: C
,Rationale: According to Arizona Revised Statutes § 49-1083(C), "an
owner or operator must designate one or more class C individuals who
must be trained pursuant to subsections E and F of this section before
assuming the role of a class C individual" . This means training must be
completed prior to performing any Class C duties.
---
Question 2
A Class C operator's primary responsibility is to:
A) Conduct monthly inspections of all UST equipment
B) Respond to alarms, spills, and emergencies
C) Maintain financial responsibility records
D) Oversee tank installation and closure
Answer: B
Rationale: Class C operators are front-line employees who work directly
at the fueling location . According to ARS § 49-1083(F)(3), their primary
duty involves "initial response procedures to an alarm or other
indication of an emergency caused by a release or suspected release
,from an underground storage tank" . They are trained to recognize
alarms, respond to fuel spills or fires, and notify supervisors or
emergency responders .
---
Question 3
In an emergency, the Class C operator's FIRST priority is to:
A) Shut off the power to the dispensers
B) Save all the gasoline in the underground tanks
C) Save all the people present at the facility
D) Call the facility manager
Answer: C
Rationale: The protection of human life is always the top priority in any
emergency situation. While protecting the environment and property
are important, the immediate safety of customers, employees, and
bystanders takes precedence .
---
, Question 4
According to ARS § 49-1083, for an attended facility, a Class C operator
must be:
A) Available by phone at all times
B) On site during the usual and customary hours of operation
C) Present only during fuel deliveries
D) On call 24 hours a day, 7 days a week
Answer: B
Rationale: ARS § 49-1083(C) states that "for an attended facility, a class
C individual must be on site during the usual and customary hours of
operation" . This ensures that trained personnel are physically present
to respond to emergencies during business hours.
---
Question 5
Before taking over your duties as a Class C operator, you must talk with
your supervisor to:
