Arizona (AZ) CR2 Excavating, Grading & Oil Surfacing Practice Exam 200 Practice
Questions with Correct Answers and Rationales Based on Arizona Registrar of
Contractors (ROC) Requirements and Industry Standards
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Question 1
The Arizona CR2 license specifically authorizes the licensee to perform which of the following
types of work?
A. Construction of residential foundations
B. Electrical conduit installation under slabs
C. Excavating, grading, and oil surfacing for projects over $1,000
D. Plumbing and utility line trenching as a primary contractor
Answer: C. Excavating, grading, and oil surfacing for projects over $1,000
Explanation: The CR2 license is defined for contracting work in excavating, grading, and oil
surfacing where the total cost of one or more contracts is $1,000 or more. This license does not
authorize foundation construction, electrical work, or plumbing as primary activities .
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Question 2
The CR2 license is regulated by which agency in Arizona?
A. OSHA
,B. EPA
C. Arizona Registrar of Contractors (ROC)
D. ADOT
Answer: C. Arizona Registrar of Contractors (ROC)
Explanation: The Arizona Registrar of Contractors (ROC) licenses and disciplines contractors in
Arizona. All contractor licenses, including the CR2, are regulated by the ROC to protect the
public by ensuring licensed, competent contractors .
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Question 3
The "Competent Person" on an excavation site is primarily responsible for:
A. Operating the heaviest equipment
B. Classifying soil types and designing protective systems
C. Handling all site payroll
D. Ordering materials
Answer: B. Classifying soil types and designing protective systems
Explanation: A Competent Person is defined by OSHA as someone capable of identifying existing
and predictable hazards in the surroundings, including soil classification, and who has
authorization to take prompt corrective measures. This is a critical safety role on excavation
sites .
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Question 4
The minimum depth at which OSHA requires protection from cave-ins in an excavation is:
A. 3 feet
B. 4 feet
C. 5 feet
D. 6 feet
Answer: C. 5 feet
Explanation: OSHA standard 1926.651 requires that employees in excavations 5 feet or deeper
be protected from cave-ins by a protective system such as sloping, shoring, or shielding.
Excavations less than 5 feet deep may also require protection if the competent person deems it
necessary .
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Question 5
A spoil pile must be placed at least ___ feet back from the edge of an excavation.
A. 1 foot
B. 2 feet
C. 3 feet
D. 4 feet
, Answer: B. 2 feet
Explanation: Spoils must be set back a minimum of 2 feet from the edge of the trench to
prevent material from rolling back in and to reduce the load on the trench walls. This is an OSHA
requirement that helps prevent cave-ins .
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Question 6
When working near energized power lines, the minimum safe distance for equipment operating
up to 50kV is:
A. 5 feet
B. 10 feet
C. 15 feet
D. 20 feet
Answer: B. 10 feet
Explanation: OSHA requires a minimum clearance of 10 feet for equipment operating near
energized power lines up to 50kV to prevent electrocution. Greater distances are required for
higher voltages .
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Question 7
The three basic soil types defined by OSHA are:
Questions with Correct Answers and Rationales Based on Arizona Registrar of
Contractors (ROC) Requirements and Industry Standards
---
Question 1
The Arizona CR2 license specifically authorizes the licensee to perform which of the following
types of work?
A. Construction of residential foundations
B. Electrical conduit installation under slabs
C. Excavating, grading, and oil surfacing for projects over $1,000
D. Plumbing and utility line trenching as a primary contractor
Answer: C. Excavating, grading, and oil surfacing for projects over $1,000
Explanation: The CR2 license is defined for contracting work in excavating, grading, and oil
surfacing where the total cost of one or more contracts is $1,000 or more. This license does not
authorize foundation construction, electrical work, or plumbing as primary activities .
---
Question 2
The CR2 license is regulated by which agency in Arizona?
A. OSHA
,B. EPA
C. Arizona Registrar of Contractors (ROC)
D. ADOT
Answer: C. Arizona Registrar of Contractors (ROC)
Explanation: The Arizona Registrar of Contractors (ROC) licenses and disciplines contractors in
Arizona. All contractor licenses, including the CR2, are regulated by the ROC to protect the
public by ensuring licensed, competent contractors .
---
Question 3
The "Competent Person" on an excavation site is primarily responsible for:
A. Operating the heaviest equipment
B. Classifying soil types and designing protective systems
C. Handling all site payroll
D. Ordering materials
Answer: B. Classifying soil types and designing protective systems
Explanation: A Competent Person is defined by OSHA as someone capable of identifying existing
and predictable hazards in the surroundings, including soil classification, and who has
authorization to take prompt corrective measures. This is a critical safety role on excavation
sites .
,---
Question 4
The minimum depth at which OSHA requires protection from cave-ins in an excavation is:
A. 3 feet
B. 4 feet
C. 5 feet
D. 6 feet
Answer: C. 5 feet
Explanation: OSHA standard 1926.651 requires that employees in excavations 5 feet or deeper
be protected from cave-ins by a protective system such as sloping, shoring, or shielding.
Excavations less than 5 feet deep may also require protection if the competent person deems it
necessary .
---
Question 5
A spoil pile must be placed at least ___ feet back from the edge of an excavation.
A. 1 foot
B. 2 feet
C. 3 feet
D. 4 feet
, Answer: B. 2 feet
Explanation: Spoils must be set back a minimum of 2 feet from the edge of the trench to
prevent material from rolling back in and to reduce the load on the trench walls. This is an OSHA
requirement that helps prevent cave-ins .
---
Question 6
When working near energized power lines, the minimum safe distance for equipment operating
up to 50kV is:
A. 5 feet
B. 10 feet
C. 15 feet
D. 20 feet
Answer: B. 10 feet
Explanation: OSHA requires a minimum clearance of 10 feet for equipment operating near
energized power lines up to 50kV to prevent electrocution. Greater distances are required for
higher voltages .
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Question 7
The three basic soil types defined by OSHA are:
