ARIZONA (AZ) CR2 EXCAVATING, GRADING & OIL SURFACING
150 Practice Questions and Correct Answers – Updated
2025/2026
QUESTION 1
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 – 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 .
---
QUESTION 2
,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 – OSHA standard 1926.651 requires that employees
in excavations 5 feet or deeper be protected from cave-ins by a
protective system (sloping, shoring, or shielding) .
---
QUESTION 3
A spoil pile must be placed at least how many feet back from
the edge of an excavation?
A. 1 foot
B. 2 feet
C. 3 feet
D. 4 feet
,ANSWER: B – 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 .
---
QUESTION 4
Which of the following is NOT a required component of a site-
specific safety plan?
A. Location of the nearest hospital
B. Procedures for equipment maintenance
C. A detailed soil classification report
D. A map of local restaurants
ANSWER: D – While worker safety and breaks are important, a
map of local restaurants is not a required safety component.
The plan must focus on hazard identification, emergency
procedures, and safe work practices .
---
, QUESTION 5
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 – OSHA requires a minimum clearance of 10 feet for
equipment operating near energized power lines up to 50kV to
prevent electrocution .
---
QUESTION 6
The three basic soil types defined by OSHA are:
A. Sand, Gravel, and Clay
B. Stable Rock, Type A, and Type B
C. Type 1, Type 2, and Type 3
150 Practice Questions and Correct Answers – Updated
2025/2026
QUESTION 1
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 – 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 .
---
QUESTION 2
,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 – OSHA standard 1926.651 requires that employees
in excavations 5 feet or deeper be protected from cave-ins by a
protective system (sloping, shoring, or shielding) .
---
QUESTION 3
A spoil pile must be placed at least how many feet back from
the edge of an excavation?
A. 1 foot
B. 2 feet
C. 3 feet
D. 4 feet
,ANSWER: B – 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 .
---
QUESTION 4
Which of the following is NOT a required component of a site-
specific safety plan?
A. Location of the nearest hospital
B. Procedures for equipment maintenance
C. A detailed soil classification report
D. A map of local restaurants
ANSWER: D – While worker safety and breaks are important, a
map of local restaurants is not a required safety component.
The plan must focus on hazard identification, emergency
procedures, and safe work practices .
---
, QUESTION 5
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 – OSHA requires a minimum clearance of 10 feet for
equipment operating near energized power lines up to 50kV to
prevent electrocution .
---
QUESTION 6
The three basic soil types defined by OSHA are:
A. Sand, Gravel, and Clay
B. Stable Rock, Type A, and Type B
C. Type 1, Type 2, and Type 3
