AZ CR-2 Excavating, Grading & Oil Surfacing Practice Exam
– 250 Questions with Answers & Detailed Explanations
(Arizona ROC License Prep)
Introduction
Ace the Arizona CR-2 Excavating, Grading & Oil Surfacing Exam on Your First Try!
Are you preparing for the Arizona Registrar of Contractors (ROC) CR-2 license exam? Feeling
overwhelmed by the breadth of topics—from earthwork calculations and soil compaction to chip seals, tack
coats, OSHA trench safety, and Arizona-specific regulations?
What's Inside:
✅ 250 realistic multiple-choice questions covering all exam sections:
o Planning & Estimating (cut/fill, swell/shrink, quantities)
o Site Work, Excavation & Grading (slopes, compaction, equipment)
o Asphalt & Oil Surfacing (chip seals, emulsions, tack/prime coats)
o Safety, OSHA & Regulations (trenching, competent person, PPE)
o Mathematics, Blueprint Reading & Project Management
Section 1: Planning and Estimating (Questions 1–30)
1. When calculating earthwork volumes using the average end-area
method, what is the formula?
a) (Area1 + Area2) / 2 x Distance
b) (Area1 x Area2) / 2 x Distance
c) (Area1 - Area2) / Distance
d) (Area1 + Area2) x Distance / 2
,Answer: a) (Area1 + Area2) / 2 x Distance
Explanation: The average end-area method averages the two cross-sectional
areas and multiplies by the distance between them to get volume in cubic
units.
2. A site plan indicates a scale of 1 inch = 50 feet. If a property line
measures 4.5 inches on the plan, what is the actual distance?
a) 200 feet
b) 225 feet
c) 250 feet
d) 275 feet
Answer: b) 225 feet
Explanation: 4.5 inches × 50 feet/inch = 225 feet.
3. Which of the following is the most critical factor when calculating
the swell factor of excavated soil?
a) The moisture content of the soil
b) The type of excavation equipment used
,c) The weight of the soil per cubic yard
d) The soil's in-place density vs. loose density
Answer: d) The soil's in-place density vs. loose density
Explanation: Swell factor is the ratio of loose volume to bank (in-place)
volume, so comparing those densities is essential.
4. A contractor needs to import fill material. The compacted fill
requires 1,500 cubic yards (bank measure). If the soil has a shrinkage
factor of 15%, how many loose cubic yards must be hauled to the site?
a) 1,275 cu yd
b) 1,500 cu yd
c) 1,725 cu yd
d) 1,765 cu yd
Answer: d) 1,765 cu yd (approx.)
Explanation: Shrinkage = 15%, so compacted volume = 85% of bank volume.
Loose volume = 1,.85 = 1,764.7 → round to 1,765 cu yd.
5. What does a "cut" volume represent in earthwork takeoff?
a) Soil that must be added to raise the grade
, b) Soil removed to lower the grade to design elevation
c) The volume of soil lost to compaction
d) The volume of rock requiring blasting
Answer: b) Soil removed to lower the grade to design elevation
Explanation: "Cut" means excavating existing material to bring the site down
to the desired subgrade elevation.
6. Which of these is the best method to estimate the quantity of
asphalt oil surfacing required for a parking lot?
a) Measure the area and multiply by the application rate in gallons per
square yard
b) Measure the perimeter and multiply by depth
c) Estimate by truckload count
d) Use the weight of aggregate only
Answer: a) Measure the area and multiply by the application rate in
gallons per square yard
Explanation: Oil surfacing quantities are based on area coverage (SY) times
the specified spray application rate (gal/SY).
– 250 Questions with Answers & Detailed Explanations
(Arizona ROC License Prep)
Introduction
Ace the Arizona CR-2 Excavating, Grading & Oil Surfacing Exam on Your First Try!
Are you preparing for the Arizona Registrar of Contractors (ROC) CR-2 license exam? Feeling
overwhelmed by the breadth of topics—from earthwork calculations and soil compaction to chip seals, tack
coats, OSHA trench safety, and Arizona-specific regulations?
What's Inside:
✅ 250 realistic multiple-choice questions covering all exam sections:
o Planning & Estimating (cut/fill, swell/shrink, quantities)
o Site Work, Excavation & Grading (slopes, compaction, equipment)
o Asphalt & Oil Surfacing (chip seals, emulsions, tack/prime coats)
o Safety, OSHA & Regulations (trenching, competent person, PPE)
o Mathematics, Blueprint Reading & Project Management
Section 1: Planning and Estimating (Questions 1–30)
1. When calculating earthwork volumes using the average end-area
method, what is the formula?
a) (Area1 + Area2) / 2 x Distance
b) (Area1 x Area2) / 2 x Distance
c) (Area1 - Area2) / Distance
d) (Area1 + Area2) x Distance / 2
,Answer: a) (Area1 + Area2) / 2 x Distance
Explanation: The average end-area method averages the two cross-sectional
areas and multiplies by the distance between them to get volume in cubic
units.
2. A site plan indicates a scale of 1 inch = 50 feet. If a property line
measures 4.5 inches on the plan, what is the actual distance?
a) 200 feet
b) 225 feet
c) 250 feet
d) 275 feet
Answer: b) 225 feet
Explanation: 4.5 inches × 50 feet/inch = 225 feet.
3. Which of the following is the most critical factor when calculating
the swell factor of excavated soil?
a) The moisture content of the soil
b) The type of excavation equipment used
,c) The weight of the soil per cubic yard
d) The soil's in-place density vs. loose density
Answer: d) The soil's in-place density vs. loose density
Explanation: Swell factor is the ratio of loose volume to bank (in-place)
volume, so comparing those densities is essential.
4. A contractor needs to import fill material. The compacted fill
requires 1,500 cubic yards (bank measure). If the soil has a shrinkage
factor of 15%, how many loose cubic yards must be hauled to the site?
a) 1,275 cu yd
b) 1,500 cu yd
c) 1,725 cu yd
d) 1,765 cu yd
Answer: d) 1,765 cu yd (approx.)
Explanation: Shrinkage = 15%, so compacted volume = 85% of bank volume.
Loose volume = 1,.85 = 1,764.7 → round to 1,765 cu yd.
5. What does a "cut" volume represent in earthwork takeoff?
a) Soil that must be added to raise the grade
, b) Soil removed to lower the grade to design elevation
c) The volume of soil lost to compaction
d) The volume of rock requiring blasting
Answer: b) Soil removed to lower the grade to design elevation
Explanation: "Cut" means excavating existing material to bring the site down
to the desired subgrade elevation.
6. Which of these is the best method to estimate the quantity of
asphalt oil surfacing required for a parking lot?
a) Measure the area and multiply by the application rate in gallons per
square yard
b) Measure the perimeter and multiply by depth
c) Estimate by truckload count
d) Use the weight of aggregate only
Answer: a) Measure the area and multiply by the application rate in
gallons per square yard
Explanation: Oil surfacing quantities are based on area coverage (SY) times
the specified spray application rate (gal/SY).
