CR2 Excavating, Grading & Oil Surfacing
Practice Exam Questions and Correct
Answers
Question 1
Which of the following OSHA standards applies to excavations and trenching?
a) 29 CFR 1926.1000
b) 29 CFR 1926.651
c) 29 CFR 1926.7000
d) 29 CFR 1910.1200
Correct Answer
b) 29 CFR 1926.651
Question 2
Which of the following is the primary responsibility of an employer under OSHA
regulations?
a) To provide workers with personal protective equipment (PPE)
b) To ensure the work environment is free from recognized hazards
c) To report all workplace injuries to OSHA within 24 hours
d) To monitor workers' health on a monthly basis
Correct Answer
b) To ensure the work environment is free from recognized hazards
Question 3
What is the term used to describe the amount of explosive energy required to break a
given volume of rock?
a) Blast radius
b) Explosive yield
c) Specific charge
d) Fracture zone
Correct Answer
c) Specific charge
Page 1 of 87
,Question 4
What is required when working near overhead power lines according to OSHA?
a) No special precautions are needed unless the power lines are live
b) Workers must maintain a minimum distance from power lines and use proper
c) Workers can operate equipment near power lines without precautions if no one is
directly underneath
d) Workers must only use insulated tools
Correct Answer
b) Workers must maintain a minimum distance from power lines and use proper
insulation
Question 5
What is the main objective of trench excavation in utility installation?
a) To level the surface for construction
b) To provide access for workers
c) To create space for laying utilities
d) To prepare the site for landscaping
Correct Answer
c) To create space for laying utilities
Question 6
What is the primary purpose of using "explosive primers" in blasting?
a) To initiate the detonation of the main explosive charge
b) To reduce the noise produced during detonation
c) To control the blast's fragmentation
d) To delay the detonation process
Correct Answer
a) To initiate the detonation of the main explosive charge
Page 2 of 87
,Question 7
What is the term "blasting overpressure" used to describe?
a) The total explosive energy released by a blast
b) The shockwave produced by the blast
c) The vibration caused by the blast
d) The amount of fly rock generated during the blast
Correct Answer
The shockwave produced by the blast
Question 8
What is "vibration monitoring" used for in blasting operations?
a) To measure the effectiveness of the explosives
b) To control the size of the blast
c) To minimize environmental impact by monitoring ground vibrations
d) To determine the type of rock being blasted
Correct Answer
c) To minimize environmental impact by monitoring ground vibrations
Question 9
What is a critical aspect of fall protection when working on scaffolding? a) Workers
should wear harnesses only when they are at the top of the scaffold
b) Workers should be tied off with a fall arrest system whenever working at heights
greater than 10 feet
c) Fall protection is only needed during the setup phase of scaffolding d) Scaffolds do
not require fall protection if the scaffold is below 10 feet in height
Correct Answer
b) Workers should be tied off with a fall arrest system whenever working at heights
greater than 10 feet
Page 3 of 87
, Question 10
Which of the following is typically a key objective in the compaction of the road
subgrade?
a) To achieve uniform particle size
b) To improve drainage capacity
c) To increase the load-bearing capacity
d) To ensure the soil is easy to work with
Correct Answer
c) To increase the load-bearing capacity
Question 11
Which of the following materials is commonly used for subbase preparation in
grading operations?
a) Sand
b) Clay
c) Crushed stone
d) Topsoil
Correct Answer
c) Crushed stone
Question 12
What is the purpose of grading in excavation work?
a) To remove excess water
b) To level or shape the ground surface
c) To improve soil fertility
d) To add decorative features
Correct Answer
b) To level or shape the ground surface
Page 4 of 87
Practice Exam Questions and Correct
Answers
Question 1
Which of the following OSHA standards applies to excavations and trenching?
a) 29 CFR 1926.1000
b) 29 CFR 1926.651
c) 29 CFR 1926.7000
d) 29 CFR 1910.1200
Correct Answer
b) 29 CFR 1926.651
Question 2
Which of the following is the primary responsibility of an employer under OSHA
regulations?
a) To provide workers with personal protective equipment (PPE)
b) To ensure the work environment is free from recognized hazards
c) To report all workplace injuries to OSHA within 24 hours
d) To monitor workers' health on a monthly basis
Correct Answer
b) To ensure the work environment is free from recognized hazards
Question 3
What is the term used to describe the amount of explosive energy required to break a
given volume of rock?
a) Blast radius
b) Explosive yield
c) Specific charge
d) Fracture zone
Correct Answer
c) Specific charge
Page 1 of 87
,Question 4
What is required when working near overhead power lines according to OSHA?
a) No special precautions are needed unless the power lines are live
b) Workers must maintain a minimum distance from power lines and use proper
c) Workers can operate equipment near power lines without precautions if no one is
directly underneath
d) Workers must only use insulated tools
Correct Answer
b) Workers must maintain a minimum distance from power lines and use proper
insulation
Question 5
What is the main objective of trench excavation in utility installation?
a) To level the surface for construction
b) To provide access for workers
c) To create space for laying utilities
d) To prepare the site for landscaping
Correct Answer
c) To create space for laying utilities
Question 6
What is the primary purpose of using "explosive primers" in blasting?
a) To initiate the detonation of the main explosive charge
b) To reduce the noise produced during detonation
c) To control the blast's fragmentation
d) To delay the detonation process
Correct Answer
a) To initiate the detonation of the main explosive charge
Page 2 of 87
,Question 7
What is the term "blasting overpressure" used to describe?
a) The total explosive energy released by a blast
b) The shockwave produced by the blast
c) The vibration caused by the blast
d) The amount of fly rock generated during the blast
Correct Answer
The shockwave produced by the blast
Question 8
What is "vibration monitoring" used for in blasting operations?
a) To measure the effectiveness of the explosives
b) To control the size of the blast
c) To minimize environmental impact by monitoring ground vibrations
d) To determine the type of rock being blasted
Correct Answer
c) To minimize environmental impact by monitoring ground vibrations
Question 9
What is a critical aspect of fall protection when working on scaffolding? a) Workers
should wear harnesses only when they are at the top of the scaffold
b) Workers should be tied off with a fall arrest system whenever working at heights
greater than 10 feet
c) Fall protection is only needed during the setup phase of scaffolding d) Scaffolds do
not require fall protection if the scaffold is below 10 feet in height
Correct Answer
b) Workers should be tied off with a fall arrest system whenever working at heights
greater than 10 feet
Page 3 of 87
, Question 10
Which of the following is typically a key objective in the compaction of the road
subgrade?
a) To achieve uniform particle size
b) To improve drainage capacity
c) To increase the load-bearing capacity
d) To ensure the soil is easy to work with
Correct Answer
c) To increase the load-bearing capacity
Question 11
Which of the following materials is commonly used for subbase preparation in
grading operations?
a) Sand
b) Clay
c) Crushed stone
d) Topsoil
Correct Answer
c) Crushed stone
Question 12
What is the purpose of grading in excavation work?
a) To remove excess water
b) To level or shape the ground surface
c) To improve soil fertility
d) To add decorative features
Correct Answer
b) To level or shape the ground surface
Page 4 of 87
