NCCCO Digger Derrick Operator
Certification Practice Exam Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A Instant
Download Pdf
1. What is the primary purpose of a digger derrick?
A. Lifting only personnel
B. Digging holes and setting poles
C. Transporting materials
D. Welding structures
Answer: B
Rationale: Digger derricks are designed to dig holes and lift/place poles or
similar vertical structures.
2. What document provides load limits for a digger derrick?
A. Operator logbook
B. Manufacturer’s load chart
C. OSHA manual
D. Inspection checklist
Answer: B
Rationale: The load chart specifies safe lifting capacities under various
conditions.
,3. Before operating, what must be checked for stability?
A. Fuel level
B. Tire pressure only
C. Outriggers and ground conditions
D. Paint condition
Answer: C
Rationale: Proper setup of outriggers and stable ground is critical for safe
operation.
4. What is the function of outriggers?
A. Increase speed
B. Stabilize the equipment
C. Reduce fuel use
D. Improve visibility
Answer: B
Rationale: Outriggers widen the base and improve stability during lifting.
5. What should be done if the load chart is missing?
A. Continue with caution
B. Guess the load
C. Do not operate
D. Use another machine’s chart
Answer: C
Rationale: Operating without a load chart is unsafe and not permitted.
6. What is the first step before digging?
A. Start the engine
B. Identify underground utilities
C. Extend the boom
, D. Load materials
Answer: B
Rationale: Locating utilities prevents dangerous strikes.
7. What is the danger of side loading?
A. Improved lifting capacity
B. Equipment instability
C. Faster operation
D. Reduced wear
Answer: B
Rationale: Side loading can cause tipping or structural damage.
8. What does the term “radius” refer to?
A. Height of boom
B. Distance from center of rotation to load
C. Length of auger
D. Width of truck
Answer: B
Rationale: Radius directly affects lifting capacity.
9. Who is responsible for determining load weight?
A. Signal person
B. Operator
C. Supervisor only
D. Manufacturer
Answer: B
Rationale: The operator must ensure loads are within safe limits.
Certification Practice Exam Questions
And Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A Instant
Download Pdf
1. What is the primary purpose of a digger derrick?
A. Lifting only personnel
B. Digging holes and setting poles
C. Transporting materials
D. Welding structures
Answer: B
Rationale: Digger derricks are designed to dig holes and lift/place poles or
similar vertical structures.
2. What document provides load limits for a digger derrick?
A. Operator logbook
B. Manufacturer’s load chart
C. OSHA manual
D. Inspection checklist
Answer: B
Rationale: The load chart specifies safe lifting capacities under various
conditions.
,3. Before operating, what must be checked for stability?
A. Fuel level
B. Tire pressure only
C. Outriggers and ground conditions
D. Paint condition
Answer: C
Rationale: Proper setup of outriggers and stable ground is critical for safe
operation.
4. What is the function of outriggers?
A. Increase speed
B. Stabilize the equipment
C. Reduce fuel use
D. Improve visibility
Answer: B
Rationale: Outriggers widen the base and improve stability during lifting.
5. What should be done if the load chart is missing?
A. Continue with caution
B. Guess the load
C. Do not operate
D. Use another machine’s chart
Answer: C
Rationale: Operating without a load chart is unsafe and not permitted.
6. What is the first step before digging?
A. Start the engine
B. Identify underground utilities
C. Extend the boom
, D. Load materials
Answer: B
Rationale: Locating utilities prevents dangerous strikes.
7. What is the danger of side loading?
A. Improved lifting capacity
B. Equipment instability
C. Faster operation
D. Reduced wear
Answer: B
Rationale: Side loading can cause tipping or structural damage.
8. What does the term “radius” refer to?
A. Height of boom
B. Distance from center of rotation to load
C. Length of auger
D. Width of truck
Answer: B
Rationale: Radius directly affects lifting capacity.
9. Who is responsible for determining load weight?
A. Signal person
B. Operator
C. Supervisor only
D. Manufacturer
Answer: B
Rationale: The operator must ensure loads are within safe limits.
