NCCCO Digger Derrick Setup & Operations
Practice Exam Fall 2026| 250 Most Tested
Questions Collection & Verified Detailed
Answers With Rationales| Tutor Verified
Success Exam) Graded A+
Pre-Operation Inspection
1. What should an operator do before beginning a digger derrick
shift?
A. Immediately begin digging
B. Review only the fuel level
C. Perform the required pre-operation inspection
D. Test the maximum load capacity
Rationale: A systematic pre-operation inspection helps identify
defects or unsafe conditions before the machine is placed into
service.
2. Which document should an operator consult for machine-specific
operating limitations?
A. A general construction handbook
B. The manufacturer's operating manual
C. A coworker's notes
D. A generic crane chart
Rationale: Manufacturer instructions contain equipment-specific
limitations, procedures, and warnings.
3. What should be done if a critical safety device is found defective?
A. Operate slowly
B. Continue only with light loads
,C. Have a spotter compensate
D. Remove the equipment from service until properly addressed
Rationale: A defective safety-critical component can create an
unacceptable hazard.
4. During inspection, hydraulic hoses should be checked for:
A. Paint color
B. Leaks, damage, abrasion, and deterioration
C. Manufacturer logos
D. Tire pressure
Rationale: Damaged hydraulic components can fail suddenly and
cause loss of control or injury.
5. Why should hydraulic leaks not be checked with bare hands?
A. Hydraulic fluid is always cold
B. It damages gloves
C. High-pressure fluid can penetrate skin
D. It causes equipment noise
Rationale: Hydraulic injection injuries can occur when high-pressure
fluid penetrates the skin.
6. What is the purpose of inspecting wire rope before operation?
A. To determine fuel consumption
B. To identify damage or conditions that could compromise safe
lifting
C. To calculate engine speed
D. To determine soil density
Rationale: Wire-rope condition directly affects lifting safety.
7. Which condition requires attention during tire inspection?
A. Matching tread patterns
B. Cuts, damage, or improper inflation
C. Clean sidewalls
D. Manufacturer markings
,Rationale: Tire defects or incorrect inflation can affect machine
stability.
8. What should be checked on outriggers before use?
A. Paint thickness
B. Structural condition, hydraulic operation, and proper
deployment
C. Radio volume
D. Cab temperature
Rationale: Outriggers provide important support and must function
correctly.
9. Why should controls be tested before beginning operations?
A. To warm the paint
B. To verify proper and predictable function
C. To increase engine horsepower
D. To reduce fuel level
Rationale: Control testing helps identify malfunctions before lifting or
digging begins.
10. What should an operator do if an inspection reveals a damaged
load-bearing component?
A. Paint it
B. Operate at reduced speed
C. Report it and follow the required out-of-service procedure
D. Increase counterweight
Rationale: Structural damage can compromise the machine and must
be properly evaluated.
11. Why should the operator inspect the boom before operation?
A. To determine fuel consumption
B. To identify cracks, deformation, loose components, or other
damage
, C. To calculate soil pressure
D. To measure wind direction
Rationale: Boom integrity is essential to safe lifting and digging.
12. What is one reason to inspect the sheaves?
A. To check paint color
B. Damaged or improperly functioning sheaves can damage wire
rope and affect reeving
C. To determine tire wear
D. To calculate engine oil level
Rationale: Sheaves guide the rope and must remain in serviceable
condition.
13. What should be checked on the hook assembly?
A. Fuel level
B. Hook condition, latch condition, and related components
C. Tire pressure
D. Engine coolant color
Rationale: The hook assembly must safely retain and support the
load.
14. Why should the operator inspect the load line?
A. To determine soil type
B. To detect wear, broken wires, crushing, corrosion, or other
damage
C. To determine boom angle
D. To check battery voltage
Rationale: Load-line damage can lead to lifting failure.
15. What is the purpose of checking fluid levels during inspection?
A. To improve paint quality
B. To help ensure proper equipment operation and prevent damage
C. To increase load capacity
D. To eliminate the need for maintenance
Practice Exam Fall 2026| 250 Most Tested
Questions Collection & Verified Detailed
Answers With Rationales| Tutor Verified
Success Exam) Graded A+
Pre-Operation Inspection
1. What should an operator do before beginning a digger derrick
shift?
A. Immediately begin digging
B. Review only the fuel level
C. Perform the required pre-operation inspection
D. Test the maximum load capacity
Rationale: A systematic pre-operation inspection helps identify
defects or unsafe conditions before the machine is placed into
service.
2. Which document should an operator consult for machine-specific
operating limitations?
A. A general construction handbook
B. The manufacturer's operating manual
C. A coworker's notes
D. A generic crane chart
Rationale: Manufacturer instructions contain equipment-specific
limitations, procedures, and warnings.
3. What should be done if a critical safety device is found defective?
A. Operate slowly
B. Continue only with light loads
,C. Have a spotter compensate
D. Remove the equipment from service until properly addressed
Rationale: A defective safety-critical component can create an
unacceptable hazard.
4. During inspection, hydraulic hoses should be checked for:
A. Paint color
B. Leaks, damage, abrasion, and deterioration
C. Manufacturer logos
D. Tire pressure
Rationale: Damaged hydraulic components can fail suddenly and
cause loss of control or injury.
5. Why should hydraulic leaks not be checked with bare hands?
A. Hydraulic fluid is always cold
B. It damages gloves
C. High-pressure fluid can penetrate skin
D. It causes equipment noise
Rationale: Hydraulic injection injuries can occur when high-pressure
fluid penetrates the skin.
6. What is the purpose of inspecting wire rope before operation?
A. To determine fuel consumption
B. To identify damage or conditions that could compromise safe
lifting
C. To calculate engine speed
D. To determine soil density
Rationale: Wire-rope condition directly affects lifting safety.
7. Which condition requires attention during tire inspection?
A. Matching tread patterns
B. Cuts, damage, or improper inflation
C. Clean sidewalls
D. Manufacturer markings
,Rationale: Tire defects or incorrect inflation can affect machine
stability.
8. What should be checked on outriggers before use?
A. Paint thickness
B. Structural condition, hydraulic operation, and proper
deployment
C. Radio volume
D. Cab temperature
Rationale: Outriggers provide important support and must function
correctly.
9. Why should controls be tested before beginning operations?
A. To warm the paint
B. To verify proper and predictable function
C. To increase engine horsepower
D. To reduce fuel level
Rationale: Control testing helps identify malfunctions before lifting or
digging begins.
10. What should an operator do if an inspection reveals a damaged
load-bearing component?
A. Paint it
B. Operate at reduced speed
C. Report it and follow the required out-of-service procedure
D. Increase counterweight
Rationale: Structural damage can compromise the machine and must
be properly evaluated.
11. Why should the operator inspect the boom before operation?
A. To determine fuel consumption
B. To identify cracks, deformation, loose components, or other
damage
, C. To calculate soil pressure
D. To measure wind direction
Rationale: Boom integrity is essential to safe lifting and digging.
12. What is one reason to inspect the sheaves?
A. To check paint color
B. Damaged or improperly functioning sheaves can damage wire
rope and affect reeving
C. To determine tire wear
D. To calculate engine oil level
Rationale: Sheaves guide the rope and must remain in serviceable
condition.
13. What should be checked on the hook assembly?
A. Fuel level
B. Hook condition, latch condition, and related components
C. Tire pressure
D. Engine coolant color
Rationale: The hook assembly must safely retain and support the
load.
14. Why should the operator inspect the load line?
A. To determine soil type
B. To detect wear, broken wires, crushing, corrosion, or other
damage
C. To determine boom angle
D. To check battery voltage
Rationale: Load-line damage can lead to lifting failure.
15. What is the purpose of checking fluid levels during inspection?
A. To improve paint quality
B. To help ensure proper equipment operation and prevent damage
C. To increase load capacity
D. To eliminate the need for maintenance
