Download CCO Digger Derrick Operator certification program Practice Exam and more Exams Technology in PDF only on Docsity!
Practice Exam
Question 1. Which OSHA standard specifically addresses the safety requirements for digger derricks used in utility construction? A) 29 CFR 1910 Subpart D B) 29 CFR 1926 Subpart N C) 29 CFR 1926 Subpart CC D) 29 CFR 1910 Subpart Z Answer: C Explanation: 29 CFR 1926 Subpart CC directly applies to cranes and derricks in construction, including digger derricks. Question 2. What is the purpose of ASME B30.5 standard in relation to digger derrick operations? A) Electrical safety B) Mobile and locomotive cranes safety C) PPE requirements D) Site excavation procedures Answer: B Explanation: ASME B30.5 provides safety guidelines for mobile and locomotive cranes, which includes digger derricks. Question 3. Who is responsible for designating a “Competent Person” on a digger derrick job site? A) The equipment manufacturer B) The site owner C) The employer D) The operator Answer: C
Practice Exam
Explanation: The employer must designate a Competent Person to oversee site and equipment safety. Question 4. What is the minimum safe approach distance (MSAD) to an energized line of 15kV according to OSHA? A) 1 foot B) 3 feet C) 10 feet D) 20 feet Answer: C Explanation: OSHA requires a minimum of 10 feet for lines up to 50kV, including 15kV. Question 5. Which type of PPE must be worn when operating a digger derrick near live electrical conductors? A) Hard hat B) Rubber insulating gloves C) Safety glasses D) All of the above Answer: D Explanation: All are required PPE when working near energized conductors. Question 6. What is the primary action to take if a digger derrick contacts an energized power line? A) Exit the equipment immediately B) Remain in the cab and call for help C) Attempt to move the equipment D) Pour water on the contact point
Practice Exam
D) Monitors hydraulic pressure Answer: C Explanation: Anti-two-block devices prevent the hook block from hitting the boom tip. Question 10. Which fluid is essential to check before starting digger derrick operations? A) Engine coolant B) Transmission fluid C) Hydraulic fluid D) All of the above Answer: D Explanation: All these fluids must be checked as part of the pre-operational inspection. Question 11. What is the proper way to verify the function of emergency stops before operation? A) Press emergency stop and observe equipment shutdown B) Visually inspect the button C) Ignore for routine tasks D) Ask another operator Answer: A Explanation: Emergency stop must be tested to ensure correct shutdown capability. Question 12. What should you do if the load moment indicator (LMI) displays an overload warning? A) Ignore the warning B) Reduce the load or reposition C) Continue lifting
Practice Exam
D) Disable the LMI Answer: B Explanation: The operator must reduce load or adjust setup to stay within capacity. Question 13. When inspecting wire rope, what indicates it must be replaced? A) One broken strand B) Rust C) Kinking or birdcaging D) Slight wear Answer: C Explanation: Kinking or birdcaging means the wire rope must be replaced. Question 14. What is the recommended action if an operator finds a crack in the boom structure? A) Clean the crack B) Continue operation C) Tag out and report for immediate repair D) Paint over it Answer: C Explanation: Cracks must be addressed before equipment is used. Question 15. Where should lubrication be applied on a digger derrick? A) Only to the boom B) At all manufacturer-specified points C) Nowhere
Practice Exam
D) The type of soil Answer: B Explanation: Quadrant refers to boom orientation (front, rear, sides) relative to the chassis. Question 19. Which factor is most critical for digger derrick stability during lifting? A) Tire pressure B) Outrigger extension and cribbing C) Engine size D) Paint color Answer: B Explanation: Outriggers and proper cribbing ensure machine stability during lifting. Question 20. What should be used to increase outrigger stability on soft ground? A) Concrete blocks B) Cribbing mats or pads C) Sandbags D) Nothing Answer: B Explanation: Cribbing mats distribute outrigger loads and prevent sinking. Question 21. What is the effect of wind on a suspended load? A) No effect B) Can cause load swing and instability C) Improves stability
Practice Exam
D) Reduces operator fatigue Answer: B Explanation: Wind can swing loads, creating instability and hazards. Question 22. What is the proper response if the digger derrick starts tipping during operation? A) Try to balance by moving the boom B) Lower the load and retract the boom C) Jump out D) Accelerate the engine Answer: B Explanation: Safely lower and retract the boom to reduce tipping risk. Question 23. What is side loading, and why is it dangerous for digger derricks? A) Lifting loads vertically B) Applying force perpendicular to boom’s axis, risking damage or tip-over C) Driving on slopes D) Operating in reverse Answer: B Explanation: Side loading can damage the boom and cause tip-overs. Question 24. Which auger type is best for rocky soil conditions? A) Dirt auger B) Rock auger C) Clay auger
Practice Exam
D) Throw onto roadways Answer: B Explanation: Spoil should be managed in a designated area for safety and environmental compliance. Question 28. What is the safest way to lift a utility pole using a digger derrick? A) Secure with appropriate rigging and lift vertically B) Drag along the ground C) Lift with one sling only D) Use bare hands Answer: A Explanation: Rigging and vertical lifting prevent loss of control and injuries. Question 29. How do you ensure a pole is set “plumb”? A) Eyeball it B) Use a spirit level or sighting tool C) Measure by hand D) Ignore Answer: B Explanation: Spirit levels or sighting tools assure vertical alignment. Question 30. What is blind lifting? A) Lifting with eyes closed B) Lifting when the operator cannot see the load or destination C) Lifting at night
Practice Exam
D) Lifting heavy loads Answer: B Explanation: Blind lifting occurs when the operator cannot directly see the load or placement point. Question 31. Which communication method is best for blind lifts? A) Shouting B) Standard hand signals or radio communication C) Flashlights D) Throwing objects Answer: B Explanation: Hand signals or radio ensure clear, safe communication during blind lifts. Question 32. In personnel platform operations, what must be checked before lifting workers? A) Harness and lanyard connections B) Tire pressure C) Boom paint D) Engine size Answer: A Explanation: Harness and lanyard connections prevent worker falls. Question 33. What is the maximum number of people allowed in a personnel platform? A) As many as fit B) Specified by manufacturer and indicated on platform C) Two
Practice Exam
D) Reduce sling length Answer: B Explanation: Spreader bars distribute the load and reduce stress on slings. Question 37. What is the correct hand signal for “Stop” according to ASME/ANSI standards? A) Waving both arms B) One arm extended with palm down, moved horizontally C) Thumb up D) Clapping hands Answer: B Explanation: This motion signals the operator to stop operations. Question 38. Why is it dangerous to follow non-standard hand signals? A) They are more efficient B) They may cause miscommunication and accidents C) They are easier to learn D) They look professional Answer: B Explanation: Non-standard signals can cause confusion and lead to accidents. Question 39. What is the primary purpose of a tagline during lifting? A) Increase load weight B) Control load rotation and movement C) Reduce operator effort
Practice Exam
D) Decorate the load Answer: B Explanation: Taglines allow ground crew to control load orientation without side loading. Question 40. How do you estimate the weight of a utility pole? A) Guess B) Use pole dimensions and material density C) Weigh with a bathroom scale D) Ask a coworker Answer: B Explanation: Calculating weight requires knowing pole size and density. Question 41. What should be done if the pole or load weight exceeds the digger derrick’s rated capacity? A) Proceed with caution B) Reduce the load or use different equipment C) Try anyway D) Ignore the rating Answer: B Explanation: Exceeding rated capacity is unsafe; reduce load or use proper equipment. Question 42. Who is authorized to signal the operator during critical lifts? A) Anyone on site B) The designated signal person
Practice Exam
C) Making the load lighter D) Increasing sling length Answer: B Explanation: Choke hitches are ideal for securing poles and similar shapes. Question 46. Why must manufacturer’s instructions be followed when operating a digger derrick? A) They are optional B) Ensure safe and correct operation C) For legal reasons only D) For appearance Answer: B Explanation: Following instructions ensures safety and compliance. Question 47. What should be recorded in the maintenance log? A) Lunch breaks B) Daily inspections, repairs, scheduled maintenance C) Operator’s mood D) Weather conditions Answer: B Explanation: Maintenance logs track equipment condition and required actions. Question 48. Who is responsible for inspecting the digger derrick each day? A) Site supervisor B) The operator
Practice Exam
C) The manufacturer D) Local authorities Answer: B Explanation: The operator is responsible for daily equipment inspections. Question 49. Which component must be checked for hydraulic leaks? A) Boom B) Hoses and fittings C) Tires D) Auger teeth Answer: B Explanation: Hydraulic hoses and fittings must be checked for leaks before use. Question 50. What should be done if a warning light appears during operation? A) Ignore B) Stop and investigate C) Cover with tape D) Continue working Answer: B Explanation: Operators must stop and investigate warning lights for safety. Question 51. How often should wire rope be lubricated? A) Never B) As specified by manufacturer and based on use
Practice Exam
C) Ignore D) Paint over Answer: B Explanation: Cracked pads must be replaced to maintain stability. Question 55. What is the best method for checking boom extension limits? A) Guessing B) Referring to manufacturer’s load chart C) Asking a coworker D) Watching for warning lights Answer: B Explanation: The manufacturer’s chart details safe extension limits. Question 56. Which standard covers mobile crane hand signals? A) OSHA 29 CFR 1926 B) ASME/ANSI B30. C) EPA guidelines D) NFPA 70E Answer: B Explanation: ASME/ANSI B30.5 specifies mobile crane hand signal standards. Question 57. What is the function of a load moment indicator (LMI)? A) Measures engine speed B) Warns of approaching overload conditions
Practice Exam
C) Detects hydraulic leaks D) Indicates boom color Answer: B Explanation: LMIs warn operators when load moments approach safe limits. Question 58. What should the operator do if a scheduled maintenance task is overdue? A) Ignore B) Notify supervisor and perform maintenance C) Wait until next month D) Continue working Answer: B Explanation: Overdue maintenance must be performed promptly to ensure safety. Question 59. What is the correct procedure for digging in frozen ground? A) Use a standard dirt auger B) Use a rock auger or specialized bit C) Pour hot water D) Do not dig Answer: B Explanation: Rock augers or specialized bits are needed for frozen ground. Question 60. What is the best way to reduce risk of load swing during hoisting? A) Lift quickly B) Use taglines and control lifting speed
