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Question 1. Which OSHA regulation primarily governs general industry safety standards? A) 29 CFR 1910 B) 29 CFR 1926 C) ANSI A10. D) ASME B30. Answer: A Explanation: 29 CFR 1910 sets forth OSHA standards for general industry safety, including equipment operation and employee safety requirements. Question 2. Under OSHA regulations, who is responsible for ensuring that equipment is inspected before use? A) The employer only B) The employee only C) The competent person D) The safety officer Answer: C Explanation: OSHA mandates that a competent person be responsible for inspecting equipment to identify hazards before operation. Question 3. What is the primary purpose of ANSI A10.31 standards?
A) To regulate electrical wiring B) To specify safety and operational guidelines for digger derricks C) To establish environmental procedures D) To define PPE requirements Answer: B Explanation: ANSI A10.31 provides safety and operational standards specific to digger derricks, ensuring safe design and use. Question 4. Which of the following is a key feature of the ASME B30.5 standard? A) Electrical safety protocols B) Mobile and locomotive crane safety C) Personal protective equipment D) Soil testing procedures Answer: B Explanation: ASME B30.5 addresses safety standards for mobile and locomotive cranes, including lifting operations relevant to digger derricks. Question 5. When working near energized power lines, what is the minimum approach distance (MAD) for 50 kV lines? A) 10 feet B) 24 feet C) 4 feet
Explanation: Insulated gloves provide protection against electrical shock when working near energized lines, which is critical for electrical safety. Question 8. What is the primary purpose of conducting a Job Safety Analysis (JSA)? A) To train operators B) To identify and control hazards before starting work C) To schedule maintenance D) To document equipment specifications Answer: B Explanation: JSA aims to identify potential hazards associated with a task and implement controls to mitigate risks prior to work. Question 9. Which action is appropriate if electrical contact occurs during operation? A) Continue working until the end of the shift B) Immediately isolate the power source and call emergency services C) Attempt to disconnect the electrical source with a metal tool D) Ignore if no injuries are apparent Answer: B Explanation: Immediate action involves isolating power sources if possible and calling emergency responders to prevent further injury.
Question 10. Which hand signal indicates "lower the load" in crane operations? A) Arm raised vertically B) Arm extended horizontally with palm facing down C) Arm pointing downward with open palm D) Arm moving in a circular motion Answer: C Explanation: The standard signal for lowering a load is an arm pointing downward with an open palm, indicating controlled descent. Question 11. What is the main function of the turret in a digger derrick? A) To provide power to the auger B) To rotate the boom for directional control C) To stabilize the equipment D) To support the hydraulic system Answer: B Explanation: The turret allows the boom to rotate, providing directional control during lifting and digging operations. Question 12. Which component of a digger derrick is responsible for raising and lowering the boom? A) Hydraulic cylinders B) Winch system
Explanation: A high psi reading indicates hydraulic pressure is present, necessary for lifting and digging operations. Question 15. What is the primary purpose of load moment indicators (LMI)? A) To measure hydraulic fluid levels B) To prevent overloading by indicating the load's position relative to the crane's capacity C) To control the speed of the boom D) To monitor engine temperature Answer: B Explanation: LMIs provide real-time data on load position and weight to prevent exceeding safe load limits, enhancing operational safety. Question 16. During daily inspections, what should be checked on the wire rope? A) Color change only B) Number of strands C) Wear, broken wires, kinking, and corrosion D) Length measurement Answer: C Explanation: Inspection for wear, broken wires, kinks, and corrosion helps identify when wire rope is unsafe for use and needs replacement.
Question 17. Why is routine lubrication critical for digger derricks? A) To prevent rust B) To ensure smooth operation and reduce wear of moving parts C) To increase weight D) To cool the hydraulic system Answer: B Explanation: Proper lubrication reduces friction and wear on moving components, extending equipment lifespan and maintaining safety. Question 18. Which troubleshooting step is appropriate if the hydraulic system is not generating enough pressure? A) Check hydraulic fluid level and for leaks B) Replace the engine oil C) Tighten all electrical wiring D) Increase engine speed Answer: A Explanation: Low hydraulic pressure often results from low fluid levels or leaks; inspecting these components helps identify the issue. Question 19. Before setting up a digger derrick, what is an essential site assessment step? A) Checking weather forecast only
D) Ignoring ground conditions Answer: B Explanation: Proper rigging and controlling pole swing are essential to safely set poles to correct depth and prevent accidents. Question 22. What is a critical factor when selecting an auger for a specific soil condition? A) The color of the auger B) The size and type of auger and bit suitable for soil type C) The brand of the auger D) The length of the auger only Answer: B Explanation: The auger type and size must match soil conditions (clay, sand, rocky) for efficient and safe drilling. Question 23. Which is a key consideration for controlling load swing during hoisting? A) Boom angle B) Wind speed C) Proper rigging and slow, controlled movements D) The color of the load Answer: C
Explanation: Rigging properly and moving loads slowly minimizes swing and drift, reducing the risk of accidents. Question 24. When transporting a digger derrick, which practice is correct? A) Leaving outriggers extended B) Securing all equipment and stowing the boom C) Removing safety devices D) Overloading the vehicle for efficiency Answer: B Explanation: Securing all equipment and proper stowage prevent movement during transit, ensuring safety on the road. Question 25. How does inclement weather, such as high winds, impact digger derrick operations? A) It has no impact B) It can increase the risk of tipping and loss of control C) It improves visibility D) It cools the hydraulic system Answer: B Explanation: High winds can destabilize equipment and increase the risk of tipping or swinging loads uncontrollably.
B) Detailed lift plan and pre-lift safety briefing C) Ignoring weather conditions D) Skipping equipment inspection Answer: B Explanation: Critical lifts require detailed planning, communication, and safety measures to prevent accidents. Question 29. When working with multiple machines, what is a key safety practice? A) Operating independently without communication B) Maintaining clear communication and safe distances C) Using different signals for each machine without coordination D) Overloading the equipment Answer: B Explanation: Clear communication and maintaining safe distances prevent collisions and ensure coordinated operation. Question 30. Daily inspection of the outriggers should include checking for: A) Proper color B) Structural damage, leaks, and proper extension C) The presence of birds D) The amount of grease applied
Answer: B Explanation: Inspecting outriggers for damage and proper extension ensures stability and safe operation. Question 31. What is a sign that a wire rope should be removed from service? A) Slight discoloration B) Broken wires and kinking C) New appearance D) Length is slightly shorter Answer: B Explanation: Broken wires, kinks, and severe wear compromise wire rope integrity and necessitate removal. Question 32. Which type of maintenance involves replacing hydraulic filters? A) Emergency maintenance B) Preventative maintenance C) Corrective maintenance D) Cosmetic maintenance Answer: B Explanation: Routine filter replacement is part of preventative maintenance to ensure hydraulic system health.
B) Use of cones, signs, and barriers to prevent unauthorized entry C) Allowing free access D) Only marking the area with spray paint Answer: B Explanation: Proper barricading with cones, signs, and barriers prevents unauthorized access and enhances safety. Question 36. Which is a critical factor in selecting the proper rigging for a load? A) Color of rigging hardware B) Load weight and rigging capacity C) Length of the rigging D) Rigging hardware brand Answer: B Explanation: Rigging capacity must match or exceed the load weight to ensure safe lifting. Question 37. When working near energized overhead lines, what is the recommended minimum approach distance for 35 kV lines? A) 10 feet B) 20 feet C) 4 feet D) 15 feet
Answer: D Explanation: OSHA specifies 15 feet as the minimum approach distance for lines around 35 kV to prevent electrical contact. Question 38. Properly securing a pole for removal involves: A) Using unrigged hooks B) Using appropriate rigging and preventing uncontrolled rotation C) Dropping it from the truck D) Not securing it at all Answer: B Explanation: Proper rigging and controlling rotation prevent accidents during pole removal. Question 39. Which control is used to prevent boom overextension? A) Load chart B) Boom angle indicator C) Leveling indicator D) Limit switch or boom length indicator Answer: D Explanation: Limit switches or boom length indicators prevent overextension by halting movement at set limits.
D) Ear plugs Answer: C Explanation: Insulated gloves and dielectric boots protect against electrical shock during line work. Question 43. What is the primary function of the level indicator on a digger derrick? A) To measure hydraulic pressure B) To ensure the boom is level for safe lifting C) To monitor engine RPM D) To indicate fuel level Answer: B Explanation: The level indicator ensures the boom remains within safe operating angles for stability. Question 44. When performing a pre-operational inspection, what should be checked on the tires? A) Tread depth and pressure B) Color C) Brand only D) Date of manufacture Answer: A
Explanation: Proper tread depth and correct pressure are vital for stability and safe operation. Question 45. Which is an example of a control pattern in a digger derrick? A) Two-lever pattern B) Joysticks controlling boom and winch independently C) Single lever controlling both functions D) Remote control only Answer: B Explanation: Joystick control patterns typically allow independent movement of boom and winch, facilitating precise operation. Question 46. What is the main reason for conducting a daily inspection of the hydraulic hoses? A) To check for proper labeling B) To detect leaks, cracks, or damage C) To measure length D) To verify color Answer: B Explanation: Inspecting hoses for leaks or damage prevents failures that could cause accidents or equipment damage.
