- Why is it important for draglines used in severe conditions to undergo more regular thorough examinations?
- A) To meet regulatory standards
- B) To reduce costs associated with maintenance
- C) To maintain resale value
- D) To ensure continued operational safety and reliability
**Correct Answer: D) To ensure continued operational safety and reliability**
- What potential consequence might arise from a large volume of quickly draining water from the dragline’s bucket?
- A) Enhanced stability in operation
- B) Potential water contamination
- C) Reduced sediment or material loss
- D) Material loss from the bucket
**Correct Answer: D) Material loss from the bucket**
- What is the primary concern regarding excessive throw beyond the vertical position in excavating operations?
- A) Improved stability during loading
- B) Risk of overloading the bucket
- C) Reduction in wear and tear on the machine
- D) Inefficiency in bucket loading
**Correct Answer: D) Inefficiency in bucket loading**
- What potential consequence might occur if the bucket encounters substantial resistance during dredging in the side-on position?
- A) Improved digging efficiency
- B) Decreased wear and tear on the bucket
- C) Risk of the dragline being pulled towards the bucket and over the edge
- D) Enhanced stability in operation
**Correct Answer: C) Risk of the dragline being pulled towards the bucket and over the edge**
- What purpose does maintaining a safe distance from power lines serve in the context of the dragline’s operation?
- A) To prevent interference with data signals
- B) To reduce potential environmental hazards
- C) To ensure uninterrupted power supply
- D) To minimize the risk of electric discharge or arcing
**Correct Answer: D) To minimize the risk of electric discharge or arcing**
- What condition or requirement enables operators to conduct the more detailed weekly checks?
- A) Specific authorization from the manufacturer
- B) Completion of a basic certification course
- C) Regular equipment usage for over a year
- D) Additional training for the checks required for that model of dragline
**Correct Answer: D) Additional training for the checks required for that model of dragline**
- What can cause additional stress on the hoist rope during excavation?
- A) Optimal operational conditions
- B) Side-to-side movement of the bucket
- C) Effective digging techniques
- D) Excessive throw beyond the vertical position
**Correct Answer: D) Excessive throw beyond the vertical position**
- What is the effect of slewing rapidly with a loaded bucket?
- A) Improved stability on the boom
- B) Reduced stress on the hoist rope
- C) Higher levels of side stress on the boom
- D) Enhanced operational speed
**Correct Answer: C) Higher levels of side stress on the boom**
- Why is it crucial to check ground conditions in relation to the bearing pressure applied through each track in a dragline operation?
- A) To improve the dragline’s speed
- B) To reduce the risk of bearing damage
- C) To prevent the machine’s sinking or exceeding track width
- D) To ensure a smoother ride for the operator
**Correct Answer: C) To prevent the machine’s sinking or exceeding track width**
- What factor influences the variation in bearing pressure on each part of the tracks in a dragline operation?
- A) Operator’s experience level
- B) Configuration of the dragline
- C) Soil moisture content
- D) Color of the machine’s exterior
**Correct Answer: B) Configuration of the dragline**
- What potential impact does a forward tilt while operating near the bank have on a dragline’s stability?
- A) Improved stability
- B) Increased operational radius
- C) Potential further instability
- D) Enhanced digging efficiency
**Correct Answer: C) Potential further instability**
- What happens to a dragline’s center of gravity while traveling across a slope?
- A) It remains constant
- B) It shifts towards the uphill side
- C) It moves towards the downhill side
- D) It varies randomly
**Correct Answer: C) It moves towards the downhill side**
- What is the primary concern associated with gusts of wind, even if the overall wind speeds remain within the machine’s specified limit?
- A) Increased noise levels at the work site
- B) Reduced visibility for the operator
- C) Potential impact on adjacent structures
- D) Handling challenges for the boom and/or dragline bucket
**Correct Answer: D) Handling challenges for the boom and/or dragline bucket**
- What is the particular concern regarding the dragline’s movement when dredging side-on to the tracks along the bank?
- A) Increased stability in operation
- B) Potential damage to the surrounding area
- C) Minimal risk of imbalance
- D) The risk of the machine being pulled towards the bucket and over the edge
**Correct Answer: D) The risk of the machine being pulled towards the bucket and over the edge**
- Why is it important for the operator to consider changes in ground conditions during dragline operations?
- A) To accelerate the excavation process
- B) To reduce fuel consumption
- C) To prevent potential instability and maintain machine safety
- D) To enhance the machine’s maneuverability
**Correct Answer: C) To prevent potential instability and maintain machine safety**