NCCCO LIEBHERR DEDICATED PILE DRIVER LOAD CHART MANUAL
EXAM QUESTIONS AND ANSWERS LATEST UPDATE
1. What is the primary purpose of a load chart on a Liebherr dedicated pile driver?
ANSWER: To provide the operator with the rated capacities and operating limitations for various
configurations, ensuring lifts are performed within safe structural and stability limits.
2. Where must the operator ensure the official, up-to-date load chart is located?
ANSWER: In the operator's cab, at the control station.
3. The information contained in the load chart is based on the machine being positioned on a
firm, level surface that is capable of supporting the imposed loads.
ANSWER: True
4. What does the term "Dedicated Pile Driver" imply about the machine's design?
ANSWER: It is specifically designed and configured for pile driving operations, as opposed to a
conventional crane adapted with a pile driving accessory.
5. Before using the load chart, what three machine conditions must be verified?
ANSWER: 1. The machine is level. 2. Outriggers are fully extended and set per manufacturer
specifications. 3. The machine is configured as specified in the load chart notes (e.g.,
counterweight, boom configuration).
6. In a load chart, what does the "Radius" typically refer to?
ANSWER: The horizontal distance from the axis of rotation to the center of the vertical load line
(e.g., the pile hammer/leads).
7. What is the primary effect of increasing the operating radius on the machine's capacity?
ANSWER: The rated capacity decreases as the radius increases.
,8. The "Load Radius" is measured from the center of rotation to the…
ANSWER: ...center of the gravity of the suspended load.
9. The main boom angle is measured between the horizontal plane and the…
ANSWER: ...longitudinal centerline of the boom.
10. A load chart is valid only if the machine is equipped with all components and devices
specified by the…
ANSWER: ...manufacturer.
11. What is the significance of the "FULLY ERECTED" note on a pile driver load chart?
ANSWER: It indicates the machine is set up for work with all outriggers fully extended, the
machine level, and the system in its operational configuration, not for traveling.
12. The load chart values include the weight of all auxiliary equipment, such as the pile hammer,
leads, and hoist lines.
ANSWER: False. The load chart capacities are for the external load only. The weight of all load-
handling devices (hooks, blocks, hammer, leads) must be deducted from the chart's capacity.
13. What is the "Gross Load" that the operator must calculate?
ANSWER: The total weight of the external load plus the weight of all load-handling devices
(rigging, hammer, leads, etc.).
14. If the load chart lists a capacity of 20,000 lbs at a given radius, and the pile hammer and
leads weigh 4,500 lbs, what is the maximum weight of the actual pile you can lift?
ANSWER: 15,500 lbs. (20,000 lbs - 4,500 lbs = 15,500 lbs)
15. The primary structural load-bearing component of a dedicated pile driver is the…
, ANSWER: ...leader or leads.
16. What is the primary function of the pile driver leads?
ANSWER: To guide the pile and the hammer during the driving process, ensuring vertical or
battered alignment.
17. When referring to "battered" piles, what does this describe?
ANSWER: Piles that are driven at an angle, not vertically.
18. The load chart for a pile driver must account for dynamic forces introduced during the pile
driving process.
ANSWER: True. Load charts often have specific notes or reduced capacities to account for the
dynamic forces of hammering.
19. What does the acronym "A2L" stand for in the context of a Liebherr load chart
configuration?
ANSWER: It typically refers to a specific boom and jib configuration, such as "Main Boom with
Luffing Jib." The operator must refer to the specific machine's chart for the exact definition.
20. The "SWL" marked on a load chart stands for…
ANSWER: Safe Working Load.
21. What is the difference between "rated capacity" and "tipping load"?
ANSWER: Rated capacity is the maximum allowable load under which the machine can safely
operate. Tipping load is the load that will cause the machine to begin to overturn, which is
higher than the rated capacity due to the built-in stability factor.
22. The stability factor is a margin of safety between the rated capacity and the load that would
cause the machine to tip.
ANSWER: True.
EXAM QUESTIONS AND ANSWERS LATEST UPDATE
1. What is the primary purpose of a load chart on a Liebherr dedicated pile driver?
ANSWER: To provide the operator with the rated capacities and operating limitations for various
configurations, ensuring lifts are performed within safe structural and stability limits.
2. Where must the operator ensure the official, up-to-date load chart is located?
ANSWER: In the operator's cab, at the control station.
3. The information contained in the load chart is based on the machine being positioned on a
firm, level surface that is capable of supporting the imposed loads.
ANSWER: True
4. What does the term "Dedicated Pile Driver" imply about the machine's design?
ANSWER: It is specifically designed and configured for pile driving operations, as opposed to a
conventional crane adapted with a pile driving accessory.
5. Before using the load chart, what three machine conditions must be verified?
ANSWER: 1. The machine is level. 2. Outriggers are fully extended and set per manufacturer
specifications. 3. The machine is configured as specified in the load chart notes (e.g.,
counterweight, boom configuration).
6. In a load chart, what does the "Radius" typically refer to?
ANSWER: The horizontal distance from the axis of rotation to the center of the vertical load line
(e.g., the pile hammer/leads).
7. What is the primary effect of increasing the operating radius on the machine's capacity?
ANSWER: The rated capacity decreases as the radius increases.
,8. The "Load Radius" is measured from the center of rotation to the…
ANSWER: ...center of the gravity of the suspended load.
9. The main boom angle is measured between the horizontal plane and the…
ANSWER: ...longitudinal centerline of the boom.
10. A load chart is valid only if the machine is equipped with all components and devices
specified by the…
ANSWER: ...manufacturer.
11. What is the significance of the "FULLY ERECTED" note on a pile driver load chart?
ANSWER: It indicates the machine is set up for work with all outriggers fully extended, the
machine level, and the system in its operational configuration, not for traveling.
12. The load chart values include the weight of all auxiliary equipment, such as the pile hammer,
leads, and hoist lines.
ANSWER: False. The load chart capacities are for the external load only. The weight of all load-
handling devices (hooks, blocks, hammer, leads) must be deducted from the chart's capacity.
13. What is the "Gross Load" that the operator must calculate?
ANSWER: The total weight of the external load plus the weight of all load-handling devices
(rigging, hammer, leads, etc.).
14. If the load chart lists a capacity of 20,000 lbs at a given radius, and the pile hammer and
leads weigh 4,500 lbs, what is the maximum weight of the actual pile you can lift?
ANSWER: 15,500 lbs. (20,000 lbs - 4,500 lbs = 15,500 lbs)
15. The primary structural load-bearing component of a dedicated pile driver is the…
, ANSWER: ...leader or leads.
16. What is the primary function of the pile driver leads?
ANSWER: To guide the pile and the hammer during the driving process, ensuring vertical or
battered alignment.
17. When referring to "battered" piles, what does this describe?
ANSWER: Piles that are driven at an angle, not vertically.
18. The load chart for a pile driver must account for dynamic forces introduced during the pile
driving process.
ANSWER: True. Load charts often have specific notes or reduced capacities to account for the
dynamic forces of hammering.
19. What does the acronym "A2L" stand for in the context of a Liebherr load chart
configuration?
ANSWER: It typically refers to a specific boom and jib configuration, such as "Main Boom with
Luffing Jib." The operator must refer to the specific machine's chart for the exact definition.
20. The "SWL" marked on a load chart stands for…
ANSWER: Safe Working Load.
21. What is the difference between "rated capacity" and "tipping load"?
ANSWER: Rated capacity is the maximum allowable load under which the machine can safely
operate. Tipping load is the load that will cause the machine to begin to overturn, which is
higher than the rated capacity due to the built-in stability factor.
22. The stability factor is a margin of safety between the rated capacity and the load that would
cause the machine to tip.
ANSWER: True.
