NLC RIGGING EXAM COMPLETE QUESTIONS AND 100%
VERIFIED ANSWERS (LATEST VERSION)
1. Q: What is rigging? ANSWER Rigging is the process of lifting and
moving heavy loads using equipment such as ropes, chains, slings, and
hoists in a safe and controlled manner.
2. Q: What does NLC stand for in the rigging context? ANSWER: NLC
typically refers to National Learning Corporation or specific rigging
certification standards, depending on the context.
3. Q: What is the Working Load Limit (WLL)? ANSWER WLL is the
maximum load that a piece of rigging equipment is designed to handle
under normal working conditions.
4. Q: What is the difference between WLL and breaking strength?
ANSWER: Breaking strength is the load at which equipment fails, while
WLL is typically 1/5 to 1/6 of the breaking strength, providing a safety
margin.
5. Q: What is a safety factor? ANSWER: A safety factor is the ratio
between the breaking strength and the working load limit of rigging
equipment.
6. Q: What are the three main types of slings? ANSWER Wire rope
slings, chain slings, and synthetic slings (nylon, polyester).
7. Q: What is the centre of gravity? ANSWER The centre of gravity is
the point at which the weight of an object is evenly distributed in all
directions.
8. Q: Why is knowing the center of gravity important in rigging?
ANSWER It ensures balanced lifting, prevents tipping or swinging, and
maintains load control during the lift.
9. Q: What is a tag line? ANSWER A tag line is a rope used to control
the rotation or swing of a suspended load.
10.Q: What does SWL stand for? ANSWER Safe Working Load - the
maximum weight that equipment can safely handle.
11.Q: What is a choker hitch? ANSWER A rigging configuration where
the sling wraps around the load and through itself, creating a self-
tightening grip.
12.Q: What is a basket hitch? ANSWER A sling configuration where the
sling passes under the load with both ends attached to the hook, doubling
the capacity.
13.Q: What is a vertical hitch? ANSWER A straight lift where the sling
runs vertically from the load to the hook.
,14.Q: What angle reduces sling capacity the most? ANSWER Angles
less than 30 degrees from horizontal significantly reduce sling capacity
and increase stress.
15.Q: What is the D/d ratio? ANSWER The ratio between the diameter of
the bend (D) and the diameter of the wire rope or sling (d).
16.Q: What is a shackle? ANSWER A U-shaped metal connector with a
pin or bolt across the opening, used to connect rigging components.
17.Q: What are the two main types of shackles? ANSWER Anchor
(bow) shackles and chain shackles (D-shackles).
18.Q: What is a lifting lug? ANSWER A projection or attachment point
on equipment designed specifically for lifting.
19.Q: What is dynamic loading? ANSWER Additional stress placed on
rigging equipment due to sudden movements, jerking, or swinging loads.
20.Q: What is static loading? ANSWER The constant load weight
without additional forces from movement or acceleration.
21.Q: What is a bridle sling? ANSWER A rigging arrangement using
multiple sling legs connected to a single lifting point.
22.Q: What is load angle? ANSWER The angle between the sling leg and
the horizontal plane of the load.
23.Q: At what sling angle is capacity reduced to approximately 50%?
ANSWER At 60 degrees from vertical (30 degrees from horizontal).
24.Q: What is an equalizer beam? ANSWER A spreader bar that
distributes load evenly across multiple lifting points.
25.Q: What is shock loading? ANSWER A sudden application of force
that can exceed the rated capacity of rigging equipment.
26.Q: What is abrasion in rigging? ANSWER Wear caused by friction
between the rigging equipment and the load or other surfaces.
27.Q: What are softeners or padding used for? ANSWER To protect
slings from sharp edges and prevent damage to both the sling and load.
28.Q: What is a crane hook? ANSWER The attachment point at the end
of a crane line designed to hold rigging equipment and loads.
29.Q: What is a hook latch? ANSWER A safety device that prevents
slings from accidentally slipping off the hook.
30.Q: What is side loading? ANSWER Applying force perpendicular to
the intended load direction, which can damage equipment.
31.Q: What is load drift? ANSWER Unwanted horizontal movement of a
suspended load.
32.Q: What is a hitch? ANSWER The configuration or method used to
attach a sling to a load.
33.Q: What is mechanical advantage? ANSWER The amplification of
force achieved through the use of pulleys or other mechanical systems.
34.Q: What is a come-along? ANSWER A hand-operated pulling device
using ratcheting action and wire rope or chain.
, 35.Q: What are hand signals in rigging? ANSWER Standardized
gestures used to communicate between rigger and crane operator.
36.Q: What is a qualified rigger? ANSWER A person who has
demonstrated knowledge and ability in rigging operations through
training and evaluation.
37.Q: What is a competent person in rigging? ANSWER Someone
capable of identifying hazards and having authority to take corrective
action.
38.Q: What is OSHA? ANSWER Occupational Safety and Health
Administration - the federal agency that sets workplace safety standards.
39.Q: What is ASME? ANSWER American Society of Mechanical
Engineers - develops rigging and lifting standards.
40.Q: What does PPE stand for? ANSWER Personal Protective
Equipment - gear worn to minimize exposure to hazards.
41.Q: What PPE is typically required for rigging work? ANSWER
Hard hat, safety glasses, steel-toed boots, gloves, and high-visibility vest.
42.Q: What is a pre-lift meeting? ANSWER A safety briefing conducted
before complex lifts to discuss procedures, hazards, and roles.
43.Q: What is a critical lift? ANSWER A lift that requires special
planning due to weight, complexity, or proximity to hazards.
44.Q: What is a lift plan? ANSWER A documented procedure outlining
all aspects of a lifting operation including equipment, procedures, and
safety measures.
45.Q: What is load radius? ANSWER The horizontal distance from the
crane's center of rotation to the center of the load.
46.Q: What is boom deflection? ANSWER The downward bending of a
crane boom under load.
47.Q: What is outrigger setup? ANSWER The process of extending and
positioning crane stabilizers to increase stability.
48.Q: What is ground bearing pressure? ANSWER The force exerted by
crane outriggers or tracks on the supporting surface.
49.Q: What are cribbing and mats used for? ANSWER To distribute
crane load over soft ground and prevent sinking or tipping.
50.Q: What is the load chart? ANSWER A document showing a crane's
lifting capacity at various boom lengths and angles.
Section 2: Wire Rope and Slings (51-100)
51.Q: What is wire rope construction? ANSWER The arrangement of
wires into strands and strands around a core.
52.Q: What is the most common wire rope construction? ANSWER
6x19 (6 strands with 19 wires per strand) for general purpose use.
VERIFIED ANSWERS (LATEST VERSION)
1. Q: What is rigging? ANSWER Rigging is the process of lifting and
moving heavy loads using equipment such as ropes, chains, slings, and
hoists in a safe and controlled manner.
2. Q: What does NLC stand for in the rigging context? ANSWER: NLC
typically refers to National Learning Corporation or specific rigging
certification standards, depending on the context.
3. Q: What is the Working Load Limit (WLL)? ANSWER WLL is the
maximum load that a piece of rigging equipment is designed to handle
under normal working conditions.
4. Q: What is the difference between WLL and breaking strength?
ANSWER: Breaking strength is the load at which equipment fails, while
WLL is typically 1/5 to 1/6 of the breaking strength, providing a safety
margin.
5. Q: What is a safety factor? ANSWER: A safety factor is the ratio
between the breaking strength and the working load limit of rigging
equipment.
6. Q: What are the three main types of slings? ANSWER Wire rope
slings, chain slings, and synthetic slings (nylon, polyester).
7. Q: What is the centre of gravity? ANSWER The centre of gravity is
the point at which the weight of an object is evenly distributed in all
directions.
8. Q: Why is knowing the center of gravity important in rigging?
ANSWER It ensures balanced lifting, prevents tipping or swinging, and
maintains load control during the lift.
9. Q: What is a tag line? ANSWER A tag line is a rope used to control
the rotation or swing of a suspended load.
10.Q: What does SWL stand for? ANSWER Safe Working Load - the
maximum weight that equipment can safely handle.
11.Q: What is a choker hitch? ANSWER A rigging configuration where
the sling wraps around the load and through itself, creating a self-
tightening grip.
12.Q: What is a basket hitch? ANSWER A sling configuration where the
sling passes under the load with both ends attached to the hook, doubling
the capacity.
13.Q: What is a vertical hitch? ANSWER A straight lift where the sling
runs vertically from the load to the hook.
,14.Q: What angle reduces sling capacity the most? ANSWER Angles
less than 30 degrees from horizontal significantly reduce sling capacity
and increase stress.
15.Q: What is the D/d ratio? ANSWER The ratio between the diameter of
the bend (D) and the diameter of the wire rope or sling (d).
16.Q: What is a shackle? ANSWER A U-shaped metal connector with a
pin or bolt across the opening, used to connect rigging components.
17.Q: What are the two main types of shackles? ANSWER Anchor
(bow) shackles and chain shackles (D-shackles).
18.Q: What is a lifting lug? ANSWER A projection or attachment point
on equipment designed specifically for lifting.
19.Q: What is dynamic loading? ANSWER Additional stress placed on
rigging equipment due to sudden movements, jerking, or swinging loads.
20.Q: What is static loading? ANSWER The constant load weight
without additional forces from movement or acceleration.
21.Q: What is a bridle sling? ANSWER A rigging arrangement using
multiple sling legs connected to a single lifting point.
22.Q: What is load angle? ANSWER The angle between the sling leg and
the horizontal plane of the load.
23.Q: At what sling angle is capacity reduced to approximately 50%?
ANSWER At 60 degrees from vertical (30 degrees from horizontal).
24.Q: What is an equalizer beam? ANSWER A spreader bar that
distributes load evenly across multiple lifting points.
25.Q: What is shock loading? ANSWER A sudden application of force
that can exceed the rated capacity of rigging equipment.
26.Q: What is abrasion in rigging? ANSWER Wear caused by friction
between the rigging equipment and the load or other surfaces.
27.Q: What are softeners or padding used for? ANSWER To protect
slings from sharp edges and prevent damage to both the sling and load.
28.Q: What is a crane hook? ANSWER The attachment point at the end
of a crane line designed to hold rigging equipment and loads.
29.Q: What is a hook latch? ANSWER A safety device that prevents
slings from accidentally slipping off the hook.
30.Q: What is side loading? ANSWER Applying force perpendicular to
the intended load direction, which can damage equipment.
31.Q: What is load drift? ANSWER Unwanted horizontal movement of a
suspended load.
32.Q: What is a hitch? ANSWER The configuration or method used to
attach a sling to a load.
33.Q: What is mechanical advantage? ANSWER The amplification of
force achieved through the use of pulleys or other mechanical systems.
34.Q: What is a come-along? ANSWER A hand-operated pulling device
using ratcheting action and wire rope or chain.
, 35.Q: What are hand signals in rigging? ANSWER Standardized
gestures used to communicate between rigger and crane operator.
36.Q: What is a qualified rigger? ANSWER A person who has
demonstrated knowledge and ability in rigging operations through
training and evaluation.
37.Q: What is a competent person in rigging? ANSWER Someone
capable of identifying hazards and having authority to take corrective
action.
38.Q: What is OSHA? ANSWER Occupational Safety and Health
Administration - the federal agency that sets workplace safety standards.
39.Q: What is ASME? ANSWER American Society of Mechanical
Engineers - develops rigging and lifting standards.
40.Q: What does PPE stand for? ANSWER Personal Protective
Equipment - gear worn to minimize exposure to hazards.
41.Q: What PPE is typically required for rigging work? ANSWER
Hard hat, safety glasses, steel-toed boots, gloves, and high-visibility vest.
42.Q: What is a pre-lift meeting? ANSWER A safety briefing conducted
before complex lifts to discuss procedures, hazards, and roles.
43.Q: What is a critical lift? ANSWER A lift that requires special
planning due to weight, complexity, or proximity to hazards.
44.Q: What is a lift plan? ANSWER A documented procedure outlining
all aspects of a lifting operation including equipment, procedures, and
safety measures.
45.Q: What is load radius? ANSWER The horizontal distance from the
crane's center of rotation to the center of the load.
46.Q: What is boom deflection? ANSWER The downward bending of a
crane boom under load.
47.Q: What is outrigger setup? ANSWER The process of extending and
positioning crane stabilizers to increase stability.
48.Q: What is ground bearing pressure? ANSWER The force exerted by
crane outriggers or tracks on the supporting surface.
49.Q: What are cribbing and mats used for? ANSWER To distribute
crane load over soft ground and prevent sinking or tipping.
50.Q: What is the load chart? ANSWER A document showing a crane's
lifting capacity at various boom lengths and angles.
Section 2: Wire Rope and Slings (51-100)
51.Q: What is wire rope construction? ANSWER The arrangement of
wires into strands and strands around a core.
52.Q: What is the most common wire rope construction? ANSWER
6x19 (6 strands with 19 wires per strand) for general purpose use.
