Advanced Rigging Questions with CORRECT Answers
(Grade A+)
Question 1:
Cribbing is used to
Answer:
Support a load of the ground
Question 2:
When a load is to be pulled up an inclined plane
Answer:
10% must be added to the load weight to determine the required pull capacity
Question 3:
The WLL for a double-wrapped basket hitch is
Answer:
Half that of a double basket hitch
Question 4:
Which of the following is a correct statement regarding cribbing?
Answer:
Softwoods such as pine are generally used for cribbing
Question 5:
The point at which an object is perpendicular to and balanced in relation to the earth's
gravitational pull is known as the
Answer:
Center of gravity
,Question 6:
A mobile crane is stable when its leverage on the load is
Answer:
Greater than the load's leverage on the crane
Question 7:
The gross load that a crane is capable of lifting can be found in the
Answer:
Load chart
Question 8:
What crane movement affects the load's center of gravity in relation to the tipping axis?
Answer:
Raising the boom
Question 9:
At what wind speed is it advisable to stop lifting operations?
Answer:
30 mph
Question 10:
Cribbing is a process in which
Answer:
A load is placed on stacked timbers
Question 11:
When lifting bundles of rebar, the preferred method is to
Answer:
Thread sling eyes in the same direction
, Question 12:
When using cribbing, what affect on the WLL would be achieved by doubling the depth of the
beams?
Answer:
The WLL would quadruple
Question 13:
At 30 degrees to horizontal, a sling with two legs is carrying what percentage of the load in
each leg?
Answer:
100%
Question 14:
When hoisting bundles of bars 30 feet or longer, always use
Answer:
A spreader bar
Question 15:
The closer the angle of the sling to the horizontal, the
Answer:
Greater the tension on the sling
Question 16:
When should an approved lift plan be reapproved?
Answer:
If there is any deviation from the original lift plan
(Grade A+)
Question 1:
Cribbing is used to
Answer:
Support a load of the ground
Question 2:
When a load is to be pulled up an inclined plane
Answer:
10% must be added to the load weight to determine the required pull capacity
Question 3:
The WLL for a double-wrapped basket hitch is
Answer:
Half that of a double basket hitch
Question 4:
Which of the following is a correct statement regarding cribbing?
Answer:
Softwoods such as pine are generally used for cribbing
Question 5:
The point at which an object is perpendicular to and balanced in relation to the earth's
gravitational pull is known as the
Answer:
Center of gravity
,Question 6:
A mobile crane is stable when its leverage on the load is
Answer:
Greater than the load's leverage on the crane
Question 7:
The gross load that a crane is capable of lifting can be found in the
Answer:
Load chart
Question 8:
What crane movement affects the load's center of gravity in relation to the tipping axis?
Answer:
Raising the boom
Question 9:
At what wind speed is it advisable to stop lifting operations?
Answer:
30 mph
Question 10:
Cribbing is a process in which
Answer:
A load is placed on stacked timbers
Question 11:
When lifting bundles of rebar, the preferred method is to
Answer:
Thread sling eyes in the same direction
, Question 12:
When using cribbing, what affect on the WLL would be achieved by doubling the depth of the
beams?
Answer:
The WLL would quadruple
Question 13:
At 30 degrees to horizontal, a sling with two legs is carrying what percentage of the load in
each leg?
Answer:
100%
Question 14:
When hoisting bundles of bars 30 feet or longer, always use
Answer:
A spreader bar
Question 15:
The closer the angle of the sling to the horizontal, the
Answer:
Greater the tension on the sling
Question 16:
When should an approved lift plan be reapproved?
Answer:
If there is any deviation from the original lift plan
