34 questions from the NCCER Core practice test.
10 questions, graded as you go, with the reason for every answer. No sign-up.
A sling passes under a load and both of its eyes are placed on the hook. What hitch is this?
B. Basket hitch
In a basket hitch the sling cradles the load with both ends on the hook. In a choker hitch one end passes through the other eye and tightens around the load.
Reference: Basic rigging: hitches
How does the rated capacity of a sling in a choker hitch compare with the same sling in a straight vertical hitch?
A. It is lower
The sharp bend where the sling chokes on itself reduces its capacity, typically to about three-quarters to four-fifths of the vertical rating. Double capacity applies to a basket hitch with vertical legs, not to a choker.
Reference: Basic rigging: hitch capacities; sling capacity tables
As the angle between a sling leg and the horizontal gets smaller, what happens to the tension in that leg?
B. It increases
A flatter sling leg must pull harder to supply the same upward lift, so tension rises as the angle from horizontal drops. At 30 degrees each leg of a two-leg hitch carries as much as the whole load.
Reference: Basic rigging: sling angles