NCCCO Rigger 1 Study Questions and
Answers7
1. A wire rope that is a 6x19 classification could have how many wires per strand? - ANSWERS-
15 through 26 wires per strand
2. How often should a synthetic web sling be inspected? - ANSWERS-Each day before use
3. Which considerations should be given to suspend lifting operations with a mobile crane? -
ANSWERS-Winds in excess of 35 mph
4. What is the term that best describes surface wear on a wire rope sling to rubbing or sliding? -
ANSWERS-Abrasion
5. Which of the following defects discovered during an inspection would cause for removing a
wire rope sling from service? - ANSWERS-Ten broken wires in one lay
6. According to OSHA, each day before being used, all rigging hardware and slings shall be
inspected for damage or defects by a? - ANSWERS-Competent person
7. When the hoist line is not vertical what type of dynamic force is being introduced to the
crane? - ANSWERS-Side pull
8. What is the term used to describe the ultimate or maximum load that a sling fails at ? -
ANSWERS-Breaking strength
9. A non-shouldered eyebolt is primarily designed for lifting in which plane ? - ANSWERS-Vertical
, 10. According to ASME B30.9, (Slings) what is the maximum width of an object that can be
placed in the eye of a wire rope sling? - ANSWERS-1/2 the length
11. What is the term used to describe a sudden or unplanned loading of the crane when raising
or lowering a load that will increase the stress on rigging and the load? - ANSWERS-Shock
loading
12. What formula is used to determine the sling length when you only know the hook height
and the distance from the center of gravity to the pick point? - ANSWERS-A2+B2=C2 look at
paper
13. What is the approximate weight of one cubic foot of steel ? - ANSWERS-480 pounds (lbs)
14. Which type of sling is required to have permanent affixed identification tag stating size,
grade, rated capacity for hitch type that can be used? - ANSWERS-Alloy steel chain sling
15. Where would you measure to check the diameter of wire rope? - ANSWERS-Across the
crowns
16. How is the working load limit of slings determined? - ANSWERS-Divide the breaking strength
by the design factor
17. What is the formula used to find volume of a rectangle? - ANSWERS-Length x height x width
18. The tag on a synthetic web sling shall have what required information on it ? - ANSWERS-
Name of manufacturer
Rated load for each hitch type
and type of material
Answers7
1. A wire rope that is a 6x19 classification could have how many wires per strand? - ANSWERS-
15 through 26 wires per strand
2. How often should a synthetic web sling be inspected? - ANSWERS-Each day before use
3. Which considerations should be given to suspend lifting operations with a mobile crane? -
ANSWERS-Winds in excess of 35 mph
4. What is the term that best describes surface wear on a wire rope sling to rubbing or sliding? -
ANSWERS-Abrasion
5. Which of the following defects discovered during an inspection would cause for removing a
wire rope sling from service? - ANSWERS-Ten broken wires in one lay
6. According to OSHA, each day before being used, all rigging hardware and slings shall be
inspected for damage or defects by a? - ANSWERS-Competent person
7. When the hoist line is not vertical what type of dynamic force is being introduced to the
crane? - ANSWERS-Side pull
8. What is the term used to describe the ultimate or maximum load that a sling fails at ? -
ANSWERS-Breaking strength
9. A non-shouldered eyebolt is primarily designed for lifting in which plane ? - ANSWERS-Vertical
, 10. According to ASME B30.9, (Slings) what is the maximum width of an object that can be
placed in the eye of a wire rope sling? - ANSWERS-1/2 the length
11. What is the term used to describe a sudden or unplanned loading of the crane when raising
or lowering a load that will increase the stress on rigging and the load? - ANSWERS-Shock
loading
12. What formula is used to determine the sling length when you only know the hook height
and the distance from the center of gravity to the pick point? - ANSWERS-A2+B2=C2 look at
paper
13. What is the approximate weight of one cubic foot of steel ? - ANSWERS-480 pounds (lbs)
14. Which type of sling is required to have permanent affixed identification tag stating size,
grade, rated capacity for hitch type that can be used? - ANSWERS-Alloy steel chain sling
15. Where would you measure to check the diameter of wire rope? - ANSWERS-Across the
crowns
16. How is the working load limit of slings determined? - ANSWERS-Divide the breaking strength
by the design factor
17. What is the formula used to find volume of a rectangle? - ANSWERS-Length x height x width
18. The tag on a synthetic web sling shall have what required information on it ? - ANSWERS-
Name of manufacturer
Rated load for each hitch type
and type of material
