NCCCO Rigger 1 Study

NCCCO Rigger 1 ( / ) Study Questions with Correct Answers Rated A+

• A wire rope that is a 6x19 classification could have how many wires per strand? - CORRECT

ANSWER -15 through 26 wires per strand

• How often should a synthetic web sling be inspected? - CORRECT ANSWER -Each day before

use

• Which considerations should be given to suspend lifting operations with a mobile crane? -

CORRECT ANSWER -Winds in excess of 35 mph

• What is the term that best describes surface wear on a wire rope sling to rubbing or sliding? -

CORRECT ANSWER -Abrasion

• Which of the following defects discovered during an inspection would cause for removing a

wire rope sling from service? - CORRECT ANSWER -Ten broken wires in one lay

• According to OSHA, each day before being used, all rigging hardware and slings shall be

inspected for damage or defects by a? - CORRECT ANSWER -Competent person

• When the hoist line is not vertical what type of dynamic force is being introduced to the

crane? - CORRECT ANSWER -Side pull

• What is the term used to describe the ultimate or maximum load that a sling fails at ? -

CORRECT ANSWER -Breaking strength

• A non-shouldered eyebolt is primarily designed for lifting in which plane ? - CORRECT

ANSWER -Vertical 1 / 2

• 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? - CORRECT ANSWER -1/2 the length

• 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? - CORRECT ANSWER - Shock loading

• 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? - CORRECT ANSWER -A2+B2=C2 look at paper

• What is the approximate weight of one cubic foot of steel ? - CORRECT ANSWER -480

pounds (lbs)

• Which type of sling is required to have permanent affixed identification tag stating size,

grade, rated capacity for hitch type that can be used? - CORRECT ANSWER -Alloy steel chain sling

• Where would you measure to check the diameter of wire rope? - CORRECT ANSWER -Across

the crowns

• How is the working load limit of slings determined? - CORRECT ANSWER -Divide the

breaking strength by the design factor

• What is the formula used to find volume of a rectangle? - CORRECT ANSWER -Length x

height x width

• The tag on a synthetic web sling shall have what required information on it ? - CORRECT

ANSWER -Name of manufacturer

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