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Crane Safety 2026
What may cause the bridge to skew - correct answers ✅Wheel slippage on one side only because of a slippery track, or a heavy load suspended from one end of the bridge. What is two-blocking and why is two-blocking dangerous? - correct answers ✅Two-blocking occurs when the hook block comes into contact with the upper sheave block during hoisting of the hook. It is dangerous because it could result in damage to the crane, parting of the hoist lines, and dropping the load. What is the formula for determining the area of a triangular shaped object? - correct answers ✅Base x Height divided by 2 When is it permissible for an operator to leave the controls of a crane while a load is suspended from the hook? - correct answers ✅The operator shall remain at the controls at all times while a load is suspended from the hook. Regardless of the method of communication used, all crane signals must be - correct answers ✅Clear What is the weight of a 24 square foot, 2 inch thick aluminum plate with a unit weight of 15 lbs. per square
Crane Safety 2026
foot of material per inch of thickness? - correct answers ✅720lbs Synthetic web slings should NOT be used in areas where temperatures exceed 194 degrees Fahrenheit. - correct answers ✅True Which of the following identifies the two categories of crane lifts? - correct answers ✅Complex and Non- Complex What is inching? - correct answers ✅Performing a motion very slowly, a little at a time While performing a pre-use check, the operator must check the wire rope system for all of the following except? - correct answers ✅Size and grade of wire rope Crane operators at naval activities may be required to operate various types of cranes for which they hold a license. Which of the following can best assure operator proficiency and safety? - correct answers ✅Be familiarized by a qualified person before operating the crane for the first time
Crane Safety 2026
Components that support the load and upon failure would cause dropping or uncontrolled lowering of the load are - correct answers ✅Load bearing parts What is meant by skewing? - correct answers ✅Skewing is where one end of the bridge gets ahead of the other end frequently causing binding on the rails. The expiration date that is of particular importance to crane operators is? - correct answers ✅The certification expiration date of the crane If an object has a volume of 200 cubic feet and the unit weight is 150 lbs. per cubic foot, what is its weight? - correct answers ✅30,000 lbs. What should an operator do if he/she is not sure of the meaning of a signal? - correct answers ✅Stop operation until the meaning of the signal is understood. Taking the slack out of rigging and starting to move a load or empty hook should be performed in first hoisting position or at the slowest possible speed. - correct answers ✅True
Crane Safety 2026
Components that control, restrain, or position the load and upon failure would cause dropping, shifting, or uncontrolled movement of the loads are - correct answers ✅Load controlling parts Which tag alerts operators to special instructions for operating the equipment? - correct answers ✅Caution Tag What are the actions required if an asterisked item on the ODCL is found unsatisfactory during the pre-use check of the crane? - correct answers ✅Stop operations, notify your supervisor of the condition, and annotate the deficiency on the ODCL Why shall sudden starts and stops of the bridge and trolley be avoided? - correct answers ✅Sudden starts and stops may cause skidding and uneven wear of the wheels. How should an operator check the hoist brakes when lifting a load? - correct answers ✅Lift the load a few inches off the ground and stop hoisting to ensure there is no slippage of the brakes.
Crane Safety 2026
Which of the following is considered to be the best way the operator can ensure the crane is safe to operate on any given day? - correct answers ✅Perform daily pre- use checks When making two-hook lifts, the capacity of ____________ must not be exceeded at any time - correct answers ✅either hook Knowing the load's approximate center of gravity prior to rigging or lifting a load is important? - correct answers ✅so the load does not shift, tip or swing out of radius, to help calculate stresses in each sling, and to help choose the correct rigging gear. (All of the above). What is the crane communications hand signal pictured with the arm extended downward, forefinger pointing down, and the hand moving in a small horizontal circle?
- correct answers ✅Lower What is the purpose of a hoist limit switch? - correct answers ✅to prevent over-travel of the hook block and the possibility of two-blocking Why should the hook be positioned directly over the load when attaching the load? - correct answers ✅To
Crane Safety 2026
avoid side loading and dragging the load as it is picked up The crane operator stops the crane whenever ___________ is in question. - correct answers ✅Safety Bridge cranes with rated capacities of less than 20, lbs. are classified as ___________ cranes. - correct answers ✅Category 3 More than one signal person may provide signals to a crane operator at a time. - correct answers ✅False Which of the following formulas would be used to find the volume of a rectangular or square shaped 3 dimensional object? - correct answers ✅length x width x height Shackles, wire rope slings, and/or eyebolts, may be used to their full capacity when used within ______ of vertical. - correct answers ✅5 degrees A crane accident occurs when any element of the crane operating envelope fails to perform correctly during crane operations, maintenance, or testing which could
Crane Safety 2026
safety of personnel or endanger equipment? - correct answers ✅Danger Tag Is it necessary for the operator to see the load or work area? - correct answers ✅Not if there is a designated signal person who is in control of the lift and is in view of the operator, or if the signal giver is in constant radio contact with the operator. A pillar-jib crane with a capacity of 22,000 lbs. is a ____________ crane. - correct answers ✅Category 2 While performing a monthly ODCL on a crane, you find minor deficiencies. What do you do? - correct answers ✅Note the deficiencies on the ODCL The majority of crane accidents are attributed to which of the following? - correct answers ✅Personnel error What is plugging? - correct answers ✅The use of reverse power instead of a brake to slow or stop the bridge or trolley travel When should a tagline be used during lifting operations? - correct answers ✅To prevent the load from swinging or rotating
Crane Safety 2026
If the crane operator and the rigger-in-charge disagree on whether or not a load is safe to lift, the operator should? - correct answers ✅Not operate the crane until contacting the supervisor to resolve the issue If an object is 6 feet long, 4 feet wide, and 2 inches thick, what is the area of the object? - correct answers ✅24 square feet Who is primarily responsible for evaluating a Crane Operator's physical and emotional fitness? - correct answers ✅The crane operator A monorail hoist with less than 20,000 lbs. capacity is a __________ crane. - correct answers ✅Category 3 What are the principal parts of an overhead traveling crane? - correct answers ✅Bridge girders, end trucks, trolley, and operator's cab or pendant control What is the crane communications hand signal pictured with the arm extended, palm down, and the arm moving back and forth horizontally? - correct answers ✅Stop
