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Category 3 Non-Cab Operated Crane Safety
A floating crane with a capacity of 200,000lbs. is a ________________ crane. - ANSWER - Category 1 What is the category of a jib crane with a capacity of less than 20,000 pounds? - ANSWER - Category 3 An OET, Bridge crane with a capacity of 80,000lbs. is a ________________ crane. - ANSWER - Category 2 A commercial truck mounted crane with a capacity of 14, lbs. is a __________ crane. - ANSWER - category 4 What types of power does a Category 1 or 4 crane generally use and what is its source? - ANSWER - Electric or hydraulic power supplied by a diesel engine
Load - ________ parts are those that restrain position or control the movement of the load. - ANSWER - controling A hook is what type of component? - ANSWER - Load-Bearing Part Hydraulic foot brakes are what type or group of components? - ANSWER - Load-Controlling Parts Load - _____________ parts are those that support the load. - ANSWER - bearing How is electrical current conveyed from the revolving portion of the crane to the lower crane structure? - ANSWER - Through the collector ring system Safety devices that provide protection for personnel and equipment are considered _____________ safety devices. - ANSWER - general
It is the operator's responsibility to report a deficiency to the Crane Department. - ANSWER - false Deficiencies are required to be reported by the end of the shift.
- ANSWER - false If the upper limit switch is working correctly, there is no need to check the lower limit switch. - ANSWER - fasle Part of the no load operational check is to ensure the proper _________ of all controls. - ANSWER - function What is the most important reason to do a pre-use check? - ANSWER - To make sure the crane is safe to use. Documented checks are required for which of the following Category 3 cranes? - ANSWER - gantry wall bridge
Place the steps listed in the correct order to check the Upper Limit Switch on a hoist. - ANSWER - Raise hoist two feet below switch & stop 2.Slowly raise hook block into switch 3.Ensure hoist stops with button depressed There must always be a minimum of _________ full wraps of wire rope on grooved drums. - ANSWER - 2 Part of the walk around check is to look for ___________. - ANSWER - deficiencies The minimum number of wraps of wire rope required on non- grooved drums is __________. - ANSWER - 3 What is the purpose of a hoist upper limit switch? - ANSWER - To prevent "two-blocking" or over-travel of the hook block Emergency stops and brakes should be checked while operating the crane at the fastest speed possible. - ANSWER - F
Personnel lifts are ... - ANSWER - always considered complex lifts. Personnel in a man-lift platform or basket must ... - ANSWER - wear a full body harness with a shock-absorbing lanyard. For personnel lifts, the total load must not exceed ... - ANSWER
- 50% of the hoist's rated capacity. To find the weight of a piece of aluminum plate, you would multiply ... - ANSWER - square feet times material weight per square foot based on a specified thickness. A triangular shaped 1 inch thick metal plate has a base of 10 feet and a height of 15 feet. What is the area of the plate? - ANSWER - 75 square feet A circular shaped 1/2 inch thick aluminum plate has a diameter of 7 feet. What is the area of the plate rounded up? - ANSWER - 39 square feet
A complex shape of 1 inch thick aluminum plate has a rectangular area of 64 square feet and triangular area of 16 square feet. If aluminum weighs 14 pounds per square foot, how much does the plate weigh (rounded up to the nearest hundred pounds)? - ANSWER - 1,200 lbs A complex shape of 1 inch aluminum plate measures 6 feet long on the top edge, 8 feet wide on the left edge, 12 feet long on the bottom edge, ending with a 10 foot long hypotenuse connecting back to the top edge. What is the correct equation to find the area of the triangular shape? - ANSWER - 8 x 6 / 2 The formula for determining the area of a triangular shaped object is: - ANSWER - Base x Height divided by 2 A box has 27 cubic feet of sand in it. Sand weighs 105 lbs. per cubic foot. The box weighs 1,200 lbs. empty. The correct equation to find the total weight is: - ANSWER - 27 x 105 = 2,
- 1,200 = 4,035 lbs A cylinder has a diameter of 12 feet, and a height of 17 feet. What is the volume of the cylinder rounded up? - ANSWER - 1,922 cubic feet
The center of gravity (CG) is always located within the object. - ANSWER - false Attachment point #1 is 6 feet from the center of gravity (CG) and attachment point #2 is 3 feet from the center of gravity (CG). There is a 10,000 lbs load attached. What is the correct equation to find the weight distribution for attachment point #1? - ANSWER - 3 divided by 9 multiplied by 10,000 (3 / 9 x 10,000) The center of gravity (CG) will always find its way directly under the crane hook when lifted off the ground. - ANSWER - false The reason test and inspection is required is to: - ANSWER - prevent personnel injury. identify sub-standard equipment.
remove unsafe equipment. Rigging gear identification markings applied by the activity usually indicate that the equipment is: - ANSWER - in an inspection program Equipment test and inspection requirements in section 14 of NAVFAC P-307 do not apply to: - ANSWER - oem installed bolt-on pads Which of the following markings are required on Lashing? - ANSWER - the reinspect due date rated load Rigging gear test and inspection records must include: - ANSWER - All of the above
A knot in a synthetic sling is allowed as long as it does not cause permanent damage to the sling. - ANSWER - false A metal mesh sling can remain in service if only one wire is broken in the mesh. - ANSWER - False Rigging hardware that is bent can be repaired by straightening it back to original shape. - ANSWER - false Rigging hardware such as eyebolts, links, rings, and shackles are required to have a periodic inspection every 2 years. - ANSWER
- False Distorted rigging hardware must be: - ANSWER - Removed from service and destroyed Documentation for alteration or repair of rigging equipment is required to be retained for: - ANSWER - the life of the equipment
Which section of the NAVFAC P-307 is the rigging gear section? - ANSWER - section 14 It is okay to use home-made rigging gear as long as you are lifting light loads. - ANSWER - false When selecting rigging gear for a job, which of the statements below should be followed? - ANSWER - all the above What should be used between the rigging gear and the load to prevent damage to the load and rigging? - ANSWER - appropriate sling protection Two people can operate a chain fall if the pull chain is too hard for one person to pull while hoisting a load. - ANSWER - False Pulls outside the plane of the eye are allowed on eyebolts as long as the rated load has been decreased. - ANSWER - False The minimum depth of thread engagement for a 3/4 inch eyebolt into a steel object is: - ANSWER - 1 1/8th inch
A 60° sling angle will be formed when you match the sling length to the diagonal distance between attachment points. - ANSWER - true An object has a length of 5 feet, a width of 3 feet, and a distance of 5 feet 6 inches between attachment points. What length slings would you select to ensure the horizontal sling angle was 60° or greater? - ANSWER - 6 to find sling angle stress... - ANSWER - multiply the weight in the attachment point with the angle factor What markings are required on hoists? - ANSWER - The name of the manufacturer, model number, rated load, and re-inspection due date What are the two types of inspections performed on hoists and rigging equipment? - ANSWER - pre-use inspection periodic inspection
When securing a chain hoist ________________ may be used by securing the hand chain around the load chain. - ANSWER - half hitches Two people may operate a hoist at the same time if the pull chain is too hard for one person to pull. - ANSWER - False A hoist can be hung from a wire rope sling without a shackle installed if the diameter of the hook is equal to or greater than the diameter of the sling. - ANSWER - true When lifting a load that is near the rated capacity of the hoist the hoist brake should be checked by: - ANSWER - lifting the load just clear of its supports, stopping movement, then checking to ensure the load is not lowering. Why should hoists not be used in tie down applications? - ANSWER - because they may be subjected to shock loading Hoist hooks must have latches or be moused during lifting operations. - ANSWER - true
When operating cranes, the operator's primary responsibility is to: - ANSWER - operate safely Crane operators at naval activities may operate various types, makes, and models of cranes for which they are licensed. How must safety and operator proficiency be assured under these circumstances? - ANSWER - Operators must be familiarized (as directed by a supervisor) before operating.
- ANSWER - certification number Which of the following operator responsibilities is considered the basis for ensuring a safe and reliable crane? - ANSWER - the presue Check or Operators Daily Checklist What information should be posted, clearly understandable, and readily available to the operator? - ANSWER - Lables for each function When can an unlicensed crane operator trainee operate a crane?Only under the direct observation of a licensed operator
- ANSWER - Only under the direct observation of a licensed operator When lifting loads with a crane, which of the following is the first thing an operator should do? - ANSWER - Center the hook over the center of gravity of the load. The second step in the procedure for lifting loads is to: - ANSWER - hoist slowly and remove slack from the rigging gear The third step for lifting loads is to: - ANSWER - lift the load until completely suspended and stop While operating, the crane operator becomes concerned over the safety of the lift. The Rigger-In-Charge sees no problem and tells the operator to continue. The operator should: - ANSWER - Refuse to continue until safety is assured. Side loading a crane boom by dragging loads or lifting a load with a non-vertical hoist may result in: - ANSWER - any of the listed factors above.
