NAVFAC P-307 Training Questions and Complete Solutions Graded A+

NAVFAC P-307 Training Questions and Complete Solutions Graded A+ What types of power does a category 1 or 4 crane generally use and what is it's source? - Answer: A hook is what type of component? - Answer: Load-bearing part Hydraulic foot brakes are what type of 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 Safety devices that affect the safe load lifting and handling capabilities of the equipment are considered ______________ safety devices - Answer: Operational which of the following does not affect the safe operation of the crane - Answer: General safety devices A travel alarm is what type of group of components - Answer: General safety devices to find the weight of a 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 a 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 weights 14 pounds per square foot, how much does the plate weigh (rounded up) - Answer: 1,200lbs A complex shape of 1 inch thick 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 weights 105 lbs per cubic foot. the box weighs 1200 lbs empty. the correct equation to find the total weight is - Answer: 27 x 105 = 2,835 + 1,200 = 4, 035 A cylinder is made of solid aluminum which has a unit weight of 165 pounds per cubic foot. What is the weight of this cylinder if the diameter is 4 feet and the height is 5 feet? - Answer: 10, 362 lbs A rectangular shaped tank has a length of 24 feet, a width of 10 feet, and a height of 12 feet. What is the volume of the tank? - Answer: 2,880 cubic feet An attachment point is 2 feet from the center of gravity and the other attachment point is 6 feet from the center of gravity. What is the correct percentage of weight distribution to each attachment point with the attachment point 2 feet from the center being listed first? - Answer: 75%, 25% center of gravity is best described as - Answer: where all the weight is concentrated the center of gravity is located below the center of balance. - Answer: false 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). 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 it's way directly under the crane hook when lifted off the ground. - Answer: true A 60 degree 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 sling would you select to ensure the horizontal sling angle was 60 degrees or greater? - Answer: 6 feet to find the sling angle stress - Answer: multiply the weight in the attachment point times the angle factor the reason test and inspection is required is to... - Answer: prevent personal 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: rated load the re-inspection due date rigging gear test and inspection records must include: - Answer: identification of individual components dates of tests and inspections latest test inspection results ALL of the above Matching ID marks on rigging gear are required for: - Answer: components that can be separated rigging gear test and inspection records are required to be kept on file - Answer: until replaced by a more current record for applicable rigging equipment (not including hoists, winches, cranes, and crane structures) a load test is held for a minimum of ___ minutes. - Answer: 2 for each load test if hoists, winches, cranes, and crane structures, the load test must be held for a minimum of ___ minutes - Answer: 10 Hoists, winches, trolleys, and other moving machinery must lift, or travel, the test load through at least ____ revolutions of all moving parts. - Answer: 1 What must be done if the OEM does not permit testing in excess of the rated load? - Answer: the equipment's rated load must be reduced individual components tested as a lifting assembly must: - Answer: not be used independently the actual test load, or test load tolerance, is plus 0 minus 5 (+0/-5) percent of the nominal test load for rigging gear ( not including cranes, cranes structures, hoists, winches, portable floor cranes, and portable gantry/A-frames). - Answer: false How often do cranes integral to larger machine systems, hoists, winches, magnetic lifters, personnel platforms, plate clamps, and vacuum lifters require a periodic load test? - Answer: every year documented records are required for periodic inspections of all rigging equipment. - Answer: false What are the two types of rigging gear inspections? - Answer: Periodic and pre_use who is required to preform an inspection prior to using rigging gear, and what is this inspection called? - Answer: the user, pre-use inspection What is the minimum grade of chain required for chain slings? - Answer: Grade 80 A knot in a synthetic sling is allowed as long as it does not cause permanent damage to the sling. - Answer: false Chain sling used in cargo transfer should be inspected annually. - 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 used 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: never used damaged gear consider height restrictions when selecting sling length never use gear past it's inspection due date base rigging gear on the total stress, not just the weight of the load follow all of 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 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 1/8 inch an angular pull of 45 degrees is allowed on non-shoulder type eyebolts - Answer: false the rated load of swivel hoist rings must be reduced when they are used for angular pulls. - Answer: false 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: galf-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 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 Prior to used load chains should be inspected for: - Answer: Damage Proper reeving the minimum D/d ratio in the body of a synthetic rope sling is: - Answer: 1:1 D/d ratio does not affect synthetic web slings. - Answer: true it is acceptable to bend a 1 inch wire rope sling around a 3/4 inch shackle. - Answer: false the minimum D/d ratio allowed for wire rope sling is: - Answer: 1:1 with the proper D/d ratio a sling in a basket hitch can lift_______ of the rated load of the sling - Answer: 200% detailed written procedures are required for: - Answer: complex lifts for all complex lifts, a rigger supervisor, operator supervisor, or a rigging or crane operator working leader shall review on-site conditions and shall... - Answer: conduct a pre-job briefing lifts of test weights during maintenance or load test are... - Answer: Excluded from the complex lift requirements A crane with a capacity of 100,000 pounds is performing a lift of 40, 000 pounds. this is an... - Answer: Non-complex lift which of the following identity the two basic categories of crane lifts - Answer: Complex and Non-complex Personnel lifts are... - Answer: Always considered complex lifts Personnel in a man-lift platform or basket must... - Answer: wear a safety belt with a shock-adorning lanyard For personnel lifts, the total load must not exceed... - Answer: 50% of the hoists rated capacity The crane team concept was developed to ensure that all operations involving the crane are executed without: - Answer: Injury to personnel damage to property damage to equipment ALL of the above the minimum crane team consists of: - Answer: the crane operator and rigger-in-charge additional crane team members may be assigned by... - Answer: the supervisor as required while the members of the crane team have individual responsibilities, each have joint responsibilities as well. each member must: - Answer: Perform all of the the listed actions above Securing the crane envelope is the... - Answer: combined responsibility of all team members crane operators are responsible for all of the following except: - Answer: slowing down when signals are unclear If you safely is in jeopardy during the performance of your task, you should: - Answer: Stop work and have the problem resolved The crane operator must immediately stop operations when... - Answer: the operating envelope is penetrated communications are lost during a blind or complex lift ant time a stop signal is given If an accident is reported, the preliminary investigation will be preformed by the - Answer: supervisor Planning the lift route is the responsibility of the: - Answer: Rigger-in-charge Coordinating the activities of the crane team is the responsibility of the - Answer: Rigger-in-charge Direct voice should only be used when: - Answer: the operator and rigger are working in close proximity and ambient noise is low In the crane cab, the crane operator must have a clear view of the ... - Answer: ASME Hand signal chart How many sugnalers shall communicate with the crane operator at the same time. - Answer: One sugnaler at a time A universal language understood by everyone involved with weight handling is: - Answer: Hand signals Any additional hand signals must be... - Answer: Approved by the activity Another form of communication, other than hand signals, must be used if... - Answer: The signaler is not in clear view of the crane operator what markings are required on hoists - Answer: the name of the manufacturer, model number, rated load, and re-inspection due date when securing a chain hoist ___________ may be used by securing the hand chain around the load chain - Answer: half-hitches Detailed written procedures are required for - Answer: Complex per - Answer: Padeye and lifting lug capacities depend on - Answer: Material and design Padeye side pulls should be restricted to - Answer: 5 degrees Visual inspections of attachment points include looking for - Answer: Cracks Corrosion Deformation What should be applied to an attachment point when it is - Answer: A Do Not Use or Danger Tag What may be used to align rigging gear in the plane of attachment point - Answer: spreader beams which of the following best defines lashing? - Answer: approved material wrapped around an object to provide a point for lifting when using wire rope clips to secure the ends of wire rope lashing, the rated load of the lashing is reduced by 20% or by the reduction due to D/d efficiency, whichever is the greater reduction - Answer: true when tying knots in synthetic rope lashing the rated load is increased by 50% - Answer: knots may never be used to secure synthetic lashing - Answer: false The hardware attachment point on a lashed load - Correct Ans: