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NCCCO Core Questions
The term "Superstructure or Upper works" refers to the area of the crane: Above the swing circle A crane must be level within _______% for the load chart ratings to be valid? 1% On what principle is crane stability based? Leverage What would be the effect of moving the tipping axis closer to the cranes center of gravity? Reduced stability Which of the following matches the appropriate load chart to a particular crane? Serial number A durable rating chart with legible letters and figures shall be provided with each crane accessible to: The operator at the controls The lifting capacities listed in the load chart assume that:
The lift is to be performed under ideal conditions A "rough terrain" crane set up on outriggers that is based on 85% tipping should have the tires: Off the supporting surface Load charts are based on stationary loads, which are also known as: Static loads The capacity in a mobile crane's load chart are based on either structural limits or Stability The values listed in the manufacture's load chart show: Rated capacities Net capacity is: Manufactures load ratings minus capacity deductions When determining the "gross load" the best method is: Get an accurate load weight and add the rigging The weights of load handling devices, such as load blocks, spreader bars, and slings are considered: Part of the load
Crawler cranes produce the least amount of ground pressure is over the: Side What is the best source of information for determining boom tip height? Working range diagram What is the purpose of a work area diagram (chart)? To identify operational quadrants Ona telescopic boom truck with outriggers properly positioned, the working area chart will indicate "over front" area is: Determined by the crane manufacturer When the load radius falls between capacities listed in the load chart use the gross capacity for the Longer radius When the boom angle falls between the capacities listed in the load chart use the gross capacity for the Lower boom angle When load charts are between the values listed in the load chart, the value that must be used is the: Lower at a longer radius
A load moment indicator (LMI) is a computer installed on cranes designed to: provide the operator with information regarding the boom length, boom angle, boom tip height, working radius, rated load and a total calculated weight being lifted by the crane. The LMI also warns an operator when an overloading situation is about to occur. True
. A crane operator plans to lift a gross load that weighs 26,300 Ibs. Based solely on the line pull of the crane base 6,000 Ibs. what are the minimum parts of line required to — make the lift? Five Backward stability on a truck mounted crane could be dangerous when the crane is working on rubber, boom angle, minimum boom length: Over the side at a minimum radius Hydraulic cranes shall be equipped with holding valves to prevent boom lowering in the event of Hydraulic Failure What is the sum of the following deductions? Block = 1,350 Ibs; Rigging = 55 Ibs; Lifting beams = 200Ibs; 1,605 lbs. What is the minimum number of wraps required by OSHA to remain on load hoist drums? 2 wraps
Which unsafe condition could result when a wedge socket is attached directly to a load hook, using 6x19? Spinning load When inspecting the boom on a telescopic boom crane which item should be inspected? Wear pads Hoist lines that are not in use hanging below the boom tip are usually considered a deduction. When would a hoist line not be considered a deduction? When it's on top of the boom When a crane operator leaves the crane, the operator must first: Land all suspended loads A load applied at an angle to the vertical plane of the boom describes: Side Loading What is the primary purpose of a power take off (PTO)? Provides power transfer to the hydraulic pump(s) Rapid hoist acceleration
Produces hook loads higher than the actual load weight When is it permissible to leave a telescopic boom crane with the engine running? When operator can observe unauthorized entry The crane is performing a pick and carry operation. Some important factors that should be considered: the load being as low as possible, boom as short as possible, centered over the front quadrant Tire pressure Load chart capacities distinguished in bold type, marked with an asterisk, in a shaded area or above a bold line of the capacity chart are based on: Structural strength The proper way to calibrate a boom angle indicator is: Boom up or down so the boom is horizontal and level than set the indicator at 0 degrees In what case is someone allowed to make modifications to the crane? When manufacture approves it in writing What is the acceptable maximum number of broken wires at an end connection before standing wire rope be replaced? 1
Who is to give the operator hand signals? The person(s) assigned prior to the lift When leaving telescopic boom cranes unattended overnight or for longer periods, the boom should Be fully retracted and stowed OSHA 1926 Subpart CC, requires hoist drum rotation indicator to be installed on cranes manufactured after November 8, When the hoist drum is not visible to the operator A drum rotation indicator on a crane will tell the operator: Direction and speed of the hoist drum What is the purpose of an anti-two block device? To prevent the block or ball from contacting the boom tip What is the difference between an anti-two block warning device and an anti-two block prevention system? Warning device only warns, but prevention system will stop the operation All of the following can cause a two-block condition EXCEPT Raising the boom
According to OSHA 1926 Subpart CC, if the anti-two block device is not in proper working order on a telescopic boom crane, what alternative measure(s) are required to continue working? Clearly mark the cable and use a spotter when extending the boom According to ASME B30.5, which of the following is required for a boom length indicator? It must be readable from the operators station Which of the following is a temporary alternative measure when a boom length indicator malfunctions? Mark the boom with measured marks to calculate boom length According to ASME 830.5, what option provides guidance for an operator when a radius indicator becomes inoperative? Must measure radius An audible outrigger/stabilizer alarm indicates The outriggers/stabilizers are in motion What function does the holding valve on a vertical outrigger jack perform? Hold pressure in the vertical ram if a hydraulic connection fails How many strands are there in a 1/2 in. 6x37 wire rope?
According to OSHA 1926 Subpart CC, if any part of the equipment will get closer than 20 feet to the power line what is required? Dedicated spotter If an operator must leave the crane that is in contact with energized power lines and important precaution would be to: Avoid simultaneous contact with the crane and the ground ANSI/ASME B 30.5 requires a signal to observe power lines clearances and to be in constant communication with the operator when the crane is within: A boom's length of the limit of approach What is the proper procedure when using an insulating link or a boot near power lines? Be sure to maintain the correct allowable distance from the lines When a crane is working near power lines and the rotation of the load could become dangerous, you should: Use a dry polypropylene rope for a tagline When operating a crane in the vicinity of energized power lines less than 350kV but the exact voltage is unknown, you must maintain a clearance of at least: 20 ft.
What is the minimum allowable distance that a crane may operate near energized power lines up to 50kV? 10 ft. Dynamic motion such as swinging with the load can result in side loading of the boom and: A reduction in the duty cycle chart What is the MINIMUM sheave size required for lower load blocks? 16 times the nominal diameter of the rope used According to OSHA, when a crane is in transit, what is the minimum clearance for power lines less than 50kV? 6 ft A luffing jib requires A limiting device How is a rope lay measured? The length along the rope in which one strand makes one revolution around the core When is it permitted to side load a crane boom? Only with a freely suspended load
If a crane is working on tires it is based on what percentage of rated tipping capacity? 75% In a pick and carry operation, what is the rated tipping capacity of a crane based on? 75% If the rating on a chain or a sling is not visible: Do not use the sling What is an important consideration when lifting with a chain? The chain is marked with a rating The basket hitch requires: Both eyes of the sling in the hook By order of hitch strength from strongest to weakest which is the correct answer? Basket, vertical, choker When rigging a load that requires two slings, an important factor to remember is that: The lower the sling angle, the greater the tension
Which of the following sling angles is the weakest? 30 degrees The D/d ratio is: The diameter of the load divided by the body diameter of the sling When using a two-legged bridle hitch, a sling angle of 30 degrees, in comparison to 60 degrees, results in: Increased sling tension Nylon slings should not come into contact with: Acids When assembling or disassembling a crane boom, which type of rigging should be used? Synthetic slings When personnel are engaged in hooking, when unhooking or guiding a load in the fall zone they must: Wear steel toe boots Latch equipment hooks must be used unless: The application makes use of the latch impractical or unsafe
An auxiliary boom head/point keeps the main and the whip line separated and is intended to be used with: An auxiliary hoist Some very important factors that should be considered when performing multiple crane lifts are: having one lift director the cranes being level, not exceeding 75% of the rated capacity of each crane and: Cranes maintain a vertical hoist line When making a multiple crane lift is important for the operator to understand that the load increases at the suspended end and: If one crane lands the load the other crane may become overloaded Construction site hazards and restrictions are located and identified by: A pre-operational work site inspection Why do crane manufacturers reduce load capacities for duty cycle operations? Because the creation of side loading forces How often must rigging be inspected? Each shift, prior to use An operator must test the brakes Each time a load that is 90% or more of the maximum line is handled
According to ASME B30.5, if the power to the crane fails during operation, what is the FIRST action that should be taken? Set all brakes and locking devices What may be required while traveling a crane without a load on a job site under or near power lines? a dedicated spotter According to OSHA 1926 Subpart CC, the MINIMUM distance that must be maintained between any part of a working crane or load and an 8kV power line is 10 ft According to OSHA 1926 Subpart CC, for cranes traveling with no load, what is the minimum clearance power lines of 40kV? 6 ft The only time a suspended personnel platform is permitted to be used is when: Other methods would be more hazardous When lifting personnel platform, a telescopic crane does not have to be equipped with: Counterweight When lifting personnel what type of hook latch must be used? One that can be closed and locked
