NCCCO CORE Mobile Crane Operator Exam Questions and Answers, Exams of Nursing

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NCCCO CORE 119 Questions and Correct

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Before leveling a mobile crane on outriggers, an operator should ensure: - ✔there is no weight of the crane bearing on any tires Operating a mobile crane with a long boom, on uneven ground, what support condition should be considered? - ✔Keeping 90 degree angle between cylinder rod and pad What is the primary purpose fir a rooster sheave or auxiliary boom point sheave? - ✔Separate the boom hoist lines How many randomly broken wires in a lay length must there be on a mobile cranes hoist line, before it should be removed from service? - ✔ 6 On a mobile crane, how many broken wires are permitted at the end connection of a pendent before it must be taken out of service? - ✔ 1 Type 1 rotation resistant hoist wire rope has a design factor of: - ✔5 to 1 How many randomly distributed broken wires in rotation- resistant hoist wire rope are considered for replacement? - ✔2 broken wires in 6 rope diameters The term net capacity is best defined by which of the terms listed below? - ✔Gross capacity minus capacity deductions

Mobile cranes that are set up on barges, shall have a list chart provided by which of the entities listed below? - ✔Manufacturer When lifting loads on tires, mobile cranes are rated at what percentage of tipping? - ✔75% How does the effective weight of a slowed extension relate to the actual weight of the extension? - ✔Higher than the actual weight. When load radius is between radii values, the operator must use the: - ✔longer radius Why should only approved attachments or extra counterweights provided by the manufacturer be placed on the rear of the crane? - ✔They could cause a backward stability problem. A mobile crane's jib is offset 15º versus its original 0º offset, but the boom angle remains unchanged. In this situation, the load radius: - ✔increases Abruptly stopping a rapid swing on a long-boom mobile crane will produce what major effect? - ✔Collapsing the boom. When determining the position to a mobile crane should be left in over night, when high winds in the forecast the operator should: - ✔Follow the manufacturers recommendations. If a mobile crane is NOT set-up level and the operator swings the load from the high side to the low side, what effect will that have on the radius? - ✔The radius increase.

Increasing the distance from the crane's center of gravity to the tipping axis will have what effect on the mobile crane? - ✔Decreases stability. Backward stability of a mobile crane is tested in which configuration listed below? - ✔Basic boom at minimum angle with no load Deflection of the boom while operating a mobile crane will increase? - ✔Load Radius (Swings out) A sudden start or stop of the hoisting function while operating a mobile crane can produce a: - ✔dynamic load Before lifting an occupied personnel platform on a job site, which of the following applies? - ✔Use 50% of rated capacity, Trial lift to anticipated weight, Ensure rigging dedicated to platform only. According to OSHA 1926. 1431, while hoisting a personnel platform, what weather condition listed below will promptly discontinue the operation? - ✔Dangerous If working near overhead power line and using a tag line, which type of rope is least conductive to electricity? - ✔Polypropylene When working near power lines with the mobile crane, where does OSHA require caution stickers be installed on all equipment? - ✔At operators station and 2 on the outside of the equipment. According to OSHA table T, what is the minimum clearance for 133kV power lines? - ✔10ft

According to OSHA's table T, what clearance should a mobile crane IN TRANSIT keep while going under 445kV lines? - ✔16ft According to OSHA when is it safe to hoist loads with a mobile crane below energized power lines? - ✔When the fully extended boom can't reach the prohibited zone. According to OSHA 1926. 1411, when you encounter power lines with a voltage of 44kV and the crane is TRAVELING, according to Table T, what is the minimum required clearance? - ✔6ft According to OSHA, mobile crane load block hooks must not have a twist in excess of: - ✔ 0 According to OSHA, mobile crane load blocks hooks must not have a throat opening in excess of: - ✔5% When correctly installing U-bolt type wire rope clips, the U portion of the clip shall be on: - ✔the dead or short end What is the angle between the top of the load and the sling leg referred to in sling load charts? - ✔Horizontal sling angle When installing a wedge socket, it must be attached with the load line pulling in a straight line from the: - ✔pin What is the purpose of placing mats or cribbing under outrigger floats? - ✔Distribute the force over a larger area Where is the best location for leveling a crane? - ✔Upperworks

When may blocking (cribbing) be placed under outrigger beams on mobile cranes? - ✔Never approved Mobile cranes should be level to within what percent of grade? - ✔1% Timber crane mats work best when they are - ✔Bolted together When arriving in the crane at the job site, the operator should first determine the condition of - ✔access roads What surface listed below would NOT be a good location for assembly or setup of a mobile crane? - ✔Above underground vaults Each outrigger pad and its blocking should be sufficient to support? - ✔The total weight of the crane and its load How does high wind affect a mobile crane with a long boom? - ✔Introduces side load onto the boom When is the only time the outrigger beams should be less than fully extended? - ✔The load chart indicates that this is allowed. Eccentric main boom tip reeving causing which of the following: - ✔Twisting of the main boom Which type of wire rope listed below is installed on most cranes? - ✔Right regular lay

The hoist drum flange shall extend a minimum of ________ over the top layer of wire rope at all times while crane is in operation. - ✔1/2 inch Which of the following is classified as a standing wire rope? - ✔Pendant line. When lifting on outriggers the floats or pads should always be: - ✔Raised to touch the tires firmly on the ground. What is the minimum design factor required for a regular lay, boom or hoist wire rope? - ✔3. It is important to know when lubricating crane hoist wire rope, that the lubricant must: - ✔not hinder visual inspection How often is the competent person required to inspect the running wire ropes on a mobile crane? - ✔Each shift On mobile cranes, how many broken wires must be present in one strand of one lay for running wire rope to be removed from service? - ✔ 3 According to OSHA, what is the minimum number of full wraps of wire rope that must remain on hoist drums in all service conditions? - ✔ 2 On whose recommendations should a mobile crane preventative maintenance program be developed? - ✔Crane manufacturer On a mobile crane, the measurement for the load radius in this distance from the center of gravity of the suspended load to the: -

✔Center of rotation of the crane On a mobile crane, should the load be applied when determining the proper boom angle? - ✔Yes On a mobile cranes range digram, boom length and boom angle can be used to determine? - ✔Load radius On a mobile crane, what is the weight of the slowed jib that is deducted in load chart calculations called? - ✔Effective weight When determining boom tip elevation for a mobile crane, the user could: use the range diagram - ✔use the range diagram When lifting off the main boom, how is the effective weight of the flyjib different in the erected position from that of the stowed position? - ✔Effective weight increasses Why do most crane manufacturers reduce load capacity for duty-cycle operations? - ✔Side loading forces may occur What is the difference between anti-two-block warning device and an anti-two-block prevention device? - ✔Warning device only warns, but prevention devices will stop the functions How can the LMI's boom length or load radius reading be verified? - ✔Actual measurements On mobile cranes, what does the boom angle indicator show the operator? - ✔Angle of boom to horizontal

What is the device called that automatically stops the boom when it nears the cranes maximum angle? - ✔Boom hoist limiting When the number of layers of wire rope on a drum increases the: - ✔Allowable line pull decreases On a mobile crane, side loading of the boom could be caused by which of the following? - ✔Starting or stopping the swing too rapidly Which person listed below, has the responsibility for determining the correct weight of a load? - ✔Lift Director What must an operator do when an operator leaves the controls of the crane from an extended period of time? - ✔Apply all brakes and dogs, and lower the load to the ground When should a tag line be used, during the hoisting of material? - ✔When the rotation of the load would be dangerous What percentage of the rated capacity of a mobile crane must be used when lifting with two cranes attached to the same load? - ✔75% When lifting a load with two mobile cranes, it is very important to: - ✔Keep the hoist lines of both cranes vertical If lifting a load with two mobile cranes of different rated capacities, the crane with the larger rated capacity should: - ✔Be hooked at a distance closer to the loads center of gravity When performing a multiple crane lift is is important for the operator's of each crane to understand that: -

✔The weight may increase if the other crane lands the load When lifting loads that are submerged under water with a mobile crane, what is one of the conditions that the operator should be familiar with? - ✔Load will increase when lifting the load out of the water When lifting over water with a personnel platform, what are the occupants of the platform required to wear? - ✔A floatation device What is the minimum pitch diameter used for sheaves in a boom hoist reeving system using rotation resistant wire rope? - ✔Not less than 18 times rope diameter When can capacity altering modifications be made to mobile cranes? - ✔When permission is given by the crane manufacturer A crane is at the point of instability when the crane's leverage on the load equals: - ✔100% of the load's leverage on the crane Who must determine maximum speed for a mobile crane to travel with a suspended load? - ✔The competent person When traveling with a suspended load on a mobile crane climbing an incline, the load should be carried in which direction? - ✔Uphill Which mobile crane boom configuration can cause the most hazardous side-loading condition for the crane? - ✔Long boom with minimum radius When preparing to hoist a load, the load block hook should be positioned: - ✔Directly above the load's center of gravity

When making a lift on outriggers, the maximum ground-bearing pressure occurs in which boom position? - ✔Over the corner When personnel platforms are hoisted with a mobile crane what item listed below must be provided? - ✔And anti two-block device Personnel platforms suspended on the hook of a mobile crane, must not exceed what percentage of a crane's capacity at any given radius? - ✔50% When proof testing a personnel platform to 125% of its rated capacity, how long must the platform be suspended? - ✔5 minutes Which of the following correctly states the requirements for hooks used to hoist employees on a crane- supported personnel platform? - ✔Hooks shall have a latch that closes and locks OSHA permits hoisting of personnel by a crane as long as the employer can show: - ✔There is no less hazardous or practical way Before lifting an occupied personnel platform on a job site the crew must ensure they perform which of the following? - ✔Must attend a pre- lift meeting Must fully deploy all outriggers Must preform a trial lift Which of the following standards or regulations governs the lifting of personnel in construction? - ✔OSHA 1926. 1431

According to OSHA 1926.1431, which device listed below must be attached to the crane? - ✔Anti-two-block According to OSHA 1926.1431, which of these hoist options is prohibited? - ✔Hoist free fall Inside the personnel platform except for gates, how much of the perimeter must contain a grab rail for the occupants? - ✔100% According to OSHA 1926. 1431, during personnel platform hoisting operations access gates NOT swing in which direction? - ✔Outward OSHA 1926. 1431 states that tag lines must be used: - ✔When necessary to control platform While hoisting in a personnel platform, direct communication must be maintained between the signal person and who? - ✔Operator, Rigger According to OSHA 1926, 1431, at wind speed must a qualified person be consulted? - ✔20 mph According to OSHA, when working near power lines when is a dedicated spotter required? - ✔When crane operator is unable to see the warning line of signs According to OSHA 1926 1408, when operating near high voltage power lines, what clearance shall be required when the rating of the lines is 275kV? - ✔20 feet w/encroachment precautions According to OSHA 1926. 1408, the minimum clearance between any part of the crane and power lines rated 50kV or below shall be: -

✔10 feet w/encroachment precautions According to OSHA 1926 1408, for power lines rated 100kV the minimum clearance between the crane and any lines shall be? - ✔15 feet w/encroachment precautions The term "jib offset" can be expressed as the jib angle to which mobile crane component listed below? - ✔Boom On a mobile crane the term "part's of line" refers to which item listed below? - ✔The number of lines running thru the load block and boom point sheaves What is the design factor for grade 80 chain slings? - ✔ 4 What grade alby steel chain should be used for hoisting slings? - ✔ 80 Loads rigged using a basket hitch should be ____ to prevent slippage. - ✔Balanced When slings encounter sharp edges on loads to be lifted, riggers shall ensure that slings are: - ✔Protected or padded According to OSHA, quadruple sling bridle ratings are the same as - ✔triple sling bridle ratings Which statement listed below is correct about basic load rigging? - ✔As horizontal load angle decreases, stress increases The approximate percentage of strength of choker, vertical, and basket hitches respectively are: -

✔75%, 100%, 200%

According to ASME which of the following listed below shall NOT be used for the suspension system on suspended personnel platforms? - ✔Synthetic web bridle When rigging a bundle of pipe or tubing, which of the following would provide the best contact between sling and load? - ✔Double wrap choker For any signal other than emergency stop, who is permitted to give hand signals to the crane operator during a lift - ✔A qualified signal person Move slowly hand signal - ✔ Use whipline hand signal - ✔ What is the first element of voice signals given to a crane operator prior to the lift? - ✔Function and direction According to OSHA, each series of voice signals contain how many elements? - ✔Three