NCCCO Core Mobile Crane Exam: Practice Questions and Answers, Exams of Nursing

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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?

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 What is prohibited by OSHA 1926 Subpart cc regarding wire rope on a crane? - ANSWER-Splicing What should be of major concern when considering surfaces for crane set up locations? - ANSWER- Voids, tanks, loose fill, depressions Which items are included in the suspended weight when calculating parts of line? - ANSWER-Load weight, rigging, load block

What site condition must an operator be concerned about prior to setting up a crane? - ANSWER-Soil stability must be sufficient What is an example of duty cycle crane operations? - ANSWER-High speed concrete placement Where must barriers be erected in accessible areas to provide protection in the cranes work area? - ANSWER-Within the equipment's rotating superstructure According to ASME B30.5, How frequently is a crane operator required to have a physical? - ANSWER- Every 3 years What is the result of rapid hoist acceleration? - ANSWER-Produces hook loads higher than actual weight Wire rope lubricant should not: - ANSWER-hinder visual inspection On what principle is crane stability based? - ANSWER-leverage Who must confirm that an overhead power line is de-energized? - ANSWER-Line owner The use of equipment to hoist personnel is prohibited except where the employer can demonstrate what? - ANSWER-Other methods would be more hazardous Which of the following would not cause the effect of impact loading on the crane? A. Sudden snatching of the load B. Rapid hoist acceleration C. High boom angle operations in windy conditions D. Graduated lever control application - ANSWER-D. Graduated lever control application According to OSHA 1926 subpart cc, How frequently must operational aides be checked? - ANSWER-Each shift

What is the minimum number of parts of line required to lift a load that weighs 38,588 lbs.? - ANSWER- 4 Which factor is the most important to consider about site access? - ANSWER-Compaction of approach roads What is one purpose of the load moment indicator? - ANSWER-To warn the operator of an overload condition How are construction site hazards and restrictions located and identified? - ANSWER-A pre-operational work site inspection How many calendar days may a crane work with a broken anti two-block devise, after receipt of the parts? - ANSWER- 7 According to OSHA 1926 subpart cc, when employees are engaged in hooking and unhooking loads in the fall zone, what type of hook must be used? - ANSWER-Hooks with self closing latch What is the purpose of the working area diagram? - ANSWER-To identify operational quadrants The gross load weighs 36,500 lbs, and the cranes line pull is 8,000 lbs. How many parts of line are required to make the lift? - ANSWER- 5 According to OSHA 1926 subpart cc, what is not allowed inside the fall zone? - ANSWER-Qualified evaluator According to OSHA, how often must rigging equipment be inspected? - ANSWER-Prior to use The load radius is the distance from the center of rotation to the centerline of the vertical hoist line(s) with - ANSWER-The suspended load

All of the following can cause a two-block condition except - ANSWER-Raising the boom According to OSHA 1926 subpart cc, where must electrocution hazard warnings be posted? - ANSWER-In operators cab and on outside of crane What may be required while traveling a crane without a load on a job site under or near power lines? - ANSWER-A dedicated spotter According to OSHA 1926 subpart cc, the total load of a personnel platform must not exceed what percent of the crane's rated capacity? - ANSWER-50% According to ASME B30.5, what is the first action to be performed if the crane loses power? - ANSWER- Set all brakes and locking devices What is the minimum clearance for cranes traveling with no load near an energized 40kv electrical line? - ANSWER-6 feet If outriggers are set at positions that do not correspond to load/capacity charts, the manufacturer shall be consulted. Who must be consulted if the required information is not available from the manufacturer? - ANSWER-Qualified person When should regular lay running rope be replaced? - ANSWER-When it has 3 broken wires in one strand in one lay Who is responsible to know and follow the manufacturer specified procedures of assembly/disassembly of the crane? - ANSWER-A/D director What is the maximum amount of weight that can be imposed on one outrigger when lifting over a corner? - ANSWER-100% of the crane and the load According to OSHA 1926 subpart cc, who has the responsibility of ensuring that the area needed to support the crane has been prepared adequately before crane operations begin? - ANSWER-Crane operator

According to OSHA 1926 subpart cc, what is part of a crane shift inspection? - ANSWER-Ground conditions What is the minimum distance a drum flange shall extend over the top layer of rope? - ANSWER-1/2" What is the term that is used to define the load plus all rigging components, hook blocks, and other lifting equipment? - ANSWER-Gross load What describes a load applied at an angle to the vertical plane of the boom? - ANSWER-Side loading Why are load ratings for a mobile crane mounted on a barge modified? - ANSWER-Trim and list When lifting from the main boom with jib erected, what effect does the jib have on the crane's capacity?

• ANSWER-Reduces capacity by effective jib weight What is the most important consideration of an operator must leave a crane that remains in contact with overhead power lines? - ANSWER-Avoid simultaneous contact with the ground and crane Cranes with suspended loads generate the highest ground pressure when working over which of the following? A. The corner B. The front C. The side D. The rear - ANSWER-The corner What capacity rating should be used when measured load radius falls between the radii listed in the load chart? - ANSWER-The gross capacity for the next longer radius listed in the chart What happens to crane's capacity when lifting with the offset jib? - ANSWER-It is reduced

Structural boom failure may be caused by which of the following? A. Lifting over the front B. Lifting at low boom angles C. Lifting over the corner D. Excessive side loading - ANSWER-Excessive side loading What is important to remember when considering the angle between the rigging and the horizontal in a two-legged bridle? - ANSWER-The lower the sling angle the greater the tension According to ASME B30.5, what shall the operator do when there is a slack rope condition? - ANSWER- Determine the rope is seated on the drum and sheaves According to OSHA 1926 subpart cc, what is the minimum clearance distance required during operation for power lines that are below 350kv and the exact voltage is unknown? - ANSWER-20 feet What is the most common appearance of rotation resistant rope if core failure is suspected? - ANSWER- Localized reduction in diameter What effect do weights of load handling devices such as load blocks, slings, and ropes have? - ANSWER- They are considered part of the load According to OSHA 1926 subpart cc, who is responsible to ensure that ground preparations have been provided to meet manufacturer requirements for crane assembly and use? - ANSWER-Site supervisor What is the correct way to form a basket hitch? - ANSWER-By wrapping around the object with both eyes on the hook The best way to determine the weight of the load to be lifted is to - ANSWER-Have a certified load weight and add in the weight of the rigging According to OSHA, how many full wraps of rope are required on a hoist drum when the hook is at its lowest point? - ANSWER-2 full wraps

The rated lifting capacities listed in the crane's load chart minus all deductions is - ANSWER-Net capacity When using voice signals, what element is first? - ANSWER-Function and direction According to OSHA 1926 subpart cc, the term "must" is used to indicate - ANSWER-Mandatory What is the main reason for using timber blocking or mats under the crane's outrigger pads or crawlers?

• ANSWER-Decrease the applied ground pressure How can the operator verify that the radius indicated on the operational aide is accurate? - ANSWER-By measurement What source should be used to determine tip height? - ANSWER-Working range diagram According to OSHA 1926 subpart cc, what is the minimum clearance distance of a crane's boom, load line, or load when working near a 400kv power line? - ANSWER-25 feet What is the purpose of a drum rotation indicator? - ANSWER-Indicate the direction and speed of the hoist drum When is the hoist line on the top side of the boom considered part of the load? - ANSWER-It is not considered According to ASME B30.5, what do 2 audible signals made by the operator mean? - ANSWER-Go ahead What is the purpose of the boom angle indicator? - ANSWER-Indicates the angle of the crane's boom to horizontal Which of the following is true about the capacity of a vertical hitch? - ANSWER-It is greater than a choker hitch

According to OSHA 1926 subpart cc, how many randomly distributed broken wires in rotation resistant wire rope are cause for replacement? - ANSWER-2 broken wires in 6 rope diameters According to ASME B30.5, what effect does the weight of a nonstandard boom attachment have when calculating capacity? - ANSWER-It deducts from the load ratings What can cause excessive side loading of the boom? - ANSWER-Dragging the load Which of the following boom configurations is listed in order of strongest to weakest? - ANSWER-Basket, vertical, choker Which of the following is required during crane setup? - ANSWER-Adequate counterweight clearance According to OSHA 1926 subpart cc, prior to hoisting employees at each job site, the personnel platform and rigging must be proof tested to what percentage of its rated capacity? - ANSWER-125% According to ASME B30.5, what does a load indicator measure? - ANSWER-The weight of the load What is the definition of D/d ratio? - ANSWER-The load diameter divided by the sling diameter When calculating a crane's net capacity, what is the correct procedure to follow of the rating listed in the capacity chart is greater than the permissible line pull of the wire rope? - ANSWER-Use the permissible line pull of the wire rope and make deductions According to OSHA 1926 subpart cc, what is the minimum distance that must be maintained between a working crane, load, or load line and an 8kv line? - ANSWER-10 feet