NCCCO Core Questions and Answers for Crane Operators, Exams of Mobile Computing

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NCCCO CORE including tables

QUESTIONS &

ANSWERS(RATED A+)

TT 345-750V - ANSWER 16ft TT TA 500-750V - ANSWER 35ft TA TT 50-345V - ANSWER 10ft TT TA 750-1000V - ANSWER 45ft TA TA 50-200V - ANSWER 15ft TA TA 350-500V - ANSWER 25ft TA TT 750-1000 - ANSWER 20ft TT TT .01-.75 - ANSWER 4ft TT TA 200-350V - ANSWER 20ft TA

TA up to 50V - ANSWER 10ft TA TT .75-50V - ANSWER 6ft TT How many electrocution hazard warnings must be displayed - ANSWER 1 in cab 2 outside Using Running wire rope, ________ randomly distributed broken wires in ________ rope lay - ANSWER 6- ________ broken wires in one STRAND in______ rope lay - ANSWER 3- What is the ASME/ANSI standard for mobile cranes - ANSWER B30. Inspections every shift - ANSWER By a competent person and no document needed Monthly inspection - ANSWER Competent person documented for 3 months Annual inspection - ANSWER Qualified person documented for a year When should taglines be used - ANSWER When load is dangerous When hoisting personnel, within what percentage of level must a telescopic boom need to be at - ANSWER 1%

What do you do if a crane has been energized but no sign of fire exists - ANSWER Stay in cab until de-energized Net capacity of cranes main boom - ANSWER Capacity listed in load chart minus rigging and all attachments What area do truck cranes without a 5th outrigger have no lifting capacity - ANSWER Over the Front Definition of operating radius - ANSWER Distance from center of rotation to center of gravity of the load Which Quadrant are rough terrain crane capacities greater - ANSWER Over the front From which 2 points should the boom be measured - ANSWER Boom hinge pins to center of boom tip sheeve Which quadrant are truck crane capacities greater - ANSWER Over the rear Which accessible area of an operating crane must always be barricaded - ANSWER Swing radius of superstructure When does OSHA permit hoisting personnel by crane - ANSWER When there is no less hazardous or practicable way

While hoisting personnel total load must not exceed what percentage of crane capacity - ANSWER 50% When is side loading of crane booms permitted - ANSWER Only with freely suspended loads Placing timber blocking under tips of tracks on crawler crane does what - ANSWER More stability According to ASME, what percentage of the manufacturers crane rating must not be exceeded if a load test is done on a repaired crane - ANSWER 100% Where is the tipping axis of a crawler crane located - ANSWER Depends on idler or sprocket What to do with materials under energized power lines - ANSWER Never be lifted by crane Where should outrigger pads be placed when working at ground floor level near a CELLAR WALL - ANSWER At least as far back as the depth of the wall below ground What happens to ground bearing pressure if you move a crawler crane from soft to hard ground - ANSWER Stays the same When may a swivel be used with rotation resistant wire rope - ANSWER If manufacture approves

What should you do on pick and carry operations - ANSWER Keep boom length as short as possible What boom position would cause the greatest ground pressure when lifting with crawler cranes - ANSWER Over the corner How many parts of line are required to hoist a 36,500 lb. load of the maximum allowable line pull is 9,000 lbs - ANSWER 5 What determines the amount of deduction required for an erected jib that is not being used - ANSWER The effective weight of the jib What capacity should you use when the boom length of the crane falls BETWEEN the lengths listed in the load chart - ANSWER The next longest or next shortest boom length, whichever is the lower capacity. What happens to the leverage of the lord on a crane as the boom lowers - ANSWER It increases Where would you find hand signals - ANSWER OSHA Subpart CC Definition of gross capacity - ANSWER maximum weight a crane can lift (including all capacity deductions) given by the manufacturer for each configuration (number on the load chart) Definition of Capacity reductions - ANSWER Weight of each component the manufacturer requires to be deducted from its rated/gross capacity (block, ball, weight of rigging, etc)

Definition of Net Capacity - ANSWER Rated/Gross capacity minus capacity deductions Definition Net Load - ANSWER Gross load minus capacity deductions Definition Gross load - ANSWER Combined actual weight of the load to be lifted and the weight of all capacity deductions Definition radius - ANSWER Horizontal distance from center or axis of rotation to the center of gravity of suspended load In rotation resistant ropes, _______ randomly distributed broken wires in _______ rope diameters or ______ randomly distributed broken wires in _____ rope diameters. - ANSWER 2-6, 4- In Pendants or standing wire ropes more than ____ broken wires in one rope lay located in rope BEYOND end connections and/or more than ____ broken wire in rope lay located at an end connection - ANSWER 2- What is the Load Angle Factor if Horizontal Sling Angle Factor is 90 degrees - ANSWER 1. What is the Load Angle Factor if Horizontal sling angle is 60 degrees - ANSWER

What is the Load Angle Factor if Horizontal Sling Angle Factor 30 degrees - ANSWER 2.

What is strongest type of sling - ANSWER Basket What is the second strongest sling - ANSWER Vertical What is the weakest sling - ANSWER Choker Rated capacity of Angle of choke over 120 - ANSWER 100 Rated capacity of Angle of choke 90-120 - ANSWER 87 Rated capacity of Angle of choke 60-89 - ANSWER 74 Rated capacity of Angle of choke 30-59 - ANSWER 62 Rated capacity of Angle of choke 0-29 - ANSWER 49 What is the OSHA standard that covers the construction industry? - ANSWER CFR

Definition Boom length lattice measurement - ANSWER Center of the boom FOOT pin to the center of the HEAD SHEAVE pin Definition Effective weight - ANSWER The weight the manufacturer determines must be used as a capacity deduction. May be less or more than actual weight.

The effective weight of the deduction may be heavier or lighter than the actual weight (how much the weight of load affects the crane) Definition Anti two-block damage prevention feature - ANSWER A system that will stall when two-blocking occurs without causing damage to the hoist rope or crane machinery components. Definition Anti two-block warning feature - ANSWER A warning device to alert the operator of an impending two-blocking condition Definition Anti two-block device - ANSWER A device that, when activated, disengages All crane functions whose movement can cause two-blocking Definition IWRC - ANSWER Independent Wire Rope Core Definition line pull - ANSWER The amount of weight a drum will hoist for a given layer Definition load block position - ANSWER Positioned directly above the load center of gravity ASME B30.5 Physical Examination Requirements - ANSWER Every 3 years Definition of DRIFT - ANSWER A condition that occurs when the load continues to move after the crane or crane boom has stopped.

Crane functions that cause increased radius - ANSWER Extending the boom, booming down, rapid swing, booming down rapidly and boom deflection Crane functions that cause two-blocking - ANSWER Extending the boom, booming down, hoisting What is boom deflection - ANSWER Created when a load is applied to the crane, and slightly bends Definition Dynamic loading - ANSWER Occurs when the dynamic motion of the load dramatically increases the amount of stress applied to a crane Definition Dynamic Unloading - ANSWER Occurs when the load applied to the crane during lifting operations is suddenly released Definition of side loading - ANSWER Caused by lifting a lid without the boom tip completely centered over the top of the load, rapid swinging, stopping of the swing Definition of rated capacity - ANSWER The maximum allowable load that can be applied to a crane at a given radius How to reach maximum rated capacity - ANSWER Maximum Boom Angle with Minimum Boom Length What is the first thing to look for when setting up a crane - ANSWER Site access

Maximum allowable list and trim - ANSWER Must not exceed the amount necessary to ensure that all deck surfaces are above water and that the entire bottom area of the barge is submerged How many degrees is the maximum allowable degree for List and Trim - ANSWER 5 degrees A/D director - ANSWER An individual who meets this subparts requirements for an A/D director, irrespective of the persons formal job title or whether the person is non management or management personnel A/D director Must.. - ANSWER Meet the criteria for both "Competent Person" and a "Qualified Person" who understands the assembly and disassembly procedures What are the best mats to use - ANSWER Bolted together mats Where is the best place for leveling - ANSWER The Upper Works Capacity lost at 1 degree - ANSWER 30% Capacity lost at 2 degrees - ANSWER 41% Capacity lost by 3 degrees - ANSWER 50% Option 1 when securing barge to crane - ANSWER Physical attachment

Option 2 when securing barge to crane - ANSWER Corralling Option 3 when securing barge to crane - ANSWER Rails Option 4 when securing barge to crane - ANSWER Centerline cable system Option 1 for power line safety - ANSWER De-energize and grounded AT THE SITE Option 2 for power line safety for lines 350kV or less - ANSWER 20 ft clearance Options 2 for power line safety for lines above 350kV - ANSWER 50 ft clearance Option 3 for power line safety - ANSWER Table "A" When working near power lines, taglines must be - ANSWER Non conductive How many days does a power company have to provide voltage information after an employers request - ANSWER Two working days When is a lock latch not required - ANSWER When the latch creates a hazard How many categories are there for Inspections - ANSWER 3 (shift, monthly, annual)

Inspecting throat opening - ANSWER 5% not to exceed 1/4 inch Inspecting Wear - ANSWER Not to exceed 10% When inspecting wire rope a diameter reduction of more than __________ from nominal diameter - ANSWER 5% How many wraps does a drum must have for the core nccco test - ANSWER 2 Can I use rope lubricant? - ANSWER Rope lubricants must NOT hinder visual inspection What is the design factor for live or running ropes - ANSWER Not less than 3. What is the design factor for boom pendants or standing ropes - ANSWER Not less than 3. Type 1 must have an operating design factor of - ANSWER No less than 5 unless rope manufacture approves otherwise Design factor For duty cycle or repetitive lifts - ANSWER No less than 5 IWRC design factor - ANSWER 3. What is the minimum drum pitch diameter - ANSWER 18 times the diameter of rope

What happens to line pull strength when there are more layers on the drum - ANSWER Line pull strength decreases What is the most common wire rope used on cranes - ANSWER Right regular lay When lifting off the main boom, how is the effective weight of the jib different in the erected position from that of the stowed position? - ANSWER Effective weight increases Who must determine maximum speed for a mobile crane to travel with a suspended load? - ANSWER The competent person How does the effective weight of a stowed extension relate to the actual weight of the extension? - ANSWER Lower than the actual weight Using a telescopic mobile crane and lifting off the jib with the main boom partially extended, you should use __________________ to determine gross capacity. - ANSWER Boom Angle If not listed in the load capacity chart or notes for a telescopic boom crane and you are in between boom lengths, you should? - ANSWER Use the lowest shorter or longer Which of the following is required to be on a mobile telescopic boom crane in order to lift a personnel platform? - ANSWER Boom length indicator

When operating a rough terrain crane and extending the outrigger beams from the upper cab, you should? - ANSWER Make visual contact with beam and jack When a mobile cranes telescopic boom sections are required to be extended equally and they are not, the effect could be which if the following? - ANSWER Damage to the longest extended section What item listed below can be removed from a carry deck mobile crane, and continue to be operational? - ANSWER Jib/fly/extension What is the primary reason for lifting off a boom extension mounted on a mobile telescopic boom crane? - ANSWER Increase height Traveling a rear engine mounted rough terrain mobile crane, with a suspended load where should you position the load? - ANSWER Over the front quadrant A telescopic mobile crane is equipped with an anti two-block lock-out device. When the device is activated which functions will be disabled? - ANSWER Hoist, extend, and lower the boom What device below is NOT required on telescopic boom mobile cranes manufactured today? - ANSWER Swing Path Monitor Backward stability on a rough terrain mobile crane could be a problem when configured in which situation listed below? - ANSWER Over the side at a minimum radius

A telescopic boom mobile crane is going to lift a personnel platform, what is required from the list below to be operational on the crane? - ANSWER Controlled load lowering Which boom configuration can cause the most hazardous boom side load condition? - ANSWER Long boom with minimum radius According to OSHA when is it safe to hoist loads with a mobile crane below energized power lines? - ANSWER If fully extended boom can't reach the prohibited zone A crane loses stability when its leverage on the load is? - ANSWER Less than the loads leverage on the crane What is the design factor required when using non rotating wire rope SLINGS and lifting personnel in a platform suspended from a mobile crane? - ANSWER 10 When removing pins, employees must not be under the Boom, jib, or other components EXCEPT - ANSWER where the employer demonstrates that site constraints require one or more employees to be under the Boom when pins are being removed. Should pins pins in the pendants be removed under tension - ANSWER No When should you not remove pins from the boom - ANSWER When it's being supported by the UPPERmost boom section resting on the ground How should riggers be placed when assembling or disassembling - ANSWER Fully extended or if manufacture permits, deployed as specified in the load chart

During assembly or disassembly, the rigging work must be done by a - ANSWER Qualified rigger synthetic slings must be protected from what - ANSWER Abrasive, sharp or acute edges, etc What can never be used to protect slings - ANSWER Cardboard The order of boom sections should be.. - ANSWER SHORT to LONG On crawler or truck cranes, where should assembly or disassembly be done - ANSWER Over the quadrant of maximum stability According to OSHA 1926.1404, when setting up a crane the Outriggers MUST... - ANSWER be set to remove machine weight from the wheels Floats shall be secured to? - ANSWER Outriggers Pads must be_________to cylinder - ANSWER 90 degree angle Outrigger pads and dunnage should be able to... - ANSWER Support total weight of crane and load When making a lift on outriggers, the maximum ground bearing pressure occurs in which boom position? - ANSWER Over the corner

A mobile cranes jib is offset at 15 degrees versus its original 30 degree offset, but the boom Angle remains unchanged. In this situation, the load radius would? - ANSWER Decrease When a telescopic boom extension is offset from the main boom, the cranes capacity normally will be? - ANSWER Reduced On mobile cranes the boom Angle indicator indicates what to the operator? - ANSWER Angle of boom to horizontal Which regulation governs the lifting of personnel - ANSWER OSHA 1926. Backward stability of a mobile crane is tested in which configuration listed below?

• ANSWER Basic boom at maximum angle with no load On mobile cranes operating with outriggers retracted, the least stable position is when the boom is directly over the? - ANSWER Side When a rough terrain crane is working on tires, backward tipping is most likely to occur when lifting which configuration? - ANSWER Side quadrant at a short radius When traveling a rough terrain mo Ike crane with a suspended load, which of the following is the most important consideration? - ANSWER Boom low as possible with the load close to the surface.

When retracting the boom on a telescopic mobile crane, the hook block and load will move in what direction? - ANSWER Down Rough terrain mobile crane capacities are generally greater over the? - ANSWER Front Mobile crane capacities are generally greater over the? - ANSWER Rear What is the hand signal guy communicating to the operator if he is facing the load with his arms extend at should length in front of his body with his hands facing up and palms facing the operator? - ANSWER Wheel Travel You're setting your crane up in a confined area and you cannot fully extend your fourth outrigger. Your crane does not have a load chart for a intermediate extension working. In such a situation you should ya the capacities in the? - ANSWER On-rubber load chart How many RANDOMLY distributed broken wires in rotation-resistant rope are cause for replacement? - ANSWER 2 broken wires in 6 rope diameters Which is the most common cause of death to crane operators? - ANSWER Crane turnover Unless the manufacturer states otherwise, a truck crane generally have no lifting capacity over which area? - ANSWER The front Truck crane capacities are usually greater over the? - ANSWER Rear

A truck crane is set up on outriggers. The load chart governed by stability is based on what percentage of the cranes capacity? - ANSWER 85% A crane is set up with 3 of its 4 outriggers fully extended and the fourth retracted. Unless the manufacture states otherwise, the capacity of the crane in this configuration will be found in the? - ANSWER On-Rubber chart When lifting personnel the total weight of the loaded personnel platform must not exceed what percentage of the rates capacity of the crane? - ANSWER 50% When handling boom sections, the best place for slings to be attached is? - ANSWER At the pin connection points at the ends of the top chords Tipping axis of a crawler crane? - ANSWER Depends if the idler or sprocket are in line or offset from the track rollers On a crawler crane, ground bearing pressure is greatest over which quadrant? - ANSWER Over the corner If a job is erected but not being used to lift the load, you should make a deduction from the gross capacities listed in the load chart based on? - ANSWER The effective weight of the jib On a crawler crane, the part of the load chart governed by stability is based on what percentage of its capacity? - ANSWER 75%