Download NCCCO Core Exam Questions and Answers: 2024-2025 Edition and more Exams Workplace Safety in PDF only on Docsity!
NCCCO CORE (345 QUESTIONS AND
ANSWERS) 2024-2025 NEW REVISED
EXAM GRADED 100% PASS.
If taking sides strain on a boom what concerns the operator the most - Precise answer Boom damage If a crane load chart has capacities listed in the shaded area this means that - Precise answer If overloaded structural confidence will be compromised As the layers of rope on a drum increase the allowable line Pull wil - Precise answer Decrease Of the following actions which one will most likely cause a side load condition - Precise answer Abruptly starting or stopping the swing Cording to OSHA with any hook ball or attachment at its lowest point a minimum of blank reps must remain on the drum at all times - Precise answer 2 What is the minimum distance of crane must maintain from powerlines rated below 50 KV - Precise answer 10 feet What is the best procedures to follow if underground utilities are present - Precise answer Contact utility company For boom is reeves eccentrically to the block the most common result would be - Precise answer Twisting of the boom What is the safety factor for 6 x 19 IWRC wire rope - Precise answer 3.5- What is the safety factor for rotation resistor wire rope - Precise answer 5- 1 What is the safety factor for rigging hardware - Precise answer 5-
What is the safety factor one hoisting personnel using IWRC wire Rope - Precise answer 7- What is the safety factor hoisting personnel using rotation resistance wire rope - Precise answer 10- Unless the manufacturer states otherwise the wind speed to seize hoisting Shall be - Precise answer 30 mph When hoisting personnel OSHA requires wind speed not to exceed - Precise answer 20 mph Who has the responsibility of determining the correct weight of the load - Precise answer Supervisor When an operator leave there a crane they must - Precise answer Land load engage all locks and Pawls and lock machine When is it safe to work closer than alarm for distance from any powerline - Precise answer When the utility company certifies that the lines are D energized When operating a crawler crane what is the most unstable allowable quadrant of operation - Precise answer Side What is not a good location for crane set up - Precise answer Above utilities If an operator arrives at a job site and the crane is already set up how would he checked the main an auxiliary breaks - Precise answer Left the load a few inches off the ground and test the brakes Tipping capacities for crawler cranes are based on - Precise answer 75% The term load radius is best defined as - Precise answer The distance from the center of rotation of the crane to the center of gravity of the suspended load
Maintain the correct distance according to the rated KV Ground the crane with the proper grounding cable Boom angle is best described as - Precise answer The angle between the loaded boom and the horizontal What is the best procedure to follow when underground utilities may be present - Precise answer Contact local utility company When using cable or nylon spreaders it is important to remember - Precise answer The lower the spreader angle the greater the tension When is spinning load presents a danger the operator should - Precise answer Use a tagline Parts of line means - Precise answer The number of lines running through the load block A sudden start or stop while operating a crane produces - Precise answer A dynamic load What percent of a cranes rated capacity is it classified as a critical lift - Precise answer 75% During disassembly of a long boom the hog lines are connected on a maximum cantilever point and the boom is slightly lifted off the ground which pins are to be removed next - Precise answer The bottom pins ahead of the cantilever point If you were to make a left using a four legged bridle how many legs are you going to calculate the load - Precise answer 3 According to OSHA all cranes equipped with a luffing jib must have - Precise answer Check valve When performing picking Carrie with a boom truck the speed limit is - Precise answer As prescribed by the manufacturer
When determining backward stability the crane must be set up under the following conditions - Precise answer Crane unloaded and load block on supports Crane on outriggers Maximum boom angle Crane SHOULD NOT BE in the longest possible boom On a crane load chart the area referred to as over the front is - Precise answer Different depending on the crane manufactures definition When cranes included within the scope of ANSI are mounted on barges or pontoons the cranes load rating shall be - Precise answer Modified as recommended by the manufacturer The first layer of a Hoist drum should have a pitch diameter of no less than times the rope diameter - Precise answer 18 Drum rotation indicators must be installed on all hoist leavers - Precise answer True On a hydraulic boom hoist pistons a must be provided in case of hydraulic failure - Precise answer Pressure relief valve All cranes equipped with a torque converter must have a - Precise answer Clutch reachable from the operators station Controls for operating a superstructure mounted power plant shall include all of the following except - Precise answer Means to shut off two cycle diesel engines in emergency Forces on a cranes hand lever Shall not exceed - Precise answer 35 lbs Forces on a cranes Foot pedal shall not exceed - Precise answer 50 pounds The travel distance on a cranes two way lever must not exceed from the neutral position - Precise answer 14 inches The travel distance on a cranes one-way lever must not exceed from the neutral position - Precise answer 24 inches
Three audible signals - Precise answer Go back A crane must stay at least from energize powerlines under 50 Kv - Precise answer 10 feet A crane operator must respond to a stop signal from - Precise answer Eveyone The margin of stability on a truck crane is - Precise answer 85% Of the following who is permitted inside the fall zone - Precise answer Qualified rigger The revolving frame of equipment in which operating machinery is mounted is referred to as - Precise answer Super structure When is it permissible to be under the boom when assembling or disassembling a boom - Precise answer When the A/D Director proves it is in feasible not to work under the boom When installing pins on a lattice boom how should the pins be installed - Precise answer Tapered side out When assembling or disassembling a lattice boom crane the amount of boom extended out past the bridal/equalizer is known as - Precise answer Cantilever length During assembly or disassembly of cranes no part of the crane or its components can come within of powerlines - Precise answer 10' If any part of the crane rigging or attachments load/line can come within of a power line a dedicated spotter must be provided - Precise answer 20' Up to 50 KV - Precise answer 10 feet Over 50 to 200 kV - Precise answer 15' Over 200 to 350 KV - Precise answer 20'
Over 350 to 500KV - Precise answer 25' Over 500 to 750 KV - Precise answer 35' Over 750 to 1000Kv - Precise answer 45' If operating a crane in proximity of power lines over 1000 V what is the minimum clearance - Precise answer Determined by the utility company During hoisting operations in proximity of powerlines all tag lines and rigging should be - Precise answer Synthetic Powerlines or presumed energized unless - Precise answer The utility companies certifies the lines are D energized and they are visibly grounded Up to .75 kv - Precise answer 4' Over .75 to 50 Kv - Precise answer 6' Over 50 Kv to 345 Kv - Precise answer 10' Over 345 kvvolts to 750 kV - Precise answer 16 feet 750 kV to 1000 kV - Precise answer 20 feet What type of inspection requires no documentation - Precise answer Shift During what inspection classification does inspection of ground conditions take place - Precise answer Shift I frequent inspection is made - Precise answer Weekly to monthly A periodic inspection is made - Precise answer Monthly to annually A shift inspection must be completed - Precise answer Before the end of shift What inspection classification requires disassembly of a crane as necessary - Precise answer Annual/comprehensive
Hooks must be discarded if a throat opening of more than as found - Precise answer 5% Hooks must be discarded if a twist of more than what is found - Precise answer 0° When performing duty cycle work the rule of thumb is to - Precise answer Use 80% of the manufacturers load chart When assembling a lattice boom crane in what order should boom sections be installed - Precise answer Shortest closest to boom base When extending bloom sections on a hydraulic crane you should - Precise answer Extend all the sections equally When assembling a lattice boom on a truck crane the outriggers must be fully extended and the boom placed - Precise answer Over the quadrant of maximum stability When handling boom sections what type of sling is preferred - Precise answer Synthetic The distance it takes a strand to make a complete revolution around its core is referred to as - Precise answer Lay length How many random broken wires must be present for running route to be removed from service - Precise answer Six In one lay How many broken wires and one strand of one lay must be present for removal - Precise answer Three What is the minimum number of broken wires must be present and standing rope to warrant removal - Precise answer Two////One is allowed How many broken wires are permitted at and end connection of a pendant line - Precise answer 1 How many broken wires present in rotation resistant wire rope warrant removal - Precise answer Two in six diameters
What is the safety factor for running rope - Precise answer 3.5- What is the safety factor for rigging - Precise answer 5- What is the safety factor for rotation resistant wire rope - Precise answer 5- In order of hitch strength goes as follows - Precise answer Basket vertical choker Can a crane's roof serve as a workstation for rigging or assembly/disassembly or maintenance - Precise answer Only if it has the capability of supporting 250 pounds A load applied at an angle to the vertical plane of the boom is referred to as
- Precise answer Side load///// when you pick some thing not being directly over the Center of the load The drum flange shall not extend a minimum of what from the top layer of rope - Precise answer Half an inch Boom hoist sheaves shall have a minimum pitch diameter of - Precise answer 15 times rope diameter Load hoist sheaves shall have a minimum pitch diameter of - Precise answer 18 times rope diameter Lower block sheaves shall have a minimum pitch diameter of - Precise answer 16 times rope diameter All load test shall not exceed what of the manufacturers rated capacity - Precise answer 110% Before leaving his crane unattended the operator must - Precise answer Land the load set all dogs and pawls and shut the engine What is the minimum clearance needed between the cranes counterweight and any obstacle - Precise answer 2 feet
Tools and materials in an occupied personnel basket - Precise answer Must be secured When rigging personal platforms using a wire rope bridal - Precise answer A link must be used to ensure the load is divided evenly Bridals and rigging used for personal hoisting - Precise answer Can only be used for personal hoisting The ground pressure under outriggers is higher than it is under a crawler track because of a smaller bearing surface - Precise answer True Deflection of the boom and pendant stretch will increase - Precise answer Load radius Within what percentage of level does a telescopic boom crane have to be for the gross ratings in the load chart to remain valid - Precise answer 1% The load line of the crane you're operating comes into contact with an energize powerlines there's no sign of any other dangers such as fire and such situation you should - Precise answer Stay in the cab until the lines are D energized Unless the operator takes a count of boom deflection when lifted off the ground a properly rigged load may - Precise answer Swingout away from the crane According to be 30.5 mobile crane standard it's OK for an operator to leave the cab of a crane with the engine running so long as - Precise answer The operator keeps the crane in view and restricts access to the area around the crane Unless the manufacturer states otherwise truck cranes generally have no lifting capacity over which area - Precise answer front Working radius is defined as the distance from the - Precise answer Center of rotation of the crane to the center of gravity of the load Rough terrain cranes capacities are generally greater over the - Precise answer Front
Truck crane capacities are usually greater over the - Precise answer rear A crane is set up with three of us for outriggers fully extended and the fourth retracted unless the manufacturer states otherwise the capacity of the crane in this configuration will be found in the - Precise answer On Rubber chart Sideloading of the cranes boom is permitted - Precise answer Only with freely suspended loads Blocking cribbing may be placed under the Outrigger beams - Precise answer Never they go under the pads Timber blocking placed under the tips of the tracks on a crawler crane will: - Precise answer Make the crane more stable When handling boom sections the best place for slings to be attached is - Precise answer At the pin connection points at the ends of the top chords The tipping access of a crawler crane - Precise answer Depends if the idler or sprocket are in line or offset from the track rollers When setting a crane up on outriggers the wheels of the crane should - Precise answer be just high enough off the ground to relieve the tires of crane weight On pick and carry operations you should - Precise answer Keep the boom as short as possible On a crawler crane ground bearing pressure is greatest - Precise answer Over the corner When preparing to hoist a light load the hook should be positioned - Precise answer Directly above the loads center of gravity It's OK to temporary bypass a cranes overload warning system - Precise answer During assembly/disassembly operations
The main boom angle minus the gym offset would equal - Precise answer Jib angle to the ground You can use the range diagram to determine the - Precise answer Radius of unloaded boom Cranes on our acres are based on what percentage of stability - Precise answer 85% Cranes on crawlers are based on what percentage of stability - Precise answer 75% If a crayon is two blocked what functions should the anti-two block prevention system let you operate - Precise answer Boom up hoist down telescope in Of the following conditions what condition LMI not warn you of - Precise answer Out of level When operating a crane of a capacity of 25 tons or less on a barge the maximum list or trim is - Precise answer 5° When operating a crane over 25 tons on a barge the maximum list or trim is
- Precise answer 7° When operating a crane on a barge the crane must be - Precise answer Secured to the barge When using a four legged bridle the capacity is calculated using - Precise answer Three legs On a standing wire rope broken wires Adam and connection means the rope must be replaced - Precise answer Two Line pull is - Precise answer The amount of weight a drum will hoist for a given layer Backward stability on a mobile crane can become an issue when the crane is working - Precise answer Over the side at a minimum radius
Rotation resistant wire rope requires a higher safety factor because - Precise answer Internal damage occurs Timber mats work best when they are - Precise answer Bolted together Blocking under floats shall be - Precise answer Sufficient to support the crane and the load When operating a crane with a long boom on uneven ground you should - Precise answer Block under the pad and keep a 90° angle between the cylinder rod and pad When booming down a rough terrain crane and extending out Riggers from the cab you should - Precise answer Post a signal person One swing a suspended load on any crane with crawlers the most ground pressure will be exerted - Precise answer Over the corner A luffing jib on a conventional or hydraulic crane will - Precise answer Boom up or down independently of the main boom On a crane off level by 1% with a main boom height of 100 feet the whip line would be off-center by - Precise answer 12 inches////12 inches for every 1° for 100 feet The crane center of gravity were very the most swinging from the rear to the side with what type of crane - Precise answer Truck crane When is sideload is introduced to a lattice boom what part of the boom would encourage the highest stress - Precise answer Boom tip Voice signals must include - Precise answer Function and direction Distance and speed Function and stop When assembling or disassembling a lattice boom when is it permissible to work under the boom - Precise answer When the AV Director shows it is in feasible not to and the limits time and movement////safe=never only when says permissible
On a load chart values above the bold line mean - Precise answer Capacities based on structural competence The primary purpose for a rooster sheave or auxiliary boom point sheave is to - Precise answer Separate the hoist lines Where is the best location for a leveling a crane - Precise answer Upperworks What is the safe working load of right regular lay IWRC wire rope - Precise answer 3.5- What is the safe working load of boom hoist wire rope - Precise answer 3.5 to 1 What is the safe working load of rigging slings - Precise answer 5 to 1 What is the nominal strength of wire rope - Precise answer The ultimate load at which a tensile failure occurs What is a two leg bridal - Precise answer Two wire rope slings attached by a lifting ring Wire rope shall be removed from service if any of the following are present
- Precise answer Six randomly broken wires in one lay Three randomly broken wires in one strand and one lay Where or scraping of 1/3 the original diameter of outside individual wires Boom extensions and Jibbs are used - Precise answer To increase height Capacities above the bold line on the load chart are based on - Precise answer Structural strength When is it safe to work under the boom while erecting or dismantling - Precise answer Never safe What is the minimum clearance needed between the crane counterweight and any obstacle - Precise answer 2 feet
When working around powerlines you must - Precise answer Never stockpile material under powerlines Maintain the correct distance according to the rated kilovolt Ground the crane with the proper grounding cable When using a crane to pick and carry a load you must - Precise answer Tie off the load When using cribbing under your outriggers you should have at least times the total float area covered - Precise answer Three times the float area Hydraulic pumps supply to the cranes hydraulic system - Precise answer Pressure The minimum distance between the cranes boom and 50 kV high-voltage wires should be - Precise answer 10 feet Sideloading may be caused by - Precise answer Starting or stopping the swing to rapidly What is the best procedure to follow when underground utilities may be present - Precise answer Contact local utility company Eccentric main boom tip reeving causes - Precise answer Twisting of the boom Who has the responsibility for determining the correct weight of a load - Precise answer supervisor When an operator leaves the crane he must first - Precise answer Put the load on the ground and put all dogs or pawls in If replacing the hoist line wire rope on a crane how do you determine the size or type of wire rope to use - Precise answer Use manufactures operators manual or load chart After the crane has been checked out and before lift operations begin the crew should - Precise answer Have a pre-lift meeting
