NCCCO Certification of Crane Operators Core Exam Questions and Answers, Exams of Mechanical Engineering

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NCCCO Certification of Crane Operators Core

Exam Questions and Answers 100% Pass |

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David Mungai [Date] [Course title]

NCCCO Certification of Crane Operators

Core Exam Questions and Answers

100% Pass | Graded A+

Which of the following is an accurate statement about luffing jibs?

• Answer>> It raises and lowers independent from the boom What is the weakest quadrant of a boom truck? - Answer>> Front What effect would blocking up the ends of the tracks have on a crane? - Answer>> It would increase capacity over the ends The tipping axis of a crawler crane is? - Answer>> It depends if the idler or sprocket are offset from track rollers According to ASME B30.5 what percentage should not be exceeded on a mobile crane during a load test? - Answer>> 100% From strongest to weakest put the following hitches in order - Answer>> Basket, vertical, choker Which of the following should synthetic slings not be used around? - Answer>> Acid How often should you inspect a running rope? - Answer>> Daily The radius on a crane chart refers to? - Answer>> Center of rotation to center of gravity of the load or hook What percentage is the manufacture rate of capacity of a mobile crane on outriggers? - Answer>> 85%

The crane operator should respond to the stop signal from anyone - Answer>> True On a rough terrain crane what is the strongest quadrant? - Answer>> Front If an operator does not boom up to allow for a boom deflection, the load will? - Answer>> Move away from the Crane Where should the boom be positioned when beginning a lift? - Answer>> Directly over the center of gravity of the load A crane should always be barricaded within? - Answer>> The swing radius of the rear of the rotation superstructure counterweight The crane must have a ______ inspection performed both monthly and yearly. This information must be documented by the employer that conducts the inspection. - Answer>> Periodic Slings should always be marked with a capacity rate in tag. - Answer>> True The wire rope clip on a wedge socket Should always attached to the _______ Of the Crane. - Answer>> Dead end It is possible for a crane to be overloaded with no signs of tipping.

• Answer>> True In rotation resistant ropes if you have ______ broken wires and six rope diameter or _______ broken wires and 30 rope diameters, the rope must be removed from service. - Answer>> 2,

In order to operate a mobile crane on a barge, you must have - Answer>> List and trim capacity chart When lifting a load out of the water, the load will be come ________ When it breaks the surface - Answer>> Heavier What must be done when operating on a barge? - Answer>> Attach the crane to the barge Mobile crane is more stable when: - Answer>> The cranes leverage is greater than the load leverage As a crane tips the loads leverage - Answer>> Increases What should be done if a crane has a cracked windshield? - Answer>> Continue to operate if it causes no visible distortion On a truck crane or all-terrain crane, the strongest quadrant is normally the? - Answer>> Rear If boom links are in between on the load chart you should always:

• Answer>> Use lowest capacity of the next longer or shorter boom length If radius is in between on load chart, you should use: - Answer>> Next longer radius If the boom angle is in between on the load chart, you should: - Answer>> Use next lower boom angle Net capacity equals: - Answer>> Gross capacity minus all deductions

What are the industry standards that cover mobile cranes? - Answer>> OSHA 1926.1400 and ASME B30. In rotation resistant rope, if you have _____ broken wires and six rope diameter and ______ In 30 rope diameters, the rope must be removed from service. - Answer>> 2, And standard rope if you have _____ broken wires randomly distributed in a rope lay and ________ broken wires in a strand in a Lay It must be removed from service. - Answer>> 6, When picking off the main boom, what determines the unused jib deduction? - Answer>> The effective weight of the jib Setting up a mobile crane with long boom on uneven ground, what support condition should be considered? - Answer>> Keeping it 90° between cylinder rod and the pad How should the tires be positioned when setting up a crane on outriggers? - Answer>> All tires relieved of the cranes weight or preferably off the ground Who is responsible for determining the weight of the load? - Answer>> Lift Director A DOT Medical card normally is good for a period of how many years? - Answer>> Two years Upon arriving on site, the lift Director observed ground conditions are not suitable for safe crane operations, they should contact: - Answer>> Controlling entity

A _______ should decide the rigging points for an engineered lift are appropriate to ensure a safe lift: - Answer>> Qualified person The _______Shall ensure a qualified person has been designated lift Director: - Answer>> Site supervisor The _______ shall determine powerline proximities: - Answer>> Site supervisor When is it OK to use a swivel on rotation resistant wire rope? - Answer>> If manufacturer approves What should be done by the crane operator if the LMI malfunctions? - Answer>> Stop crane operations and report it to the supervisor Can a cranes lifting capacity be lower than its net capacity? - Answer>> Yes What should be done if the operator cannot see the outriggers for extension? - Answer>> Use a signal person Name The three ways that two blocking can occur? - Answer>> extending boom, hoisting or lowering the boom According to ASME Be 30.5 where should a portable fire extinguisher shall be installed? - Answer>> In the cab or at the machinery housing Where should the tools be kept on a crane when they're not being used? - Answer>> Toolbox

What is the most important factor when determining the capacity of the jib? - Answer>> Angle When is it OK to side load the boom of the Crane? - Answer>> Only when freely suspended loads On a boom truck, what is the normally the strongest quadrant? - Answer>> Rear What is a temporary alternative measure if the anti-two block is not functioning properly? - Answer>> Report the deficiency to your supervisor and mark the cable When should the crane operator check operational aids? - Answer>> Daily Cranes that have been idle for _____ Months or more must be given a monthly inspection by a qualified person. - Answer>> 3 The capacity of an extension or jib is normally based on? - Answer>> Structural strength The Outrigger pad or float must be secured to the stabilizer - Answer>> True Blocking under the outrigger pads is used for what purpose? - Answer>> Distribute the weight of the crane and a load over a greater surface area Which of the following statements apply during pick in Carry. - Answer>> Keep the boom as short as possible When driving a crane under powerlines in transit, the minimum distance is _______ up to 0.75 KV dot - Answer>> 4

If the crane does come into contact with powerlines, you should: - Answer>> Remain in the cab and try to disengage Crane from contacts If it is necessary to leave the Crane after contact with powerlines before they can be de-energized, you should - Answer>> Jump down then slowly shuffle away or take short jumps with feet together Always maintain at least _______ wraps on the drum unless the manufacturer states otherwise. - Answer>> 2 The rigging on a personal platform must have a _____1 safety factor. - Answer>> 5 When the load is________ or more of maximum line pole the operator must test the brakes of the crane by lifting the load a few inches in applying the brakes. - Answer>> 90 The term running wire rope refers to: - Answer>> A wire rope that moves over sheaves and drums Defined the term assist Crane - Answer>> A crane used to assist in assembling and disassembling a crane What must be done to ensure outriggers are in manufacturers specify position? - Answer>> Beam is pinned or marking shows it is correct configuration The crane must be equipped with an audible signal device horn - Answer>> True

Hooks should be removed from service if any increase in the throat opening exceeds ________ or as recommended by the manufacturer - Answer>> 5% In order to make sure the correct load chart is being used you should always go by there? - Answer>> Serial# On a mobile crane, the capacity can be increased by - Answer>> Booming up The boom angle on telescoping boom crane is ________After the load is lifted - Answer>> Angle between bottom of the base boom and horizontal The boom angle on lattice boom crane is ________ After the load is lifted - Answer>> Angle between centerline of boom and horizontal You should always extend boom sections equally unless the manufacturer states otherwise? - Answer>> True The big section being extended further would cause what? - Answer>> Tipping The smaller section being extended further would cause what? - Answer>> Structural damage What is accurate when measuring boom length? - Answer>> Measure from hinge pin to center of the boom tip sheaves When setting up a crane equipped with a front stabilizer, the front stabilizer should be put down _____. - Answer>> Last

Net capacity is determined by: - Answer>> Gross capacity minus all deductions Which of the following would cause the load to be more stable? - Answer>> Rigging above the center of gravity When must a signal person be used in relations to powerline proximity? - Answer>> If within boom length of the prohibited zone Wind blowing can cause backward tipping, side load your boom and increase your low radius - Answer>> True What can be done to prevent wire rope from unraveling when being cut - Answer>> Seizing Ground bearing pressure is: - Answer>> The pressure created by the weight of the crane and the load onto the outriggers What is most important when determine the capacity of the jib? - Answer>> Angle Running ropes should be removed from service if there are______ randomly distributed broken wires in a lay or______ broken wires in a strand in a lay - Answer>> 6, Rotation resistant ropes should be removed from service if there are______ broken wires and six rope diameters or_____ broken wires in 30 rope diameters - Answer>> 2, According to OSHA, what is the removal criteria for Standard running rope to be taken out of service? - Answer>> Six broken wires in a lay

What is the minimum distance for a crane operations around the powerline up to 50 KV? - Answer>> 10 ft What is the minimum distance around powerlines with the boom and transit position while driving under powerlines? - Answer>> 4 ft What is the minimum distance for a crane operations around powerlines that are 720 KV? - Answer>> 35 ft What is the minimum distance around powerlines with boom in transit position while driving under power lines and voltage is 350 KV - Answer>> 16 ft What is the minimum distance for crane operations around powerlines that are 150 KV? - Answer>> 15 ft What is the minimum distance around powerlines with boom in transit positions while driving under powerlines if voltage is 40 KV? - Answer>> 6 ft What is the minimum distance for crane operations around powerlines that are 800 KV? - Answer>> 45 ft What is the minimum distance around powerlines with boom in transit position while driving under powerlines in voltage is 150 KV? - Answer>> 10 ft When should blocking be used under the outrigger pads of the crane? - Answer>> When the support surface will not support the crane and load

What will happen to the ground bearing pressure if you move a crawler crane from soft ground to harder ground? - Answer>> It increases When Can the LMI or overload warning system of a crane be bypassed? - Answer>> Only during assembly and disassembly Who is not allowed in the fall zone according to OSHA 1926 sub part cc? - Answer>> Qualified rigger What is the function of a holding valve? - Answer>> Prevents loads on cylinders from dropping and uncontrolled manner What is the maximum angle allowed between two slings on a hook? - Answer>> 90 What is the maximum angle allowed between two slings in a shackle? - Answer>> 120 What is the angle allowed to horizontal between two slings on a hook - Answer>> 45 What is the angle allowed to horizontal between two slings in a shackle - Answer>> 30 Where can you find the standard hand signals for mobile crane operation? - Answer>> OSHA subpart CC Which of the following cannot be done to the hoist line - Answer>> Splice the hoist line When directing a crane using voice signals, what must the channel being used to be? - Answer>> Dedicated