nccco mobile crane core study guide 2025

when should a tagline be used?

when rotation may be hazardous

what is cause for boom deflection?

lifting heavy loads

what describes a load applied at an angle to the vertical plane?

side loading

what are the deductions when calculating parts of line

load weight, rigging, and Ioad block

According to OSHA 1926 subpart CC, what is prohibited on the main line

splicing

what is the result of rapid hoist acceleration?

dynamic loading

when considering where to setup the crane, what would be of significant concern for the controlling entity?

ground conditions

According to ASME B30.5 what is the maximum time frame between physical exams that is required of an operator unless required by supervisor?

3 years

Acsording to OSHA subpart CC what must be done to reasonably prevent pinching/ crushing and employee?

maintain barriers to mark the equipments rotating super structure.

what prevents contact between the load block and the boom point

anti two-block device

what is an example of duty cycle operations?

dredging

what is the sum of the following deductions:

Block 1,165 rigging 120 spreader beam 480

1765

what is the minimum distance a drum flange shall extend over the top layer of rope?

½ inch

what is the term that is used to define the load plus all the rigging components, hooks, blocks, and other lifting equipment

gross load

why are load ratings modified for a mobile crane mounted on a barge?

Trim and list

A de-energized powerline is confirmed by whom?

utility owner

According to osha 1926 subpart CC who has the responsibility of ensuring the area needed to support the crane has been prepared adequately before crane arrives if there is no controlling entity?

employer with authority

How does increasing the offset of an erect jib affect the cranes capacity while mainteining the same main boom angle

it is reduced

What effect does the jib have on the cranes capacity when lifting from the main boom with jib erected.

reduces capacity by effective jib weight

When making a fist and touching the top of your hard hat what hand signal does this indicate to the operator

use main hoist

when the measured load radius falls between the radii listed in the load chart which rated capacity should be used?

use the rated load capacity for the next longer radius listed in the load chart

What is the correct way to form a choker hitch?

by wrapping around an object with one eye of the sling in the hook.

what is the most likely result of excessive side loading?

structural boom failure

when considering the angle between the rigging and the horizontal in a two leg bridle, what happens to the tension?

The higher the sling angle the lower the tension.

what is the most important consideration if the operator comes in contact with energized power lines and has to leave the crane?

Not to touch the crane and the ground at the same time.

What shall the operator do when there is a slack rope condition?

determine that the rope seated on the drum and sheaves.

according to OSHA 1926 subpart CC. What is the minimum clearance distance required to be maintained during the assembly of the crane near power lines that are under 350Kv, but the exact voltage is unknown?

20 ft

what is an indicator of core failure in rotation resistant rope?

Localized reduction in diameter

What effects do the weights of load handling devices, such as load blocks, overhaul ball and slings have.

they are considered part of the load (gross load)

When lifting loads using nylon slings, what should be avoided?

acid

according to OSHA subpart CC, what must the controlling entity ensure?

ground preparation has been provided

With arm extended to the right pointing what crane operation signal is being asked

swing and left

when would it be acceptable to use a crane for personal hoist?

When other methods create more hazards

what is not information that can be used by the operator to verify the correct load chart has been provided for a particular crane?

date of manufacture

what term is defined by the ability of the equipment and its components to withstand the stresses imposed by applying a dynamic load.

structural competence

What is the minimum number of parts line that are needed to lift the total load of 38,500 pounds?

Rope strength is 9500 pounds.

5 parts

According to asme B30.5, how frequently must operational aids be checked?

daily

When lifting a load over the corner using 360 chart, what would you produce?

higher ground pressure

According to OSHA 1926 subpart CC, table A, what is the minimum clearance distance of a cranes boom, load line or load when working near 360 Kv power lines?

25 feet

according to the current ASME B30.5, what does the term "shall" indicate?

the standard is mandatory

what is a cause of shock loading on the crane?

rapid hoist acceleration

what is the most accurate way to verify a boom length on the LMI?

actual measurement

what source should be used to determine boom tip height?

Working range diagram

According to OSHA 1926 subpart CC, when employees are engaged in hooking and unhooking and guiding loads in the fall zone, what type of hook may be permitted?

J hooks

How do you decrease the applied ground pressure under the cranes Outrigger pads or crawlers?

use timber blocking or matting

what is a temporary alternative measure when the anti two block device is not working properly?

mark the hoist cable

what is not an operator responsibility?

Ensuring availabilty of sufficient room to assemble. and disassemble a crane

gross capacity is 10,700 pounds. And total deductions are 6322 pounds. What is the net capacity?

4378 pounds

what is used to warn an operator of an approaching overload condition?

Load moment indicator (LMI)

Which factor is the most important to consider about site access?

Compaction of access (approach) roads

according to OHA 1926 subpart CC, which individual is allowed within the fall zone?

employee guiding load

An operator plans to pick gross load that weights 36,500 pounds and the Crane has a line pull of 12,920 pounds. what is the minimum parts of line required?

3

lists the rigging hitches in order from weakest to strongest hitch

Choker, vertical, basket.

What is used to determine the cranes operational quadrants?

working area (range) diagram

According to OSHA 1926 subpart CC, what is the maximum percentage of the cranes rated capacity that can be used when lifting a personnel platform?

50%

when must a dedicated spotter be required?

while traveling a crane without a load on a job site closer than 20 ft of the power lines; or when the operators visuals are hindered

what causes a two block condition

extending the boom

With the load suspended, the load radius is the horizontal distance from the center line of the vertical hoist lines to the -

center line of rotation

what is a requirement of a signal person?

Have past an oral or written test and practical test period

according to OSHA, how frequently must rigging be inspected?

prior to use

Acording to OSHA subpart CC, what action must be taken by the operator when a safety device is not in proper working order?

Equipment must be taken out of service

According to ASME 830.5, ifthe power to the crane fails during operation, what is the first action you should perform?

set all brakes and locking devices

when is the holist line on top of the boom considered part of the load?

it never is

according to ASME B 30.5, what do three audible signals made by a crane operator mean?

back up

according to ASME B 30.5, what do two audible signals made by a crane operator mean?

go forward

according to ASME B 30.5, what does audible signal made by a crane operator mean?

stop

what is the purpose of the boom angle indicator?

to indicate the angle of the cranes boom to horizontal

According to OSHA 1926 subpart CC, what must be posted at the operators cab and outside of the crane

Electrocution hazard warnings

according to OSHA 1926 subpart CC, how many randomly distibuted broken wires in rotation resistant rope are caused for replacement?

two randomly distributed broken wires in six rope diameters; or four randomly distributed broken wires in 30 rope diameters.

according to ASME B30.5, What effect does the weight of a nonstandard boom attachment have when calculating the net capacity?

deducts from the load rating

according to OSHA, whats the minimum umber of wraps of rope required on a hoist drum when the hook is in its lowest position

2

according to OSHA subpart CC, what is true regarding operational aids?

they must not be used as substitute for professional judgement by the operator.

what crane operational signal is llustrated with both hands clenched together in front of signal person.

dog everything

after taking the necessary deductions from the cranes load chart, what is the operator trying to determine?

net capacity

what is the purpose of jib?

to increase the height/reach a load to be lifted

if outriggers are set at positions that do not correspond to the load or capacity chart, the manufacturer shall be consulted. Who must be consulted if the required information is not available from the manufacturer?

qualified person

what is the correct sequence for voice signals?

Function and direction, distance and/or speed, function stop.

What is the maximum gross load that can be placed on six parts of line with a permissible line pull of 12,920 pounds?

77,520 pounds

According to OSHA 1926 subpart CC, for cranes traveling with no load, what is the minimum clearance for energized electrical lines at 55 KV?

10 feet

When should a regular lay running rope be replaced

when it has 6 broken wires randomly in one lay

What is required during crane setup?

Adequate counterweight clearance

What can dragging a load cause

Excessive side loading

According to OSHA 1926 subpart CC, at each job site, prior to hoisting employees on the personnel platform, the platform and rigging must be proof tested to what percentage?

125%

According to ASME B 30 5 which warning device automaticlly monitors: radius, load weight, and load rating?

rated capacity indicator

What is the definition of D/d ratio?

The load diameter divided by the sling diameter

When calculating the cranes net capacity, what is the correct procedure to follow if the rating listed in the capacity chart is greater then the safe working load of the wire rope?

Use the safe working load of the wire rope then make deductions

Accorcing to OSHA 1926 subpart CC, what is the minimum distance that must be rnaintained between a working crane, load, or crane line and a 115 Kv powerline?

15 feet

According to ASME B30.5, the audible signal device shall:

be within reach of the operator

According 1o OSHA 1926 subpart CC, what is the responsibility of the controlling entity?

ground conditions

When lifting a load, where is the maximum ground bearing pressure produced?

Over the corner

What must be shown on a work area chart?

quadrants of operation

net load

actual weight of the item being lifted, excluding the weight of the rigging components

gross load

sum of payload and rigging deductions

net capacity

gross capacity minus the deductions

gross capacity

Total capacity indicated on a crane's load chart.

What is a working range diagram

graphic tool that shows the crane's maximum safe lifting reach and height for different boom lengths and angles.

what is a load moment indicator?

to warn you when you're close to overloading