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NCCCO Articulating Crane study materials
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NCCCO Articulating Crane practice questions

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Question 1Site and equipment inspection and setup

Before an articulating crane begins lifting on a new jobsite, which condition must be verified about the surface where the outrigger floats or pads will rest?

  1. The surface slopes slightly away from the machine to shed rainwater
  2. The surface is asphalt so the pads can be pinned to it
  3. The surface is covered with loose gravel to improve drainage under the pads
  4. The surface is level and strong enough to carry the outrigger load without settling Correct answer.

Explanation

Outrigger pads must bear on ground that is both level enough to keep the crane within its rated capacity and firm enough that the pads will not sink or shift under load. Soft, uncompacted, or sloped ground can allow the crane to tip or the boom to move unexpectedly. Loose material or deliberate slope under a pad works against stability rather than helping it.

Question 2Site and equipment inspection and setup

When the load chart for an articulating crane shows capacities for both 'outriggers fully extended' and 'outriggers retracted,' what determines which column applies?

  1. The weight of the load being lifted relative to the boom length
  2. The boom angle shown on the inclinometer at the moment of the lift
  3. The wind speed measured at the boom tip during the lift
  4. The actual configuration of the outriggers as set up at the time of the lift Correct answer.

Explanation

Load charts publish separate capacity ratings for each outrigger configuration because stability and structural limits differ between them. The operator must match the chart column to how the outriggers are actually deployed, not to some other variable. Using a fully-extended rating while running outriggers partially or not at all can overload the crane.

Question 3Site and equipment inspection and setup

What is the primary purpose of deploying outriggers with flotation pads on an articulating crane before a lift?

  1. To spread the load over a larger area and improve stability Correct answer.
  2. To align the crane frame with the direction of travel
  3. To increase the lifting speed of the winch during the pick
  4. To reduce the hydraulic pressure needed to raise the boom

Explanation

Outriggers with floats increase the effective bearing area and widen the crane's support base, which improves stability and reduces ground pressure. This is why load charts generally allow higher capacities when outriggers are fully extended. Floats do not change winch speed or boom hydraulic demand.

Question 4Site and equipment inspection and setup

An operator is setting up an articulating crane near a freshly backfilled excavation. Which action best addresses the risk of ground collapse under an outrigger?

  1. Lower the outrigger only partway so less load reaches the backfill
  2. Position the outrigger pad well back from the edge onto undisturbed or properly compacted ground Correct answer.
  3. Place a single layer of plywood over the backfill to bridge the void
  4. Set the outrigger and monitor it visually during the lift

Explanation

Backfilled trenches and excavations can contain voids or loose material that will not support outrigger loads. Keeping pads back on undisturbed or properly compacted ground avoids the hazard. Partial deployment or thin bridging material does not provide reliable bearing capacity.

Question 5Site and equipment inspection and setup

During a pre-lift inspection, an operator finds a hydraulic hose on an outrigger cylinder with deeply cracked, abraded outer cover but no visible leak. What is the appropriate response?

  1. Reduce the load to half capacity and complete the lift
  2. Remove the crane from service until the hose is evaluated and replaced as needed Correct answer.
  3. Continue operating and recheck the hose after the shift
  4. Wrap the damaged area with tape and proceed with the lift

Explanation

A deeply damaged hose cover can indicate loss of reinforcement, and a burst under load can drop the outrigger and destabilize the crane. Damaged hydraulic components must be evaluated and corrected before the crane is returned to service. Taping or derating the load does not restore the hose's integrity.

Question 6Site and equipment inspection and setup

Which item should be verified about the crane's level indicator before beginning a lift with outriggers set?

  1. That the indicator reads level regardless of outrigger position
  2. That the indicator is mounted where the operator can see it from the cab
  3. That the bubble or indicator shows the crane is within the level tolerance stated by the manufacturer Correct answer.
  4. That the indicator was calibrated within the last 30 days

Explanation

Load charts are based on the crane being level within the manufacturer's stated tolerance, and an out-of-level condition reduces capacity in the downhill direction. The operator must confirm the level indicator shows the crane within that tolerance before lifting. The indicator's mounting location or a fixed calibration interval is not the governing requirement.

Question 7Site and equipment inspection and setup

Why must all outrigger beams be extended and pinned, or otherwise secured, according to the manufacturer's procedure before lifting?

  1. To allow the crane to be operated from the remote control station
  2. To keep the crane from rolling during transport between sites
  3. To ensure the outrigger can carry its rated load without the beam creeping or retracting Correct answer.
  4. To reduce the overall width of the crane for road travel

Explanation

Outrigger beams must be positively secured in the deployed position so they cannot creep or retract under load, which would shift the crane's support and could cause a tip-over. The manufacturer's pinning or locking procedure is part of the rated setup. Transport securing and remote-control operation are unrelated to this requirement.

Question 8Site and equipment inspection and setup

An operator plans a lift on a slope steeper than the manufacturer allows for setup. What is the correct course of action?

  1. Extend the downhill outriggers further to compensate for the slope
  2. Lift only with the boom pointed uphill
  3. Relocate the crane to ground that can be leveled within the manufacturer's tolerance Correct answer.
  4. Chock the wheels and lift at reduced capacity

Explanation

Crane load charts assume the machine is set up within a specified level tolerance; exceeding it invalidates the ratings and increases tip-over risk. The accepted remedy is to move to ground where the crane can be leveled properly, using cribbing or pads as the manufacturer permits. Compensating with outrigger extension or boom direction does not restore rated capacity.

Question 9Site and equipment inspection and setup

What should an operator check regarding overhead hazards before raising an articulating crane boom at a new setup location?

  1. That the boom will not contact energized power lines or other overhead obstructions Correct answer.
  2. That the tires are inflated to the correct pressure
  3. That the crane's horn is functioning properly
  4. That the remote control batteries are fully charged

Explanation

Overhead power lines and structures are a leading cause of serious crane incidents, so the operator must identify them and establish the required clearances before booming up. Site inspection for overhead hazards is part of setup, not an afterthought. Horn function, tire pressure, and remote batteries are separate checks that do not address overhead clearance.

Question 10Site and equipment inspection and setup

Which document should an operator consult to determine the maximum capacity of an articulating crane in a specific boom configuration and outrigger setup?

  1. The crane's registration certificate
  2. The crane's maintenance log
  3. The jobsite's daily safety briefing form
  4. The manufacturer's load rating chart for that crane model Correct answer.

Explanation

The manufacturer's load rating chart lists capacities for each boom length, radius, and outrigger configuration, and it is the controlling document for safe lifting. Operators must be able to read and apply the chart for the crane in use. Maintenance logs, briefing forms, and registration documents do not contain capacity ratings.

Question 11Site and equipment inspection and setup

An operator notices the outrigger pad is sinking into soft soil during initial loading. What is the safest response?

  1. Add cribbing under the pad or relocate to firmer ground, then re-level before lifting Correct answer.
  2. Continue the lift and watch the pad closely
  3. Increase engine speed to raise the outrigger faster
  4. Retract that outrigger slightly to reduce pressure on the soil

Explanation

A pad sinking under load shows the ground cannot carry the outrigger force, and continued lifting risks a tip-over. The correct response is to stop, improve bearing with proper cribbing or move to firmer ground, and re-level the crane. Retracting an outrigger or speeding the outrigger action does not fix the bearing problem.

Question 12Site and equipment inspection and setup

What is the purpose of a pre-operational walk-around inspection of an articulating crane at the start of a shift?

  1. To identify defects such as leaks, damaged components, or missing pins before operation Correct answer.
  2. To verify that the operator's certification card is current
  3. To document the crane's fuel consumption for the day
  4. To confirm the crane's hourly rental rate with the site manager

Explanation

A walk-around inspection is intended to find visible defects, leaks, structural damage, loose or missing pins, and other unsafe conditions before the crane is put to work. Catching these early prevents failures during a lift. Fuel accounting, rental rates, and certification records are administrative matters outside the walk-around's purpose.

Question 13Site and equipment inspection and setup

When setting up an articulating crane on a steel deck or bridge structure, what should the operator confirm about the structure before deploying outriggers?

  1. That the structure is rated to support the outrigger loads imposed by the crane Correct answer.
  2. That the deck surface is free of standing water
  3. That the crane's boom can reach the far edge of the deck
  4. That the deck has been painted within the last year

Explanation

Elevated decks, bridge structures, and suspended slabs have finite load limits, and outrigger point loads can be far higher than the crane's own weight. The operator must confirm the structure can carry those loads, often with engineering input, before setting up. Paint condition, boom reach, and surface water are not the governing structural question.

Question 14Site and equipment inspection and setup

Which condition on a wire rope used with an articulating crane requires the crane to be taken out of service for evaluation?

  1. The rope has a slight uniform sheen from normal use
  2. The rope shows broken wires, kinking, or crush damage Correct answer.
  3. The rope is lightly oiled from routine lubrication
  4. The rope is routed through the sheave as designed

Explanation

Broken wires, kinking, crushing, and similar mechanical damage reduce rope strength and are removal criteria under inspection standards. The crane should be taken out of service until the rope is evaluated and replaced if needed. Normal lubrication, a uniform sheen, and correct routing are not defects.

Question 15Site and equipment inspection and setup

An operator is preparing to lift near a public sidewalk. Which setup consideration best manages the risk to people below?

  1. Sound the horn once before each lift to warn pedestrians
  2. Position the crane so the load and boom do not pass over the sidewalk, and barricade the area as needed Correct answer.
  3. Have a bystander hold the tag line to keep the load steady
  4. Lift only during the busiest part of the day when people can see the crane

Explanation

Keeping the load and boom from traveling over people and barricading the swing area are the primary controls for protecting the public. Warnings and tag lines do not substitute for keeping people out from under the load. Scheduling lifts during peak pedestrian traffic increases exposure rather than reducing it.

Question 16Site and equipment inspection and setup

What is the purpose of installing wheel chocks or setting the parking brake before deploying outriggers on a truck-mounted articulating crane?

  1. To keep the outrigger pads from contacting the ground
  2. To allow the crane to be operated while the truck is moving
  3. To prevent the chassis from rolling or shifting while the outriggers are loaded Correct answer.
  4. To reduce the crane's overall lifting capacity to a safer level

Explanation

Chocks and the parking brake keep the carrier from rolling or shifting as the outriggers take load and the suspension unloads. Movement of the chassis during setup or lifting can destabilize the crane. Chocks do not affect pad contact, capacity ratings, or permit operation while traveling.

Question 17Site and equipment inspection and setup

During setup, an operator finds that one outrigger cannot be fully extended because of a wall. What is the correct approach?

  1. Use the fully extended outrigger rating since the other three outriggers are fully out
  2. Extend the remaining outriggers further to make up for the short one
  3. Operate the crane only in the direction of the short outrigger
  4. Use the crane's load chart for the actual outrigger configuration and do not exceed those reduced ratings Correct answer.

Explanation

When an outrigger cannot be fully deployed, the crane must be rated according to the configuration actually achieved, which is typically a lower capacity column or may prohibit lifting on that side. The operator must not use the fully extended ratings. Compensating with the other outriggers or pointing the boom a certain way does not restore the missing capacity.

Question 18Site and equipment inspection and setup

Which factor most directly determines the size and type of cribbing needed under an articulating crane's outrigger pad?

  1. The length of the boom being used for the lift
  2. The color of the outrigger pad
  3. The outrigger load and the bearing capacity of the soil beneath Correct answer.
  4. The number of employees on the crew that day

Explanation

Cribbing must spread the outrigger point load over enough area that the soil's bearing capacity is not exceeded. The required cribbing size therefore depends on the load and the ground conditions. Pad color, boom length, and crew size do not determine bearing requirements.

Question 19Site and equipment inspection and setup

What should be done if the crane's level indicator is missing or broken during setup?

  1. Rely on the outrigger cylinder pressures to confirm level
  2. Lift at half capacity and replace the indicator at the next service interval
  3. Use a carpenter's level on the frame as a temporary substitute and repair the indicator promptly Correct answer.
  4. Proceed using the operator's sense of balance

Explanation

Leveling is a load-chart requirement, so a missing or broken indicator must not be ignored. A reliable temporary means of checking level, such as a spirit level on a suitable frame surface, allows setup to continue while the indicator is repaired promptly. Guessing or derating does not verify the crane is within tolerance.

Question 20Site and equipment inspection and setup

An operator is inspecting an articulating crane's boom before a shift and finds a fresh crack in a weld on the boom structure. What is the appropriate action?

  1. Fill the crack with sealant to prevent moisture intrusion
  2. Remove the crane from service and have the crack evaluated and repaired per the manufacturer Correct answer.
  3. Continue lifting at reduced capacity until the end of the week
  4. Paint over the crack so it can be monitored later

Explanation

Cracks in boom welds are structural defects that can propagate and lead to catastrophic failure under load. The crane must be removed from service and the defect evaluated and repaired according to the manufacturer's guidance. Painting, sealing, or derating does not restore structural integrity.

Question 21Site and equipment inspection and setup

Why should the crane's outriggers be set on pads rather than directly on the ground when the surface is firm but uneven?

  1. Pads make the outriggers extend faster
  2. Pads distribute load and help bridge minor surface irregularities Correct answer.
  3. Pads allow the crane to be operated without a load chart
  4. Pads are required to keep the outrigger cylinders lubricated

Explanation

Pads spread the outrigger load over a larger area and help bridge small irregularities so the beam is not point-loaded on a high spot. This improves stability on firm but uneven ground. Pads do not affect outrigger speed, cylinder lubrication, or the requirement to use the load chart.

Question 22Site and equipment inspection and setup

An articulating crane is set up next to a trench with a spoil pile on the opposite side. What is the most significant stability concern?

  1. The trench and spoil pile can reduce ground support near the outriggers and cause a slide or collapse Correct answer.
  2. The trench may collect rainwater and rust the outrigger pads
  3. The spoil pile may block the operator's view of the load chart
  4. The spoil pile may attract insects to the jobsite

Explanation

Trench edges and spoil piles indicate disturbed or surcharged ground that may not support outrigger loads and can slide or collapse. The crane should be set back a safe distance based on soil conditions and engineering guidance. Insects, view obstruction, and rust are minor concerns compared with ground failure.

Question 23Site and equipment inspection and setup

Which practice best ensures that the crane's outriggers remain effective throughout a long shift of repeated lifts?

  1. Retract the outriggers between lifts to relieve stress
  2. Recheck the level indicator and outrigger pads periodically, especially after ground conditions change Correct answer.
  3. Lower the outriggers only until they touch the ground, without loading them
  4. Loosen the outrigger beam pins slightly to allow for thermal expansion

Explanation

Ground can settle and pads can shift during a shift, particularly after rain or nearby excavation, so periodic rechecks of level and pad condition are needed. Outriggers must remain fully deployed and loaded as set up. Retracting between lifts, loosening pins, or leaving outriggers unloaded defeats the setup.

Question 24Site and equipment inspection and setup

What is the operator's responsibility regarding the crane's anti-two-block device during setup?

  1. Remove it if the crane is equipped with a load moment indicator
  2. Test it only at the end of the shift
  3. Disable it when lifting close to the boom tip
  4. Verify it is installed, undamaged, and functioning before lifting Correct answer.

Explanation

The anti-two-block device prevents the hook block from contacting the boom tip and must be verified as installed and functional before lifting. It is a required safety device and must not be disabled or removed. Testing it after the shift does not protect the lifts performed earlier.

Question 25Site and equipment inspection and setup

An operator is setting up on a site where the only available position places the outrigger pads on a buried utility vault cover. What is the best course of action?

  1. Place a single sheet of plywood over the vault and proceed
  2. Verify the vault can support the outrigger load or relocate the crane to a position that avoids it Correct answer.
  3. Assume the vault is designed for vehicle traffic and proceed
  4. Set up on the vault cover and lift at reduced capacity

Explanation

Buried vaults and utility covers may be hollow or not rated for concentrated outrigger point loads, and collapse under a pad can tip the crane. The operator must confirm the vault's capacity or move to a position that avoids it. Assuming traffic rating or adding one sheet of plywood does not establish the needed capacity.

Question 26Site and equipment inspection and setup

Before the first lift of the day, an operator inspects the articulating crane and finds the load moment indicator (LMI) displaying a fault code. What is the correct action?

  1. Operate in manual mode using the boom angle indicator
  2. Zero the display and continue lifting at reduced capacity
  3. Log the code and lift only loads under half of rated capacity
  4. Place the crane out of service until the fault is corrected Correct answer.

Explanation

The load moment indicator is a rated-capacity safety device, and any fault, error code, or bypassed function means the crane cannot be used for lifting until it is repaired and verified. Rated capacity limits cannot be substituted with guesswork or reduced loads because the device's function is to warn and stop overloads. The operator must remove the crane from service and report the fault.

Question 27Site and equipment inspection and setup

An operator is preparing to set up an articulating crane on a site where the ground surface is level but consists of loose fill. Which check best confirms the ground can support the outrigger loads?

  1. Confirm the surface is dry to the touch
  2. Check that the crane's tires remain inflated to spec
  3. Verify the outrigger pads are the manufacturer's size
  4. Assess the bearing capacity and use cribbing to spread load Correct answer.

Explanation

Outrigger loading is concentrated, so the ground must have adequate bearing capacity or the load must be spread with properly sized cribbing. Loose fill can consolidate or shift under load even on level ground, so capacity assessment and load spreading are the controlling checks. Surface dryness and tire pressure do not address bearing strength.

Question 28Site and equipment inspection and setup

During setup, an operator must position an articulating crane so the boom will swing over a live traffic lane. Which control measure is most appropriate?

  1. Restrict lifts to the lightest loads on the capacity chart
  2. Complete the lifts quickly during a low-traffic window
  3. Rely on the crane's swing alarm to warn drivers
  4. Coordinate a traffic control plan with barricades and flaggers Correct answer.

Explanation

Swinging over a live traffic lane exposes the public to falling loads and swing hazards, so the exposure must be controlled by separating traffic from the work zone. A traffic control plan with barricades, signage, and flaggers is the standard means of doing that. Alarms and speed do not prevent a vehicle from entering the fall zone.

Question 29Site and equipment inspection and setup

An operator notices the crane's bubble level is out of adjustment, showing level when the crane is actually on a slope. What is the correct response before lifting?

  1. Use the boom angle indicator to estimate level
  2. Continue if the slope is under five degrees
  3. Compensate by adding cribbing under the high side
  4. Level the crane by another reliable means or take it out of service Correct answer.

Explanation

The level indicator is the reference the operator uses to confirm the crane is within the manufacturer's setup tolerance, so a known-inaccurate indicator cannot be trusted. The crane must be leveled using a reliable method, or the indicator repaired, before lifting. Estimating level from boom angle or guessing a slope threshold does not satisfy the setup requirement.

Question 30Site and equipment inspection and setup

An operator is planning a lift where the load will be picked from the side of the carrier rather than over the front or rear. What setup information must be confirmed before making that lift?

  1. That the capacity chart permits the boom position and the outriggers are fully deployed Correct answer.
  2. That the carrier's tires are on firm pavement
  3. That the wind is below the crane's travel speed limit
  4. That the load is rigged with a single-leg sling

Explanation

Side loading is often restricted or rated lower than over-front or over-rear lifting, so the operator must confirm the specific boom position and quadrant on the capacity chart. The chart's ratings assume the outriggers are fully deployed as specified. Tire condition, sling type, and travel speed do not establish the permitted lifting configuration.

Question 31Site and equipment inspection and setup

Which item belongs on a pre-shift inspection of an articulating crane's hydraulic system before setup begins?

  1. The hydraulic fluid level and visible leaks at hoses and cylinders Correct answer.
  2. The date the crane was last washed
  3. The color of the hydraulic reservoir sight glass
  4. The brand of hydraulic oil used at the last service

Explanation

Pre-shift inspection of the hydraulic system centers on fluid level and on leaks, chafing, or damage at hoses, fittings, and cylinders, since a hydraulic failure during a lift can drop the boom or load. Cosmetic details and oil branding do not indicate system integrity. Fluid level and leak checks are the items that reveal a condition requiring correction before setup.

Question 32Site and equipment inspection and setup

After setting outriggers on a paved lot, an operator sees the crane's frame has settled slightly and the level indicator is now off-center. What should be done?

  1. Re-level the crane and recheck the outrigger pads for sinking Correct answer.
  2. Lower the outriggers further until the frame stops moving
  3. Continue lifting because the outriggers are down
  4. Reduce boom length to compensate for the tilt

Explanation

Settlement after setup indicates the pads are not holding, which changes the crane's level condition and can shift load reactions. The operator must stop, re-level, and investigate whether pads are sinking or cribbing is inadequate. Continuing or forcing the outriggers deeper does not correct an unstable support.

Question 33Site and equipment inspection and setup

What is the primary reason an operator verifies the crane's outrigger pads are positioned on stable, level footing rather than partially on a curb edge?

  1. To make the outrigger beams easier to retract
  2. To improve the appearance of the setup for inspectors
  3. To prevent the pad from tipping or sliding off the edge under load Correct answer.
  4. To keep the pads clean and free of debris

Explanation

A pad that is only partly supported can tilt or slide when the outrigger load is applied, causing sudden loss of support and crane movement. Full contact on stable footing keeps the reaction force distributed as the manufacturer intended. Cleanliness, retraction ease, and appearance are not structural concerns.

Question 34Site and equipment inspection and setup

An operator is setting up near an excavation and must choose between two positions. Position A places the outriggers well back from the edge; Position B places them close to the edge on the same soil. Which reasoning correctly guides the choice?

  1. Position A is better because outrigger loads near an excavation edge can destabilize the slope Correct answer.
  2. Position B is acceptable if the spoil pile is on the far side
  3. Position B is better because closer placement shortens the boom reach
  4. Both are equal if the crane is level at each position

Explanation

Outrigger reactions add surcharge loading to the soil behind an excavation, which can reduce slope stability and cause the edge to fail. Keeping the outriggers back from the edge reduces that surcharge and the risk of the crane sliding or tipping into the cut. Level condition alone does not address slope stability.

Question 35Site and equipment inspection and setup

Which practice best ensures outriggers stay effective during a long shift of repeated lifts?

  1. Retract the outriggers between lifts to relieve stress
  2. Increase engine speed to hold hydraulic pressure in the outriggers
  3. Recheck pads, level, and outrigger security periodically through the shift Correct answer.
  4. Loosen the outrigger lock pins to allow the beams to float

Explanation

Soil consolidation, pad movement, and vibration from repeated lifts can change the setup over time, so periodic checks of pads, level, and outrigger security are needed. Retracting outriggers, raising hydraulic pressure, or defeating lock pins would undermine the support rather than maintain it.

Question 36Site and equipment inspection and setup

Before raising the boom at a new setup, what should the operator confirm about the crane's anti-two-block device?

  1. That it is powered off to avoid nuisance alarms
  2. That it is installed, functional, and correctly adjusted Correct answer.
  3. That its alarm volume is set to the lowest level
  4. That it has been bypassed for the first lift only

Explanation

The anti-two-block device prevents the load block from contacting the boom tip, which can cause rope failure and a dropped load, so it must be present, working, and adjusted before lifting begins. Disabling or bypassing it removes that protection. Alarm volume is not the safety concern.

Question 37Site and equipment inspection and setup

An operator is setting up an articulating crane on a barge deck. Which setup consideration is most specific to this floating platform?

  1. Verifying the barge's fuel level for the return trip
  2. Checking that the barge's navigation lights are working
  3. Confirming the deck is painted with non-skid coating
  4. Confirming the barge's list and trim are stable and the crane is secured to the deck Correct answer.

Explanation

On a floating platform, crane capacity and stability depend on the barge remaining level and stable, and the crane must be secured so it cannot shift with vessel motion. List, trim, and securing are the setup items unique to this condition. Navigation lights, fuel, and deck coating do not affect lifting stability.

Question 38Site and equipment inspection and setup

What is the correct way to handle the outrigger float pads when the crane manufacturer specifies them for a particular model?

  1. Install and secure them as specified before deploying the outriggers Correct answer.
  2. Use them only when the ground is soft
  3. Substitute wooden blocks of similar thickness
  4. Leave them off when lifting light loads

Explanation

When the manufacturer specifies float pads, the capacity ratings assume they are installed, so they must be fitted and secured before the outriggers are deployed. Omitting or substituting them changes the load distribution and may invalidate the ratings. Ground condition or load weight is not a reason to deviate.

Question 39Site and equipment inspection and setup

An operator finds the crane's boom rest or boom cradle damaged so the boom cannot be securely stowed. How does this affect setup and operation?

  1. It can be ignored if the crane travels only short distances
  2. The boom may be stowed with a strap tied around it
  3. The crane should not be operated until the cradle is repaired Correct answer.
  4. It has no effect because the boom is raised during lifting

Explanation

The boom cradle supports and secures the boom during transport and stowage, and damage means the boom could shift or drop while the carrier is moving. The crane should be removed from service until the cradle is repaired. Improvised strapping or short travel distances do not provide the engineered support the cradle is designed for.

Question 40Site and equipment inspection and setup

Which condition discovered during a setup inspection of an articulating crane's structural welds requires the crane to be removed from service?

  1. Paint peeling on a non-structural cover panel
  2. A visible crack in a weld on a primary load-bearing member Correct answer.
  3. Surface rust on a handrail
  4. A missing decal on the outrigger beam

Explanation

Cracks in welds on primary load-bearing members indicate possible structural failure and require the crane to be taken out of service for evaluation and repair. Cosmetic paint, surface rust on non-structural parts, and missing decals are maintenance items but do not indicate loss of structural integrity.

Question 41Load charts and capacity determination

On an articulating crane load chart, the rated capacity listed for a given radius and boom configuration already accounts for which of the following?

  1. The weight of the crane's lifting attachments and any deductions noted on the chart Correct answer.
  2. The weight of the operator and fuel in the tank
  3. The wind load acting on the suspended load
  4. The rigging weight added by the signal person

Explanation

Manufacturer load charts state rated capacities that already reflect the crane's own boom, jib, and attachment weights, and any required deductions are printed on the chart. The operator, fuel, and rigging must be handled per the chart's notes and general capacity rules, not assumed built in. Always read the chart notes before applying a listed value.

Question 42Load charts and capacity determination

An articulating crane chart shows a capacity of 4,200 lb at a 10 ft radius and 3,100 lb at a 15 ft radius. For a pick at 12 ft radius, what capacity should the operator use?

  1. The value at the next longer listed radius, 3,100 lb Correct answer.
  2. The capacity at the maximum radius shown on the chart
  3. 4,200 lb, the higher of the two listed values
  4. An average of the two listed values, 3,650 lb

Explanation

When the actual radius falls between two charted radii, the operator must use the capacity shown for the next longer (greater) radius. Interpolating upward or averaging would overstate capacity and is not permitted. Using 3,100 lb keeps the lift within the conservative charted limit.

Question 43Load charts and capacity determination

What does the load radius on an articulating crane load chart measure?

  1. The horizontal distance from the rotation center to the center of gravity of the load Correct answer.
  2. The vertical height from ground to the boom tip
  3. The length of boom paid out from the boom pivot
  4. The distance from the outrigger pad to the load hook

Explanation

Radius is measured horizontally from the crane's rotation center to the vertical line through the load's center of gravity. It is not boom length, height, or outrigger distance. Because radius grows as the boom is extended or lowered, it must be measured for each lift condition.

Question 44Load charts and capacity determination

A crane's load chart is marked for a specific outrigger spread. If the outriggers are extended only partway, what is the correct action?

  1. Use the chart for the full outrigger spread since the load is light
  2. Rely on the boom angle indicator instead of the chart
  3. Reduce the chart capacity by ten percent and proceed
  4. Use the chart that corresponds to the actual outrigger configuration, if one is provided Correct answer.

Explanation

Capacity is tied to the crane's support configuration, so the operator must use the chart matching the actual outrigger spread. If no chart exists for the partial configuration, the lift cannot proceed on that basis. A percentage rule of thumb does not replace the manufacturer's chart.

Question 45Load charts and capacity determination

Where should the operator find the load chart applicable to the crane being operated?

  1. From the load weight ticket provided by the shipper
  2. In the crane's operator manual or on the chart placard affixed to the crane Correct answer.
  3. From the rigging supplier's catalog
  4. On a generic wall chart in the site trailer

Explanation

The manufacturer's load chart for that specific crane model and configuration is provided in the manual or on the machine. Generic charts and supplier documents do not reflect the crane's actual ratings. Using the correct chart is a basic prerequisite for any capacity determination.

Question 46Load charts and capacity determination

An articulating crane is set up on a firm, level surface. What effect does this have on the use of the load chart?

  1. It allows any boom configuration to be used at full capacity
  2. It removes the need to account for load weight
  3. It permits use of the chart ratings as published for that configuration Correct answer.
  4. It allows the operator to exceed chart values by a small margin

Explanation

Published chart ratings assume the crane is set up level on a supporting surface adequate for the loads involved. Meeting those conditions lets the operator apply the chart as written. It never authorizes exceeding the chart or skipping load weight checks.

Question 47Load charts and capacity determination

If a load chart lists a capacity for a boom with a jib attached and a different capacity without the jib, which value applies when the jib is mounted?

  1. The higher of the two values
  2. Either value, chosen by the operator
  3. The value for the bare boom, since the jib carries no load
  4. The value listed for the configuration with the jib attached Correct answer.

Explanation

Attachments change the crane's geometry and weight, so the chart value for the actual configuration must be used. With a jib mounted, the jib configuration rating governs even if the jib is not carrying the load. Selecting the higher value would overstate capacity.

Question 48Load charts and capacity determination

Which item must be added to the load when comparing against the rated capacity?

  1. The weight of the hook block and all rigging used to attach the load Correct answer.
  2. The weight of the outrigger floats
  3. The weight of the crane's hydraulic fluid
  4. The weight of the counterweight installed by the manufacturer

Explanation

Gross load includes the load plus the hook block, slings, spreaders, and any other rigging below the boom tip. Manufacturer-installed counterweight and crane fluids are already addressed by the chart. Only items suspended from the crane add to the load being compared to capacity.

Question 49Load charts and capacity determination

A chart lists 5,000 lb capacity at a 10 ft radius. The load weighs 4,300 lb and the rigging and hook block weigh 600 lb. What is the correct conclusion?

  1. The lift is acceptable if the boom is kept above 45 degrees
  2. The lift is acceptable because rigging is never counted
  3. The lift exceeds capacity because gross load is 4,900 lb, leaving no margin and requiring review Correct answer.
  4. The lift is acceptable because the load alone is under 5,000 lb

Explanation

Gross load is the load plus rigging and hook block, here 4,900 lb against a 5,000 lb rating. That leaves only 100 lb of margin, which is effectively at the limit and should be reviewed before proceeding. Capacity comparisons must always use gross load, not the bare load weight.

Question 50Load charts and capacity determination

An operator must pick a load at a radius greater than the largest radius shown on the load chart. What is the correct course of action?

  1. Extrapolate the chart curve to estimate capacity
  2. Do not make the lift; the crane is not rated beyond the charted range Correct answer.
  3. Reduce radius by swinging the load closer after it is lifted
  4. Proceed if the load is under half the last charted value

Explanation

A load chart defines the crane's rated range, and capacities beyond the last charted radius are not established. Extrapolating or guessing a value has no manufacturer basis and is unsafe. The lift must be replanned within the charted range or with different equipment.