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CT Crane Operator practice questions

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Question 1Occupational Safety and Health Regulations and Standards for Hoisting Equipment

Under OSHA's sling standard, what is the maximum included angle for a single-leg vertical hitch when the load is balanced directly beneath the hook?

  1. 45 degrees
  2. 0 degrees, because a vertical hitch has no included angle Correct answer.
  3. 120 degrees
  4. 90 degrees

Explanation

A single-leg vertical hitch hangs straight down, so the included angle between the load line and vertical is zero. Horizontal force increases only when legs are inclined, which is why rated capacity is reduced for angled hitches. The other values describe sling angles that require capacity derating.

Question 2Occupational Safety and Health Regulations and Standards for Hoisting Equipment

A crane is operating within 10 feet of a 50 kV overhead power line. Under OSHA's crane standard, which action is required before the operator may proceed?

  1. De-energize and visibly ground the line, or maintain the required minimum clearance Correct answer.
  2. Reduce load to half of rated capacity
  3. Sound the horn continuously while slewing
  4. Proceed if a signal person watches the line

Explanation

For lines over 50 kV, the minimum approach distance is greater than the 10-foot table value for lower voltages, and OSHA requires the line be de-energized and grounded or the required clearance maintained. A dedicated spotter does not authorize encroachment inside the minimum distance. Load reduction and horn use do not address electrical hazard.

Question 3Occupational Safety and Health Regulations and Standards for Hoisting Equipment

What is the primary purpose of the anti-two-block device on a lattice-boom crane?

  1. Limit boom angle during travel
  2. Measure wind speed at the boom head
  3. Record load moment history
  4. Prevent the load block from contacting the boom tip Correct answer.

Explanation

The anti-two-block device detects and stops hoisting before the load block or headache ball contacts the boom tip, preventing rope damage and dropping the load. It is a hoist-limit safety function, not a boom angle or load-moment instrument. Its purpose is preventing contact between block and boom tip.

Question 4Occupational Safety and Health Regulations and Standards for Hoisting Equipment

Before lifting a load whose weight is not marked, what does OSHA require the operator to do?

  1. Assume the load is within capacity if the boom is short
  2. Ask the rigger to sign a waiver
  3. Determine the load weight by calculation or weighing before the lift Correct answer.
  4. Estimate weight by lifting slowly and observing deflection

Explanation

The crane standard requires the operator to know the weight of the load before hoisting, and if it is unknown, the weight must be determined by calculation or weighing. Estimating by feel or assuming capacity is not compliant. A waiver does not satisfy the requirement to determine load weight.

Question 5Occupational Safety and Health Regulations and Standards for Hoisting Equipment

Which document must be available at the worksite and reviewed by the operator before operating a crane?

  1. The site safety orientation roster
  2. The crane rental invoice
  3. The project's concrete pour schedule
  4. The manufacturer's operator manual and load charts for the configuration in use Correct answer.

Explanation

OSHA requires the operator manual and applicable load charts to be accessible, and the operator must follow the manufacturer's rated capacities for the actual configuration. Other site documents do not define the crane's rated capacity. Capacity depends on boom length, radius, and counterweight as shown in the charts.

Question 6Occupational Safety and Health Regulations and Standards for Hoisting Equipment

A crane's load chart is rated for a specific outrigger spread, but the outriggers are only partially extended. What is the correct action?

  1. Use the chart capacity for the fully extended position
  2. Use the manufacturer's capacity for the actual outrigger configuration or do not lift Correct answer.
  3. Extend only the outriggers on the load side
  4. Reduce capacity by 10 percent as a rule of thumb

Explanation

Rated capacities are configuration-specific, and the operator must use the chart for the actual outrigger spread or not proceed. There is no universal percentage derating for partial extension. Extending only load-side outriggers creates an unbalanced and unsafe condition.

Question 7Occupational Safety and Health Regulations and Standards for Hoisting Equipment

What is the minimum required frequency for documented periodic crane inspections under OSHA's general crane standard?

  1. Annually, with additional inspections after certain events Correct answer.
  2. Every five years
  3. Monthly
  4. Daily before each shift

Explanation

OSHA requires a comprehensive periodic inspection at least annually, plus inspections after modifications, repairs, or significant events such as overturning or contact with power lines. Daily inspections are a separate pre-shift requirement. The annual periodic inspection must be documented.

Question 8Occupational Safety and Health Regulations and Standards for Hoisting Equipment

How does a load moment indicator differ from a rated capacity limiter on a telescopic boom crane?

  1. Only the RCL is required on lattice booms
  2. The LMI only measures boom angle while the RCL measures hoist line speed
  3. The LMI replaces the need for load charts
  4. The LMI computes load moment and warns or stops operation, while the RCL is a function that limits capacity Correct answer.

Explanation

A load moment indicator senses load, radius, and boom geometry to compute the moment and warn or stop the crane before capacity is exceeded. A rated capacity limiter is the control function that enforces the limit. Neither replaces the manufacturer's load charts.

Question 9Occupational Safety and Health Regulations and Standards for Hoisting Equipment

A tag line is being used to control a load during a lift. What does OSHA require regarding its use?

  1. Tag lines may be used to pull the load beyond the rated radius
  2. Tag lines should be used to control rotation and must not be wrapped around the hand or body Correct answer.
  3. Tag lines must be attached to the hook
  4. Tag lines replace the need for a signal person

Explanation

Tag lines control load rotation and swing but must be handled so the worker is not pulled into the load or caught in a bight. Wrapping a line around the hand or body is prohibited. Tag lines must not be used to pull loads outside the rated radius, and they do not replace a signal person.

Question 10Occupational Safety and Health Regulations and Standards for Hoisting Equipment

What is the purpose of a swing radius barricade around a crane's rotating superstructure?

  1. To keep personnel out of the area where the counterweight swings Correct answer.
  2. To support the outrigger floats
  3. To provide an anchor for tag lines
  4. To mark the crane's maximum lifting radius

Explanation

The swing radius barricade keeps workers clear of the rotating counterweight and superstructure, which can strike or crush anyone in the path. It is a personnel protection measure, not a lifting radius marker or outrigger support. Barricades must be maintained throughout operation.

Question 11Occupational Safety and Health Regulations and Standards for Hoisting Equipment

When must a crane operator use a qualified signal person?

  1. Only during night operations
  2. Only when the operator's view of the load is obstructed or the operator cannot judge distance Correct answer.
  3. Only when lifting loads over 5 tons
  4. Only when a tag line is used

Explanation

A signal person is required when the point of operation is not in full view of the operator or when the operator cannot judge distance or the load's position. The requirement is based on visibility, not load weight or time of day. Tag lines do not eliminate the need for signals.

Question 12Occupational Safety and Health Regulations and Standards for Hoisting Equipment

Which condition requires the operator to stop operations and lower the load immediately?

  1. The boom angle indicator reads 45 degrees
  2. Wind gusts exceed the manufacturer's stated limit for the load being handled Correct answer.
  3. A coworker waves from outside the barricade
  4. The load chart is laminated

Explanation

Manufacturers specify maximum wind speeds for crane operation, often reduced for loads with large sail area. When the limit is exceeded, the operator must stop and secure the load. A wave from outside the barricade and chart lamination are not stopping conditions, and 45 degrees is a normal boom angle.

Question 13Occupational Safety and Health Regulations and Standards for Hoisting Equipment

According to OSHA's rigging standard, what is the maximum allowable wear on a wire rope sling before removal from service?

  1. More than one-third of the outer wire diameter worn away Correct answer.
  2. Any visible wear
  3. No limit if the sling is inspected daily
  4. More than one-half of the outer wire diameter

Explanation

Wire rope slings must be removed from service when outer wires are worn by more than one-third of their original diameter. Wear beyond that reduces strength below safe limits. Daily inspection does not permit continued use of a sling that exceeds the removal criterion.

Question 14Occupational Safety and Health Regulations and Standards for Hoisting Equipment

What is the required action when a crane's load chart indicates a capacity at a given radius and the actual radius increases during the lift?

  1. Increase boom angle to compensate
  2. Continue if the load is already off the ground
  3. Stop and lower the load unless the new radius is within the charted capacity Correct answer.
  4. Reduce engine speed to lower the load

Explanation

Rated capacity decreases as radius increases, so exceeding the charted radius can overload the crane even if the load is already lifted. The operator must stop and lower the load unless the new radius remains within the charted capacity. Boom angle and engine speed do not change the capacity limit.

Question 15Occupational Safety and Health Regulations and Standards for Hoisting Equipment

Who is responsible for ensuring that a crane's annual periodic inspection is performed and documented?

  1. The employer, using a qualified inspector Correct answer.
  2. The site's general contractor alone
  3. Only the crane operator
  4. Only the manufacturer

Explanation

The employer is responsible for ensuring required inspections are completed by a qualified person and for maintaining records. The operator performs pre-shift checks but does not alone satisfy the periodic inspection requirement. The manufacturer and general contractor may be involved but are not solely responsible.

Question 16Occupational Safety and Health Regulations and Standards for Hoisting Equipment

A load is suspended from a two-leg sling with each leg at a 30-degree angle from vertical. How does the tension in each leg compare with the load weight?

  1. Each leg carries the full load weight
  2. Each leg carries exactly half the load weight
  3. Each leg carries less than half the load weight
  4. Each leg carries more than half the load weight because of the horizontal component Correct answer.

Explanation

As the angle from vertical increases, the tension in each leg rises above half the load because part of the force is horizontal. At 30 degrees from vertical, each leg carries more than half the weight. Only a vertical two-leg sling shares the load equally at half each.

Question 17Occupational Safety and Health Regulations and Standards for Hoisting Equipment

What does OSHA require regarding crane operator certification or qualification?

  1. Only outrigger setup requires training
  2. Operators must be trained and evaluated, and certification is required for certain equipment Correct answer.
  3. Certification is optional for all cranes
  4. No training is required if the operator has five years of experience

Explanation

OSHA requires crane operators to be trained and evaluated, and for equipment covered by the operator qualification rule, certification by an accredited body or qualified evaluator is required. Experience alone does not satisfy the requirement. Outrigger setup is only one of many tasks requiring trained personnel.

Question 18Occupational Safety and Health Regulations and Standards for Hoisting Equipment

How should a crane be positioned relative to a trench excavation when the crane's outriggers would otherwise be near the edge?

  1. Keep the crane and outriggers back from the edge and use mats or blocking as needed Correct answer.
  2. Operate without outriggers to reduce ground pressure
  3. Place outriggers as close to the edge as possible for reach
  4. Lower the outriggers into the trench

Explanation

Cranes must be set back from excavation edges because the soil near the edge may be undermined and unable to support outrigger loads. Mats or blocking distribute pressure and reduce settlement. Placing outriggers near or in the trench risks collapse and overturning.

Question 19Occupational Safety and Health Regulations and Standards for Hoisting Equipment

Which of the following best describes the function of a crane's boom angle indicator?

  1. It shows the angle of the boom to help the operator determine radius and capacity Correct answer.
  2. It limits the maximum hoist line speed
  3. It records the number of lifts per shift
  4. It measures the load weight on the hook

Explanation

The boom angle indicator displays the boom's angle, which the operator uses with boom length to find radius and the corresponding rated capacity. It does not measure load weight or control hoist speed. Load moment indicators use angle as one input but serve a different function.

Question 20Occupational Safety and Health Regulations and Standards for Hoisting Equipment

A crane contacts an energized power line. What should the operator do first?

  1. Stay in the cab and warn others to stay away until the line is de-energized Correct answer.
  2. Immediately jump from the cab to the ground
  3. Restart the engine and drive away
  4. Climb down the boom to inspect the damage

Explanation

If a crane contacts a power line, the operator should remain in the cab and warn others to stay clear until the line is de-energized, because the crane and ground may be energized. Jumping or climbing down risks electrocution. Movement should occur only when directed by emergency personnel.

Question 21Occupational Safety and Health Regulations and Standards for Hoisting Equipment

What is the correct procedure for lowering a load when the crane's load moment indicator alarms during a lift?

  1. Extend the boom to reduce the moment
  2. Stop the lift and lower the load to reduce radius or load before proceeding Correct answer.
  3. Increase hoist speed to finish quickly
  4. Continue the lift and ignore the alarm if the load is light

Explanation

A load moment alarm indicates the crane is approaching or has exceeded rated capacity, so the operator must stop and lower the load or reduce radius before continuing. Ignoring the alarm or increasing speed worsens the overload. Extending the boom increases radius and moment, making the condition worse.

Question 22Occupational Safety and Health Regulations and Standards for Hoisting Equipment

Which of the following is a required component of a crane's pre-shift inspection?

  1. Testing the fire suppression system on the site office
  2. Checking control mechanisms, brakes, and limit devices Correct answer.
  3. Calibrating the load chart
  4. Reviewing the project budget

Explanation

The pre-shift inspection covers the crane's operating systems, including controls, brakes, limit devices, and rigging, to confirm the equipment is safe for use. Site office systems and budgets are unrelated. Load charts are not calibrated; they are manufacturer documents.

Question 23Occupational Safety and Health Regulations and Standards for Hoisting Equipment

What is the purpose of the rated capacity limiter on a crane?

  1. To replace the need for a load chart
  2. To increase the crane's lifting capacity in cold weather
  3. To prevent the crane from exceeding its rated capacity by stopping or limiting functions Correct answer.
  4. To control the swing brake automatically

Explanation

The rated capacity limiter monitors load and geometry and stops or limits crane functions before rated capacity is exceeded. It does not increase capacity or replace load charts. Swing brake control is a separate function.

Question 24Occupational Safety and Health Regulations and Standards for Hoisting Equipment

When is a crane's anti-two-block device required to be tested?

  1. Only after a repair
  2. Only when the boom is extended fully
  3. Before each shift as part of the pre-use inspection Correct answer.
  4. Once per year

Explanation

The anti-two-block device must be tested before each shift to confirm it will stop hoisting before the block contacts the boom tip. Testing only after repairs or annually would allow a failed device to go undetected. The test is part of the pre-use inspection.

Question 25Occupational Safety and Health Regulations and Standards for Hoisting Equipment

Which factor most directly determines the rated capacity of a lattice-boom crane at a given radius?

  1. The operator's seniority
  2. Boom length and angle, counterweight, and the manufacturer's chart Correct answer.
  3. The number of tag lines used
  4. The color of the crane

Explanation

Rated capacity depends on boom length and angle, counterweight, and other configuration details specified in the manufacturer's load chart. Color, operator seniority, and tag line count do not affect capacity. The operator must use the chart for the actual configuration.

Question 26Occupational Safety and Health Regulations and Standards for Hoisting Equipment

Under OSHA's cranes and derricks standard, what must occur before a crane is assembled or disassembled on a site where the crane will be working near energized power lines?

  1. Only the operator needs to be briefed on electrical hazards before setup
  2. The utility owner must de-energize the lines for the entire project duration
  3. The assembly/disassembly supervisor must be informed of the hazards and the required procedures Correct answer.
  4. A signal person must be stationed at the boom tip during assembly

Explanation

The standard requires that the hazards of working near power lines be assessed and that the assembly/disassembly supervisor and crew be informed of the hazards and the procedures to control them before starting the task. The operator alone is not sufficient, and de-energizing the entire project is not a blanket requirement.

Question 27Occupational Safety and Health Regulations and Standards for Hoisting Equipment

A crane is operating with a load chart that specifies a maximum wind speed of 20 mph for the given boom configuration. Gusts reach 24 mph. What does the standard require the operator to do?

  1. Continue the lift but reduce swing speed to compensate
  2. Continue only if a signal person confirms the load is stable
  3. Continue and log the gust speed in the inspection record
  4. Stop the lift because the load chart's wind limit has been exceeded Correct answer.

Explanation

Load charts and manufacturer procedures set a maximum allowable wind speed for each configuration, and operations must not exceed it. When measured wind exceeds the chart limit, the lift must be stopped and the load safely landed. Reducing swing speed or adding a signal person does not override the manufacturer's limit.

Question 28Occupational Safety and Health Regulations and Standards for Hoisting Equipment

Which document establishes the maximum load a specific crane may lift at a given radius and boom configuration?

  1. The site-specific lift plan prepared by the general contractor
  2. The operator's certification card
  3. The manufacturer's load chart for that crane and configuration Correct answer.
  4. The rigging capacity tag on the sling assembly

Explanation

The manufacturer's load chart is the controlling document that states rated capacities for each radius, boom length, and configuration. A lift plan and rigging tags must be consistent with it but cannot increase the charted capacity. The operator's certification only shows qualification, not capacity.

Question 29Occupational Safety and Health Regulations and Standards for Hoisting Equipment

What is the primary purpose of a crane's swing radius barricade or swing area control?

  1. To mark the maximum working radius of the load chart
  2. To prevent the load from contacting the boom
  3. To indicate where the outrigger floats must be placed
  4. To keep personnel out of the area swept by the rotating superstructure and counterweight Correct answer.

Explanation

The hazard being controlled is the crushing zone created by the rotating superstructure and counterweight, so the barricade keeps personnel out of that swing area. It is not a load-radius marker or an outrigger layout guide.

Question 30Occupational Safety and Health Regulations and Standards for Hoisting Equipment

An operator must leave the controls of a crane with a suspended load for a short break. What does the standard require?

  1. Lower the load to the ground and secure the crane before leaving the controls Correct answer.
  2. Attach a tag line to the load and leave it suspended
  3. Leave the engine running and the load suspended only if the wind is calm
  4. Set the brake and leave the load suspended while another qualified person watches

Explanation

A suspended load must not be left unattended; the operator must land the load and secure the machine before leaving the controls. Having another person watch or adding a tag line does not make an unattended suspended load acceptable.

Question 31Occupational Safety and Health Regulations and Standards for Hoisting Equipment

According to OSHA's sling standard, what is the maximum allowable wear or reduction in a wire rope sling before it must be removed from service?

  1. Five percent of the original wire diameter Correct answer.
  2. Ten percent of the original wire diameter
  3. Twenty percent of the original wire diameter
  4. Fifteen percent of the original wire diameter

Explanation

Wire rope slings must be removed from service when individual outer wires show wear or reduction exceeding the stated percentage of the original wire diameter. The controlling figure is five percent, not ten or twenty.

Question 32Occupational Safety and Health Regulations and Standards for Hoisting Equipment

A crane's load chart shows 12,000 lb capacity at a 30-foot radius and 8,000 lb at a 40-foot radius. The load weighs 9,500 lb and the boom must reach 40 feet. What is the correct action?

  1. Proceed if a second crane assists with part of the load
  2. Do not lift at that radius; the load exceeds the charted capacity Correct answer.
  3. Proceed at reduced swing speed to limit dynamic loading
  4. Proceed because the load is below the 30-foot capacity

Explanation

Rated capacity must be checked at the actual working radius, and at 40 feet the chart permits only 8,000 lb, which the 9,500 lb load exceeds. The 30-foot figure is irrelevant once the required radius is 40 feet. Reducing speed or adding a second crane does not make the charted capacity adequate.

Question 33Occupational Safety and Health Regulations and Standards for Hoisting Equipment

Which of the following is a required element of a crane's shift inspection before use?

  1. Ultrasonic testing of the boom pins
  2. A load test at 110 percent of rated capacity
  3. Verification of control mechanisms, including brakes, and inspection of the wire rope for damage Correct answer.
  4. Recalibration of the load moment indicator by a certified technician

Explanation

Shift inspections focus on items that affect safe operation that day, such as control mechanisms, brakes, and the condition of wire rope and other rigging. Load tests, ultrasonic pin testing, and LMI recalibration are periodic or specialized activities, not shift-inspection items.

Question 34Occupational Safety and Health Regulations and Standards for Hoisting Equipment

What is the function of a rated capacity limiter on a crane?

  1. To warn only when the load approaches the charted capacity
  2. To limit the swing speed of the superstructure
  3. To prevent the crane from handling a load that exceeds the rated capacity for the configuration Correct answer.
  4. To measure and display boom angle and radius

Explanation

A rated capacity limiter acts to prevent the crane from lifting or moving a load beyond the rated capacity for the current configuration, rather than merely warning. Boom angle and radius display is the job of indicators, and swing speed control is a separate function.

Question 35Occupational Safety and Health Regulations and Standards for Hoisting Equipment

When must the anti-two-block device on a crane be tested?

  1. Once per month by a qualified technician
  2. Only during the annual periodic inspection
  3. Before each shift and after any repair or adjustment affecting the device Correct answer.
  4. Only when the boom is being extended

Explanation

The anti-two-block device must be functionally tested before each shift and again after any repair, adjustment, or alteration that could affect it. Annual or monthly testing alone would leave the device unchecked for long intervals.

Question 36Occupational Safety and Health Regulations and Standards for Hoisting Equipment

A crane's outriggers are set on firm ground, but the site plan shows an unmarked buried utility line beneath one float. What is the appropriate action before lifting?

  1. Locate and protect the utility, or relocate the crane so the float does not load the line Correct answer.
  2. Proceed because the outrigger pad spreads the load over a wide area
  3. Reduce the load to half of charted capacity and proceed
  4. Proceed and monitor the ground for settlement during the lift

Explanation

Ground bearing under outriggers must be adequate, and buried utilities must be located and protected before a crane is set up over them. A spreader pad does not eliminate the risk to a buried line, and monitoring settlement is not a substitute for locating and protecting the utility.

Question 37Occupational Safety and Health Regulations and Standards for Hoisting Equipment

A crane's boom will pass within the minimum clearance distance of an energized overhead line, and the line cannot be de-energized. What control does the standard require?

  1. Use of a dedicated spotter and insulating barriers or other protective measures acceptable under the standard Correct answer.
  2. Proceed only if the load is nonconductive
  3. Proceed if the operator keeps the boom at least one foot from the line
  4. Proceed after notifying the utility and recording the notification

Explanation

When de-energizing is not feasible and the minimum clearance cannot be maintained, the standard requires protective measures such as insulating barriers, line grounding, or a dedicated spotter with the authority to stop the operation. A one-foot gap is not the required clearance, and a nonconductive load does not protect the boom.

Question 38Occupational Safety and Health Regulations and Standards for Hoisting Equipment

What does the standard require regarding the use of a qualified signal person during crane operations?

  1. A signal person is required only when the crane is working near power lines
  2. A signal person is required for every lift regardless of visibility
  3. A signal person is required only for lifts over 75 percent of capacity
  4. A signal person is required only when the operator's view is obstructed or the operator or site rules require one Correct answer.

Explanation

A qualified signal person is required when the point of operation is not in full view of the operator, when the operator or the site determines one is needed, or when the operator's view is obstructed during travel. Requiring one for every lift or tying it to capacity or power-line proximity misstates the rule.

Question 39Occupational Safety and Health Regulations and Standards for Hoisting Equipment

Under OSHA's cranes and derricks in construction standard, which of the following best describes the role of the crane operator during the assembly and disassembly of a crane?

  1. The operator may participate in assembly only when a qualified assembly director oversees every step of the process
  2. The operator must be at the controls whenever any component is being pinned or connected
  3. The operator may assist only after the assembly director has completed the pre-assembly inspection
  4. The operator is not permitted to assist with assembly or disassembly at any point Correct answer.

Explanation

The standard separates the roles of operating and assembling a crane: the operator is not allowed to assist in assembly or disassembly because the operator's attention must remain on controlling the equipment and any suspended loads. Assembly and disassembly must instead be directed by a qualified person and carried out by employees who are trained and competent for that work.

Question 40Occupational Safety and Health Regulations and Standards for Hoisting Equipment

A crane is being set up beside a freshly backfilled excavation, and the outrigger floats will bear on the fill. Which action best satisfies the standard's requirements for the supporting surface?

  1. Lower the floats onto the fill and monitor them visually during the first lift
  2. Proceed if the floats are fully extended, since full extension alone guarantees stability
  3. Use blocking or mats sized so the load is spread over an area the ground can support without settling Correct answer.
  4. Rely on the outrigger beams' structural rating, because the beams transfer load regardless of soil condition

Explanation

The standard requires that the ground under outriggers be firm, drained, and graded, and that the blocking or mats used be strong enough and large enough that the supporting surface can bear the imposed load without failure. Fresh backfill is a known unstable condition, so the bearing area must be increased and verified before lifting.

Question 41Crane Types, Components, and Load Charts

On a lattice-boom crane load chart, what does the term 'radius' measure?

  1. The vertical distance from the boom pivot to the boom tip
  2. The horizontal distance from the carrier tail to the outrigger pad
  3. The horizontal distance from the center of rotation to the center of the suspended load Correct answer.
  4. The length of the boom measured along its centerline

Explanation

Radius is defined as the horizontal distance from the crane's center of rotation to the vertical line through the center of gravity of the load, measured with the boom at the specified configuration. It is not boom length or height, and it changes as the boom is raised or lowered.

Question 42Crane Types, Components, and Load Charts

A crane's load chart is based on which of the following being level?

  1. The outrigger pads only
  2. The boom tip
  3. The load hook
  4. The crane carrier or mounting surface Correct answer.

Explanation

Rated capacities assume the crane is level within the manufacturer's tolerance, typically checked with a level indicator on the carrier. Out-of-level conditions shift load onto individual outriggers or tires and reduce stability, so chart values no longer apply.

Question 43Crane Types, Components, and Load Charts

A telescopic boom crane is set up with outriggers fully extended on firm, level ground. Which factor most directly determines the chart capacity at a given radius?

  1. Boom length and boom angle Correct answer.
  2. Color of the load chart decal
  3. Number of parts of load line only
  4. Wind direction at the time of lift

Explanation

For a given outrigger configuration, capacity depends primarily on boom length and boom angle, which together set the radius and the structural and stability limits. The chart lists capacities for each boom length and radius combination.

Question 44Crane Types, Components, and Load Charts

What does the term 'boom angle' refer to on a crane load chart?

  1. The angle between the boom centerline and horizontal Correct answer.
  2. The angle between the load line and vertical
  3. The angle of the swing to the carrier centerline
  4. The angle of the outrigger beam to the carrier

Explanation

Boom angle is measured between the boom centerline and the horizontal plane, and charts list capacities by angle or by radius. As the boom is raised, angle increases and radius typically decreases.

Question 45Crane Types, Components, and Load Charts

Which component carries the load from the boom tip down to the hook?

  1. The boom pivot pin
  2. The swing circle
  3. The counterweight
  4. The load line and sheaves Correct answer.

Explanation

The load line runs over sheaves at the boom tip and down to the hook block, transmitting the hoist force to the load. Sheaves guide the rope, and the line must be properly reeved and inspected.

Question 46Crane Types, Components, and Load Charts

On a crawler crane, what is the function of the boom foot pins?

  1. They connect the load line to the hook
  2. They limit the maximum boom angle
  3. They secure the boom butt to the revolving bed Correct answer.
  4. They allow the boom to be folded for transport

Explanation

Boom foot pins anchor the boom butt to the crane's revolving bed and transmit boom loads into the structure. They must be fully installed and secured before lifting.

Question 47Crane Types, Components, and Load Charts

What does the term 'parts of line' describe on a crane?

  1. The number of outrigger beams
  2. The number of load chart pages
  3. The number of boom sections in the crane
  4. The number of rope falls supporting the load block Correct answer.

Explanation

Parts of line is the number of rope falls running between the boom tip sheaves and the load block, which divides the load among the falls and sets line pull. More parts reduce line pull but reduce hoist speed.

Question 48Crane Types, Components, and Load Charts

A crane operator must determine capacity for a lift at a 30-foot radius with a 60-foot boom. Which chart section should be used?

  1. The section for the maximum counterweight only
  2. The section matching the 60-foot boom, read at the 30-foot radius row Correct answer.
  3. The section for the shortest boom at any radius
  4. The section for pick-and-carry travel

Explanation

Load charts are organized by boom length and configuration, so the operator selects the column or page for the actual boom length and reads capacity at the actual radius. Using a different boom length would give a capacity that does not apply.

Question 49Crane Types, Components, and Load Charts

An operator is lifting with the boom over the side of the carrier. Which chart range applies?

  1. The travel range
  2. The over-front range only
  3. The over-side or 360-degree range, depending on the chart Correct answer.
  4. The over-rear range only

Explanation

Charts typically separate over-front, over-rear, and over-side or full-rotation capacities because structure and stability differ by direction. The operator must match the actual swing position to the correct chart range.

Question 50Crane Types, Components, and Load Charts

A load chart lists a capacity of 12,000 lb at a given radius, and the operator must add a 500 lb hook block and 300 lb of rigging. What is the maximum allowable load weight?

  1. 12,800 lb
  2. 11,500 lb
  3. 11,200 lb Correct answer.
  4. 12,000 lb

Explanation

Rated capacity includes the weight of the hook block and all rigging, so those deductions must be subtracted from the chart value. 12,000 minus 500 minus 300 equals 11,200 lb of allowable load.