Boom and Scissor License Flashcards
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Questions and Answers

What category is a self-propelled boom?

  • 3a
  • 4a
  • 4b
  • 3b (correct)

    • Slab type units will usually have?

    unknown

    A 3a MEWP can be equipped with an extendable deck.

    True

    RT units can travel over any rough terrain.

    <p>False</p> Signup and view all the answers

    What is a scissor lift?

    <p>Lift arms crisscross</p> Signup and view all the answers

    Internal engines can be fueled by which types of fuel?

    <p>All of the above</p> Signup and view all the answers

    In 3b MEWP, what component can be raised, lowered, extended, or retracted?

    <p>Boom</p> Signup and view all the answers

    What is the component that is mobile, stable, and supports all other components?

    <p>Mbase/Chassis</p> Signup and view all the answers

    PA cannot be past the tipping lines of what?

    <p>The base</p> Signup and view all the answers

    What are the two main sources of power for boom and scissor lifts?

    <p>Engine and Battery</p> Signup and view all the answers

    Rough forklifts usually have what type of tires?

    <p>Foam filled pneumatic</p> Signup and view all the answers

    What does gradability of a unit refer to?

    <p>Maximum grade of incline or decline that the unit can safely travel on with a maximum rated load</p> Signup and view all the answers

    All MEWPS have 4 wheel drive and steering.

    <p>False</p> Signup and view all the answers

    All controls that affect movement must return to neutral when released.

    <p>True</p> Signup and view all the answers

    What is proportional speed control?

    <p>The more you move, the faster it goes</p> Signup and view all the answers

    Most MEWPS have the option of running on batteries.

    <p>True</p> Signup and view all the answers

    What document must be considered for specifications?

    <p>Man operator manual</p> Signup and view all the answers

    What is the purpose of a limit switch?

    <p>To prevent certain parts of the unit from moving outside their safe working range</p> Signup and view all the answers

    What does the slope warning device do?

    <p>Warns when the tilt sensor determines the base of the unit is off level by five degrees or less or as specified by the manufacturer</p> Signup and view all the answers

    What is the function of an enable switch?

    <p>To prevent unintentional activation of the operational controls</p> Signup and view all the answers

    What assists the operator in the intended direction of travel?

    <p>Drive direction arrows</p> Signup and view all the answers

    What helps remind operators to stay properly oriented to the unit's drive direction?

    <p>Drive enable system</p> Signup and view all the answers

    What helps keep all wheels in contact with the ground when driving on rough terrain?

    <p>Oscillating axles</p> Signup and view all the answers

    What is the purpose of extendable axles?

    <p>To widen the drive chassis to increase overall stability of the unit</p> Signup and view all the answers

    What system automatically maintains the preset tilt angle of the platform?

    <p>Auto level system</p> Signup and view all the answers

    Scissor pothole protection is auto engaged.

    <p>True</p> Signup and view all the answers

    What should you do to the wheels?

    <p>Chock the wheels</p> Signup and view all the answers

    What is required to access within the raised elevating system?

    <p>Safety prob used</p> Signup and view all the answers

    In order for any powered systems to operate, what must you do?

    <p>Engage the function enable</p> Signup and view all the answers

    CCG will move in what direction?

    <p>The opposite of direction</p> Signup and view all the answers

    What is leverage in relation to a lever?

    <p>Force exerted by a lever</p> Signup and view all the answers

    If the platform rises, the CCG rises.

    <p>True</p> Signup and view all the answers

    When two separate objects join together, what do their centers of gravity form?

    <p>Combined center of gravity</p> Signup and view all the answers

    When the boom is fully extended in a horizontal position, what actions will increase your overall stability?

    <p>Retract or elevate</p> Signup and view all the answers

    Overall stability of a MEWP is determined by what?

    <p>Position of CG or CCG</p> Signup and view all the answers

    As the turret rotates, the location of the fulcrum changes.

    <p>True</p> Signup and view all the answers

    An object heavier at the bottom is more stable than one heavier at the top.

    <p>True</p> Signup and view all the answers

    What are stability-enhancing devices used for?

    <p>Increase stability of the unit</p> Signup and view all the answers

    Where is the fulcrum of a lift located?

    <p>Wheels and tires</p> Signup and view all the answers

    What must all powered components do during inspection?

    <p>Run through their full range of motion by the operator, space permitting during which inspection</p> Signup and view all the answers

    The annual inspection can be performed by an experienced operator.

    <p>False</p> Signup and view all the answers

    A risk assessment is only required for your first work location.

    <p>False</p> Signup and view all the answers

    A work site inspection is a separate part of pre-use.

    <p>False</p> Signup and view all the answers

    Shielding and funneling effects of structures can cause high wind speeds on low wind speed days.

    <p>True</p> Signup and view all the answers

    When performing powered function test inspections, the controls at the ground or platform must be checked.

    <p>True</p> Signup and view all the answers

    All MEWPS are approved for use in hazardous locations.

    <p>False</p> Signup and view all the answers

    Damaged or illegible decals and labels must be replaced.

    <p>True</p> Signup and view all the answers

    You only need to wear a personal protection system when the platform is elevated to work height.

    <p>False</p> Signup and view all the answers

    Who is directly responsible for ensuring that all platform occupants are wearing the required fall protection gear?

    <p>Operator</p> Signup and view all the answers

    What is MAD to an energized powerline carrying 50kC?

    <p>10 ft 3m</p> Signup and view all the answers

    In a normal travel configuration of a 3A scissor lift, where should the platform control modules be positioned?

    <p>At the front of the unit, typically above the right side steer wheel</p> Signup and view all the answers

    In normal travel configuration of a 3B boom lift, where should the platform be positioned?

    <p>Directly behind the rear drive axle, high enough to see over the turret</p> Signup and view all the answers

    When making a turn with a boom in the normal travel configuration, the platform will swing out in the opposite direction of travel.

    <p>True</p> Signup and view all the answers

    Study Notes

    MEWP Categories and Definitions

    • Self-propelled boom classified under category 3b.
    • Slab-type units usually have specific characteristics, implying potential stability and support features.
    • A 3a MEWP can be equipped with an extendable deck, enhancing versatility.
    • RT (Rough Terrain) units cannot traverse all rough terrains; they have specific capabilities.
    • Scissor lift utilizes crisscrossing lift arms for elevation.

    Power Sources and Engine Types

    • Internal engines can use various fuels including gas, diesel, and propane (LP).
    • The two main power sources for boom and scissor lifts are the engine and battery.

    Mechanisms and Safety Features

    • Boom functionality involves raising, lowering, extending, or retracting.
    • The base or chassis is mobile, stable, and supports all other components.
    • PA (platform occupants) must not exceed the tipping lines of the base to maintain safety.
    • All movement controls must return to neutral when released to ensure operator safety.
    • Proportional speed control means faster movement proportional to the control's distance moved.

    Operational and Safety Protocols

    • Many MEWPs offer a running option for enhanced flexibility during operation.
    • Specifications and operational guidelines should be referenced in the operator manual.
    • Limit switches are essential for preventing parts from moving outside their safe working range.
    • The slope warning device activates when the tilt sensor detects deviations from level platforms.

    Stability Considerations

    • Drive direction arrows assist operators in correct directional travel.
    • Oscillating axles maintain wheel contact with the ground on rough terrain.
    • Extendable axles help widen the drive chassis for increased stability.
    • Auto level systems automatically keep the pre-set tilt angle of the platform steady.
    • Scissor pothole protection is engaged automatically to enhance safety.

    Inspection and Maintenance Responsibilities

    • Vehicles must be inspected pre-use, ensuring powered components function through their full motion range.
    • A qualified operator is required for annual inspections, ensuring proper maintenance and care.
    • Risk assessments must be performed regularly, not just for the initial work location.
    • A worksite inspection is part of ongoing safety compliance requirements, not solely pre-use.

    Environmental and Safety Hazards

    • High wind speeds and turbulence can occur due to structures' shielding and funneling effects, despite low wind speeds in open areas.
    • Personal protection systems are mandatory at all heights, not just elevated platforms.
    • The operator is responsible for ensuring all occupants wear required fall protection gear.
    • A solid rescue plan includes knowing rescue personnel, methods, and timeframe for emergencies.

    Height and Structural Guidelines

    • Minimum approach distance (MAD) to energized powerlines carrying 50 kV is 10 ft (3 m).
    • In normal travel configuration, the control modules for 3A scissor lifts should be positioned at the front, above the right-side steer wheel.
    • For 3B boom lifts, the platform should be positioned behind the rear drive axle to maintain visibility.

    Maneuvering Dynamics

    • When turning with a boom in travel configuration, the platform swings in the opposite direction of travel, affecting operator awareness and control.

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