Podcast
Questions and Answers
What category is a self-propelled boom?
What category is a self-propelled boom?
- 3a
- 4a
- 4b
- 3b (correct)
Slab type units will usually have?
Slab type units will usually have?
unknown
A 3a MEWP can be equipped with an extendable deck.
A 3a MEWP can be equipped with an extendable deck.
True (A)
RT units can travel over any rough terrain.
RT units can travel over any rough terrain.
What is a scissor lift?
What is a scissor lift?
Internal engines can be fueled by which types of fuel?
Internal engines can be fueled by which types of fuel?
In 3b MEWP, what component can be raised, lowered, extended, or retracted?
In 3b MEWP, what component can be raised, lowered, extended, or retracted?
What is the component that is mobile, stable, and supports all other components?
What is the component that is mobile, stable, and supports all other components?
PA cannot be past the tipping lines of what?
PA cannot be past the tipping lines of what?
What are the two main sources of power for boom and scissor lifts?
What are the two main sources of power for boom and scissor lifts?
Rough forklifts usually have what type of tires?
Rough forklifts usually have what type of tires?
What does gradability of a unit refer to?
What does gradability of a unit refer to?
All MEWPS have 4 wheel drive and steering.
All MEWPS have 4 wheel drive and steering.
All controls that affect movement must return to neutral when released.
All controls that affect movement must return to neutral when released.
What is proportional speed control?
What is proportional speed control?
Most MEWPS have the option of running on batteries.
Most MEWPS have the option of running on batteries.
What document must be considered for specifications?
What document must be considered for specifications?
What is the purpose of a limit switch?
What is the purpose of a limit switch?
What does the slope warning device do?
What does the slope warning device do?
What is the function of an enable switch?
What is the function of an enable switch?
What assists the operator in the intended direction of travel?
What assists the operator in the intended direction of travel?
What helps remind operators to stay properly oriented to the unit's drive direction?
What helps remind operators to stay properly oriented to the unit's drive direction?
What helps keep all wheels in contact with the ground when driving on rough terrain?
What helps keep all wheels in contact with the ground when driving on rough terrain?
What is the purpose of extendable axles?
What is the purpose of extendable axles?
What system automatically maintains the preset tilt angle of the platform?
What system automatically maintains the preset tilt angle of the platform?
Scissor pothole protection is auto engaged.
Scissor pothole protection is auto engaged.
What should you do to the wheels?
What should you do to the wheels?
What is required to access within the raised elevating system?
What is required to access within the raised elevating system?
In order for any powered systems to operate, what must you do?
In order for any powered systems to operate, what must you do?
CCG will move in what direction?
CCG will move in what direction?
What is leverage in relation to a lever?
What is leverage in relation to a lever?
If the platform rises, the CCG rises.
If the platform rises, the CCG rises.
When two separate objects join together, what do their centers of gravity form?
When two separate objects join together, what do their centers of gravity form?
When the boom is fully extended in a horizontal position, what actions will increase your overall stability?
When the boom is fully extended in a horizontal position, what actions will increase your overall stability?
Overall stability of a MEWP is determined by what?
Overall stability of a MEWP is determined by what?
As the turret rotates, the location of the fulcrum changes.
As the turret rotates, the location of the fulcrum changes.
An object heavier at the bottom is more stable than one heavier at the top.
An object heavier at the bottom is more stable than one heavier at the top.
What are stability-enhancing devices used for?
What are stability-enhancing devices used for?
Where is the fulcrum of a lift located?
Where is the fulcrum of a lift located?
What must all powered components do during inspection?
What must all powered components do during inspection?
The annual inspection can be performed by an experienced operator.
The annual inspection can be performed by an experienced operator.
A risk assessment is only required for your first work location.
A risk assessment is only required for your first work location.
A work site inspection is a separate part of pre-use.
A work site inspection is a separate part of pre-use.
Shielding and funneling effects of structures can cause high wind speeds on low wind speed days.
Shielding and funneling effects of structures can cause high wind speeds on low wind speed days.
When performing powered function test inspections, the controls at the ground or platform must be checked.
When performing powered function test inspections, the controls at the ground or platform must be checked.
All MEWPS are approved for use in hazardous locations.
All MEWPS are approved for use in hazardous locations.
Damaged or illegible decals and labels must be replaced.
Damaged or illegible decals and labels must be replaced.
You only need to wear a personal protection system when the platform is elevated to work height.
You only need to wear a personal protection system when the platform is elevated to work height.
Who is directly responsible for ensuring that all platform occupants are wearing the required fall protection gear?
Who is directly responsible for ensuring that all platform occupants are wearing the required fall protection gear?
What is MAD to an energized powerline carrying 50kC?
What is MAD to an energized powerline carrying 50kC?
In a normal travel configuration of a 3A scissor lift, where should the platform control modules be positioned?
In a normal travel configuration of a 3A scissor lift, where should the platform control modules be positioned?
In normal travel configuration of a 3B boom lift, where should the platform be positioned?
In normal travel configuration of a 3B boom lift, where should the platform be positioned?
When making a turn with a boom in the normal travel configuration, the platform will swing out in the opposite direction of travel.
When making a turn with a boom in the normal travel configuration, the platform will swing out in the opposite direction of travel.
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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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