Telescopic Core Review Flashcards
When lifting off the main boom how is the effective weight of the fly/jib different in the erected position of that of the stowed position
Effective weight increase
Who must determine maximum speed for a mobile crane to travel with a suspended load
the competent person
How does the effective weight of a stowed extension relate to the actual weight of the extension
lower than the actual weight
Using a telescopic mobile crane and lifting off of the jib with the main boom partially extended, you should use ______ to determine gross capacity
Boom Angle
If not listed in the load/capacity chart or notes for a telescopic boom crane and you are in between boom lengths, you should
Use the lowest shorter or longer
Which of the following is required to be on mobile telescopic boom crane in order to lift a personnel platform
Boom length indicator
When operating a rough terrain crane and extending the outrigger beams from the cab you should
make visual contact with beam and jack
When a mobile cranes telescopic boom sections are required to be extended equally and they are not, the effect could be which of the following
Damage to the longest extended section
What item listed below can be removed from a carry deck mobile crane, and continue to be operation
Jib/fly/extension
What is the primary reason for lifting off a boom extension mounted on a mobile telescopic boom crane
increase height
Traveling a rear engine mounted rough terrain mobile crane, with a suspended load you should position the load
over the front quardrant
A telescopic mobile crane is equipped with an anti two block lock out device, When the device is activated which functions will be disabled
Hoist, extend and lower the boom
What device listed below is NOT required on telescopic boom mobile cranes manufactured today
Swing path monitor
Backward stability on a rough terrain mobile crane could be a problem when configured in which situation below
Over the side at a minimum radius
A telescopic boom mobile crane is going to lift a personnel platform, what is required from the list below to be operational on the crane
Controlled load lowering
Which boom configuration can cause the most hazardous boom side loading condition
Long boom with minimum radius
According to OSHA when is it safe to hoist loads with a mobile crane below energized power lines
If fully extended boom cant reach the prohibited zone
A crane loses stability when it leverage on the load is
Less than the load’s leverage on the crane
What is the design factor when using non rotating wire rope slings and lifting personnel in a platform suspended from a mobile crane
10
When should a tag line be used, during the hoisting of material
When the rotation of the load would be dangerous
When taking a lift on outriggers, the maximum ground bearing pressure occurs in which boom position
over the corner
A mobile crane’s jib is off set 15 versus it original 30 offset, but the boom angle remains unchanged. In this situation, the load radius would
decrease
blocking or mats under the outrigger pads/floats shall be
sustain load and maintain stability
when a telescopic boom extension is offset from the main boom, the crane’s capacity normally will be
reduced
on mobile cranes the boom angle indicator indicates what to the operator
angle of boom to horizontal
if working near power lines and using a tag line, which type of rope is least conductive to electricity
polyproplene
which of the following regulations listed below governs the lifting of personnel with a mobile crane in construction
OSHA 1926.1431
Backward stability of a mobile crane is tested in which configuration listed below
Basic boom at maximum angle with no load
On mobile truck cranes operating with outriggers retracted, the least stable position is when the boom is directly over the
side
When a rough terrain crane, is working on tires, backward tipping is most likely to occur when lifting which configuration
side quadrant at a short radius
when traveling a rough terrain mobile crane with a suspended load, which of the following is the most important consideration
boom low as possible with load close to the surface
when retracting the boom on a telescopic mobile crane. the hook block and load will move in what direction
down
Rough terrain mobile crane capacities are generally greater over the
front
mobile truck crane capacities are generally greater over the
rear
