Mobile Crane Questions Test #3
Questions and Answers 100% Verified
The crane is out of level, you release the swing brake, the boom swings downhill, your: -
ANSWER - Load radius increases.
Blocking can be placed under the ends of tracks to: - ANSWER - Increase the crane's stability
when operating over the front or back.
What quadrant produces the least amount of ground pressure on a lattice crawler? - ANSWER -
Side.
On lattice boom cranes fitted with power load lowering, a heavy load should be lowered by
using the: - ANSWER - Powerload-lowering feature and the foot brake.
Abruptly stopping a rapid swing on a long boom mobile crane will produce what major effect? -
ANSWER - Overturning the crane or collapsing the boom.
When the boom handle is released to its center position, which action should be expected? -
ANSWER - The boom hoist will be held stationary.
On a lattice boom crawler crane, the main boom length is measured from the: - ANSWER -
Center of the boom heel pins to the center of the boom tip sheave.
You can't level your crawler crane: - ANSWER - Don't operate the crane.
What effect does having the crawlers retracted have on a crawler crane with a long boom? -
ANSWER - Decrease in capacity.
During assembly, where should you attach slings to lift boom sections? - ANSWER - End
fittings.
, Which boom configuration can cause the most hazardous boom side-loading condition? -
ANSWER - Long boom with minimum radius.
When is it safe to handle loads under power lines? - ANSWER - The load nor any part of the
crane can come closer than regulations allow.
Your crawler crane is on a barge, it is necessary to: - ANSWER - Secure the crane to the barge.
A pin-connected lattice boom is being dismantled. After connecting the equalizer (bridle) to the
connecting lugs on the boom, which boom connecting pins should be removed first? - ANSWER
- Lower connection pins, located at and ahead of the equalizer.
When using a mobile crane on a barge, the crane's load capacity chart shall be: - ANSWER -
Replaced by a list chart.
How many broken wires are permitted at the end connection of a pendant before it must be
taken out of service? - ANSWER - 1.
If high winds are expected and the lattice boom crane must be secured pointing into the wind,
then the hook should be: - ANSWER - Secured to a solid structure directly below the boom
point.
When assembling a lattice boom on most crawler cranes using inserts of different lengths,
which insert section generally should be closest to the boom foot? - ANSWER - 10 ft.
On a lattice boom truck crane, boom angle is measured between the center-line of the: -
ANSWER - Loaded boom and the horizontal.
When a lattice boom truck crane is lifting on outriggers, the floats or pads should always be: -
ANSWER - Secured to the outriggers.
ManufacturerGspecificationsGpermitGonlyGaGcertainGamountGofGboomGtoGbeGsuspendedGoutGpastGt
heGconnectionsGpointGofGtheGpendantsGduringGassemblyGorGdisassemblyGofGtheGboom.GTheGportio
nGofGboomGthatGisGsuspendedGinGthisGwayGisGcalledGthe:G-GANSWERG-GCantileverGlength.
Questions and Answers 100% Verified
The crane is out of level, you release the swing brake, the boom swings downhill, your: -
ANSWER - Load radius increases.
Blocking can be placed under the ends of tracks to: - ANSWER - Increase the crane's stability
when operating over the front or back.
What quadrant produces the least amount of ground pressure on a lattice crawler? - ANSWER -
Side.
On lattice boom cranes fitted with power load lowering, a heavy load should be lowered by
using the: - ANSWER - Powerload-lowering feature and the foot brake.
Abruptly stopping a rapid swing on a long boom mobile crane will produce what major effect? -
ANSWER - Overturning the crane or collapsing the boom.
When the boom handle is released to its center position, which action should be expected? -
ANSWER - The boom hoist will be held stationary.
On a lattice boom crawler crane, the main boom length is measured from the: - ANSWER -
Center of the boom heel pins to the center of the boom tip sheave.
You can't level your crawler crane: - ANSWER - Don't operate the crane.
What effect does having the crawlers retracted have on a crawler crane with a long boom? -
ANSWER - Decrease in capacity.
During assembly, where should you attach slings to lift boom sections? - ANSWER - End
fittings.
, Which boom configuration can cause the most hazardous boom side-loading condition? -
ANSWER - Long boom with minimum radius.
When is it safe to handle loads under power lines? - ANSWER - The load nor any part of the
crane can come closer than regulations allow.
Your crawler crane is on a barge, it is necessary to: - ANSWER - Secure the crane to the barge.
A pin-connected lattice boom is being dismantled. After connecting the equalizer (bridle) to the
connecting lugs on the boom, which boom connecting pins should be removed first? - ANSWER
- Lower connection pins, located at and ahead of the equalizer.
When using a mobile crane on a barge, the crane's load capacity chart shall be: - ANSWER -
Replaced by a list chart.
How many broken wires are permitted at the end connection of a pendant before it must be
taken out of service? - ANSWER - 1.
If high winds are expected and the lattice boom crane must be secured pointing into the wind,
then the hook should be: - ANSWER - Secured to a solid structure directly below the boom
point.
When assembling a lattice boom on most crawler cranes using inserts of different lengths,
which insert section generally should be closest to the boom foot? - ANSWER - 10 ft.
On a lattice boom truck crane, boom angle is measured between the center-line of the: -
ANSWER - Loaded boom and the horizontal.
When a lattice boom truck crane is lifting on outriggers, the floats or pads should always be: -
ANSWER - Secured to the outriggers.
ManufacturerGspecificationsGpermitGonlyGaGcertainGamountGofGboomGtoGbeGsuspendedGoutGpastGt
heGconnectionsGpointGofGtheGpendantsGduringGassemblyGorGdisassemblyGofGtheGboom.GTheGportio
nGofGboomGthatGisGsuspendedGinGthisGwayGisGcalledGthe:G-GANSWERG-GCantileverGlength.
