CCO TEST 3 QUESTIONS & ANSWERS
2024/2025
The crane is out of level, you release the swing brake, the boom swings downhill, your: - ANSWERSLoad
radius increases
Blocking can be placed under the ends of tracks to: - ANSWERSIncrease the crane's stability when
operating over the front or back.
What quadrant produces the least amount of ground pressure on a lattice crawler: - ANSWERSSide
On lattice boom cranes fitted with power load lowering, a heavy load should be lowered by using the: -
ANSWERSPower load lowering feature and the foot brake
Abruptly stopping a rapid swing on a long-boom mobile crane will produce what major effect? -
ANSWERSOverturning the crane or collapsing the boom
When the boom handle is released to its center position, which action should be expected? -
ANSWERSThe boom hoist will be held stationary.
On a lattice boom crawler crane, the main boom length is measured from the: - ANSWERSCenter of the
boom heel pins to the center of the boom tip sheave.
If you can't level your crawler crane: - ANSWERSDon't operate it
What effect does having the crawlers retracted have on a crawler crane with a long boom? -
ANSWERSDecrease in capacity
Your crawler crane is on a barge, it is necessary to: - ANSWERSSecure 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? - ANSWERSLower
connection pins, located at and ahead of the equalizer.
When using a mobile crane on a barge, the cranes load capacity chart shall be: - ANSWERSReplaced by a
list chart
How many broken wires are permitted at the end of a pendant before it must be taken out of service? -
ANSWERS1
If high winds are expected and the lattice boom crane must be secured pointing into the wind, then the
hook should be: - ANSWERSSecured 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? - ANSWERS10 ft
During assembly where should you attach slings to lift boom sections. - ANSWERSEnd fittings
Which boom configuration can cause the most hazardous boom side-loading condition? - ANSWERSLong
boom with minimum radius
When is it safe to handle loads under power lines? - ANSWERSThe load nor any part of the crane can
come closer than regulations allow
On a lattice boom truck crane, boom angle is measured between the centerline of the: -
ANSWERSLoaded boom and the horizontal
When a lattice boom truck crane is lifting on outriggers, the floats or pads should always be: -
ANSWERSSecured to the outriggers
Manufacturer specifications permit only a certain amount of boom to be suspended out past the
connection point of the pendants during assembly or disassembly of the boom. The portion of the boom
that is suspended in this way is called the - ANSWERSCantilever length
2024/2025
The crane is out of level, you release the swing brake, the boom swings downhill, your: - ANSWERSLoad
radius increases
Blocking can be placed under the ends of tracks to: - ANSWERSIncrease the crane's stability when
operating over the front or back.
What quadrant produces the least amount of ground pressure on a lattice crawler: - ANSWERSSide
On lattice boom cranes fitted with power load lowering, a heavy load should be lowered by using the: -
ANSWERSPower load lowering feature and the foot brake
Abruptly stopping a rapid swing on a long-boom mobile crane will produce what major effect? -
ANSWERSOverturning the crane or collapsing the boom
When the boom handle is released to its center position, which action should be expected? -
ANSWERSThe boom hoist will be held stationary.
On a lattice boom crawler crane, the main boom length is measured from the: - ANSWERSCenter of the
boom heel pins to the center of the boom tip sheave.
If you can't level your crawler crane: - ANSWERSDon't operate it
What effect does having the crawlers retracted have on a crawler crane with a long boom? -
ANSWERSDecrease in capacity
Your crawler crane is on a barge, it is necessary to: - ANSWERSSecure 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? - ANSWERSLower
connection pins, located at and ahead of the equalizer.
When using a mobile crane on a barge, the cranes load capacity chart shall be: - ANSWERSReplaced by a
list chart
How many broken wires are permitted at the end of a pendant before it must be taken out of service? -
ANSWERS1
If high winds are expected and the lattice boom crane must be secured pointing into the wind, then the
hook should be: - ANSWERSSecured 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? - ANSWERS10 ft
During assembly where should you attach slings to lift boom sections. - ANSWERSEnd fittings
Which boom configuration can cause the most hazardous boom side-loading condition? - ANSWERSLong
boom with minimum radius
When is it safe to handle loads under power lines? - ANSWERSThe load nor any part of the crane can
come closer than regulations allow
On a lattice boom truck crane, boom angle is measured between the centerline of the: -
ANSWERSLoaded boom and the horizontal
When a lattice boom truck crane is lifting on outriggers, the floats or pads should always be: -
ANSWERSSecured to the outriggers
Manufacturer specifications permit only a certain amount of boom to be suspended out past the
connection point of the pendants during assembly or disassembly of the boom. The portion of the boom
that is suspended in this way is called the - ANSWERSCantilever length
