Mobile Crane Questions Test #3 UPDATED
ACTUAL Exam Questions and CORRECT
Answers
The crane is out of level, you release the swing brake, the boom swings downhill, your: -
CORRECT ANSWER Load radius increases.
Blocking can be placed under the ends of tracks to: - CORRECT 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? - CORRECT
ANSWER Side.
On lattice boom cranes fitted with power load lowering, a heavy load should be lowered by using
the: - CORRECT ANSWER Powerload-lowering feature and the foot brake.
Abruptly stopping a rapid swing on a long boom mobile crane will produce what major effect? -
CORRECT ANSWER Overturning the crane or collapsing the boom.
When the boom handle is released to its center position, which action should be expected? -
CORRECT ANSWER The boom hoist will be held stationary.
On a lattice boom crawler crane, the main boom length is measured from the: - CORRECT
ANSWER Center of the boom heel pins to the center of the boom tip sheave.
You can't level your crawler crane: - CORRECT ANSWER Don't operate the crane.
What effect does having the crawlers retracted have on a crawler crane with a long boom? -
CORRECT ANSWER Decrease in capacity.
, Your crawler crane is on a barge, it is necessary to: - CORRECT 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? -
CORRECT 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: - CORRECT
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? - CORRECT ANSWER 1.
If high winds are expected and the lattice boom crane must be secured pointing into the wind,
then the hook should be: - CORRECT 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? - CORRECT ANSWER 10 ft.
During assembly, where should you attach slings to lift boom sections? - CORRECT
ANSWER End fittings.
Which boom configuration can cause the most hazardous boom side-loading condition? -
CORRECT ANSWER Long boom with minimum radius.
When is it safe to handle loads under power lines? - CORRECT ANSWER The 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 center-line of the: -
CORRECT ANSWER Loaded boom and the horizontal.
ACTUAL Exam Questions and CORRECT
Answers
The crane is out of level, you release the swing brake, the boom swings downhill, your: -
CORRECT ANSWER Load radius increases.
Blocking can be placed under the ends of tracks to: - CORRECT 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? - CORRECT
ANSWER Side.
On lattice boom cranes fitted with power load lowering, a heavy load should be lowered by using
the: - CORRECT ANSWER Powerload-lowering feature and the foot brake.
Abruptly stopping a rapid swing on a long boom mobile crane will produce what major effect? -
CORRECT ANSWER Overturning the crane or collapsing the boom.
When the boom handle is released to its center position, which action should be expected? -
CORRECT ANSWER The boom hoist will be held stationary.
On a lattice boom crawler crane, the main boom length is measured from the: - CORRECT
ANSWER Center of the boom heel pins to the center of the boom tip sheave.
You can't level your crawler crane: - CORRECT ANSWER Don't operate the crane.
What effect does having the crawlers retracted have on a crawler crane with a long boom? -
CORRECT ANSWER Decrease in capacity.
, Your crawler crane is on a barge, it is necessary to: - CORRECT 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? -
CORRECT 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: - CORRECT
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? - CORRECT ANSWER 1.
If high winds are expected and the lattice boom crane must be secured pointing into the wind,
then the hook should be: - CORRECT 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? - CORRECT ANSWER 10 ft.
During assembly, where should you attach slings to lift boom sections? - CORRECT
ANSWER End fittings.
Which boom configuration can cause the most hazardous boom side-loading condition? -
CORRECT ANSWER Long boom with minimum radius.
When is it safe to handle loads under power lines? - CORRECT ANSWER The 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 center-line of the: -
CORRECT ANSWER Loaded boom and the horizontal.
