NCCCO LATTICE BOOM CRAWLER CRANE EXAM QUESTIONS AND
ANSWERS
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
What is the main purpose of mid point suspension pendants? - CORRECT ANSWER✅✅To absorb shock
that comes with dynamic loading
The main purpose of a gantry or a mast on a crane is: - CORRECT ANSWER✅✅To increase the crane's
leverage on the boom
What effect does having the crawlers retracted have on a crawler crane with a long boom - CORRECT
ANSWER✅✅Increases the probability of tipping
When using a mobile crane on a barge, the crane's load capacity chart shall be - CORRECT
ANSWER✅✅Replaced by a list chart
Blocking can be placed under the ends of tracks to: - CORRECT ANSWER✅✅Increase the crane's
stability when operating over the front or back
A crawler crane is based on ________ stability of static load. - CORRECT ANSWER✅✅75%
What quadrant produces the least amount of ground pressure on a lattice crawler - CORRECT
ANSWER✅✅Side
When a crawler crane is on a barge, the list chart must be provided by the - CORRECT
ANSWER✅✅Manufacturer
When operating a crawler crane, the ground pressure will always be highest over the - CORRECT
ANSWER✅✅Corner
, Unless working in loos soft soil, a crawler crane should always travel _____ on pick and carry operations
- CORRECT ANSWER✅✅Towards the load
Why use mats of cribbing - CORRECT ANSWER✅✅To reduce ground pressure
Mats are usually _____ to hold together. - CORRECT ANSWER✅✅Bolted
A crawler crane traveling forward is defined as traveling in the direction of - CORRECT ANSWER✅✅The
idler
When disassembling or assembling booms on lattice boom cranes, it is extremely important to -
CORRECT ANSWER✅✅Never touch any pin on any boom section located between the pendant
attachment points and the crane
On a lattice boom crane, the device that automatically stops the boom when it nears the maximum
angle is the - CORRECT ANSWER✅✅Boom hoist kick out
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
Manufacture specs only permit a certain amount of boom to be suspended out past the connection
point of the pendants during assembly or disassembly of the boom. This portion of boom is called the -
CORRECT ANSWER✅✅Cantilever Length
When installing a pin-connected lattice boom on a mobile crane, you should always - CORRECT
ANSWER✅✅Use the boom hoist pawl to hold the boom
When making a lift with a lattice boom crawler crane, ground pressure can be reduced by lifting over the
- CORRECT ANSWER✅✅Side
Pendant spreader bars on long booms are used to prevent - CORRECT ANSWER✅✅Main pendants from
scrubbing the boom sides
ANSWERS
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
What is the main purpose of mid point suspension pendants? - CORRECT ANSWER✅✅To absorb shock
that comes with dynamic loading
The main purpose of a gantry or a mast on a crane is: - CORRECT ANSWER✅✅To increase the crane's
leverage on the boom
What effect does having the crawlers retracted have on a crawler crane with a long boom - CORRECT
ANSWER✅✅Increases the probability of tipping
When using a mobile crane on a barge, the crane's load capacity chart shall be - CORRECT
ANSWER✅✅Replaced by a list chart
Blocking can be placed under the ends of tracks to: - CORRECT ANSWER✅✅Increase the crane's
stability when operating over the front or back
A crawler crane is based on ________ stability of static load. - CORRECT ANSWER✅✅75%
What quadrant produces the least amount of ground pressure on a lattice crawler - CORRECT
ANSWER✅✅Side
When a crawler crane is on a barge, the list chart must be provided by the - CORRECT
ANSWER✅✅Manufacturer
When operating a crawler crane, the ground pressure will always be highest over the - CORRECT
ANSWER✅✅Corner
, Unless working in loos soft soil, a crawler crane should always travel _____ on pick and carry operations
- CORRECT ANSWER✅✅Towards the load
Why use mats of cribbing - CORRECT ANSWER✅✅To reduce ground pressure
Mats are usually _____ to hold together. - CORRECT ANSWER✅✅Bolted
A crawler crane traveling forward is defined as traveling in the direction of - CORRECT ANSWER✅✅The
idler
When disassembling or assembling booms on lattice boom cranes, it is extremely important to -
CORRECT ANSWER✅✅Never touch any pin on any boom section located between the pendant
attachment points and the crane
On a lattice boom crane, the device that automatically stops the boom when it nears the maximum
angle is the - CORRECT ANSWER✅✅Boom hoist kick out
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
Manufacture specs only permit a certain amount of boom to be suspended out past the connection
point of the pendants during assembly or disassembly of the boom. This portion of boom is called the -
CORRECT ANSWER✅✅Cantilever Length
When installing a pin-connected lattice boom on a mobile crane, you should always - CORRECT
ANSWER✅✅Use the boom hoist pawl to hold the boom
When making a lift with a lattice boom crawler crane, ground pressure can be reduced by lifting over the
- CORRECT ANSWER✅✅Side
Pendant spreader bars on long booms are used to prevent - CORRECT ANSWER✅✅Main pendants from
scrubbing the boom sides
