, NCCCO Lattice Boom Crawler Crane
EXAM QUESTIONS AND ANSWERS 100%
CORRECT(GRADED A+)
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
What is the main purpose of mid point suspension pendants? - ANSWER To absorb
shock that comes with dynamic loading
The main purpose of a gantry or a mast on a crane is: - 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 - ANSWER Increases the probability of tipping
When using a mobile crane on a barge, the crane's load capacity chart shall be -
ANSWER Replaced by a list chart
Blocking can be placed under the ends of tracks to: - ANSWER Increase the crane's
stability when operating over the front or back
A crawler crane is based on ________ stability of static load. - ANSWER 75%
What quadrant produces the least amount of ground pressure on a lattice crawler -
ANSWER Side
When a crawler crane is on a barge, the list chart must be provided by the - ANSWER
Manufacturer
When operating a crawler crane, the ground pressure will always be highest over the -
ANSWER Corner
Unless working in loos soft soil, a crawler crane should always travel _____ on pick and
carry operations - ANSWER Towards the load
Why use mats of cribbing - ANSWER To reduce ground pressure
EXAM QUESTIONS AND ANSWERS 100%
CORRECT(GRADED A+)
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
What is the main purpose of mid point suspension pendants? - ANSWER To absorb
shock that comes with dynamic loading
The main purpose of a gantry or a mast on a crane is: - 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 - ANSWER Increases the probability of tipping
When using a mobile crane on a barge, the crane's load capacity chart shall be -
ANSWER Replaced by a list chart
Blocking can be placed under the ends of tracks to: - ANSWER Increase the crane's
stability when operating over the front or back
A crawler crane is based on ________ stability of static load. - ANSWER 75%
What quadrant produces the least amount of ground pressure on a lattice crawler -
ANSWER Side
When a crawler crane is on a barge, the list chart must be provided by the - ANSWER
Manufacturer
When operating a crawler crane, the ground pressure will always be highest over the -
ANSWER Corner
Unless working in loos soft soil, a crawler crane should always travel _____ on pick and
carry operations - ANSWER Towards the load
Why use mats of cribbing - ANSWER To reduce ground pressure
