Mobile Crane NCCER
Mobile Crane NCCER Study Guide 2025
In a two crane lift the center of gravity should be -Correct Answer ✔Closer to the crane
with the greatest capacity
For rubber-tired cranes working on rubber, the part of the load chart governed by
stability is based on what % of the crane's capacity? -Correct Answer ✔75%
As a general rue on tandem crane lifts neither crane should be loaded greater than what
% of net capacity -Correct Answer ✔75%
On long boom cranes, what is the major effect of abruptly stopping a rapid swing? -
Correct Answer ✔Action may overturn the crane or collapse the boom
The most important thing to remember when performing dual crane lifts is: -Correct
Answer ✔The cranes should not be loaded beyond 75% of their rated capacity
The total weight of a loaded personnel platform and related rigging shall not exceed
what % of the rated capacity for the radius and configuration of a crane or derrick -
Correct Answer ✔50%
Pre-operational inspections are necessary and required: -Correct Answer ✔Enhance
cranes safety by discovering discrepancies prior to operating.
If a crane has to be level to within 1% of grade, the maximum allowable variation in
grade in a horizontal distance of 20' would be: -Correct Answer ✔2.4''
Mobile Crane NCCER
, Mobile Crane NCCER
On a standard running rope, how many broken wires are cause for considering
replacement? -Correct Answer ✔3 broken wires in one strand in one lay
On a standing rope, how many wires need to be broken at an end connections before
replacing? -Correct Answer ✔2
According to ASME B30.5, mobile crane standard, how many randomly distributed
broken wires in rotation- resistant- rope is cause for considering replacement of the
rope? -Correct Answer ✔2 broken wire in 6 rope diameters
The lay length of a wire rope is defined as -Correct Answer ✔Distance of one strand as it
makes one revolutions
which of the following signifies the grade of steel used in wire rope? -Correct Answer
✔XIP (Extra Improved Plow Steel)
Which end fitting has the highest efficiency rating? -Correct Answer ✔Swaged Sockets
Which hitch provides the greatest lifting capacity? -Correct Answer ✔Basket Hitch
When placing a shackle on a crane hook the correct procedure is: -Correct Answer
✔Place the shackle pin in the hook
Its time to replace wire rope when_______% of the diameter of outside wire is worn
away? -Correct Answer ✔5%
Never use a fiber core wire rope when working in temperatures exceed: -Correct Answer
✔180 degrees
Mobile Crane NCCER
Mobile Crane NCCER Study Guide 2025
In a two crane lift the center of gravity should be -Correct Answer ✔Closer to the crane
with the greatest capacity
For rubber-tired cranes working on rubber, the part of the load chart governed by
stability is based on what % of the crane's capacity? -Correct Answer ✔75%
As a general rue on tandem crane lifts neither crane should be loaded greater than what
% of net capacity -Correct Answer ✔75%
On long boom cranes, what is the major effect of abruptly stopping a rapid swing? -
Correct Answer ✔Action may overturn the crane or collapse the boom
The most important thing to remember when performing dual crane lifts is: -Correct
Answer ✔The cranes should not be loaded beyond 75% of their rated capacity
The total weight of a loaded personnel platform and related rigging shall not exceed
what % of the rated capacity for the radius and configuration of a crane or derrick -
Correct Answer ✔50%
Pre-operational inspections are necessary and required: -Correct Answer ✔Enhance
cranes safety by discovering discrepancies prior to operating.
If a crane has to be level to within 1% of grade, the maximum allowable variation in
grade in a horizontal distance of 20' would be: -Correct Answer ✔2.4''
Mobile Crane NCCER
, Mobile Crane NCCER
On a standard running rope, how many broken wires are cause for considering
replacement? -Correct Answer ✔3 broken wires in one strand in one lay
On a standing rope, how many wires need to be broken at an end connections before
replacing? -Correct Answer ✔2
According to ASME B30.5, mobile crane standard, how many randomly distributed
broken wires in rotation- resistant- rope is cause for considering replacement of the
rope? -Correct Answer ✔2 broken wire in 6 rope diameters
The lay length of a wire rope is defined as -Correct Answer ✔Distance of one strand as it
makes one revolutions
which of the following signifies the grade of steel used in wire rope? -Correct Answer
✔XIP (Extra Improved Plow Steel)
Which end fitting has the highest efficiency rating? -Correct Answer ✔Swaged Sockets
Which hitch provides the greatest lifting capacity? -Correct Answer ✔Basket Hitch
When placing a shackle on a crane hook the correct procedure is: -Correct Answer
✔Place the shackle pin in the hook
Its time to replace wire rope when_______% of the diameter of outside wire is worn
away? -Correct Answer ✔5%
Never use a fiber core wire rope when working in temperatures exceed: -Correct Answer
✔180 degrees
Mobile Crane NCCER
