Mobile Crane NCCER Study Guide
Graded A Practice Question 2025
When determining the "gross load" the best method is: - ANS Get an accurate load
weight and add the rigging
By order of strength which is correct - ANS Basket, Vertical, Choker
Primary purpose for a roster sheave or auxiliary boom point sheave is to: - ANS
Separate the hoist line
When the number of layers of rope on a drum increase the : - ANS Allowable line pull
decreases
What is the minimum allowable distance from the crane and power lines under 50kV? -
ANS 10'
Eccentric main boom tip reeving casues - ANS twisting of the boom
How many randomly broken wires must there be to remove a running wire rope from
service? - ANS 6
When working near power lines when is a signal person required? - ANS When crane
moves within a booms length of power lines
When operating truck cranes what is the most unstable allowable quadrant of
operation? - ANS Side
Tipping capacities of locomotive cranes are based on what % of tipping? - ANS 85%
Should the load be applied when determining the proper boom angle? - ANS YES
What type of rope is recommended for a tagline around powerlines - ANS
Polypropylene
what does two beeps of the horn indicate to people in the area - ANS forward
Load radius is the distance from the center of gravity of the suspended load to the: -
ANS Center of rotation
What is the purpose of using a boom extension? - ANS Increase height
What do a jib and boom ext. have in common - ANS Increase height
