Mobile Crane NCCER Study Guide
UPDATED ACTUAL Exam Questions and
CORRECT Answers
When determining the "gross load" the best method is: - CORRECT ANSWER Get an
accurate load weight and add the rigging
By order of strength which is correct - CORRECT ANSWER Basket, Vertical, Choker
Primary purpose for a roster sheave or auxiliary boom point sheave is to: - CORRECT
ANSWER Separate the hoist line
When the number of layers of rope on a drum increase the : - CORRECT
ANSWER Allowable line pull decreases
What is the minimum allowable distance from the crane and power lines under 50kV? -
CORRECT ANSWER 10'
Eccentric main boom tip reeving casues - CORRECT ANSWER twisting of the boom
How many randomly broken wires must there be to remove a running wire rope from service? -
CORRECT ANSWER 6
When working near power lines when is a signal person required? - CORRECT
ANSWER When crane moves within a booms length of power lines
When operating truck cranes what is the most unstable allowable quadrant of operation? -
CORRECT ANSWER Side
, Tipping capacities of locomotive cranes are based on what % of tipping? - CORRECT
ANSWER 85%
Should the load be applied when determining the proper boom angle? - CORRECT
ANSWER YES
What type of rope is recommended for a tagline around powerlines - CORRECT
ANSWER Polypropylene
what does two beeps of the horn indicate to people in the area - CORRECT
ANSWER forward
Load radius is the distance from the center of gravity of the suspended load to the: - CORRECT
ANSWER Center of rotation
What is the purpose of using a boom extension? - CORRECT ANSWER Increase height
What do a jib and boom ext. have in common - CORRECT ANSWER Increase height
What is the minimum design factor required for a right regular lay main boom or auxiliary hoist
rope?` - CORRECT ANSWER 3.5
How does the operator determine if the correct load chart is being used? - CORRECT
ANSWER Matching serial numbers
If the crane's jib is offset 5 degrees as opposed to an original 15 degrees and the boom angle
remains constant you would expect the load radius to do what? - CORRECT ANSWER To
be reduced
How does the operator verify the LMs boom length or load radius reading? - CORRECT
ANSWER accutal measurements
UPDATED ACTUAL Exam Questions and
CORRECT Answers
When determining the "gross load" the best method is: - CORRECT ANSWER Get an
accurate load weight and add the rigging
By order of strength which is correct - CORRECT ANSWER Basket, Vertical, Choker
Primary purpose for a roster sheave or auxiliary boom point sheave is to: - CORRECT
ANSWER Separate the hoist line
When the number of layers of rope on a drum increase the : - CORRECT
ANSWER Allowable line pull decreases
What is the minimum allowable distance from the crane and power lines under 50kV? -
CORRECT ANSWER 10'
Eccentric main boom tip reeving casues - CORRECT ANSWER twisting of the boom
How many randomly broken wires must there be to remove a running wire rope from service? -
CORRECT ANSWER 6
When working near power lines when is a signal person required? - CORRECT
ANSWER When crane moves within a booms length of power lines
When operating truck cranes what is the most unstable allowable quadrant of operation? -
CORRECT ANSWER Side
, Tipping capacities of locomotive cranes are based on what % of tipping? - CORRECT
ANSWER 85%
Should the load be applied when determining the proper boom angle? - CORRECT
ANSWER YES
What type of rope is recommended for a tagline around powerlines - CORRECT
ANSWER Polypropylene
what does two beeps of the horn indicate to people in the area - CORRECT
ANSWER forward
Load radius is the distance from the center of gravity of the suspended load to the: - CORRECT
ANSWER Center of rotation
What is the purpose of using a boom extension? - CORRECT ANSWER Increase height
What do a jib and boom ext. have in common - CORRECT ANSWER Increase height
What is the minimum design factor required for a right regular lay main boom or auxiliary hoist
rope?` - CORRECT ANSWER 3.5
How does the operator determine if the correct load chart is being used? - CORRECT
ANSWER Matching serial numbers
If the crane's jib is offset 5 degrees as opposed to an original 15 degrees and the boom angle
remains constant you would expect the load radius to do what? - CORRECT ANSWER To
be reduced
How does the operator verify the LMs boom length or load radius reading? - CORRECT
ANSWER accutal measurements
