Page |1
Mobile Crane NCCER Study Guide
Questions with Detailed Verified Answers
(100% Correct Answers) /Already Graded
A+
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?
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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
What is the minimum design factor required for a right regular lay main boom or auxiliary hoist
rope?`
Ans: 3.5
How does the operator determine if the correct load chart is being used?
Ans: 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?
Ans: To be reduced
How does the operator verify the LMs boom length or load radius reading?
Ans: accutal measurements
If the rated capacity of the crane is above the solid line or within the shaded areas or has an asterisk
next to it this means the capacity is based on:
Ans: 85% tipping
Mobile Crane NCCER Study Guide
Questions with Detailed Verified Answers
(100% Correct Answers) /Already Graded
A+
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?
, Page |2
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
What is the minimum design factor required for a right regular lay main boom or auxiliary hoist
rope?`
Ans: 3.5
How does the operator determine if the correct load chart is being used?
Ans: 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?
Ans: To be reduced
How does the operator verify the LMs boom length or load radius reading?
Ans: accutal measurements
If the rated capacity of the crane is above the solid line or within the shaded areas or has an asterisk
next to it this means the capacity is based on:
Ans: 85% tipping
