Mobile Crane NCCER Study Guide
with Complete Solutions
When determining the "gross load" the best method is: - ANSWER - Get an accurate
load weight and add the rigging
By order of strength which is correct - ANSWER - Basket, Vertical, Choker
Primary purpose for a roster sheave or auxiliary boom point sheave is to: - ANSWER
- Separate the hoist line
When the number of layers of rope on a drum increase the : - ANSWER - Allowable
line pull decreases
What is the minimum allowable distance from the crane and power lines under
50kV? - ANSWER - 10'
Eccentric main boom tip reeving casues - ANSWER - twisting of the boom
How many randomly broken wires must there be to remove a running wire rope
from service? - ANSWER - 6
When working near power lines when is a signal person required? - ANSWER - When
crane moves within a booms length of power lines
When operating truck cranes what is the most unstable allowable quadrant of
operation? - ANSWER - Side
Tipping capacities of locomotive cranes are based on what % of tipping? - ANSWER -
85%
, Should the load be applied when determining the proper boom angle? - ANSWER -
YES
When making a multiple crane lift it is important for the operator to understand that
- ANSWER - the weight may increase if the other crane lands the load first
Most crane manufacturers reduce the load capacity for duty-cycle operations
because - ANSWER - side loading forces may occur
The proper way to calibrate a boom angle indicator is: - ANSWER - using a level,
raise the boom to horizontal and set the indicator at 0 degrees
What type of rope is recommended for a tagline around powerlines - ANSWER -
Polypropylene
what does two beeps of the horn indicate to people in the area - ANSWER - forward
Load radius is the distance from the center of gravity of the suspended load to the: -
ANSWER - Center of rotation
What is the purpose of using a boom extension? - ANSWER - Increase height
What do a jib and boom ext. have in common - ANSWER - Increase height
What is the minimum design factor required for a right regular lay main boom or
auxiliary hoist rope?` - ANSWER - 3.5
How does the operator determine if the correct load chart is being used? - ANSWER
- Matching serial numbers
with Complete Solutions
When determining the "gross load" the best method is: - ANSWER - Get an accurate
load weight and add the rigging
By order of strength which is correct - ANSWER - Basket, Vertical, Choker
Primary purpose for a roster sheave or auxiliary boom point sheave is to: - ANSWER
- Separate the hoist line
When the number of layers of rope on a drum increase the : - ANSWER - Allowable
line pull decreases
What is the minimum allowable distance from the crane and power lines under
50kV? - ANSWER - 10'
Eccentric main boom tip reeving casues - ANSWER - twisting of the boom
How many randomly broken wires must there be to remove a running wire rope
from service? - ANSWER - 6
When working near power lines when is a signal person required? - ANSWER - When
crane moves within a booms length of power lines
When operating truck cranes what is the most unstable allowable quadrant of
operation? - ANSWER - Side
Tipping capacities of locomotive cranes are based on what % of tipping? - ANSWER -
85%
, Should the load be applied when determining the proper boom angle? - ANSWER -
YES
When making a multiple crane lift it is important for the operator to understand that
- ANSWER - the weight may increase if the other crane lands the load first
Most crane manufacturers reduce the load capacity for duty-cycle operations
because - ANSWER - side loading forces may occur
The proper way to calibrate a boom angle indicator is: - ANSWER - using a level,
raise the boom to horizontal and set the indicator at 0 degrees
What type of rope is recommended for a tagline around powerlines - ANSWER -
Polypropylene
what does two beeps of the horn indicate to people in the area - ANSWER - forward
Load radius is the distance from the center of gravity of the suspended load to the: -
ANSWER - Center of rotation
What is the purpose of using a boom extension? - ANSWER - Increase height
What do a jib and boom ext. have in common - ANSWER - Increase height
What is the minimum design factor required for a right regular lay main boom or
auxiliary hoist rope?` - ANSWER - 3.5
How does the operator determine if the correct load chart is being used? - ANSWER
- Matching serial numbers
