crane test Exam/70 Complete Questions
and Answers (To study for ct crane
operators test)
Side loading can occur when: - -The crane is out of level, during rapid swing,
dragging or pulling loads sideways, improperly performed tilt-up operations,
or high winds
-Crane's leverage - -Crane weight times the horizontal distance from the
center of gravity to the tipping axis
-Load's leverage - -The horizontal distance from the center of gravity of the
load to the tipping axis times the load weight
-Margin of stability for crawler mounted cranes - -75%
-Margin of stability for carrier mounted cranes - -On outriggers extended
85%
On rubber or tires 75%
-Margin of stability for commercial boom trucks - -85%
-Backward stability factors - -Operating over the side, no load, shortest
boom length maximum boom angle, and load on wheels
-Overloading the crane will cause: - -Crane tipping or structural failure
-Capacity charts are normally divided by: - -Using a bold line, asterisks, or
shaded area
-Structural strength is found on the top or bottom of the capacity chart - -
Top
-Stability is found on the top or bottom of the capacity chart - -Bottom
-What component can fail when operating in the structural area of the
capacity chart - -Wire rope, boom, block, sheave, boom extension cylinder,
boom lift cylinder, ring gear, hydraulic hoses, outriggers, jib, jib pendants, jib
mast, boom pendants,...
-If boom length is between chart listings you should: - -Always use lower
capacity of the next longer or shorter boom length
, -Load radius is: - -The horizontal distance from the center of rotation to the
center line of the hook
-If load radius is between chart listings you should: - -Use the next longer
radius
-Boom angle is: - -The angle between the center line of the base boom and
the horizontal after the load is lifted
-Boom deflection will: - -Decrease boom angle and increase load radius
-Tire deflection will: - -Increase the load radius and decrease the boom
angle
-If boom angle is between chart listings you should: - -Use the next lower
boom angle
-Gross capacities are: - -The rated capacities listed in the capacity chart
-What may need to be deducted - -Wire rope, ball, jib, load block, rigging,
net load, stowed jib, EXT., AUX. Boom head,...
-When do you deduct weight of the crane's hoist rope - -When the
manufacturer specifies in the load chart, when the crane is reeved with more
then the minimum parts of line required, when the crane is reeved with hoist
line not being used to make the lift, or when there are parts of line below the
ground
-Net capacity is: - -Gross capacity minus capacity deductions for load
handling devices
-Gross load is: - -The net load plus the attachments, lifting devices, hook,
blocks, balls, wire rope, and Rigging
-Net load is: - -The actual weight of the item being lifted
-Dynamic loading is: - -The forces created by movement
-Total load is: - -The combined forces produced by the actual load weight,
lifting attachments, and the movement of the load and attachments
-Capacity is limited by: - -The lowest rated component
-Parts of line is: - -The number of hoist ropes directly supporting the lower
load block
and Answers (To study for ct crane
operators test)
Side loading can occur when: - -The crane is out of level, during rapid swing,
dragging or pulling loads sideways, improperly performed tilt-up operations,
or high winds
-Crane's leverage - -Crane weight times the horizontal distance from the
center of gravity to the tipping axis
-Load's leverage - -The horizontal distance from the center of gravity of the
load to the tipping axis times the load weight
-Margin of stability for crawler mounted cranes - -75%
-Margin of stability for carrier mounted cranes - -On outriggers extended
85%
On rubber or tires 75%
-Margin of stability for commercial boom trucks - -85%
-Backward stability factors - -Operating over the side, no load, shortest
boom length maximum boom angle, and load on wheels
-Overloading the crane will cause: - -Crane tipping or structural failure
-Capacity charts are normally divided by: - -Using a bold line, asterisks, or
shaded area
-Structural strength is found on the top or bottom of the capacity chart - -
Top
-Stability is found on the top or bottom of the capacity chart - -Bottom
-What component can fail when operating in the structural area of the
capacity chart - -Wire rope, boom, block, sheave, boom extension cylinder,
boom lift cylinder, ring gear, hydraulic hoses, outriggers, jib, jib pendants, jib
mast, boom pendants,...
-If boom length is between chart listings you should: - -Always use lower
capacity of the next longer or shorter boom length
, -Load radius is: - -The horizontal distance from the center of rotation to the
center line of the hook
-If load radius is between chart listings you should: - -Use the next longer
radius
-Boom angle is: - -The angle between the center line of the base boom and
the horizontal after the load is lifted
-Boom deflection will: - -Decrease boom angle and increase load radius
-Tire deflection will: - -Increase the load radius and decrease the boom
angle
-If boom angle is between chart listings you should: - -Use the next lower
boom angle
-Gross capacities are: - -The rated capacities listed in the capacity chart
-What may need to be deducted - -Wire rope, ball, jib, load block, rigging,
net load, stowed jib, EXT., AUX. Boom head,...
-When do you deduct weight of the crane's hoist rope - -When the
manufacturer specifies in the load chart, when the crane is reeved with more
then the minimum parts of line required, when the crane is reeved with hoist
line not being used to make the lift, or when there are parts of line below the
ground
-Net capacity is: - -Gross capacity minus capacity deductions for load
handling devices
-Gross load is: - -The net load plus the attachments, lifting devices, hook,
blocks, balls, wire rope, and Rigging
-Net load is: - -The actual weight of the item being lifted
-Dynamic loading is: - -The forces created by movement
-Total load is: - -The combined forces produced by the actual load weight,
lifting attachments, and the movement of the load and attachments
-Capacity is limited by: - -The lowest rated component
-Parts of line is: - -The number of hoist ropes directly supporting the lower
load block
