Test 1 Flashcards
The loaded radius as shown on the capacity chart is the distance from the center of rotation to the centerline of the vertical hoist line with_____
The rated load suspended
If the jib angle to the ground is changed from 50° to 40° how would this affect the capacity of the crane
Capacity will decrease
Who is required to approve crane set up prior to its use
Crane operator
The operator should exercise extreme caution when lifting loads from the water mainly because
The load on the crane will increase as an object leaves the water
The surface giving the best possible reading when leveling a crane would be located
On the superstructure
When working on soft soil with poor bearing support:
Use matting to distribute the cranes wait over a large area
The best way to determine the weight of a load to be lifted is to:
Have a certified load weight and add in the weight of all rigging
When a situation arises that will not permit out Riggers to be set at positions that correspond to the locations established by the manufactures load rating charts, the crane manufacturer shall be consulted to determine if any capacity reductions, special operations procedures, or limitations are required. If the required information is not available from the manufacturer who shall be consulted?
Qualified person
When performing a Pickin carry operation using a mobile crane, the load Shall be position:
Over the front
A thick dark in line running across the load chart means that the load ratings:
Above the lines are limited by structural factors
Dynamic motion such as swinging with a load can cause what change in the crane operation?
Increased load radius
Before making a near capacity left with the crane the operator must:
Test the hoist breaks by lifting the load a few inches and holding it
A work area chart is used to:
Identify capacity changes due to operational quadrants
Which of the following three sling hitches are listed in order from the strongest to the weakest?
Basket, vertical, choker
If your crane needs to be re-spooled due to a slack rope condition what should be done?
Remove slack before starting the lift
The minimum distance for safety between the swing radius of the counterweight and any obstacle is:
2 feet
What is the best source of information for determining boom tip height
Working range diagram
Attachments or extra counter way it’s not approved by the manufacture should not be attached to the rear of the crane because of?
They may cause a backwards stability problem
If lifting a load with two cranes of different rate of capacities the crane with the larger really capacity should:
Be hooked at a distance closer to the loads center of gravity
The only time the out rigor beams should be less than fully extended is when:
The load chart indicates that it is allowed
The boom angle indicator shows boom angle in reference to the capacity chart:
Is used along with the boom length to determine radius
On a telescopic crane when is the boom a deduction
Never a deduction
The drum flange shall extend a minimum of _____over the top layer of the rope at all times
Half inch
In running ropes other than rotation resistant rope what is the number of Randomly distributed broken wires in LA of rope that would require it to be replaced
Six broken wires
When an extension jib is erected on the boom tip when does it become a deduction?
When not in use
The backwards to ability of the crane is tested with the basic boom at?
Maximum angle with no load
When rotation of the load may be hazardous the operator should:
Verify that a tagline is used
Which of the following could be most dangerous when working a crane near a newly constructed building?
Non-compacted soil covering underground utilities
And auxiliary boom head or rooster Sheave is intended to be used with:
A whip line
If the cranes power fails during operation the operator should:
Set all brakes and locking devices
Wire rope lubricant should not:
Hinder a visual inspection
What is one of the most common effects of boom sideloading
Structural failure
As per ANSI B30.5, How many full wraps of rope are required on the hoist rum when the hook is an extreme low position
Two full wraps
Construction site hazards and restrictions such as electric power and piping are located and identified by?
Preoperational work site inspection
If a machine is not level and then swings a load from the high side to the low side the load radius will:
Increase
Which of the following will not cause a two block in condition on hoist lines
Raising the boom
And example of duty cycle crane operations would be:
High-volume concrete placement
When load radius is between radii values the operator must use the
Longer radius
What determines the suitability of the supporting surface to handle all expected loads during Cran operation
Voids, tanks, loose Fill, depressions
The phrase “part of line” Means:
The number of individual line supporting the load block
On most mobile cranes the least stable position as when the boom is directly over:
A corner
Multiple load line operation shall only be permitted when the equipment and procedures required by the ASME B30.5 And those required by the crane manufacturer or_____are applied
Qualified person
On a load chart the difference between the structural reading in the stability rating are:
Indicated by bald lines, shaded areas, or Asterisks
What is the minimum clearance distance when working around powerlines of 600 KV
35 feet
Mobile crane’s that are set up on barges she’ll have a list chart provided by which of the entities listed below
Crane manufacturer
The best way to determine if there is sufficient clearance for outriggers and tail swing is to:
Take accurate measurements
How often is a competent person required to inspect the running wire rope on a mobile crane
Each shift
An operator working in a new construction area should confirm the surfaces stability to support anticipated loads by:
Consulting the site supervisor
If you have an operational aid that needs repaired, how much time after the receipt of the part does the repair have to be made
Seven days
If a load moment indicator device indicates that the working radius is 45 feet how would the crane operator verify this
By physically measuring the radius
How does Highwind affect a mobile crane with a long boom?
Introduce his side load onto the boom
When a jib is erected, But not in use for a lift, it is treated as a deduction from the cranes:
Gross capacity
Of the following what information must be marked on a lifting been
Weight of the lifting beam and permitted working load
A description of line pull is the:
Amount of weight a drum will hoist for any given layer
If a crane contacts a powerline and the operator is unable to break contact, he or she should immediately:
Instruct all personnel to stay away from the crane, ropes, and load
When using an insulating link on a crane your power lines:
Minimum clearance must still be maintained
Which of the following sources can be used to find out the maximum width of a crane with the out rigers/stabilizers fully extended
The crane manufacturers manual
Of the following, which allows a part of the boom or load to operate closer to powerlines than a minimum clearance
Transmissions lines that are De-energized and grounded
Which of the following is the most important factor consider about site access
Compaction
A crane’s neck capacity should be the same as the
Manufacturers load ratings minus all deductions
A load Sharp does not list the weight limit for each part of the line; if the line pole is 8000 pounds how many parts would be necessary to lift 38,320 pounds
Five
Why does rotation resistant wire rope need to have special attention during inspections
High susceptibility to damage
As rope spoils on to the hoist drums of a crane, available line pull:
Decreases
Any powerline is considered energized unless the:
Electrical utility authority verifies that it is not energized
When working on tires on a rough terrain, backward tipping is most likely to occur when working over the
Side at a short radius
During a shift inspection, what is required to be inspected?
Operational aids, operating controls, ground conditions, and level condition
He suspended personnel platform should not be used when the wind exceeds:
20 mph
What would you consider the load block or ball, rigging, and load to be
Gross load
According to OSHA table A, The minimum distance between any part of the crane we’re load and a powerline read it at 50 KV is:
10 feet
Which of the following should be done before an actual operation begins?
Have a pre-left a meeting
A critical item to control for a two crane lift is the:
Maintain vertical hoist lines
Hoist ropes, other than rotation resistance ropes, must have a minimum design factor of:
3.5
The super structure of a crane is the:
Entire upper works above the rotation bearing
How does an operator determine the recommended wrote for the crane
By reading the manufacturers load chart or operators manual
If an operator cannot clearly read the crane slow chart due to a quality of print it is necessary to
Obtain a new chart by model and serial number
Unless otherwise stated, the standard rope used on most cranes is
Right regular lay
How large of an area should be barricaded off when setting up a crane in a location to which the public has access
The working radius of the crane
When lifting personnel with a mobile crane, under planned conditions of use, the load rating chart capacity must be reduced by at least:
50%
What taglines should not be used near powerlines
Small diameter wire rope
Starting and stopping the swing of a crane to quickly will cause:
Side loading up the boom
Before leaving a crane on attended, the operator should:
Land any load or lifting device
The proper procedure for calibrating the boom angle indicator is to:
Raise the boom to horizontal (using a level on the boom) And set the indicator to zero
The primary function of a boom extension or jib is to:
Increase the length
Each out rigger pad and or blocking should be sufficient to support?
The total weight of the crane and it load
All hazards and problems that are found on the worksite should be identified:
At the proportional work site inspection
A crane 3° out of level can decrease capacity as much as much as
50%
The best way to detect the presence of underground natural gas pipes is to
Check with local utility companies
When performing basic load rating procedures from a two point hook up, and measuring the angle from horizontal it is very important to remember that the:
Lower the sling angle the greater tension
According to the B 30.5, a signal person is required to observe powerlines when the crane is within:
A booms length of the limit of approach
The most effective method for preventing people from being crushed between an obstacle in the counter way is to:
Barricade Or fence off the swing area
In general, radius, as determined in the load charts of cranes, refers to the distance from the center of gravity of a freely suspended load to the:
Center of rotation
When leveling a mobile crane on out Riggers, and operator should ensure:
The crane is raised free of crane wait on any tires
If a crane comes in contact with the powerline it is critical that everyone be kept away from the crane, the load line, and the load because:
All three can become energized, including the ground around the crane
Increasing the distance from the Cran center of gravity to the tipping axis will have what effect on the crane
Increased stability
Unbalanced reading of boom tip sheaves may cause:
Torsion or twisting of the boom
According to the B 30.5, determining the correct way of the load to be lifted by a crane is the responsibility of the:
Site supervisor
When a jib is installed on a boom tip, but it’s not used, what weight must be deducted from the cranes gross capacity to Determine the neck capacity
Effective weight of the jib
If your LMI system quits working, the crane still can be used if_________
Crane or LMI manufacturer says it’s OK
