Rigging Blue Star Pages Flashcards
(129 cards)
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3 parts of Voice signals ?
Function and direction
Distance and or speed
Function stop
89
Angle factors for rigging
90
Angle factors for rigging contin
91
Determine if the statement is true or false. The two types of wire rope center core designs are fiber core and independent wire rope core.
True
92
What is the percentage gain in strength when using an iwrc versus a fiber corps rope?
7.5
93
What characteristic increases in a wire rope by using a rope with more strands and more wires in the strands?
Flexibility
94
Determine if this statement is true or false. Grade 110/120 improved plow steel has the highest tensile strength of any rope?
False
95
A regular lay wire rope has strands and wires in the strands that?
Are laid in the opposite direction
96
Due to its tendency to unwind, which wire rope should not be used on single part hoisting lines?
Lang lay
97
Determine if this statement is true or false. A 6 x 19 wire rope classification could have as many as 16 to 26 wires per strand.
True
98
Which wire rope classification is listed as non- rotating?
35 strand.
99
When a non-rotating rope is used in a wedge care must be taken to prevent?
Core slippage
100
A rotation resistant wire rope may have a smaller working load limit ( SWL ) than an equal size 6 x 37 iwrc because:
Rotating resistant requires higher working load limit
101
When hoisting personnel on a crane equipped with rotating resistant wire rope what is the safety factor required by most safety standards?
10 : 1
102
Newer designs of wire rope with shaped wires and triangular strands are an attempt to prevent rope damage from?
Multiple drum layers
Cross winding
Improper tensioning.
103
Referring to the number of broken wires allowed in a wire rope. The "Rule of thumb" for determining placement is ?
3/6
104
Limits of approach
105
Quadrants of operation
106
What are some factors affecting crane capacity?
Poor machine condition
Improper use of outriggers
Soft footing
Crane not level.
107
List five conditions when a signaller would be required?
Power lines
Operator can't see load
Path of travel not visible
Landing area not visible
Person may be endangered by load.
108
Actual crane capacities are based on three factors. What are they?
Weight of the machine
Stability
Strength of components
109
Wire rope strands should be replaced if the wear in the outer strand of wire exceeds?
1/3 diameter
110
Determine If the following statement is true or false? When inspecting wire rope, interior broken wires and corrosion can be checked by magnetic particle testing.
True
111
Corrosion of wire rope is usually caused from
Lack of lubrication
112
Light mineral oil
113
To avoid kinking wire rope when spooling it onto a drum from the shipping reel the operator should always:
Allow the reel to rotate freely.
114
What is the rule of thumb formula to find the Ultimate load breaking strength of an iwrc wire rope?
D2 x 45
115
When the ultimate load of a wire rope is divided by the safety factor the result is called the?
Working load limit (SWL)
116
What happens when a wire rope is bent around a sheave or a hook?
Nominal strength is reduced
117
A 1 inch wire rope eye sling (no thimble) lifting a load with a 1 inch shackle will be approximately how efficient?
50%
118
Referring to slings, the terms Rated Capacity or Working Load limit replaces the old terminology of what?
Safe working load
119
What is the minimum Design Safety Factor for general sling use?
5 to 1
120
Determine if this statement is true or false. A 4 legged bridle sling will always carry the load weight equally on all 4 legs.
False
121
With an improved plow wire rope sling the preferred D/d basket hitch ratio is :
25 to 1
122
Determine if this statement is true or false. A sling wrapped around a rectangular load in a basket is rated at the full basket hitch working load limit.
False
123
When slinging a bundle of pipe or tuning, which of the following would provide the best contact between sling and load?
Two double wrap chokers
124
Determine if this statement is true or false. Synthetic slings can be safely used under any environmental circumstances.
False
125
Referring to the standard format of sling load charts the angle between the top of the load and the sling leg is called the ?
Horizontal angle
126
Using two slings to lift a load, at what degree angle to the horizontal is the load on each sling considered to be actual weight of the load?
30
127
What happens to the rigging hardware when sudden movements or shock loading occurs?
Increased load stress
128
Shackles are only rated for their maximum capacity when used for what type of pull?
Straight pull
129
Tapped hole must be how deep for eyebolt?
1 1/2 times the diameter of bolt
