UA Rigging (Blackboard Quizzes): Questions/Solutions
A(n) ___ knot is the first step in making a back splice. Right Ans - crown
A knot has only ___ percent of the strength of the rope. Right Ans - 50 to 60
A ___ is formed by simply bending the rope and keeping the sides parallel.
Right Ans - bight
A(n) ___ knot is the best knot to use to keep the end of a rope or fall from
running out of a tackle or pulley. Right Ans - figure eight
A ___ is primarily used to finish off other knots and should not be used by itself
for lifting. Right Ans - half hitch
A(n) ___ knot is used for tying together two dry ropes of the same size and for
tying the two ends of a rope together when used for backlashing. Right Ans
- square
A ___ hitch is used for attaching the end of a rope to an object for a right-angle
pull, as in the case of guy lines. Right Ans - clove
A ___ will not slip or draw tight under heavy loads. Right Ans - double sheet
bend
A ___ is used to attach a hook such as a tackle block at any point on a rope
between its ends. Right Ans - catspaw knot
A ___ hitch is used to hold a load or to lower a heavy load slowly. Right Ans -
snubbing
The total length of rope needed for making a ___ hitch equals two barrel
lengths, plus one circumference, plus four diameters. Right Ans - barrel
Improved plow steel (IPS) has an average tensile strength of ___ pounds per
square inch. Right Ans - 240,000
When wire rope has a natural finish, it is referred to as ___ finish. Right Ans
- bright
, Any number of strands may be laid around a core; by far the greatest number
of wire ropes made have ___ strands wound around a core. Right Ans - six
The ___ classification usually has seven wires per strand and is referred to as
coarse laid rope. Right Ans - 6 x 7
A rope is said to be ___ lay rope if the wires in the strands are wound in the
same direction as the strands are wound around the core. Right Ans - lang
The ___ construction strand has the same number of outer and inner wires.
Right Ans - seale
Wire rope is designated by the ___. Right Ans - diameter at its widest point
___ wraps of the seizing wire around a wire rope are recommended for seizing.
Right Ans - 8
Discard a fitting if the hook opening has increased by ___ percent from new.
Right Ans - 10
Wear on any individual wire must not exceed ___ of the original wire diameter.
Right Ans - one-third
Multiple-part slings are referred to as ___ slings or spreaders and are made up
of two, three, or four single-part slings placed on a master link Right Ans -
bridle
___ rope should be light in color with a silvery or pearl luster and a waxy
surface. Right Ans - Manila
Polypropylene rope is about ___ times stronger than manila rope. Right Ans
- 1 3/4
___ rope is manufactured in "film" form rather than extruded filaments and
then shredded into fine strips to form fibers. Right Ans - Mylar
Sizes of rope used in the piping industry are designated as ___. Right Ans -
diameters
A(n) ___ knot is the first step in making a back splice. Right Ans - crown
A knot has only ___ percent of the strength of the rope. Right Ans - 50 to 60
A ___ is formed by simply bending the rope and keeping the sides parallel.
Right Ans - bight
A(n) ___ knot is the best knot to use to keep the end of a rope or fall from
running out of a tackle or pulley. Right Ans - figure eight
A ___ is primarily used to finish off other knots and should not be used by itself
for lifting. Right Ans - half hitch
A(n) ___ knot is used for tying together two dry ropes of the same size and for
tying the two ends of a rope together when used for backlashing. Right Ans
- square
A ___ hitch is used for attaching the end of a rope to an object for a right-angle
pull, as in the case of guy lines. Right Ans - clove
A ___ will not slip or draw tight under heavy loads. Right Ans - double sheet
bend
A ___ is used to attach a hook such as a tackle block at any point on a rope
between its ends. Right Ans - catspaw knot
A ___ hitch is used to hold a load or to lower a heavy load slowly. Right Ans -
snubbing
The total length of rope needed for making a ___ hitch equals two barrel
lengths, plus one circumference, plus four diameters. Right Ans - barrel
Improved plow steel (IPS) has an average tensile strength of ___ pounds per
square inch. Right Ans - 240,000
When wire rope has a natural finish, it is referred to as ___ finish. Right Ans
- bright
, Any number of strands may be laid around a core; by far the greatest number
of wire ropes made have ___ strands wound around a core. Right Ans - six
The ___ classification usually has seven wires per strand and is referred to as
coarse laid rope. Right Ans - 6 x 7
A rope is said to be ___ lay rope if the wires in the strands are wound in the
same direction as the strands are wound around the core. Right Ans - lang
The ___ construction strand has the same number of outer and inner wires.
Right Ans - seale
Wire rope is designated by the ___. Right Ans - diameter at its widest point
___ wraps of the seizing wire around a wire rope are recommended for seizing.
Right Ans - 8
Discard a fitting if the hook opening has increased by ___ percent from new.
Right Ans - 10
Wear on any individual wire must not exceed ___ of the original wire diameter.
Right Ans - one-third
Multiple-part slings are referred to as ___ slings or spreaders and are made up
of two, three, or four single-part slings placed on a master link Right Ans -
bridle
___ rope should be light in color with a silvery or pearl luster and a waxy
surface. Right Ans - Manila
Polypropylene rope is about ___ times stronger than manila rope. Right Ans
- 1 3/4
___ rope is manufactured in "film" form rather than extruded filaments and
then shredded into fine strips to form fibers. Right Ans - Mylar
Sizes of rope used in the piping industry are designated as ___. Right Ans -
diameters
