IPT Crane and Rigging Answer Book Latest With Complete
Solutions 100% Verified
Two types of wire rope center core designs - ANSWER Fiber core and independent wire
rope core
What is the percentage gain in strength using an IWRC versus a fiber core wire rope? -
ANSWER 7.5
What characteristic increases in a wire rope by using a rope with more strands and
more wires in the strands? - ANSWER Flexibility
Grade 110/120 Improved Plow Steel has the highest tensile strength of any type of wire
rope. - ANSWER False-it has lower tensile strength
A regular lay wire rope has strands and wires in the strands that: - ANSWER Are laid in
opposite directions
Due to its tendency to unwind, which wire rope should NOT be used on a single part
hoisting lines? - ANSWER Lang lay
A 6x19 wire rope classification could have as many as 16 to 26 wires per strand. -
ANSWER True
Which wire rope classification is listed as non-rotating? - ANSWER 35 strand
When a non-rotating rope is used in a wedge socket, care must be taken to prevent: -
ANSWER Core slippage
, A rotation resistant wire rope may have a smaller working load limit than an equal size
6x37 IWRC because: - ANSWER -IWRC has a higher breaking strength
-rotating resistant requires higher working load limit
When hoisting personnel on a crane equipped with rotating resistant wire rope, what is
the design factor required by most safety standards? - ANSWER 10:1
Newer designs of wire rope with shapes wires and triangular strands are an attempt to
prevent rope damage from: - ANSWER -multiple drum layers
-cross winding
-improper tensioning
Referring to the number of broken wires allowed in a wire rope. What is the rule of
thumb for determining replacement? - ANSWER 3/6
Wire rope should be replaced if the wear in the outer strand wires exceeds: - ANSWER
1/3 of original diameter
When inspecting wire rope, interior broken wires and corrosion can be checked by
magnetic particle testing. - ANSWER True
Corrosion of wire rope is usually caused from: - ANSWER Lack of lubrication
Which product is considered a suitable lubricant to use on a wire rope? - ANSWER Light
mineral oil
To prevent seizing wire rope when spooling it onto a drum from the shopping reel, the
operator should always: - ANSWER Allow the reel to rotate freely
What is the rule of thumb formula to find the breaking strength of an IWRC wire rope? -
ANSWER D(squared)x45
Solutions 100% Verified
Two types of wire rope center core designs - ANSWER Fiber core and independent wire
rope core
What is the percentage gain in strength using an IWRC versus a fiber core wire rope? -
ANSWER 7.5
What characteristic increases in a wire rope by using a rope with more strands and
more wires in the strands? - ANSWER Flexibility
Grade 110/120 Improved Plow Steel has the highest tensile strength of any type of wire
rope. - ANSWER False-it has lower tensile strength
A regular lay wire rope has strands and wires in the strands that: - ANSWER Are laid in
opposite directions
Due to its tendency to unwind, which wire rope should NOT be used on a single part
hoisting lines? - ANSWER Lang lay
A 6x19 wire rope classification could have as many as 16 to 26 wires per strand. -
ANSWER True
Which wire rope classification is listed as non-rotating? - ANSWER 35 strand
When a non-rotating rope is used in a wedge socket, care must be taken to prevent: -
ANSWER Core slippage
, A rotation resistant wire rope may have a smaller working load limit than an equal size
6x37 IWRC because: - ANSWER -IWRC has a higher breaking strength
-rotating resistant requires higher working load limit
When hoisting personnel on a crane equipped with rotating resistant wire rope, what is
the design factor required by most safety standards? - ANSWER 10:1
Newer designs of wire rope with shapes wires and triangular strands are an attempt to
prevent rope damage from: - ANSWER -multiple drum layers
-cross winding
-improper tensioning
Referring to the number of broken wires allowed in a wire rope. What is the rule of
thumb for determining replacement? - ANSWER 3/6
Wire rope should be replaced if the wear in the outer strand wires exceeds: - ANSWER
1/3 of original diameter
When inspecting wire rope, interior broken wires and corrosion can be checked by
magnetic particle testing. - ANSWER True
Corrosion of wire rope is usually caused from: - ANSWER Lack of lubrication
Which product is considered a suitable lubricant to use on a wire rope? - ANSWER Light
mineral oil
To prevent seizing wire rope when spooling it onto a drum from the shopping reel, the
operator should always: - ANSWER Allow the reel to rotate freely
What is the rule of thumb formula to find the breaking strength of an IWRC wire rope? -
ANSWER D(squared)x45
