Millwright Rigging & Lifting Math With
Complete Solutions 100% 2024
The breaking strength of rope is
a. force needed to pull rope
b. force needed to tear rope
c. force needed to break the rope
d. force needed to stretch rope - correct answer c. force needed to break the rope
Traction grade wire rope has a breaking load of __________ tons per square inch
a. 110-190
b. 50-60
c. 45-90
d. 80-90 - correct answer d. 80-90
Special improved plow grade wire rope has a breaking load of _________ tons per square inch
a. 120-130
b. 50-60
c. 45-90
d. 80-90 - correct answer a. 120-130
A core is built into a wire rope to ?
a. hold shape
b. conform to manufacturers specs
c. supports strands and maintain shape
d. stiffen rope - correct answer c. supports strands and maintain shape
Fibre cores are usually made from ________ but can be made from synthetic rope or polypropylene.
,a. sisal
b. silca
c. rubber
d. sodium - correct answer b. sisal
What type of rope is used when rope is subject to sudden heavy loads, crushing or heat?
a. IWTC
b. ICDT
c. IWRT
d. IWRC - correct answer d. IWRC
Independent Wire Rope Cores
or
WRC wire rope cores
Lay refers to the direction in which the rope are twisted together. The term lay length refers to the
___________ along the rope in which a strand makes one revalution
a. size
b. distance
c. direction
d. angle - correct answer b. distance
This consists of a number of wires twisted to the left around a small core to form each of six strands.
These strands are then twisted to the right around the main core to form the final rope
a. Lang lay
b. Left lay
c. Center lay
d. Right lay - correct answer d. Right lay
, This consists of wires twisted to the right and then the strands twisted to the left to produce the rope
a. Lang lay
b. Left lay
c. Center lay
d. Right lay - correct answer b. left lay
This consists of wires or strands twisted in the same direction.
a. Lang lay
b. Left lay
c. Center lay
d. Lang lay - correct answer d. lang lay
-Disadvantages include
both ends need fastened to prevent unraveling
-must not be used in single part lift or with swivels
-cannot be used with slings and does not resist cutting
Is more flexible has more area in contact with drum spools
Wire ropes are classified by 4 factors
number of ropes
number of strands
type of core
the lay - correct answer Wire ropes are classified by 4 factors
number of ropes
number of strands
type of core
Complete Solutions 100% 2024
The breaking strength of rope is
a. force needed to pull rope
b. force needed to tear rope
c. force needed to break the rope
d. force needed to stretch rope - correct answer c. force needed to break the rope
Traction grade wire rope has a breaking load of __________ tons per square inch
a. 110-190
b. 50-60
c. 45-90
d. 80-90 - correct answer d. 80-90
Special improved plow grade wire rope has a breaking load of _________ tons per square inch
a. 120-130
b. 50-60
c. 45-90
d. 80-90 - correct answer a. 120-130
A core is built into a wire rope to ?
a. hold shape
b. conform to manufacturers specs
c. supports strands and maintain shape
d. stiffen rope - correct answer c. supports strands and maintain shape
Fibre cores are usually made from ________ but can be made from synthetic rope or polypropylene.
,a. sisal
b. silca
c. rubber
d. sodium - correct answer b. sisal
What type of rope is used when rope is subject to sudden heavy loads, crushing or heat?
a. IWTC
b. ICDT
c. IWRT
d. IWRC - correct answer d. IWRC
Independent Wire Rope Cores
or
WRC wire rope cores
Lay refers to the direction in which the rope are twisted together. The term lay length refers to the
___________ along the rope in which a strand makes one revalution
a. size
b. distance
c. direction
d. angle - correct answer b. distance
This consists of a number of wires twisted to the left around a small core to form each of six strands.
These strands are then twisted to the right around the main core to form the final rope
a. Lang lay
b. Left lay
c. Center lay
d. Right lay - correct answer d. Right lay
, This consists of wires twisted to the right and then the strands twisted to the left to produce the rope
a. Lang lay
b. Left lay
c. Center lay
d. Right lay - correct answer b. left lay
This consists of wires or strands twisted in the same direction.
a. Lang lay
b. Left lay
c. Center lay
d. Lang lay - correct answer d. lang lay
-Disadvantages include
both ends need fastened to prevent unraveling
-must not be used in single part lift or with swivels
-cannot be used with slings and does not resist cutting
Is more flexible has more area in contact with drum spools
Wire ropes are classified by 4 factors
number of ropes
number of strands
type of core
the lay - correct answer Wire ropes are classified by 4 factors
number of ropes
number of strands
type of core
