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Elevator 245-250 Questions and answers
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Elevator 245-250 Questions and answers
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Elevator 245-250What is meant by suspension regarding elevator equipment? -
CORRECT ANSWER-A means of connecting the cars and
counterweights with the hoisting machines.
What are the means of suspension that are used in the elevator
industry? . - CORRECT ANSWER-Ropes or belts are the most common
materials used for suspension
What materials are used in the construction of governor ropes and car
ropes? - CORRECT ANSWER-Iron, monel, bronze, fiber or steel
What is meant by the term lang lay? - CORRECT ANSWER-When the
wires of the strand form an angle with the axis of the rope
What is meant by rope lay? - CORRECT ANSWER-The direction that
the strands are coiled around the core material
What is the most common finish on ropes? - CORRECT
ANSWER-Bright or uncoated
What are the components of a wire rope? - CORRECT ANSWER-Wires,
that form the strand, Strands that lay around the core, and core material
What materials is used in the construction of belts for suspension? -
CORRECT ANSWER-Stranded aramid fiber, carbon fiber and
non-circular elastomeric coated steel belts NECSBS
What is the core of a rope made from? - CORRECT ANSWER-Either
fiber or wire
When would iron grade steel be most likely be used? - CORRECT
ANSWER-When working on older equipment
How many different types of steel are used in the construction of ropes?
- CORRECT ANSWER-6 different types of steels can be used Traction
Steel (TS); Plow Steel (PS), mild plow steel (MPS)Improved plow steel
, (IPS, Extra Improved Plow Steel (EIPS) Extra Extra Improved Plow Steel
(EEIPS)
What is special about Warrington ropes? - CORRECT ANSWER-The
inside wires of the strands are the same diameter. While the wire that
make up the outer strand edge alternate between the sizes used
What are the benefits of using lang lay ropes? - CORRECT
ANSWER-They have a greater resistance to abrasions and greater
flexibility that regular ropes
What is significant about Seale ropes? - CORRECT ANSWER-The
strand is made up of 1 large wire surrounded by 9 small wires which are
surrounded by 9 large wires
What are disadvantages of using lang lay ropes? - CORRECT
ANSWER-Harder to handle; more likely to untwist, kink easier and
easier to crushing
What is a drawback to using Warrington ropes? - CORRECT
ANSWER-They aren't wearing resistant
What do 6 x 19 regarding ropes mean? - CORRECT ANSWER-The first
number represents the number of strands that make up the rope. The
second number is the number of wires per strand
What is a benefit of using preformed ropes? - CORRECT
ANSWER-Broken wires are less appt to stick out from the surface
What are preformed ropes? - CORRECT ANSWER-Ropes that have the
strands formed to helical shape during manufacturing process to make
the final product.
When should a tiller rope be used? - CORRECT ANSWER-To manually
change the direction in old controllers.
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