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PLTW CIM Final Review. questions and answers already passed 2024
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PLTW CIM Final Review. questions and answers already passed 2024
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PLTW CIM Final ReviewJig - correct answer ✔A device that holds and locates a piece of work and
guides the tools that operate upon it. Example: table, anything that is used to
guide material.
Fixture - correct answer ✔A device designed and built for holding a particular
piece of work for machining operations without the ability to guide tools
Postprocessor - correct answer ✔A post-processor is in essence software
and or a sequence of instructions to deal with a nuetral format generated by a
CAM system and translates that nuetral language to one that makes your
CNC control happy.
Flexible Manufacturing system - correct answer ✔Adapts efficiently to
changing need, allows the system to react in case of changes whether
predicted or unpredicted.
Lean manufacturing - correct answer ✔Systematic elimination of waste.
Entire system must participate to produce effectively
six sigma - correct answer ✔indicates measure of quality for near perfection.
Produces fewer than 3.4 defects per million opportunities. Identifies and
corrects causes of defects. Utilizes the five "whys" to uncover root cause.
kaizen - correct answer ✔japanese for improvement. Based on continuous
improvement by everyone.
, mass production - correct answer ✔the production of large amounts of
standardized products whereas handmade production makes a smaller
number of items
work envelope - correct answer ✔range of motion of a robot or machine
rapid prototyping - correct answer ✔prototype made directly from a computer
model. several technologies: sterolithography, 3D printing, selective laser
sintering, fused deposition modeling.
work cells - correct answer ✔an arrangement of resources in a
manufacturing enviroment to improve the quality speed and cost of the
process
tolerance - correct answer ✔an allowable amount of variation of a specified
quantity, especially in the dimensions of a machine or part
repeatability - correct answer ✔indicates how close together repeated
measurements of the same quantity are to each other.
accuracy - correct answer ✔indicates how close measurements are to the
actual quantity being measured.
closed loop - correct answer ✔a type of control system that automatically
changes the output based on the difference between the feedback signal to
the input signal. Requires feedback from sensor input to control outputs.
open loop - correct answer ✔a type of control system that uses only an input
signal to actuate an output. there is no automatic feedback to adjust the
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