Manufacturing Processes & Production Flashcards
7 cards from real CPT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Manufacturing Processes & Production flashcards as text
In statistical process control (SPC), what does an 'out-of-control' signal on a control chart indicate?
Answer: A non-random (special cause) variation is present in the process
An out-of-control signal indicates that special cause variation — an assignable, non-random source — is affecting the process, requiring investigation and corrective action.
What is the primary function of cutting fluid (coolant) in machining operations?
Answer: To reduce heat at the cutting zone and flush away chips
Cutting fluid reduces friction and heat generation at the cutting interface, extends tool life, flushes chips from the cutting zone, and improves surface finish.
Which production layout arranges machines in a sequence that matches the flow of a specific product family, minimizing material handling?
Answer: Cellular (product family) layout
Cellular manufacturing groups dissimilar machines into a cell dedicated to producing a family of similar parts, reducing material travel, WIP, and lead time.
In powder metallurgy (PM), what is the sequence of main manufacturing steps?
Answer: Mix → compact → sinter → optional finishing
Powder metallurgy follows: mix powders → compact in a die under pressure → sinter (heat below melting point to bond particles) → optional secondary operations such as coining or infiltration.
What is 'mean time between failures' (MTBF) used to measure?
Answer: The average operating time between successive failures of a repairable system
MTBF measures the average elapsed time between one failure and the next for a repairable system, serving as a key reliability metric for maintenance planning.
In resistance spot welding, what property of the interface material primarily generates the heat needed to form the weld nugget?
Answer: Electrical resistance
Resistance spot welding generates heat through electrical resistance (I²R heating) at the interface between workpieces when current is passed through them under electrode pressure.
Which lean tool uses a visual card or signal to authorize and trigger the movement or production of materials between process steps?
Answer: Kanban
Kanban uses visual signals (cards, bins, or electronic triggers) to authorize replenishment or production of a specific quantity of material only when consumed downstream.