Pattern terminology in sand moulding: When a pattern is constructed in three parts for complex geometry, the statement ‘‘the bottom part of the pattern assembly is known as a cope’’ is — select the correct evaluation using standard cope–drag–cheek nomenclature.
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AFalse
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BTrue
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CTrue only for inverted moulding boxes
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DContext-dependent for split patterns
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ETrue for shell moulding only
Answer
Correct Answer: False
Explanation
Introduction / Context:
In sand casting, the moulding box (flask) is typically split into an upper half and a lower half; for more complex castings, a third middle section can be added. Understanding the standard names avoids assembly errors and miscommunication on the foundry floor.
Given Data / Assumptions:
- Three-part pattern/mould arrangement.
- Conventional terminology is used throughout foundry practice.
- No inversion or special jigs altering naming conventions.
Concept / Approach:
The cope is the upper portion of the mould or pattern assembly; the drag is the lower portion; when present, the cheek is the middle section inserted between cope and drag. Therefore, calling the bottom part a ‘‘cope’’ is incorrect; the correct name is drag.
Step-by-Step Solution:
1) Recall standard names: cope (top), drag (bottom), cheek (middle).2) Map statement: ‘‘bottom part is cope’’ contradicts the definitions.3) Conclude the statement is false.Verification / Alternative check:
Foundry texts and shop practice consistently use cope/drag/cheek in this manner; gating and risering diagrams likewise label the halves accordingly.
Why Other Options Are Wrong:
- True / conditional variants: conflict with universal nomenclature unless a hypothetical inverted labeling system is adopted (not standard).
Common Pitfalls:
- Confusing flask orientation during handling with the naming convention, which remains fixed.
Final Answer:
False