NPTEL Product Design and Development Week 4 Assignment Answers 2024

1. Both DFM and DFA seek to reduce material, overhead, and labor cost.

True
False

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2. ____________ minimizes complexity of manufacturing operations.

Design for Manufacturing
Design for Assembly
Both a and b
None of the above

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3. Which of the following statement(s) is (are) in context of Design for Manufacturing and Assembly?
I. The number of components in a product should be minimum.
II. Integrate parts, aim to multifunctional components.

I only
II only
Both I and II
None of the above

Answer :-

4. According to the design guidelines for insertion and fastening, which of the following statement(s) is (are) correct?
I. Design so that there is little or no resistance to insertion and provide chamfers to guide insertion of two mating parts.
II. Generous clearance should be provided, but care must be taken to avoid clearances that will result in a tendency for parts to jam or hang up during insertion.

I only
II only
Both I and II
None of the above

Answer :-

5. ______________ assembly is for small parts with easy reach of worker.

Bench
Multi-station
Modular
Flexible

Answer :-

6. Which of the following statement(s) is (are) correct in context of design considerations for casting?

Appropriate runner geometry selection for the system is unimportant.
Locate and design the gates to allow uniform feeding of the mold cavity with molten metal.
Mold features such as sprue, runner, gate, and risers can be located anywhere in the system.
All of the above

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7. Which of the following statement(s) is (are) correct in context of design considerations for machining?

Avoid partial hole (if large portion of hole is outside the part), it causes wandering of drill bit.
Features should be assessable to cutting tool in preferred machining orientation.
Rounded keyways are suited to cutting tools and easy to develop.
All of the above

Answer :-

8. What are the advantages of Rapid Prototyping?

Superior quality surface is obtained.
Separate material can be used for component and support.
No need to design jigs and fixtures.
All of the above

Answer :-

9. Which of the following statement(s) is (are) correct in context of Laminated Object Manufacturing?

Thin slices of material (usually adhesively coated paper, plastic or metal) are successively glued together to form a 3D shape.
Thermoplastic or metal filament is extruded through the small orifice of heated nozzle.
3D parts are produced by fusing a thin slice of the powdered material onto the layers below it.
All of the above