Product Design and Development Week 4 NPTEL Assignment Answers 2025

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✅ Subject: Product and Brand Management
📅 Week: 4
🎯 Session: NPTEL 2025 July-October
🔗 Course Link: Click Here
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NPTEL Product Design and Development Week 4 Assignment Answers 2025

1. As per design guidelines for Injection Molding process, the minimum draft along the vertical faces must be kept as __________ degree.

• 0.3
• 0.1
• 0.75
• 0.5

Answer : See Answers

2. As per design guidelines for Machining, if partial hole is unavoidable then ensure that at least____ of hole area should be within the material;

• 50%
• 75%
• 25%
• 40%

Answer :

3. As per design guidelines for Injection Molding process, the recommended range of wall thickness for polystyrene resin is in range _____inches.

• 0.035-0.150
• 0.185-0.450
• 0.500-0.750
• 1.000-1.250

Answer :

4. What should be the range of fillet radius in a product design that is to be manufactured by casting process?

• 1 – 5 mm
• 10 – 100 mm
• 5 – 50 mm
• 3 – 25 mm

Answer :

5. The ratio of total length of a part to its minimum diameter during the turning operation must be less than or equal to _____________ .

• 6
• 5
• 8
• 10

Answer :

6. Metal padding (chill) is used during casting to improve the directional solidification and in order to promote the rate of cooling in thicker sections.

• True
• False

Answer : See Answers

7. The presence of uniform cross sections along the part design must be ensured during the casting majorly to avoid;

• Blowholes
• Hot spot and shrinkages
• Cold shut
• Flash

Answer :

8. Design for Manufacturing (DFM) and Design for Assembly (DFA) are concerned with the reduction of the overall part production cost and reduction of product assembly cost, respectively

• True
• False

Answer :

9. The manual assembly process is mainly categorized into;

• Insertion and fastening
• Handling
• Both (a) & (b)
• None

Answer :

10. Which of the following is (are) the basic steps in Rapid prototyping Process?

• Create a CAD model of design and Convert it into STLformat.
• Slice the STL file into thin cross-sectional layers and construct the model layer by layer.
• Clean and finish the model.
• All of these

Answer :  See Answers