3D Product Prototyping and Testing 3

Question 1

What is 'ASTM D638' and why is it referenced in product design material selection?

Accepted Answer

The standard test method for tensile properties of plastics, used to compare material strength data on datasheets

Answer

ASTM D638 defines the procedure for measuring tensile strength, elongation, and modulus of plastic materials — ensuring datasheet values are comparable across suppliers.

Question 2

What is 'thermal cycling testing' used to evaluate in product design validation?

Accepted Answer

How a product withstands repeated temperature changes, testing for material fatigue, seal failure, and joint cracking

Answer

Thermal cycling exposes products to repeated alternating hot and cold temperatures to accelerate fatigue, delamination, and seal failures caused by differential thermal expansion.

Question 3

What is 'golden sample' or 'golden master' in manufacturing and quality control?

Accepted Answer

An approved reference product sample against which all production units are compared for visual and dimensional quality

Answer

A golden sample is a physically approved, boundary-limit product that manufacturing and quality teams use as a visual and tactile standard for accepting or rejecting production output.

Question 4

What is 'salt spray testing' (ASTM B117) used for in product design validation?

Accepted Answer

Evaluating the corrosion resistance of metal surfaces and coatings by exposure to a saline fog environment

Answer

Salt spray testing exposes parts to a continuous saline mist in a controlled chamber to accelerate corrosion, evaluating how long surface treatments protect the base material.

Question 5

What is 'design validation' versus 'design verification' in a product development quality system?

Accepted Answer

Verification confirms the design meets specifications; validation confirms the product meets user needs in actual use

Answer

Verification tests that design outputs meet design inputs (specs/requirements); validation confirms through user testing that the final product performs its intended use for end users.

3D Product Practice Test

3D Product Practice Test

3D Product Prototyping and Testing 3