What Is the Main Difference Between High Density PolyEtyhlene (HDPE)and

question 91

Multiple Choice

What is the main difference between High Density PolyEtyhlene (HDPE) and Low Density PolyEthylene(LDPE) ?

• A)HDPE has very long chains packed close together; LDPE has long chains that are branched and do not pack together well.
• B)One is made from high density ethylene,the other from low density ethylene.
• C)HDPE has very long chains packed close together; LDPE has short chains that do not pack together well.
• D)HDPE is more useful than LDPE.
• E)LDPE is more useful than HDPE.

Understand the grading system for precision grades and its impact on tolerance specification.

Apply knowledge of tolerance position letters and their implications for internal and external dimensions.

Extract and use data from reference charts to determine precise fit and tolerance details for given dimensions.

Grasp the concept of hole basis and shaft basis fit systems and the method to specify them.

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Definitions:

Terminate

To bring an end to something; in business, it can refer to the conclusion of a contract, the end of an employment relationship, or the cessation of operations.

Scientific Process

A systematic method of investigation involving observation, experiment, and the development of theories or principles.

Hypothesis

A proposed explanation made on the basis of limited evidence as a starting point for further investigation.

Data

Information collected for reference, analysis, or to inform decisions, often structured for easy access and study.