Agglomeration Strength Testing Methods
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Questions and Answers

Which property of product granules can be characterized by unconfined yield stress and angle of friction by shear cell tests?

  • True density
  • Agglomerate porosity
  • Bulk density (correct)
  • Apparent density

What method is commonly used to assess the tensile strength of agglomerates based on the text?

  • Compression strength assessment
  • Redispersion tests
  • Interparticle contact test
  • Crushing strength measurement (correct)

What does the Griffith crack theory state regarding brittle failure of a granule?

  • Only elastic materials are affected by crack growth
  • Cracks propagate when potential energy reduction equals surface energy increase (correct)
  • Failure depends solely on tensile strength of bonds
  • Crack propagation is independent of flaw distribution

In the context of agglomerates, what effect do high compaction pressures have according to the text?

<p>Enhance short-range forces (B)</p> Signup and view all the answers

What factor is largely associated with the health hazard imposed by asbestos?

<p>Shape and size of the particles (D)</p> Signup and view all the answers

Which type of process can cause agglomeration of particles even in a static fluid due to Brownian movement?

<p>Perikinetic Process (D)</p> Signup and view all the answers

What gives medicated pellets or pills the required strength during their formation?

<p>Binder in the particulate matter (D)</p> Signup and view all the answers

In disperse systems, what type of forces operate independently and decrease exponentially with distance across the ionic double-layer?

<p>Double-layer repulsive forces (C)</p> Signup and view all the answers

What is the main purpose of spraying liquid on the surface of a bed in order to aid agglomeration?

<p>Increase the bulk density of the agglomerates (D)</p> Signup and view all the answers

How are larger, denser, and stronger agglomerates typically produced in a pan agglomerator compared to a drum agglomerator?

<p>By achieving a preferentially longer retention time for fines (A)</p> Signup and view all the answers

What is the effect of high compaction forces on materials in terms of producing sheets, briquettes, or tablets?

<p>Improves the strength of the products (C)</p> Signup and view all the answers

How does heating materials aid in agglomeration processes?

<p>Increases the true density of the agglomerates (D)</p> Signup and view all the answers

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