Ab mat (ps)

• What is the definition of impact in size reduction?

  A sudden force occurring when one object collides with another
• What does attrition refer to in size reduction?

  Frictional force applied to the material due to the opposing motion of two hard surfaces
• How is shear defined in the context of size reduction?

  A force applied when the material is compressed between the edges of two hard surfaces moving tangentially
• What is compression in size reduction?

  Force applied by the faces of hard surfaces moving towards each other
• What is the process of particle size analysis?

  • Separating a mixture of particles according to their size
  • Utilizes one or more sieves
• What is aperture size in the context of sieving?

  Dimension defining an opening in a sieve
• What does blinding refer to in sieving?

  Obstruction of the apertures of a sieving medium of materials being sieved
• What is a charge in sieve analysis?

  Test sample for sieve analysis
• What is the role of a dispersion agent in particle size analysis?

  Non-toxic chemicals that help break up agglomerates
• What is a nest of test sieves?

  Set of sieves assembled together with a lid and a receiver (pan)
• What are the uses of sieves in particle size analysis?

  • Separate different sizes of powder
  • Determine average particle size diameter
  • Analyze size distribution
• What is a test sieve?

  Sieve intended for particle size analysis and conforms with the standard specification
• What is the oversize in sieve analysis?

  Portion of the charge that did not pass through the apertures of a stated sieve
• What is the undersize in sieve analysis?

  Portion of the charge that has passed through the apertures of a stated sieve
• What is median size in particle size distribution?

  Particle diameter at 50% probability of a size distribution curve; equivalent to geometric mean diameter
• What is the end-point in sieving?

  The point in time after which further sieving fails to pass an amount sufficient to change the result significantly
• What is the purpose of a sample datasheet in particle size analysis?

  • To record data from particle size analysis
  • To provide a reference for analysis results
• What is the formula for fineness modulus?

  Fineness modulus = total size of particles / number of particles
• What is the fineness modulus if the total size of particles is $370.2$ and the number of particles is $100$?


  $Fineness modulus =$$\frac{370.2}{100} =$$3.70$
• What are class sizes in particle size analysis?

  • Categories of particle sizes
  • Used for classification and analysis
• What organization developed the ASABE Standards?

  The American Society of Agricultural and Biological Engineers
• What is the title of the standard approved in August 2023?

  Method of Determining and Expressing Fineness of Feed Materials by Sieving
• What is the primary focus of ASABE Standards?

  Standardization needs within agricultural, food, and biological systems
• Are ASABE Standards mandatory for industry use?

  No, their use is entirely voluntary
• What designation is given to standards approved before July 2005?

  ASAE
• What does the designation "ANSI" signify for a standard?

  It indicates that the standard is an American National Standard
• What is required for a standard to be adopted as an American National Standard?

  Verification by ANSI that due process and consensus requirements have been met
• What does "substantial agreement" mean in the context of consensus?

  It means much more than a simple majority
• What caution is given regarding ASABE and ANSI standards?

  They may be revised or withdrawn at any time
• What is the purpose of this Standard as stated in section 1.1?

  To define a test procedure to determine the fineness of feed ingredients
• What types of particles does this Standard apply to?

  Particles that are primarily spherical or cubical
• Which ISO standards is this Standard compatible with?

  ISO 565, ISO 2395, ISO 2591-1, ISO 3310-1, and ISO 9276-1
• What is the definition of "aperture size"?

  Dimension defining an opening
• What does "blinding" refer to in sieving?

  Obstruction of the apertures of a sieving medium by particles
• What is a "charge" in the context of sieving?

  A test sample placed on a test sieve
• What is a "cumulative oversize distribution curve"?

  A curve plotting total percentages by mass retained on sieves against aperture sizes
• What is the purpose of a "dispersion agent"?

  To help break up agglomerates
• What is the "end-point" in the sieving process?

  The point after which further sieving does not significantly change the result
• What is the function of a "frame" in sieving?

  To support the sieving medium and limit the spread of material
• What is the "median size" in particle size analysis?

  Particle diameter at 50% probability of a size distribution curve