Fill is placed and compacted in multiple layers called _____.

Fill is placed and compacted in multiple layers called _____.
 
  a. strata
  b. flights
  c. panels
  d. lifts

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[Ques. 2] The density testing method that involves sending impulses into the soil is _____.
 
  a. radar testing
  b. nuclear testing
  c. electrical density testing
  d. stroboscopic testing

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[Ques. 3] The single most important variable in soil compaction is the _____.
 
  a. moisture content
  b. type of soil
  c. compacting equipment
  d. compaction method

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[Ques. 4] For compacting soil in trenches, an effective tool is the _____.
 
  a. rubber-tired roller
  b. vibrating-plate compactor
  c. smooth steel-wheeled roller
  d. segmented pad roller

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[Ques. 5] When installing faced insulation in a wall that will have a separate vapor barrier installed, the staples should
  be fastened to the wall frame _____.
 
  a. on the faces of the wall studs, top plate, and sole plate
  b. on the inside surfaces of the wall studs, top plate, and sole plate
  c. only to the top plate and sole plate
  d. only to the faces of the wall studs