A roller chain is considered worn out when it has elongated to _____ percent over its original ...

A roller chain is considered worn out when it has elongated to _____ percent over its original length.
 
  a. 2
  b. 3
  c. 4
  d. 5

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[Ques. 2] The type of belt that works through frictional contact between the sides of the belt and the tapered sheave
  groove is the _____ belt.
 
  a. Vb.
  Sc.
  synchronous
  d. notched

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[Ques. 3] The kind of belt that is used on small sheaves and can handle bending stress well is the _____ belt.
 
  a. A42
  b. FHP
  c. notched
  d. roller

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[Ques. 4] The most common type of belt is the _____ belt.
 
  a. Vb.
  FDA
  c. DIN
  d. ISO

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[Ques. 5] In the standard proportion for chain manufacturing, the chain width is approximately _____ of the chain pitch.
 
  a. 5/16
  b. 5/8
  c. 1/8
  d. 1/2