A viscosity index reflects _____. (Multiple Choice)

A viscosity index reflects _____.
 
  a. the lubricating ability of a fluid
  b. the speed at which a liquid flows
  c. how thick a fluid is at high temperatures
  d. the changes in fluid viscosity at different temperatures

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[Ques. 2] The lowest temperature at which a fluid will flow freely is its _____.
 
  a. viscosity
  b. pour point
  c. emulsion rate
  d. viscosity index

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[Ques. 3] A simple hydraulic cylinder consists of a housing, a piston, and a _____.
 
  a. piston rod
  b. bolt
  c. seal
  d. gasket

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[Ques. 4] The movement of force, in pounds, over a distance is _____.
 
  a. work
  b. energy
  c. pressure
  d. fluid power

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[Ques. 5] Corrosion is caused by _____.
 
  a. acids created by the combination of air and liquid
  b. viscosity that is too high
  c. pressure that is too high
  d. a low pour point