Adding chemicals to a solution tank should occur in the following sequence _____.

Adding chemicals to a solution tank should occur in the following sequence _____.
 
  a. any liquids, then any solids
  b. any solids, then any liquids
  c. chemicals first, then water
  d. water first, then chemicals

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[Ques. 2] If blue litmus paper turns red when a water sample is tested, this indicates that the pH of the water is _____.
 
  a. above 7.0
  b. between 10 and 14
  c. neutral
  d. below 7.0

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[Ques. 3] Which of the following is caused by the presence of slime-producing biologic organisms in the water in an
  HVAC system?
 
  a. Increased water flow
  b. Inadequate heat transfer
  c. Excessive bleed-off
  d. Excessive cooling

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[Ques. 4] The greater the concentration of dissolved solids in an HVAC system's water, the greater the potential for
  _____.
 
  a. foaming
  b. temperature fluctuations
  c. corrosion
  d. electrolysis

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[Ques. 5] The speed of a single-phase motor is determined by the number of stator windings and the _____.
 
  a. number of rotor windings
  b. size of the armature
  c. frequency of the applied voltage
  d. volume of current applied