Engine : Electricity - 969/1386
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| A salinity indicator system such as that used to measure the salt content of potable water systems and boiler feed and condensate systems uses what technology? |
| A) a salinity cell that senses the pH of water |
| B) a salinity cell that senses the brine density of water |
| C) a salinity cell that senses the electrical conductivity of water |
| D) a salinity cell that senses the optical refraction of water |
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