Water Quality Analyzers Part A Flashcards

1
Q

What are environmental water guidelines for?

A

1) Effluent limits
2) Protection of water uses
3) Science based recommendations

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2
Q

What are the water uses that get protected?

A

1) Aquatic life
2) Agriculture
3) Recreation and aesthetics
4) Raw water for drinking
Industrial water supply

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3
Q

What is a guideline?

A

A numerical concentration or a narrative statement which is recommended to protect a specific use of water

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4
Q

What material do liquid analyzers use as their major component?

A

Water

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5
Q

What are the 2 liquid analyzer applications?

A

1) Water quality monitoring and control
2) Industrial product applications

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6
Q

pH analyzers measure the water’s __________.

A

acidity or alkalinity (how basic it is)

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7
Q

What are the 3 applications that require liquid analyzers to measure water quality?

A

1) Wastewater
2) Drinking water
3) Boiler feedwater

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8
Q

What are the 4 basic water quality parameters that is typically monitored?

A

1) pH
2) Turbidity
3) Dissolved Oxygen
4) Specific ions like Chlorine

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9
Q

Before performing maintenance on a liquid analyzer the operator must read ____________ and ____________.

A

Manufacturer’s manual and MSDS

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10
Q

Before removing a sensor what 2 things must be done?

A

1) The process must depressurize
2) The process drains below insertion hole of the sensor

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11
Q

What is used when it is impossible the depressurize and reduce the level of the process?

A

Retractable sensor that will enter the process line with a ball valve.

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12
Q

An electrochemical cell converts _________ energy into __________ energy.

A

Chemical, electrical

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13
Q

What are the 4 parts of a pH analyzer?

A

1) A reference electrode half-cell
2) A pH sensitive measurement electrode half-cell
3) Very high input impedance amplifier
4) A transmitter that converts cell voltage into a pH signal

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14
Q

The polarity of the glass measurement electrode voltage is negative in acidic liquids. (T/F)

A

False; the polarity of the glass measurement electrode is negative if the solution is basic

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15
Q

What does the Nernst equation calculate in electrochemical cells?

A

Voltage

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16
Q

What are you solving for when you divide the change in electrochemical cell’s voltage by the pH change?

A

Slope of the mV/pH unit

17
Q

Where is the isopotential point for a pH electrochemical cell?

A

pH at which all the temperature lines intersect