NWP104A Sample and test water sources and quality
Testing types quiz
There are 10 statements below and each one gives you three possible answers
to choose from. Choose the answer that you think is most suitable.
When you have completed the quiz you will find the answers on the last page.
1.
Water quality tests done in the field would include:
a) D1, D2 and D3.
b) MR, QS and PL.
c) pH, EC and DO.
2. pH testings is a measure of the:
a) phosphate and heavy metal concentration in water.
b) acidity and alkalinity of water.
c) potassium hydroxide levels of water.
3. Electrical conductivity is usually used to measure the amount of
dissolved salts in a water body because:
a) electrical currents cause salts to sink to the bottom of the test tube.
b) salty water conducts electricity better than fresh water.
c) salts form crystals in the presence of electricity.
4. The temperature of water dictates how much:
a) oxygen can be dissolved in it.
b) hydrogen is dissolved in it.
c) phosphate is dissolved in it.
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NWP104A Sample and test water sources and quality
5. Turbidity is measured in:
a) NTUs.
b) NTIs.
c) NPs.
6. To test for Dissolved Oxygen (DO) you would use a:
a) meter and probe.
b) electrical conductivity meter.
c) pH probe and meter.
7. Six tests that would be conducted in a laboratory would be:
a) Glass thermometer, digital probe, electrical conductivity meter,
turbidimeter, Secchi disk.
b) DO, pH, NTUs, EC, temperature, turbidity.
c) pesticide, nutrients, metals, hydrocarbons, bacteriological, biological.
8. Water turbidity is measured using:
a) a digital probe.
b) a Secchi disk.
c) NTUs.
9. The process of setting up equipment so that readings are accurate
is called:
a) correlation.
b) collection.
c) calibration.
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NWP104A Sample and test water sources and quality
10. When you carry out water quality testing you must follow
organisational procedures. These can include:
a) sampling guidelines, testing guidelines, occupational health and
safety procedures.
b) calibration, validation, collection.
c) field, grab, laboratory.
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NWP104A Sample and test water sources and quality
Answers
1
Answer c is correct. pH, EC (Electrical conductivity) and DO (Dissolved
oxygen) are three types of field tests. Temperature and turbidity tests
are also done in the field.
2
Answer b is correct. pH is a measure of the acidity and alkalinity of a
solution –in this case, water.
3
Answer b is correct. Salty water does conduct electricity better than
fresh water. By measuring the strength of the current it is possible to
calculate the amount of dissolved salts in the water sample.
4
Answer a is correct. The temperature of water dictates how much
oxygen is dissolved in it. Warmer water holds less oxygen in it, and this
can lead to fish death because they have less oxygen to breathe.
5
Answer a is correct. Turbidity is the amount of suspended and dissolved
matter and can give water a cloudy appearance. Turbidity is measured
in an international unit of measurement called NTUs.
6
Answer a is correct. DO is measured using a meter and probe.
7
Answer c is correct. Contamination of the water sample with pesticide,
nutrients, metals, hydrocarbon, bacteria and biological agents would be
tested for in a laboratory.
8
Answer b is correct. Water turbidity is measured with a turbidimeter or
Secchi disk.
9
Answer c is correct. Equipment must be calibrated so that readings are
accurate.
10 Answer a is correct. Some standard organisational procedures would
include sampling and testing guidelines and occupational health and
safety procedures.
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