Q.1
Which of the following transducers must be used for dissolved oxygen analyser?
  • a) Potentiometric
  • b) Polarographic
  • c) Ion-selective electrode
  • d) Optical transducer
Q.2
How does solubility of oxygen in water change with respect to temperature?
  • a) It decreases with increase in temperature
  • b) It increases with increase in temperature
  • c) It decreases with decrease in temperature
  • d) It does not depend on temperature
Q.3
The water to be analysed flows into the condenser through which of the following components?
  • a) Filter
  • b) Semi-permeable membrane
  • c) Throttling device
  • d) Platinum filament
Q.4
Which of the following is the function of the throttling device?
  • a) Filtering
  • b) Maintains pH of a water
  • c) Purifies water
  • d) Maintains constant flow rate
Q.5
Which of the following section plays a major role in maintaining the accuracy of the dissolved oxygen analyser?
  • a) Analysing section
  • b) Inlet section
  • c) Transmitting section
  • d) Condensing section
Q.6
Which of the following bridges are used in dissolved oxygen analyser?
  • a) Kelvin’s bridge
  • b) Wheatstone bridge
  • c) Schering’s bridge
  • d) Anderson’s bridge
Q.7
In dissolved oxygen analyser, the electrometer consists of which of the following solutions?
  • a) Calcium hydroxide solution
  • b) Magnesium hydroxide solution
  • c) Potassium hydroxide solution
  • d) Calcium oxide solution
Q.8
The dissolved oxygen analyser is based on which of the following meters?
  • a) Amperometer
  • b) Katharometer
  • c) pH meter
  • d) Voltmeter
Q.9
Oxygen content can be controlled by adding which of the following materials with water?
  • a) Acidic solution
  • b) Basic solution
  • c) Iodine
  • d) Hydrazine
Q.10
In dissolved oxygen analyser, normally more than one condenser is used.
  • a) True
  • b) False
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