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Process Instrumentation and Control - Interview Questions and Answers

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81. The orsat apparatus is used for measuring:
A. chemical analysis of flue gases
B. moisture in air
C. composition of alloys
D. colour spectrum
E. molecular configuration.
Explanation:
82. The density can be measured using :
A. weight
B. buoyancy
C. hydrostatic head
D. resonant elements
E. all of above.
Explanation:
83. Spectrophotometer is used to :
A. measure surface hardness
B. measure surface characteristics
C. measure chemical composition of al-loys
D. analyse colour spectrum
E. analyse gas composition.
Explanation:
84. Which measurement is a good guide to the quality of the water :
A. conductivity
B. pH
C. dissolved 02 content
D. turbidity
E. all of the above.
Explanation:
85. Electrode potential is concerned with measurement of:
A. density
B. viscosity
C. chemical analysis
D. PH
E. all of above.
Explanation:
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