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Process Control and Instrumentation

Process Control and Instrumentation
Which of the following flow-metering instru-ments is an areameter?

Pitot tube
Venturimeter
Rotameter
Hot wire anemometer

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Process Control and Instrumentation
Which of the following thermocouples is incapable of measuring sub-zero (i.e., < 0°C) temperature?

Chromel-alumel
Copper-constantan
Iron-constantan
Platinum-platinum + rhodium

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Process Control and Instrumentation
Mercury thermometer is commonly used for low temperature measruement. The freezing point and boiling point of mercury are respectively __________ °C.

- 39 and 350
- 79 and 395
- 10 and 425
- 51 and 439

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Process Control and Instrumentation
pH meter has

One cell
Three cells
No cell
Two cells

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Process Control and Instrumentation
Response of a linear control system for a change in set point is called

Transient response
Frequency response
Servo problem
Regulator problem

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Process Control and Instrumentation
Which of the following is the dynamic characteristics of an instrument?

Fidelity
Sensitivity
Dead zone
Reproducibility

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