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Process Control and Instrumentation

Process Control and Instrumentation
Continuous measurement of moisture in paper is done by

Sling psychrometer
Weighing
High resistance Wheatstone's bridge circuit
Hair-hygrometer

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

Venturimeter
Pitot tube
Rotameter
Hot wire anemometer

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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.

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

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Process Control and Instrumentation
A bolometer is

Neither A nor B Here
Both A & B Here
An element which senses optical input and delivers thermal output
Used for the measurement of thermal radiation

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

Frequency response
Regulator problem
Servo problem
Transient response

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Process Control and Instrumentation
Which of the following does not figure in the list of seven substances selected for international temperature scale?

Antimony and silver (F.P)
Oxygen and sulphur (B.P)
Zinc (B.P) and mercury (F.P)
Ice (F.P) and steam (B.P)

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