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Process Control and Instrumentation

Process Control and Instrumentation
A non-linear chemical system is exemplified by a/an

Isothermal CSTR
Mixer
None of these
Non-isothermal CSTR

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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
- 51 and 439
- 10 and 425

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Process Control and Instrumentation
Pirani gauge is used for the measurement of

Liquid level at atmospheric pressure
High vacuum
Very high pressure
Liquid level under pressure

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Process Control and Instrumentation
What is the normal percentage of rhodium in platinum + rhodium element used in the thermocouple?

29
13
0.1
3

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Process Control and Instrumentation
The deflection in diaphragm (which is used as pressure sensor in pneumatic and electronic instruments) is dependent on the metal thickness, its diameter (d) and shape & number of corrugations. Its deflection is proportional to

D²
D³
D
D⁴

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Process Control and Instrumentation
The response of two tanks of same size and resistance in series is

Over damped
Under damped
None of these
Critically damped

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