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Process Control and Instrumentation

Process Control and Instrumentation
Bimetal strips are not used in

Bimetallic thermometers
Relays for opening & closing of electrical circuits
Thermocouples
Thermostats

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Process Control and Instrumentation
The term analogous to voltage in a single tank system is the

Flow rate
Level of liquid
Heat content of the system
Liquid volume in the tank

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Process Control and Instrumentation
A typical example of a physical system with under damped characteristic is a

Thermocouple kept immersed in a liquid filled thermowell
CSTR with first order reaction
Spring loaded diaphragm valve
U-tube manometer

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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.

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

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Process Control and Instrumentation
Platinum resistance thermometer is the international standard for temperature measurement between

Both A and B
Triple point of hydrogen and freezing point of antimony
Neither A nor B
13.81°K to 903.9°K

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Process Control and Instrumentation
Pick out the one which is a first order instrument.

Bare metallic thermometer
Mercury in glass thermometer (without any covering or air gap)
All of these
Bare vapor pressure thermometer

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