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Process Control and Instrumentation

Process Control and Instrumentation
Maximum differential pressure in liquid manometer is __________ psi.

40
50
30
20

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Process Control and Instrumentation
The temperature range for which copper resistance thermometer can be used is __________ °C

500 to 900
0 to 150
-200 to 150
350 to 750

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Process Control and Instrumentation
Photoelectric pyrometers are suitable in the temperature range of __________ °C.

800-2500
800-1600
400-1600
400-1000

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Process Control and Instrumentation
__________ type of element is normally not used in the bimetallic thermometers.

Multiple helix
Flat spiral
Bourdon tube
Single helix

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Process Control and Instrumentation
Emf developed by a thermocouple while measuring a temperature of 800°C is about 31 mV. The type of thermocouple used is

Platinum-platinum+rhodium
None of these
Chromel-alumel
Iron-constantan

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Process Control and Instrumentation
Thermal wells are used in the temperature measurement to

Increase the sensitivity
Reduce measuring lag
Increase the fidelity
Guard against corrosive and oxidising action on thermocouple materials

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