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Process Control and Instrumentation

Process Control and Instrumentation
The thermal emf-temperature relationship of most thermocouples is

Exponential
Linear
Parabolic
Square root

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Process Control and Instrumentation
Thermal well made of __________ gives the fastest speed of response, while measuring temperature by thermocouples.

Inconel
Steel
Nichrome
Vycor (a glass)

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Process Control and Instrumentation
Reference points i.e., ice point and steam point in Reaumer temperature scale are respectively

32° & 460°
0° & 80°
- 273° & 80°
32° & 80°

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Process Control and Instrumentation
Thermistor, which has high temperature co-efficient of resistivity, is used as the sensing element in resistance thermometer. It is a/an

Conductor
Liquid semi-conductor
Insulator
Solid semi-conductor

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Process Control and Instrumentation
A constant volume gas thermometer employing __________ is used to measure sub-zero (i.e., < 0° C) temperature.

Helium
Hydrogen
None of these
Nitrogen

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Process Control and Instrumentation
Temperature measuring instruments are standardised mostly with __________ points of pure substances.

Neither A nor B Here
Boiling
Both A & B Here
Melting

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