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Process Control and Instrumentation

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

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

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Process Control and Instrumentation
Thermisters which have a very high temperature co-efficient of resistivity belong to the class of solid called

Dielectrics
Semi conductors
Insulators
Conductors

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Process Control and Instrumentation
Relationship between absorption/evolution of heat at the thermocouple junctions and the current flow in the circuit is given by __________ effect.

None of these
Peltier
Thomson
Seebeck

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Process Control and Instrumentation
High temperature of around 2000°C of incandescent gas mantles is measured by a/an

None of these Here
Radiation pyrometer
Specially designed thermocouple
Optical pyrometer

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Process Control and Instrumentation
A mercury thermometer can not be used to measure the temperature below the freezing point of mercury, which is __________ °C.

-38.9
-11.9
-80.9
-60.9

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Process Control and Instrumentation
E.m.f. generated by thermocouples is of the order of

Microvolts
Millivolts
Kilo volts
Volts

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