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Process Control and Instrumentation

Process Control and Instrumentation
Temperature measurement by optical pyrometer is done above __________ point, which is 1063°C.

Antimony
Gold
Silver
Nickel

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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

Conductors
Dielectrics
Semi conductors
Insulators

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Process Control and Instrumentation
A first order system with a time constant of 1 min is subjected to frequency response analysis. At an input frequency of 1 radian/min, the phase shift is

-180°
-90°
-45°
45°

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Process Control and Instrumentation
Specific conductance is defined as the reciprocal of resistance in ohms of 1c.c. of liquid at a specified temperature. Its value for distilled water is about __________ micro mho/cm³.

50
10
1
100

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Process Control and Instrumentation
Liquid discharge from a tank or reservoir can not be measured by

Orificemeters
Notches
Weirs
Mouthpieces

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Process Control and Instrumentation
The __________ of the fluid contained in the temperature sensing element (i.e., bulb) of filled system thermometers changes with change in temperature.

Pressure
Volume
All of these
Viscosity

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