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Process Control and Instrumentation

Process Control and Instrumentation
Platinum resistance thermometer can be used upto antimony point which is __________ °C, and is the temperature of equilibrium between solid antimony & liquid antimony at normal atmospheric pressure.

961.93
630.74
1064.43
1261.93

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Process Control and Instrumentation
Response of a linear control system for a change in set point is called

Servo problem
Regulator problem
Transient response
Frequency response

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Process Control and Instrumentation
Which of the following thermocouples is capable of measuring a temperature of -50°C?

Iron-constantan
Platinum - platinum + rhodium
Chromel - alumel
Copper - constantan

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Process Control and Instrumentation
The closed loop pole of a stable second order system could be

Both real and negative
One real positive and the other real negative
Both real and positive
Complex conjugate with positive real parts

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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

Insulators
Dielectrics
Semi conductors
Conductors

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Process Control and Instrumentation
Hot wire anemometer is used for the measurement of

Thermal conductivity of gases
Flow rates of granular solids
Flow rates of fluids
Very high temperature

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