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Process Control and Instrumentation

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

Radiation pyrometer
None of these Here
Optical pyrometer
Specially designed thermocouple

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Process Control and Instrumentation
The time constant of a first order process with resistance R and capacitance C is

R + C
1/RC
RC
R - C

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Process Control and Instrumentation
Thermal conductivity cell is the primary element of a/an __________ analyser.

Sulphur dioxide
Carbon monoxide
Carbon dioxide
Oxygen

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Process Control and Instrumentation
Thermocouple in a thermal well behaves as a true

Second order system (overdamped)
Second order system (underdamped)
Multiple first order system
First order system

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Process Control and Instrumentation
Bode diagram is a plot of

Log (AR) vs. log (f) and (Φ) vs. log (f)
Log (AR) vs. f and log Φ vs.f
None of these
AR vs. log (f) and Φ vs. log (f)

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Process Control and Instrumentation
Gain margin is equal to the

Gain in P-I controller
Amplitude ratio
Reciprocal of amplitude ratio
Gain in P controller

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