Process Control and Instrumentation A sinusoidal variation in the input passing through a linear first order system Becomes less oscillatory (frequency decreases) Becomes more oscillatory (frequency increases) Gets amplified (magnitude increases) Gets attenuated (magnitude decreases) Becomes less oscillatory (frequency decreases) Becomes more oscillatory (frequency increases) Gets amplified (magnitude increases) Gets attenuated (magnitude decreases) ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation The time constant of a unity gain, first order plus time delay process is 5 min. If the phase lag at a frequency of 0.2 rad/min is 60°, then the dead time (in minutes) is 5π/12 π/12 π/3 π/6 5π/12 π/12 π/3 π/6 ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature? Chromel-constantan Iron-constantan All of these Platinum-platinum + rhodium Chromel-constantan Iron-constantan All of these Platinum-platinum + rhodium ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation The function of a transducer is to Modify the input signal Amplify the input signal Convert the primary signal into a more useful quantity, usually an electric impulse Codify/decodify the input signal Modify the input signal Amplify the input signal Convert the primary signal into a more useful quantity, usually an electric impulse Codify/decodify the input signal ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation A bimetallic thermometer as compared to industrial mercury in glass thermometer has almost the same Accuracy (± 1% of span) All of these Temperature measuring range (- 40°C to 450°C) Speed of response Accuracy (± 1% of span) All of these Temperature measuring range (- 40°C to 450°C) Speed of response ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following is a desirable characteristic of an instrument? High fidelity High measuring lag Poor reproducibility High drift High fidelity High measuring lag Poor reproducibility High drift ANSWER DOWNLOAD EXAMIANS APP
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