Process Control and Instrumentation Which of the following thermocouples can measure the maximum temperature? Chromel-alumel Tungsten-molybdenum Iron-constantan Platinum-rhodium Chromel-alumel Tungsten-molybdenum Iron-constantan Platinum-rhodium ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation The temperature range for which copper resistance thermometer can be used is __________ °C 500 to 900 350 to 750 -200 to 150 0 to 150 500 to 900 350 to 750 -200 to 150 0 to 150 ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Degree to which an instrument indicates the changes in measured variable without dynamic error is called its Static characteristics Speed of response Reproducibility Fidielity Static characteristics Speed of response Reproducibility Fidielity ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following is a desirable characteristic of an instrument? High fidelity High drift High measuring lag Poor reproducibility High fidelity High drift High measuring lag Poor reproducibility 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 π/3 π/12 π/6 5π/12 π/3 π/12 π/6 5π/12 ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Cascade control means One feed-back loop More than one feed-back loop Feed forward control On-off control One feed-back loop More than one feed-back loop Feed forward control On-off control ANSWER DOWNLOAD EXAMIANS APP
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