Process Control and Instrumentation For a feed back control system to be stable, the Roots of the characteristic equation should be real Bode plots of the corresponding open loop transfer function should monotoni-cally decrease Poles of the closed loop transfer function should lie in the left half of the complex plane Poles of the closed loop transfer function should lie in the right half of the complex plane Roots of the characteristic equation should be real Bode plots of the corresponding open loop transfer function should monotoni-cally decrease Poles of the closed loop transfer function should lie in the left half of the complex plane Poles of the closed loop transfer function should lie in the right half of the complex plane ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation The transfer function of a pure dead time system with dead time τd is Eτds E-τds Τds + 1 1/(τds + 1) Eτds E-τds Τds + 1 1/(τds + 1) ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Pick out the one which is a first order instrument. Mercury in glass thermometer (without any covering or air gap) Bare metallic thermometer Bare vapor pressure thermometer All of these Mercury in glass thermometer (without any covering or air gap) Bare metallic thermometer Bare vapor pressure thermometer All of these ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following thermocouples can measure the maximum temperature? Tungsten-molybdenum Platinum-rhodium Iron-constantan Chromel-alumel Tungsten-molybdenum Platinum-rhodium Iron-constantan Chromel-alumel ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation For increased speed of response of an expansion pressure spring thermometer, the thermometer bulb should have a High thermal conductivity All of these Large area but small mass Small specific heat High thermal conductivity All of these Large area but small mass Small specific heat ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Phase lag of the sinusoidal response of a first order system is 120° 90° 30° 180° 120° 90° 30° 180° ANSWER DOWNLOAD EXAMIANS APP
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