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/3 π/6 π/12 5π/12 π/3 π/6 π/12 ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following thermocouples has the widest temperature measurement range? Copper-constantan Iron-constantan Platinum-platinum/rhodium Chromel-alumel Copper-constantan Iron-constantan Platinum-platinum/rhodium Chromel-alumel ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Alphatron measures pressure __________ microns. > 3 < 1 < 3 < 0.1 > 3 < 1 < 3 < 0.1 ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Strain gage uses an electrical conductor wire, which when elastically stretched increases in length and reduces in diameter. Both these dimensional changes result in __________ in the electrical resistance of the wire. No change Decrease Exponential decrease Increase No change Decrease Exponential decrease Increase ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Thermocouple is suitable for measuring Very high temperatures only Both high and low temperatures Liquid temperatures only Very low temperatures only Very high temperatures only Both high and low temperatures Liquid temperatures only Very low temperatures only ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation What is the dynamic error in a critically damped second order instrument for a ramp input (AT)? 1.5 AT √AT 2 AT 0.5 AT 1.5 AT √AT 2 AT 0.5 AT ANSWER DOWNLOAD EXAMIANS APP
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