Process Control and Instrumentation The open loop transfer function of a control system is KR/(1 + TS) . This represents Dead time system A first order time lag A first order system A second order system Dead time system A first order time lag A first order system A second order system ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation In second order underdamped system, Decay ratio = (overshoot)² Overshoot increases for increasing damping co-efficient Large damping co-efficient means smaller damping Decay ratio = overshoot Decay ratio = (overshoot)² Overshoot increases for increasing damping co-efficient Large damping co-efficient means smaller damping Decay ratio = overshoot ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation __________ is undesirable in thermocouples used in industries, Corrosion resistance Linear relation of emf to temperature Non-linear relation of emf to temperature Oxidation resistance Corrosion resistance Linear relation of emf to temperature Non-linear relation of emf to temperature Oxidation resistance ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Time constant is the Time taken by the controlled variable to reach 63.2% of its full change Same as transportation lag Same as dead time Time required by the measured variable to reach 63.2% of its ultimate change Time taken by the controlled variable to reach 63.2% of its full change Same as transportation lag Same as dead time Time required by the measured variable to reach 63.2% of its ultimate change ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following filled system expansion thermometers has the lowest positive temperature measurement capability? Fused metal (Na or K) in steel thermometer Alcohol in glass thermometer Nitrogen in steel thermometer Mercury in glass thermometer Fused metal (Na or K) in steel thermometer Alcohol in glass thermometer Nitrogen in steel thermometer Mercury in glass thermometer ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following thermocouples has the widest temperature measurement range? Platinum-platinum/rhodium Iron-constantan Chromel-alumel Copper-constantan Platinum-platinum/rhodium Iron-constantan Chromel-alumel Copper-constantan ANSWER DOWNLOAD EXAMIANS APP
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