Process Control and Instrumentation Which of the following controllers has the least maximum deviation? P-I-D controller P-controller P-I controller P-D controller P-I-D controller P-controller P-I controller P-D controller ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Operating range of a temperature measuring instrument is 800 to 1600°C. It could be a/an __________ pyrometer. Radiation Optical None of these Photoelectric Radiation Optical None of these Photoelectric ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Working principle of bimetallic thermometers is difference in linear co-efficient of thermal expansion of two strips of different metals welded together. Which of the following has the maximum thermal co-efficient of linear expansion? Chromel Nickel Brass Invar Chromel Nickel Brass Invar ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following thermocouples has the least temperature measurement range? Iron-constantan Chromel-alumel Platinum-platinum/rhodium Copper-constantan Iron-constantan Chromel-alumel Platinum-platinum/rhodium Copper-constantan ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation In a closed loop system, the process to be controlled is an integrating process with transfer function l/2s. The controller proposed to be used in an integral controller with transfer function 1/T₁s. When a step change in set point is applied to such a closed loop system, the controlled variable will exhibit Unstable response Underdamped response Overdamped response Undamped response Unstable response Underdamped response Overdamped response Undamped response 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 5π/12 π/6 π/3 π/12 5π/12 π/6 ANSWER DOWNLOAD EXAMIANS APP
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