Process Control and Instrumentation __________ type of element is normally not used in the bimetallic thermometers. Single helix Flat spiral Multiple helix Bourdon tube Single helix Flat spiral Multiple helix Bourdon tube ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Working principle of mercury in glass thermometer is based on the __________ of mercury with increase in temperature. Increase of thermal conductivity Differential linear expansion Increase of pressure Volumetric expansion Increase of thermal conductivity Differential linear expansion Increase of pressure Volumetric expansion 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 Underdamped response Undamped response Overdamped response Unstable response Underdamped response Undamped response Overdamped response Unstable response ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following is not a composition measuring instrument? Hot wire anemometer Polarograph Mass spectrometer Thermal conductivity cell Hot wire anemometer Polarograph Mass spectrometer Thermal conductivity cell 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 Invar Nickel Brass Chromel Invar Nickel Brass ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Dome temperature of blast furnace stove is most accurately measured by a Iron-constantan thermocouple Radiation pyrometer Platinum resistance thermometer Platinum-platinum/rhodium ther-mocuple Iron-constantan thermocouple Radiation pyrometer Platinum resistance thermometer Platinum-platinum/rhodium ther-mocuple ANSWER DOWNLOAD EXAMIANS APP
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