Process Control and Instrumentation Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature? Iron-constantan Platinum-platinum + rhodium All of these Chromel-constantan Iron-constantan Platinum-platinum + rhodium All of these Chromel-constantan ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation What is the Laplace transform of sin t ? S/(s² + 1) S/(s² - 1) 1/(s² + 1) 1/(s² - 1) S/(s² + 1) S/(s² - 1) 1/(s² + 1) 1/(s² - 1) ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Time constant is the Same as transportation lag Same as dead time Time taken by the controlled variable to reach 63.2% of its full change Time required by the measured variable to reach 63.2% of its ultimate change Same as transportation lag Same as dead time Time taken by the controlled variable to reach 63.2% of its full change Time required by the measured variable to reach 63.2% of its ultimate change ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Platinum resistance thermometer can be used upto antimony point which is __________ °C, and is the temperature of equilibrium between solid antimony & liquid antimony at normal atmospheric pressure. 961.93 1261.93 630.74 1064.43 961.93 1261.93 630.74 1064.43 ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Thermal wells are used in the temperature measurement to Reduce measuring lag Increase the sensitivity Increase the fidelity Guard against corrosive and oxidising action on thermocouple materials Reduce measuring lag Increase the sensitivity Increase the fidelity Guard against corrosive and oxidising action on thermocouple materials ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following can not measure a temperature of 1600°C ? Platinum resistance thermometer Thermocouple Photo-electric pyrometer Radiation pyrometer Platinum resistance thermometer Thermocouple Photo-electric pyrometer Radiation pyrometer ANSWER DOWNLOAD EXAMIANS APP
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