Process Control and Instrumentation Measurement of sub-zero Celcius temperature in industry is done most commonly by Resistance thermometers Bi-metallic thermometers Gas thermometers Thermocouples Resistance thermometers Bi-metallic thermometers Gas thermometers Thermocouples ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Select the correct statement from the following. The amplitude ratio of a pure time delay system increases with frequency The amplitude ratio of a pure capacity process is inversely proportional to frequency The frequency response of a pure capacity process is unbounded The phase lag of a pure time delay system decreases with increasing frequency The amplitude ratio of a pure time delay system increases with frequency The amplitude ratio of a pure capacity process is inversely proportional to frequency The frequency response of a pure capacity process is unbounded The phase lag of a pure time delay system decreases with increasing frequency ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Thermocouple in a thermal well behaves as a true Multiple first order system Second order system (overdamped) Second order system (underdamped) First order system Multiple first order system Second order system (overdamped) Second order system (underdamped) First order system ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following relates the absorption & evolution of heat at the junctions of a thermocouple to the current flow in the circuit? Peltier effect Seebeck effect Joule heating effect Thomson effect Peltier effect Seebeck effect Joule heating effect Thomson effect 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 Which of the following thermocouples is the most suitable for measuring a temperature of about 1600°C in an oxidizing atmosphere? Iron-constantan Chromel-alumel Copper-constantan Platinum-platinum + rhodium Iron-constantan Chromel-alumel Copper-constantan Platinum-platinum + rhodium ANSWER DOWNLOAD EXAMIANS APP
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