Process Control and Instrumentation Emf developed by a thermocouple while measuring a temperature of 800°C is about 31 mV. The type of thermocouple used is Platinum-platinum+rhodium Iron-constantan Chromel-alumel None of these Platinum-platinum+rhodium Iron-constantan Chromel-alumel None of these ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Thermal wells are used in the temperature measurement to Reduce measuring lag Increase the fidelity Increase the sensitivity Guard against corrosive and oxidising action on thermocouple materials Reduce measuring lag Increase the fidelity Increase the sensitivity Guard against corrosive and oxidising action on thermocouple materials ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Normal mercury thermometer can be used to measure a temperature of about 300°C. However, its maximum temperature measurement range can be increased upto about 500°C by Filling nitrogen under pressure in the stem Increasing the diameter of the tube Accounting for the tube expansion Using steel tube in place of glass tube Filling nitrogen under pressure in the stem Increasing the diameter of the tube Accounting for the tube expansion Using steel tube in place of glass tube ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation According to Bode stability criterian, a system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at frequency for which phase lag is 45° 90° 180° 0° 45° 90° 180° 0° ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Non-metallic diaphragm used as pressure sensor in instruments is generally made of Teflon Thick paper Synthetic rubber Bakelite Teflon Thick paper Synthetic rubber Bakelite ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Working principle of radiation pyrometer is based on the Wien's law Seebeck effect Stafan-Boltzman law Kirchoffs law Wien's law Seebeck effect Stafan-Boltzman law Kirchoffs law ANSWER DOWNLOAD EXAMIANS APP
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