Process Control and Instrumentation Thermal wells are used in the temperature measurement to Reduce measuring lag Increase the sensitivity Guard against corrosive and oxidising action on thermocouple materials Increase the fidelity Reduce measuring lag Increase the sensitivity Guard against corrosive and oxidising action on thermocouple materials Increase the fidelity ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation A bolometer is Both A & B Here Neither A nor B Here Used for the measurement of thermal radiation An element which senses optical input and delivers thermal output Both A & B Here Neither A nor B Here Used for the measurement of thermal radiation An element which senses optical input and delivers thermal output ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following thermocouples can measure the maximum temperature? Tungsten-molybdenum Iron-constantan Chromel-alumel Platinum-rhodium Tungsten-molybdenum Iron-constantan Chromel-alumel Platinum-rhodium ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation A first order system with unity gain and time constant τ is subjected to a sinusoidal input of frequency w = 1/τ. The amplitude ratio for this system is 0.25 1/√2 0.5 1 0.25 1/√2 0.5 1 ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following is a 'contact' pyrometer? Optical pyrometer Radiation pyrometer Resistance pyrometer Infra red pyrometer Optical pyrometer Radiation pyrometer Resistance pyrometer Infra red pyrometer ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Reference points i.e., ice point and steam point in Reaumer temperature scale are respectively 32° & 460° 0° & 80° - 273° & 80° 32° & 80° 32° & 460° 0° & 80° - 273° & 80° 32° & 80° ANSWER DOWNLOAD EXAMIANS APP
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