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 0° 45° 180° 90° 0° 45° 180° 90° ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following is not suitable for measuring the temperature of a red hot object in the range of 800 - 1600°C? Thermocouples Radiation pyrometer Photoelectric pyrometer Optical pyrometer Thermocouples Radiation pyrometer Photoelectric pyrometer Optical pyrometer ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Thermal wells are used in the temperature measurement to Reduce measuring lag Increase the fidelity Guard against corrosive and oxidising action on thermocouple materials Increase the sensitivity Reduce measuring lag Increase the fidelity Guard against corrosive and oxidising action on thermocouple materials Increase the sensitivity 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 0.5 1/√2 1 0.25 0.5 1/√2 1 ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Out of the following temperature measuring instruments, the measurement accuracy will be minimum for the Optical pyrometer Alcohol filled thermometer Mercury in glass thermometer Iron-constantan thermocouple Optical pyrometer Alcohol filled thermometer Mercury in glass thermometer Iron-constantan thermocouple ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation The amplitude ratio for the sinusoidal response of __________ is < 1. None of these Transportation lag First order system Second order system None of these Transportation lag First order system Second order system ANSWER DOWNLOAD EXAMIANS APP
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