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 180° 0° 45° 90° 180° 0° 45° 90° ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Emf developed by a thermocouple, while measuring a temperature of 600°C is about 5.5 mV. The type of thermocouple used is Iron-constantan Platinum-platinum+rhodium Chromel-alumel Either A, B or C Iron-constantan Platinum-platinum+rhodium Chromel-alumel Either A, B or C ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Cascade control means One feed-back loop On-off control More than one feed-back loop Feed forward control One feed-back loop On-off control More than one feed-back loop Feed forward control ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following is a 'contact' pyrometer? Radiation pyrometer Optical pyrometer Resistance pyrometer Infra red pyrometer Radiation pyrometer Optical pyrometer Resistance pyrometer Infra red pyrometer ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Pick out the one which is a first order instrument. Mercury in glass thermometer (without any covering or air gap) All of these Bare metallic thermometer Bare vapor pressure thermometer Mercury in glass thermometer (without any covering or air gap) All of these Bare metallic thermometer Bare vapor pressure thermometer ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation The thermal emf-temperature relationship of most thermocouples is Parabolic Square root Exponential Linear Parabolic Square root Exponential Linear ANSWER DOWNLOAD EXAMIANS APP
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