Process Control and Instrumentation Which of the following temperature measuring instruments need not touch the object whose temperature is being measured? Radiation/infrared pyrometer Thermo electric pyrometer Mercury in glass thermometer Filled system thermometer Radiation/infrared pyrometer Thermo electric pyrometer Mercury in glass thermometer Filled system thermometer ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Routh test Criterion is not applicable to systems with polynomial characteristic equation Cannot be used to test the stability of a control system containing transportation lag Criterion provides information about the actual location of roots Can not determine as to how many roots of the characteristics equation have positive real roots Criterion is not applicable to systems with polynomial characteristic equation Cannot be used to test the stability of a control system containing transportation lag Criterion provides information about the actual location of roots Can not determine as to how many roots of the characteristics equation have positive real roots ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation __________ stability method uses open loop transfer function. Ruth Mikhalov Nyquist None of these Ruth Mikhalov Nyquist None of these ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation The time constant of a unity gain, first order plus time delay process is 5 min. If the phase lag at a frequency of 0.2 rad/min is 60°, then the dead time (in minutes) is π/3 π/6 5π/12 π/12 π/3 π/6 5π/12 π/12 ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Accurate temperature measurement performance of a radiation pyrometer can not be affected, if the Object is transparent Enhancement or attentuation of redia-tion occurs in the sighting path Object has varying emissivity Object and surrounding are at almost the same temperature Object is transparent Enhancement or attentuation of redia-tion occurs in the sighting path Object has varying emissivity Object and surrounding are at almost the same temperature 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
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