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 5π/12 π/3 π/12 π/6 5π/12 π/3 π/12 π/6 ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Magnetic flowmeters are generally not used for the velocity/flow measurement of hydrocarbons due to their Low thermal conductivity Low flash point Low electrical conductivity High viscosity index Low thermal conductivity Low flash point Low electrical conductivity High viscosity index ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following can not measure a temperature of 1600°C ? Thermocouple Radiation pyrometer Platinum resistance thermometer Photo-electric pyrometer Thermocouple Radiation pyrometer Platinum resistance thermometer Photo-electric pyrometer ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Dead zone in an instrument must be less than __________ percent of the scale. 1.5 4 8 0.2 1.5 4 8 0.2 ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation E.m.f. generated by thermocouples is of the order of Volts Microvolts Millivolts Kilo volts Volts Microvolts Millivolts Kilo volts ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which is the most suitable instrument for measuring pressure below 3 microns? Bourdon guage Mcleoid gauge Ionisation gauge Alphatron Bourdon guage Mcleoid gauge Ionisation gauge Alphatron ANSWER DOWNLOAD EXAMIANS APP
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