Process Control and Instrumentation The temperature of tempering oil baths maintained at 400°C during heat treatment of steel is measured by a/an __________ thermocouple. None of these Platinum-platinum/rhodium Chromel-alumel Iron-constantan None of these Platinum-platinum/rhodium Chromel-alumel Iron-constantan ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation The time constant of a first order process with resistance R and capacitance C is RC 1/RC R + C R - C RC 1/RC R + C R - C ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following instruments is not used for measuring sub-zero (<0°) temperatures? Radiation pyrometer Vapor pressure thermometer Platinum resistance thermometer Mercury in glass thermometer Radiation pyrometer Vapor pressure thermometer Platinum resistance thermometer Mercury in glass thermometer ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation What is the Laplace transform of sin t ? S/(s² + 1) 1/(s² - 1) 1/(s² + 1) S/(s² - 1) S/(s² + 1) 1/(s² - 1) 1/(s² + 1) S/(s² - 1) ANSWER DOWNLOAD EXAMIANS APP
Process Control and Instrumentation Which of the following is not a second order instrument? Mercury in glass thermometer with covering None of these Bare mercury in glass thermometer Pressure gauge with one bellow, two tubes and a tank Mercury in glass thermometer with covering None of these Bare mercury in glass thermometer Pressure gauge with one bellow, two tubes and a tank 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/12 π/3 π/6 5π/12 π/12 π/3 π/6 5π/12 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS