A. O2, NO and NO2 exhibit paramagnetic properties as a result of unpaired electrons
B. CO2 is the strongest paramagnetic gas
C. Paramagnetic susceptibility of gases decreases with temperature
D. Paramagnetic susceptibility of gases permits the measurement of their concentration
Answer: Option B
This Question Belongs to Chemical Engineering >> Process Control And Instrumentation
Phase lag of the frequency response of a second order system to a sinusoidal forcing function
A. Is 30°
B. Is 90° at the most
C. Approaches 180° asymptotically
D. Is 120°
Which of the following is not classified as a thermo electric pyrometer?
A. Resistance thermometer
B. Thermocouple
C. Optical pyrometer (disappearing filament type)
D. Radiation pyrometer
A. Chromel-alumel
B. Iron-constantan
C. Platinum-platinum/rhodium
D. None of these
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