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Process Control and Instrumentation

The time taken for a radioactive element to reduce to 50% of its original weight is _____________ years, if its half life period is 12 years?

Process Control and Instrumentation /
The time taken for a radioactive element to reduce to 50% of its original weight is _____________ years, if its half life period is 12 years?

A. 24
B. 18
C. 6
D. 36

The time taken for a radioactive element to reduce to 50% of its original weight is _____________ years, if its half life period is 12 years? Read More »

Process Control and Instrumentation

Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic ?

Process Control and Instrumentation /
Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic ?

A. CO2
B. O2
C. NO
D. NO2

Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic ? Read More »

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________________?

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________________?

A. 5π/12
B. π/6
C. π/12
D. π/3

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________________? Read More »

Process Control and Instrumentation