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
Process Control and Instrumentation
The frequency at which maximum amplitude ratio is attained is called the ______________ frequency?
The frequency at which maximum amplitude ratio is attained is called the ______________ frequency?
A. Corner
B. Resonant
C. Cross-over
D. Natural
Thermocouple is suitable for measuring_________________?
Thermocouple is suitable for measuring_________________?
A. Liquid temperatures only
B. Very high temperatures only
C. Very low temperatures only
D. Both high and low temperatures
For the time domain function f(t) = t, the Laplace transform of ∫0 t f(t) dt is given by___________________?
For the time domain function f(t) = t, the Laplace transform of ∫0 t f(t) dt is given by___________________?
A. 1/2 S3
B. 2/S3
C. 1/S3
D. 2/S2
Phase margin is equal to_______________?
Phase margin is equal to_______________?
A. 180° – phase lag
B. Phase lag – 180°
C. Phase lag + 180°
D. Phase lag + 90°
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 ?
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
A non-linear chemical system is exemplified by a/an_________________?
A non-linear chemical system is exemplified by a/an_________________?
A. Isothermal CSTR
B. Mixer
C. Non-isothermal CSTR
D. None of these
All the thermocouples used for temperature measurement use dissimilar metal ________________?
All the thermocouples used for temperature measurement use dissimilar metal ________________?
A. Strips
B. Bars
C. Wires
D. Beads
Dead zone is the__________________?
Dead zone is the__________________?
A. Same as time constant
B. Same as transportation lag
C. Maximum change in the variable that does not change the reading of the instrument
D. None of these
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________________?
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