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
Related Mcqs:
- Suppose that the gain, time constant and dead time of a process with the following transfer function: Gc(s) = 10 exp( – 0.1s)/(0.5s + 1) are known with a possible error of ± 20% of their values. The largest permissible gain Kc of a proportional controller needs to be calculated below taking the values of process gain, time constant and dead time as________________?
A. 8, 0.6, 0.08
B. 12, 0.6, 0.12
C. 8, 0.6, 0.12
D. 12, 0.4, 0.08 - 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 - Concentration of sugar solution can be determined by the__________________?
A. Polarimetry
B. Flame photometry
C. Emission spectroscopy
D. Oscillometry - Bode diagram are generated from output response of the system subjected to which of the following input ?
A. Impulse
B. Step
C. Ramp
D. Sinusoidal - Emf developed by a thermocouple while measuring a temperature of 800°C is about 31 mV. The type of thermocouple used is________________?
A. Chromel-alumel
B. Iron-constantan
C. Platinum-platinum + rhodium
D. None of these - The deflection in diaphragm (which is used as pressure sensor in pneumatic and electronic instruments) is dependent on the metal thickness, its diameter D. and shape & number of corrugations. Its deflection is proportional to_______________?
A. d
B. d2
C. d3
D. d4 - For an input forcing function, X(t) = 2t2, the Laplace transform of this function is________________?
A. 2/s2
B. 4/s2
C. 2/s3
D. 4/s3 - The response of two tanks of same size and resistance in series is __________________?
A. Under damped
B. Critically damped
C. Over damped
D. None of the above - Liquid levels in autoclaves are measured by ________________?
A. Simple float
B. Differential float type manometer
C. Glass gauge
D. None of these - Which of the following is an undesirable dynamic characteristic of an instrument ?
A. Reproducibility
B. Dead zone
C. Time lag
D. Static error
