Signal normally used to study non-ideal flow by stimulus response technique is _______________ input?

Related Mcqs:

1. The response curve for a step input signal from a reactor is called C-curve. The variance of C-curve in a ‘tanks in series model’ comprising of ‘m’ tanks is equal to ___________________?

   A. m
   B. 1/m
   C. √m
   D. m2

2. ______________ is the response curve for a step input signal from a reactor ?

   A. S-curve
   B. C-curve
   C. I-curve
   D. None of these

3. The exit age distribution of a fluid leaving a vessel (denoted by E) is used to study the extent of non-ideal flow in the vessel. The value of ∫∞ 0 E.dt is____________________?

   A. 0
   B. 1
   C. ∞
   D. √2π

4. A pollutant P degrades according to first order kinetics. An aqueous stream containing P at 2 kmole/m3 and volumetric flow rate 1m3 /h requires a mixed flow reactor of volume V to bring down the pollutant level to 0.5 kmole/m3. The inlet concentration of the pollutant is now doubled and the volumetric flow rate is tripled. If the pollutant level is to be brought down to the same level of 0.5 k.mole/m3, the volume of the mixed flow reactor should be increased by a factor of_______________?

   A. 7
   B. 6
   C. 3
   D. 7/3

5. The single parameter model proposed for describing non-ideal flow is the ____________ model?

   A. Tank in series
   B. Dispersion
   C. Both A. & B.
   D. Neither A. nor B.

6. ‘N’ plug flow reactors in series with a total volume ‘V’ gives the same conversion as a single plug flow reactor of volume ‘V’ for _______________ order reactions?

   A. First
   B. Second
   C. Third
   D. Any

7. The ‘E’ curve for a non-ideal reactor defines the fraction of fluid having age between t and t + dt _____________________?

   A. At the inlet
   B. At the outlet
   C. In the reactor
   D. Averaged over the inlet and outlet

8. Which of the following is a characteristic of an ideal plug flow reactor ?

   A. Axial dispersion
   B. Flat velocity profile
   C. Uniform mixing
   D. None of these

9. An isothermal irreversible reaction is being carried out in an ideal tubular flow reactor. The conversion in this case will ______________ with decrease in space time?

   A. Increase
   B. Increase exponentially
   C. Decrease
   D. Remain unchanged

10. In an ideal tubular-flow reactor_________________?

    A. There is no mixing in longitudinal direction
    B. Mixing takes place in radial direction
    C. There is a uniform velocity across the radius
    D. All A., B. and C.