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The terms “Concentrated effluent” and “Diluted effluent” are used in internal feedback systems.

Correct Answer: False
In internal feedback systems, effluent is removed from the vessel in two streams: 1) Filtered stream 2) Unfiltered stream Filtered stream serves the purpose of feedback, whereas, Unfiltered stream is utilised for product harvesting. In external feedback systems, Effluent from fermenter is fed through a separator. Two effluent streams are: 1) Concentrated stream 2) Diluted stream Wherein, Concentrated stream serves as feedback and Diluted is used for product harvesting.

Consider the following statements with respect to the feedback of the control systems. i. Feedback can improve stability or be harmful to stability if it is not properly applied. ii. Feedback can always improve stability iii. In many situations the feedback can reduce the effect of noise and disturbance on system performance. iv. In general the sensitivity of the system gain of a feedback system of a parameter variation depends on where the parameter is located.

Consider the following statements with respect to the feedback of the control systems: 1. Feedback can improve stability or be harmful to stability if it is not properly applied. 2. Feedback can always improve stability 3. In many situations the feedback can reduce the effect of noise and disturbance on system performance. 4. In general the sensitivity of the system gain of a feedback system of a parameter variation depends on where the parameter is located.

In a BOD test, 1.0 ml of raw sewage was diluted to 100 ml and the dissolved oxygen concentration of diluted sample at the beginning was 6 ppm and it was 4 ppm at the end of 5 day incubation at 20°C. The BOD of raw sewage will be

3.0 ml of raw sewage is diluted to 300 ml. The D.O. concentration of the diluted sample at the beginning of the test was 8 mg/l. After 5 day-incubation at 20°C, the D.O. concentration was 5 mg/l. The BOD of raw sewerage is

Consider the circuit shown below. Consider A: Current-shunt feedback B: Current-series feedback C: Voltage-shunt feedback D: Voltage-series feedback Which of the above are present?

How many liters of a 90% of concentrated acid needs to be mixed with a 75% Solution of concentrated acid to get a 30 liter Solution of 78% concentrated acid?

Which of these gases is released upon treating zinc with diluted and then concentrated nitric acid?

Which is the type of communication used by small groups?
1. Diffusion
2. Circular flow with feedback
3. Chain flow with feedback
4. Centralised flow with feedback
Select the correct answer:

Which of the following pairs are correctly matched?
1. Test Checking ⇔ Random checking
2. Internal Check ⇔ A system of automatic checking
3. Internal Control ⇔ Includes internal check and internal audit
4. Investigation ⇔ General examination of all accounting records
Select the correct answer:

If the feedback voltage and the output voltage are given as 10v and 4v. Find the gain of the feedback circuit in voltage-series feedback amplifier?