Draw the schematic diagram of a biogas plant.

Name the device shown in the given diagram. What is being prepared in it?

Draw a neat diagram of a biogas plant and label
(a) Inlet of slurry
(b) Digester and
(c) Gas outlet.

Consider the following statements and select the correct option which correctly identifies true (T) and false (F).
$\left(\mathrm{i}\right)$ Biogas is a combustible gas obtained by the anaerobic decomposition.
$\left(\mathrm{ii}\right)$ Producer gas is a mixer of flammable gas only.
$\left(\mathrm{iii}\right)$ In a nuclear reactor, the moderator is Uranium-$234$.
$\left(\mathrm{iv}\right)$ Wind speed should be lower than $15 \mathrm{km} {\mathrm{h}}^{-1}$ to maintain the required speed of the turbine.