Step 1: Understanding RDF.
Refuse-Derived Fuel (RDF) is a fuel produced from various types of municipal solid waste (MSW), primarily after removing non-combustible inorganics like glass, stones, and metals.
Step 2: Checking each option.
(A) False — The calorific value (HHV) of RDF is actually higher than that of unprocessed MSW because inorganics and non-combustibles are removed.
(B) True — RDF can be processed into different forms such as pellets, briquettes, or even powder form to suit industrial applications.
(C) False — The inorganic fraction of MSW is not converted into RDF; it is separated out during processing. Only the combustible fraction is converted.
(D) False — RDF can be co-fired with oil, coal, or other fuels in boilers and cement kilns.
\[
\boxed{\text{Therefore, the correct answer is (B).}}
\]
Two soils of permeabilities \( k_1 \) and \( k_2 \) are placed in a horizontal flow apparatus, as shown in the figure. For Soil 1, \( L_1 = 50 \, {cm} \), and \( k_1 = 0.055 \, {cm/s} \); for Soil 2, \( L_2 = 30 \, {cm} \), and \( k_2 = 0.035 \, {cm/s} \). The cross-sectional area of the horizontal pipe is 100 cm², and the head difference (\( \Delta h \)) is 150 cm. The discharge (in cm³/s) through the soils is ........ (rounded off to 2 decimal places).
The most suitable test for measuring the permeability of clayey soils in the laboratory is ___________.
Consider the beam ACDEB given in the figure. Which of the following statements is/are correct:
The figures, I, II, and III are parts of a sequence. Which one of the following options comes next in the sequence as IV?