The underground well of a biogas plant is called the

A. Septic tank

B. Oxidation well

C. Digestor

D. Lagoon

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. Ceramic compounds as compared to metallic compounds
  2. The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam.
  3. In an amorphous material, atoms defy any definite atomic structure and exist in random pattern just…
  4. Titanium is produced by __________ of Ti Cl4.
  5. The cooling rate required to freeze 1 ton of water at 0°C into ice at 0°C in 24 hours is __________…
  6. The concentration of (H+) ions is 4 x 10-5 in a solution. Then pH of the solution will be (Given log…
  7. Steam condenser tubes are made of admiralty brass, in which percentage of zinc & copper are __________…
  8. When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the
  9. A dense structure of grinding wheel is not used for the
  10. Saturated steam at a pressure of 25 kg/cm2 is throttled to attain 5 kg/cm2. Then the outcoming steam…
  11. Oxyacetylene reducing flame is used while carrying out welding on
  12. A solar cell converts the sunlight directly into __________ energy.
  13. __________ has the highest melting point out of the following.
  14. Cassiterite is an ore of
  15. Heat flow across a hollow sphere of inner radius 'r1' and outer radius 'r2' is directly proportional…
  16. The Al2O3 content of cryolite in Hall- Heroult cell is maintained between __________ percent.
  17. X-rays are
  18. M10 index of coke indicates its
  19. In multipass welds, shot peening is done after each pass to
  20. Diamagnetic materials
  21. For a first order chemical reaction, the concentration of the reactant decreases __________ with time.
  22. Silicon crystal can be converted to p-type semiconductor by doping with
  23. Mho's scale of hardness, which consists of 10 standard minerals is used for the measurement of __________…
  24. In a good rimming steel
  25. Which of the following terminology is used for the temperature at which new grains are formed in a metal?
  26. Glass reacts with
  27. Catalyst used in the 'catalytic converter' employed in automobile exhaust line for complete combustion/oxidation…
  28. Inertial forces are obtained, when the elastic forces are multiplied by __________ number.
  29. Percentage of differential pressure lost in a Venturimeter with a tapering of 15° may be about
  30. The product out from a cupola is called