Tag: biogas

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Questions Related to biogas

Multiple choice physics sources of energy biomass and biogas biogas conventional sources of energy

The output of a given windmill

  1. increases with an increase in wind velocity.

  2. decreases with an increase in wind velocity.

  3. is independent of wind velocity.

  4. cannot be determined
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Windmills convert the kinetic energy of wind into mechanical or electrical energy. Since kinetic energy is proportional to the square of velocity, the output increases as wind velocity increases.

Multiple choice physics sources of energy biomass and biogas biogas conventional sources of energy

Biogas is a mixture of

  1. $CO + H _2 + CH _4$
  2. $CO _2 + CH _4 + H _2 + H _2 S$
  3. $CO + H _2$
  4. $CO _2 + N _2$
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Biogas is primarily produced through the anaerobic digestion of organic matter. Its main components are methane (CH4) and carbon dioxide (CO2), with smaller amounts of hydrogen (H2) and hydrogen sulfide (H2S).

Multiple choice physics sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy production of electricity from solar energy biogas environmental use of microorganism microbes in waste treatment and biogas

In a wind mill the electric energy is converted into mechanical energy.         

  1. True

  2. False

  3. Ambiguous

  4. Data insufficient
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Answer is B.
Windmills, like waterwheels, were among the original prime movers that replaced animal muscle as a source of power. They were used for centuries in various parts of the world, converting the energy of the wind into mechanical energy for grinding grain, pumping water, and draining lowland areas.
Kinetic energy of the wind is transformed into mechanical energy of the turning windmill. This can be used to turn a generator to generate electricity. The original energy to cause the wind to blow came from the sun. Uneven heating of the earth's surface causes wind.
Hence, the statement is false.

Multiple choice physics sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy production of electricity from solar energy biogas environmental use of microorganism microbes in waste treatment and biogas

65% by volume is hydrogen gas in the biogas. 

  1. True

  2. False

  3. Ambiguous

  4. Data insufficient
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Answer is B.

Biogas is characterized based on its chemical composition and the physical characteristics which result from it. It is primarily a mixture of methane (${ CH } _{ 4 }$) and inert carbonic gas (${ CO } _{ 2 }$). However the name 'biogas' gathers a large variety of gases resulting from specific treatment processes, starting from various organic waste - industries, animal or domestic origin waste, etc . 
Hence, the statement is false.

Multiple choice physics sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy production of electricity from solar energy biogas environmental use of microorganism microbes in waste treatment and biogas

The gas obtained by the fermentation of biomass is :

  1. LPG

  2. CNG

  3. hydrogen

  4. biogas
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Fuel-grade ethanol is one energy source that has great potential for being generated from biomass. The gas obtained by the fermentation of biomass is called biogas.

Multiple choice physics sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy production of electricity from solar energy biogas environmental use of microorganism microbes in waste treatment and biogas

Gobar gas is a:

  1. solid fuel

  2. liquid fuel

  3. primary fuel

  4. secondary fuel
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Biogas is a type of secondary energy because biomass (primary energy) is used to produce biogas by anaerobic digestion into more efficient and higher value fuel.Biogas is also called gobargas as made by waste remains of plants and animals.

Multiple choice physics sources of energy renewable and non-renewable resources renewable and non-renewable sources of energy production of electricity from solar energy biogas environmental use of microorganism microbes in waste treatment and biogas

Which of the following is released from biomass?

  1. Cow-dung

  2. Methane

  3. Oxygen

  4. Helium
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Major gases released from biomass are methane ($CH _4$), carbon dioxide ($CO _2$), hydrogen ($H _2$) and hydrogen sulphide ($H _2S$).

Multiple choice zoology bioenergy biogas environmental use of microorganism microbes in waste treatment and biogas

The residue left after methane production from cattle dung is:

  1. burnt

  2. burned in land fills

  3. used as manure

  4. used In, civil construction
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The residue left after methane production from cattle dung is used as manure because it supply some organic materials and minerals to the soil.
So, the correct answer is 'used as manure'
Multiple choice zoology microbes in human welfare biogas environmental use of microorganism microbes in waste treatment and biogas

What would happen if oxygen availability to activated sludge flocs is reduced ?

  1. It will slow down the rate of degradation of organic matter.

  2. The center of flocs will become anoxic, which would cause death of bacteria and eventually breakage of flocs.

  3. Flea would Increase in size as anaerobic bacteria would grow around flocs.

  4. Protozoa would grow in large numbers.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Oxygen is very important for the microorganism to break down and degrade the organic matter which is present in the sewage or the activated sludge. If the oxygen availability of the activated sludge floc is reduced then the degradation rate will slow down.

So, the correct option is 'it will slow down the rate of degradation of organic matter'