MCQ Question Bio-Energy Sources

 

1.     The term biomass most often refers to ___________
a) Inorganic matter
b) Organic matter
c) Chemicals
d) Ammonium compounds
Answer: b
Explanation: The term biomass is most often refers to the organic matters such as timber and crops grown specially to be burnt to generate heat and power.

2.     Dead organisms also come under the biomass.
a) True
b) False
Answer: a
Explanation: Dead organisms also come under the biomass. Some living organisms, recently dead organisms and by-products of plants and animals are also comes under biomass.

3.     Biomass is useful to produce __________
a) Chemicals
b) Fibres
c) Biochemicals
d) Transportation fuels
Answer: d
Explanation: Biomass is useful to produce the transportation fuels. It is also useful to produce the renewable electricity and thermal energy.

4.     Which one of the following is an example of starch crops biomass feed stocks?
a) Sugar cane
b) Wheat straw
c) Corn stover
d) Orchard prunings
Answer: a
Explanation: The grains and starch crops biomass are sugar cane, iron, wheat, sugar beats and instrial sweet and potatoes.

5.     Which of the following forestry materials can be used as biomass?
a) Logging residues
b) Tallow
c) Fish oil
d) Manure
Answer: a
Explanation: The forestry materials that can be used as the biomass is logging residues. The tallow, fish oil and manure comes under the animal-by-products that can be used as biomass.

6.     Which of the following is not used as biomass?
a) Hybrid poplar
b) Willow algae
c) Iron nails
d) Trap grease
Answer: c
Explanation: The hybrid poplar and willow algae are the energy crops that can be used as the biomass. The trap greases comes under the urban wastes that can be used as biomass. Iron nails are not the biomass.

7.     The aerobic digestion of sewage is used to produce __________
a) Biomass
b) Bio fuels
c) Synthetic fuels
d) Metal articles
Answer: b
Explanation: The aerobic digestion of sewage is used to produces bio fuels. The fuels that can be derived from the biomass are called as the bio fuels.

8.     Bio ethanol is denatured alcohol that is also called as __________
a) Ethylene
b) Methylated spirit
c) Ethylene glycol
d) Methylene
Answer: b
Explanation: Bio ethanol is denatured alcohol. It is also called as methylated spirit. It causes blindness on consumption.

9.     The production of bio ethanol is by fermenting the _________ and starch components.
a) Acid
b) Milk
c) Sugar
d) Alcohol
Answer: c
Explanation: The bio ethanol is produced by fermenting the sugar and starch components of plant products. First it is subjected to the milling and mixed with water and enzymes.

10.   The bio ethanol is subjected to rectification to remove ___________
a) Sugar
b) Enzymes
c) Yeast
d) Impurities

Answer: d
Explanation: After adding the water and enzymes, the sugar syrup and yeast is subjected to fermentation followed by distillation and the rectification to remove impurities.

11. The bio ethanol obtained in the fermentation process has __________ purity.
a) 99%
b) 99.2%
c) 99.4%
d) 99.7%
Answer: d
Explanation: The bio ethanol obtained in the formation process has 99.7% purity. The highest purity is obtained fermentation process.

12.  The by-products that are produced during rectification of bio ethanol is used as_________
a) Pig feed
b) Cow feed
c) Dog feed
d) Sheep feed
Answer: c
Explanation: The by-products that are obtained during rectification of bio ethanol are evaporated, dried and can be used as dog feed.

13.  To make transport fuel the bio ethanol is blended with _________
a) Diesel
b) Petrol
c) Oil
d) Kerosene
Answer: b
Explanation: To make the transport fuel, the bio ethanol is blended with the petrol. It is one of the applications of the bio ethanol.

14.   _________ is called as the bio gas.
a) Bio ethanol
b) Bio methane
c) Bio diesel
d) Bio butanol
Answer: b
Explanation: The bio methane is called as the bio gas. It is used mainly for cooking purposes. It is mostly produced from animal wastes.

15.   The percentage of carbondioxide in the bio methane is ____________
a) 30-40
b) 32-43
c) 35-45
d) 55-60
Answer: b
Explanation: The bio methane is the mixture of the methane, carbondioxide, small amounts of nitrogen. The carbondioxide is nearly of 32-43%.

16.  The bio methane is produced by the __________ of biomass.
a) Aerobic oxidation
b) Anaerobic oxidation
c) Fermentation
d) Rectification
Answer: b
Explanation: The bio methane is produced by the anaerobic oxidation of biomass. The biomass can be compressed in the same way as natural gas(CNG).

17.   Bio gas is compressed and used as ________
a) Motor fuel
b) Fuels in vehicles
c) Dog feed
d) Cow feed
Answer: a
Explanation: Bio gas is compressed and used as the motor fuel. The bio gas is blended with the petrol to be used as the transportation fuels.

18.  The _______ is used as the agricultural fertilizer.
a) Bio ethanol
b) Bio ethane
c) Bio methanol
d) Digestrate
Answer: d
Explanation: The digestrate is used as the agricultural fertilizers. The bio methane is used by gas turbines to produce electricity and heat.

19.  Bio diesel is produced by the __________ of the vegetable oil.
a) Fermentation
b) Distillation
c) Transesterification
d) Rectification
Answer: c
Explanation: Bio diesel is produced by the transesterification of the vegetable oil. The fermentation is the process of producing alcohol. The process of refining the petroleum is called distillation.

20.    The bio diesel is the long chain of carbon atoms contains _________ group at one end.
a) Alcohol
b) Aldehyde
c) Ketone
d) Ester
Answer: d
Explanation: The bio diesel contains long chain of carbon atoms that having an ester group on one end. Its structure is CH₃—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—COOCH₃.

21. The difference between structure of the bio diesel and the regular diesel is an ester group.
a) True
b) False
Answer: a
Explanation: The only difference between the structure of bio diesel and regular diesel is an ester group. The structure of the bio diesel is CH₃—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—COOCH₃ and the structure of the regular diesel is CH₃—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₂—CH₃.

22.     The first diesel engine run on ___________
a) Bio diesel
b) Regular diesel
c) Vegetable oil
d) Petrol
Answer: c
Explanation: The first diesel engine did not run on diesel fuel but on the vegetable oil. Diesel engines can burn bio diesel fuel with no modifications as it has similar structure to regular diesel.

23.   The vegetable oil __________times larger than the normal diesel molecule.
a) 1
b) 2
c) 3
d) 4
Answer: c
Explanation: The vegetable oil is three times larger than that of the normal diesel molecule. The large size of vegetable oil causes gels in cold weather.

24.  The transesterification is done in presence of methanol, NaOH and__________
a) KOH
b) Ca(OH)₂
c) Mg(OH)₂
d) Na(OH)₂
Answer: a
Explanation: The transesterification is done in presence of methanol, NaOH and KOH. The transesterification is done to prevent the formation of gels in cold weather.

25.    If the traces of water is left in the vegetable oil then ________ is formed.
a) Diesel
b) Bio diesel
c) Petrol
d) Soap
Answer: d
Explanation: If the traces of the water are left in the vegetable oil then the water will be reacted with the vegetable oil and forms the soap.

26.Fuels cell is an electrochemical device that converts the chemical energy into the ___________
a) Electrical energy
b) Mechanical energy
c) Static energy
d) Frictional energy
Answer: b
Explanation: Fuel cell is an electronic device that converts the chemical energy contained in an easily available fuel oxidant system into the mechanical energy.

27.    Fuel cells are characterized by the ____________
a) High efficiency
b) High noise levels
c) Vibrations are present
d) No heat transfer
Answer: a
Explanation: Fuel cells are characterized by high efficiency. It is also characterized by the low noise level, free from vibrations and there is heat transfer.

28.     The hydrogen-oxygen fuel cell consists of the _________ inert porous electrodes.
a) One
b) Two
c) Three
d) Four
Answer: b
Explanation: The hydrogen-oxygen fuel cells consist of the two inert porous electrodes. It is made of graphite impregnated with the finely divided platinum or an alloy of Pb with Ag or Ni.

29.  The hydrogen-oxygen fuel cells have electrolyte solution of 2.5% __________
a) KOH
b) NaOH
c) Na(OH)₂
d) Mg(OH)₂
Answer: a
Explanation: The hydrogen-oxygen fuel cells have electrolyte solution of 2.5% of KOH. Through the anode hydrogen gas is bubbled.

30.   From cathode ___________ gas is bubbled in hydrogen-oxygen cell.
a) Hydrogen
b) Oxygen
c) Nitrogen
d) Chlorine

Answer: b
Explanation: From cathode, the oxygen gas is bubbled and the hydrogen gas is bubbled from the cathode in hydrogen-oxygen cell.