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Quiz 1
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Q.1
How are systems intended for the digestions are filled and emptied?
a) Manually
b) By evaporation
c) By pumps and pipes
d) By channels and pits
Q.2
Cow manure is rich in __________
a) Hydrogen
b) Phosphorus
c) Nitrogen
d) Potassium
Q.3
How many weeks does complete digestion of cow manure takes about?
a) 1
b) 2
c) 4
d) 8
Q.4
How many weeks does a batch digester need to produce biogas?
a) 1 week
b) 2 – 4 week
c) 12 week
d) 4 – 8 week
Q.5
Which of the following matter has a much higher carbon – nitrogen ratio?
a) Vegetable matter
b) Cow dung
c) Plant waste
d) Organic waste from industry
Q.6
Which of the following waste produces more gases comparatively?
a) Vegetable matter
b) Cow dung
c) Plant waste
d) Organic waste from industry
Q.7
How much thick layer of insulation is done inside of digester?
a) 10 cm
b) 15 – 25 mm
c) 8 mm
d) 50 – 100 cm
Q.8
What happens if the organic matter is not stirred while in process of digestion?
a) It will evaporate
b) It solidifies
c) It will form hard scum on layer
d) It gets struck to digester walls
Q.9
How is biogas from an anaerobic digester collected?
a) In a compressor
b) In the pipelines
c) In inverted drum
d) In a storage tank
Q.10
Which type of valve is used to prevent air being drawn into the digester?
a) Non return valve
b) Poppet vale
c) Return valve
d) Check valve
Q.11
Which types of plants are filled and then emptied completely after fixed retention time?
a) Batch plants
b) Continuous plants
c) Floating gas holder plants
d) Flexible bag biogas plant
Q.12
What is the major disadvantage of batch plants?
a) Their output is not steady
b) Comes to frequent breakdown
c) They are not efficient
d) They are very costly
Q.13
Which among the following best suitable treatment of waste products?
a) Aerobic fermentation
b) Anaerobic fermentation
c) Autolysis
d) Thermal reaction
Q.14
What does PSD stand for?
a) Post source decay
b) Particle size distribution
c) Polystyrene deuterated
d) Post synaptic density
Q.15
Which is the third stage of anaerobic digestion?
a) Acetogenesis
b) Methanogenesis
c) Acidogenesis
d) Hydrolysis
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