Waste Management Mid - I, September - 2014

1.Volume reduction of effluent is one of the following treatment
  • Secondary
  • Primary
  • Tertiary
  • Preliminary
Answer: D
2.Self cleaning velocity is
  • Velocity of water at flushing
  • Velocity at which no accumulation remains
  • Velocity at which no accumulation remains in the drains
  • Velocity of water in a pressure filter
Answer: C
3.Presence of nitrogen in a waste water sample is due to the decomposition of
  • Carbohydrates
  • Fats
  • Proteins
  • Vitamins
Answer: D
4.Disposal to sewage in large cities, is done in
  • Irrigation
  • Dilution
  • Oxidation
  • Putrefaction
Answer: B
5.Aerobic bacteria
  • Flourish in the presence of free oxygen
  • Oxidise organic matter in sewage
  • Consume organic matter in sewage
  • All the above
Answer: D
6.Chlorination of water is done for the removal of
  • Bacteria
  • Suspended Solids
  • Sediments
  • Hardness
Answer: A
7.Fresh sewage is generally
  • Alkaline
  • Acidic
  • None
  • All the above
Answer: A
8.Industrial waste water can cause
  • Pollution
  • Contamination
  • Both A & B
  • None
Answer: C
9.The Brewery industry of alcohol use the raw materials as
  • Grains
  • Molasses
  • Fruit Juice
  • None
Answer: C
10.The requirement of boiler fed water qualities in comparison with cooling water qualities is
  • high
  • low
  • equal
  • None
Answer: A
11.____________ is used in industrial processes to dissipate large amounts of heat.
Answer: cooling water
12.____________ is used in the water/steam circuit for electricity generation in power stations.
Answer: Boiler feed water
13._____________ is the main product obtained from breweries.
Answer: Beer
14.When the waste contains excessive amount of acid or alkali, the waste requires ___________ .
Answer: Neutralization
15.Industrial wastes are biologically treatable if BOD/COD ratio is ____________ .
Answer: > 6
16.Open systems with cooling towers undergo _____________ losses.
Answer: evaporation
17.PH of industrial cooling water is kept not less than 7 to reduce or prevent ___________________
Answer: corrosion
18.Use of hard waters ________________ the efficiency of boilers.
Answer: reduces
19.The second stage of winery process is known as _____________ .
Answer: fermentation
20._____________ is the process in which the waste is held for pre-determined time in a continuously mixed basin to produce an effluent of uniform characteristics.
Answer: Equalization