Waste Management Mid - I, September - 2014

1.The coagulant widely used for sewage treatment, is
  • Alum
  • Ferric chloride
  • Ferric sulphate
  • chlorinated copperas
Answer: B
2.For treatment of sewage of a large city, you will recommend
  • A sedimentation tank and an activated sludge treatment plant
  • Sedimentation tanks
  • All of the above
  • None of the above
Answer: A
3.Which one of the following is a physical treatment process
  • Adsorption
  • Coagulation
  • Floatation
  • Ion exchange
Answer: C
4.Removal of oil and grease from waste water is known as
  • Screening
  • Skimming
  • Filtration
  • None
Answer: B
5.The main product of Breweries is
  • Wine
  • alcohol
  • Beer
  • None
Answer: C
6.pH of the boiler water in textile industry must be carefully monitored and controlled to minimise
  • Alkalinity
  • Corrosion
  • Scaling
  • Salt concentration
Answer: B
7.Non disposal of solid waste may cause the spread of
  • malaria
  • typhoid
  • rodents related plague
  • dysentery
Answer: C
8.The entire liquid waste from textile industries comes from the following operations
  • Slashing
  • scouring
  • desizing
  • Above all
Answer: D
9.Volume reduction of effluent is one of the following treatment
  • Secondary
  • Primary
  • Tertiary
  • Preliminary
Answer: D
10.Various factors on which self purification of rivers depend on
  • Temperature
  • D.O.
  • Turbulence
  • All
Answer: D
11.In domestic sewage the pH values normally vary from 7.0 to ________ .
Answer: 7.5
12.____________ and ________________ undergo biodegradation and their pollution potentials are usually expressed in terms of BOD.
Answer: Organic suspended and dissolved solids
13.When the industrial waste is treated along with municipal sewage, the waste is subjected to an unit operation Known as ______________ .
Answer: Proportioning
14.A ____________ is an enclosed vessel that provides a means for combustion heat to be transferred into water until it becomes heated water or steam.
Answer: Boiler
15.Industrial water contains large variety pollutants which are categorized as _________ and ________ .
Answer: Organic and inorganic
16.Holding effluent in a basin for a particular detention time to achieve uniform characterization is ____________ .
Answer: Equalization
17._____________ wastes are corrosive to both metallic and concrete structures.
Answer: Acidic
18.When free acid reacts with the natural alkanity of the water produces ____________ hardness.
Answer: Carbonate
19.Use of hard waters ________________ the efficiency of boilers.
Answer: Reduces
20.Water colour quality standard on cobalt scale in general for textiles industry is ______________ .
Answer: 20