NOUN TMA Solutions: EHS409 - Sewage & Waste Water management

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Adele
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NOUN TMA Solutions: EHS409 - Sewage & Waste Water management

Postby Adele » Mon Jul 09, 2018 9:47 am

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Q1 Which of the following involves biological treatment of wastewater?

Filtration

Q2 Which of the following does not influence sewage treatment system sizes?

Atmospheric conditions


Q3 Which of the following does not belong to the types BOD?

Total suspended solid (TSS)

Q4 Which among the following treatment methods can be used at all stages in sewage treatment?

Chlorination.

Q5 When two properties share a system prior to its connection in a local authority sewer, it is termed?

Private shared drainage system

Q6 When particles to be removed do not settle out of solution easily which method is used?

Dissolved Air Flotation ( DAF).

Q7 What is used to test the strength of untreated municipal and biodegradable industrial waste waters?

BOD

Q8 What is the main aim of physical treatment process?

To protect the main treatment systems from possible damage or clogging.

Q9 What is the essence of the use of comminutor?

To cut solids as the cylinde r rotates reducing then their sizes

Q10 What is potable water?

It is free from pathogens and chemicals that are dangerous to human h ealth.

Q11 Important information that need to be obtained through the analysis of wastewater flow rate data include the following except?

Water volume


Q12 Among the discrete characteristics of residential wastewater, which one does not belong to that of the wastewater quality?

Individual activity flows.


Q13 The two parameters used to measure wastewater strength and treatment performance relating to organic/inorganic matter are?

TSS and BOD 5

Q14 Which of the following does not belong to the types BOD?

Total suspended solid (TSS)

Q15 What is used to test the strength of untreated municipal and biodegradable industrial waste waters?

BOD

Q16 The amount of oxygen used over a five days period by micro organisms as they compose the organic matter on sewage at a temperature of 200c (680f) is termed?

Biochemical oxygen demand (BOD5)

Q17 Which of these does not belong to non sewage source?

Storm water

Q18 Restaurants and bars always have high strength waste that makes sewage treatment difficult. The management practices that can be taken to facilitate treatment include all except?

Not limiting food particles and alcohol going down the drain

Q19 Which of the following is not a major source of wastewater?

High efficienc y furnaces

Q20 Which of the following does not influence sewage treatment system sizes?

Atmospheric conditions





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Adele
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Re: NOUN TMA Solutions: EHS409 - Sewage & Waste Water management

Postby Adele » Mon Jul 09, 2018 9:50 am

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Q21 Which of the following is a protozoan caused disease?

Amoebic dyse ntery

Q22 The Health Act1958 makes provision for the prevention and abatement of conditions and activities that are, or may be, offensive or dangerous to 􀳦?􀳦􀳦?􀳦.

Public Health

Q23 Disposal regulations are sets of standards, rules and regulations that govern the disposal of 􀳦?􀳦􀳦?

wastewater

Q24 In advanced treatment, the degree of treatment is usually achieved by􀳦?􀳦􀳦?􀳦..methods as well as 􀳦?􀳦􀳦?􀳦. methods to produce high quality effluent water.

chemical and physica l

Q25 The purpose of primary treatment is to reduce the velocity of the wastewater sufficiently to􀳦?􀳦􀳦? 􀳦..and floatable materials to surface.

permit so lids to settle

Q26 When undertaking an assessment of the real cost of employing any given method of wastewater disinfection, it is necessary to consider both human and environmental risks, which may be 􀳦?􀳦..

tangible and or intang ible.


27 Disinfection by-products also have the potential to 􀳦?􀳦􀳦?􀳦. in the aquatic environment.

bioaccu mulate

Q28 A significant environmental risk associated with lagoon-based disinfection, is the potential for the excessive growth of undesirable organisms, such as 􀳦?􀳦..

blue-gree n algae.

Q29 The potential environmental risks associated with UV are less compared to other methods, but may include 􀳦?􀳦􀳦?􀳦..of the microbial population present in the discharge.

photo-reactivation and mutatio n

Q30 Microfiltration only poses a risk to the environment if there is a spill of cleaning agents or the contaminated backwash waste is disposed of􀳦?􀳦􀳦?􀳦􀳦?􀳦

incorrectly

Q31 􀳦?􀳦􀳦?􀳦􀳦?􀳦...disposal of wastewater, whether by surface, subsurface methods or dilution, is dependent on its treatment prior to disposal.

Satisfactory

Q32 A typical TSS value is 􀳦?􀳦... milligrams per liter

60

Q33 Free oxygen (O2) is needed for􀳦?􀳦􀳦?􀳦. treatment to take place.

aerobic

Q34 􀳦?􀳦􀳦?􀳦􀳦?􀳦􀳦?􀳦.. is defined as having molecular oxygen (free oxygen, O2) as a part of the environment or a biological process that occurs only in the presence of molecular oxygen

aerobic

Q35 􀳦?􀳦􀳦?􀳦􀳦?􀳦􀳦?􀳦􀳦?􀳦􀳦?􀳦. is influenced mainly by temperature, barometric pressure (altitude), and water salinity

Dissolved Oxygen

Q36 􀳦?􀳦􀳦?􀳦􀳦?􀳦􀳦?􀳦..is a measure of the amount of organic matter oxidized by a strong chemical oxidant

COD

Q37 NBOD stands for􀳦?􀳦􀳦?􀳦􀳦?􀳦􀳦?􀳦􀳦?􀳦􀳦?􀳦􀳦?􀳦..

Nitrogenous Biochemical Oxygen De mand

Q38 􀳦?􀳦􀳦?􀳦􀳦?􀳦􀳦?􀳦.. is the quantity of dissolved oxygen consumed by microorganisms during the breakdown of organic carbon in a wastewater sample during an incubation period of 5 days at 20°C

CBOD

Q39 􀳦?􀳦􀳦?􀳦􀳦?􀳦􀳦?􀳦􀳦?􀳦􀳦?􀳦􀳦?􀳦... is a measure of the oxygen required by bacteria, chemicals, and other organisms to break down organic matter over a five day period.

BOD

Q40 􀳦?􀳦􀳦?􀳦. lays down the procedure to be adopted by those who wish to connect their drainage systems to the public sewer.

Public Health Ordin ance




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Adele
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Re: NOUN TMA Solutions: EHS409 - Sewage & Waste Water management

Postby Adele » Mon Jul 09, 2018 9:52 am

Q41 Which of these is not an advantage of rectangular basin?

Maximum short circuiting.

Q42 What happens in the sludge zone in a sedimentation tank?

It is where settled material collects and is pumped out.

Q43 What does the acronym HACCP stand for?

Hazard analysis and critical control point.

Q44 What basic actions are required during the construction of the large basins to effect flow equalization?

Aeration and mixing to prevent odour and dep osition of solids.

Q45 Wastewater sewerage system can be classified into all these except?

Adopted sewerage

Q46 Wastewater has some impacts, which of these is not one of them?

It does not cause blockage of our drainage lines.

Q47 Two types of currents exist in the sedimentation basin, the one produced by the flow of the water coming into the tank and leaving same is known as?

Eddy current

Q48 The two parameters used to measure wastewater strength and treatment performance relating to organic/inorganic matter are?

TSS and BOD 5

Q49 The situation where both storm water and waste water are carried in one sewerage system is termed?

Combined sewerage

Q50 The separation of colloidal and suspended material by floatation and dissolved organic matter by adsorption is known as?

Foam fractionation

Q51 The process of removing various forms of phosphate without increasing the concentration of sulphate is known as?

Sorption

Q52 The process of letting suspended materials settle by gravity is known as?

Sediment ation.

Q53 The activated sludge process can be used for one or several of the following, except?

Removing bigger substances during preliminary treatment of wastewater


Q54 Which of these is most likely not a component of domestic wastewater?

radio active element

Q55 Which of these does not belong to non sewage source?

Storm water

Q56 Which of the following options available for sludge treatment is costliest?

Incineration .

Q57 Which of the following is not a major source of wastewater?

High efficienc y furnaces

Q58 The amount of chlorine required to prevent microbial re-growth and hence re-contamination of distribution and storage systems during wastewater treatment is called?

aesthetic threshol d chlorine level.

Q59 Which of the following is a protozoan caused disease?

Amoebic dyse ntery

Q60 Wastewater has some impacts, which of these is not one of them?

It does not cause blockage of our drainage lines.



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Adele
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Re: NOUN TMA Solutions: EHS409 - Sewage & Waste Water management

Postby Adele » Mon Jul 09, 2018 9:54 am

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Q61 Select the odd one from the list.

Septic tanks.

Q62 Sedimentation tanks are divided into separate zones, the correct order of such division is?

Inlet zone, settling zone, sludge zone, outlet zone.

Q63 Reverse osmosis is used in all these except?

Electroplating of metals.

Q64 All these are kinds of wastewater except?

Tap water

Q65 An isolated waste stream consisting of urine collected from specific fixtures and not contaminated by faeces or diluted by graywater sources is known as

Yellow wate r

Q66 Wastewater sewerage system can be classified into all these except?

Adopted sewerage

Q67 The situation where both storm water and waste water are carried in one sewerage system is termed?

Combined sewerage

Q68 When two properties share a system prior to its connection in a local authority sewer, it is termed?

Private shared drainage system

Q69 The domestic wastewater other than that which comes from the toilet is known as?

Gray Water

Q70 Which of these represents another name for sullage water ?

Gray water

Q71 The process of addition of chemical to the wastewater converting undesired soluble substances into an insoluble precipitate which can be removed easily is known as?

Chemical preci pitation

Q72 The primary removal mechanism in ultrafiltration is?

Size exclusion

Q73 The pathogenic organism that has been used effectively in germ or biological warfare is known as?

Bacillus anthracis

Q74 The major difference between ultrafiltration and microfiltration, nanofiltration or gas separation is?

The size of the molecules it retains.

Q75 The impingement, bubbling, atomizing and electrostatic membrane filter devices are used for?

Collection of air for sampling

Q76 The first unit operation used in the wastewater treatment plant is known as?

Screening

Q77 The domestic wastewater other than that which comes from the toilet is known as?

Gray Water

Q78 The bacteria used in the baking of bread ( Bakers yeast ) which helps in the rising of bread is known as?

Saccharomyces cerevisiae

Q79 The amount of oxygen used over a five days period by micro organisms as they compose the organic matter on sewage at a temperature of 200c (680f) is termed?

Biochemical oxygen de mand (BOD5)

80 The amount of chlorine required to prevent microbial re-growth and hence re-contamination of distribution and storage systems during wastewater treatment is called?

aesthetic threshol d chlorine level.





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