NSC206 List of tma Questions (NOUN)

Q1 Community drinking water treatment systems depend primarily on:
 Rain water
 Surface water
 Groundwater
 Tap waterQ2 Which of the following is TRUE regarding water systems throughout the world?
 No citizen of the world has died from contaminated water in the last 10 years.
 Hazardous chemicals from manufacturing do not infiltrate water systems in the world.
 Over one billion people (nearly one fifth of the worldâ??s population) lack access to safe water.
 Water shortages are not a concern in the WorldQ3 . What is NOT the best method to remove water borne parasites, such as Guardia, Cryptosporidium and worm eggs ?
 WaterGuard
 Pretreat water with alum
 Filter water with a 1 micron â??absoluteâ? filter pore size that complies with NSF standard 53
 Boiling.

Q4 Water is usually disinfected by using
 Fluoride.
 Chlorine.
 Filtration.
 Screening

Q5 Water Safety Plan (WSP) is divided into the following steps except:
 Screening and monitoring
 System Assessment
 Operational Monitoring
 Management and communication

Q6 Water Safety Plan (WSP) is an effective means of_______________,
 Risk management through a systematic approach in which risks from catchments to consumers are identified and mitigated
 Prevention of contamination of water at all stages of their production
 Prevention of high-risk health problem for humans
 Amount of water vapor in the atmosphere

Q7 Safe water should be located within a distance of ____________from the household residence.
 50 metres
 100 metres
 200 metres
 300 metres

Q8 Each of the following is one of the major classes of outdoor pollutants except:
 Carbon oxides
 Smog
 Nitrogen oxides
 Photochemical oxidants

Q9 Ozone which contributes to the formation of smog is found in the:
 Troposphere
 Thermosphere.
 Mesosphere.
 Stratosphere

Q10 The long-term health effects of indoor air pollution ________.
 Is considered to be a minor hazard compared to outdoor air pollution
 Is so subtle or slow that they have not yet been detected.
 Has only a few causes, which can easily be remedied
 Is primarily caused by CFCs

Q11 Particulate matter dispersed as aerosols ________.
 Includes nitrogen oxides
 May cause damage to respiratory tissues when inhaled
 Binds with hemoglobin, preventing hemoglobin’s binding with oxygen
 Interacts only with surface tissues of humans, causing mild irritation

Q12 A great deal of indoor air pollution comes from ________.
 Outdoor pollution
 Carbon monoxide
 Cooking
 Combustion, building material and bio aerosols

Q13 One of the problems that occur as a consequence of green house effect is ________.
 Increasing skin cancer in humans
 Toxins accumulating in homes
 Damage to human red blood cells
 Movement of toxins into lakes and rivers, which poisons fish

Q14 Carbon monoxide is ________
 Caused by ozone depletion
 A major component of the atmosphere
 Extremely damaging to human blood
 Produced by plants during photosynthesis

Q15 Sources of air pollution come from:
 Coal-fired electrical plants
 Evaloration of solvents
 Natural and anthropogenic sources
 internal combustion engines

Q16 ____ cleanses itself of some air pollutants in a few hours or days as the larger particles settle to the surface and soluble gases and particles encounter precipitation or are removed through contact with surface objects.
 Stratosphere
 Mesosphere
 Troposphere
 Lithosphere

Q17 The largest portion of atmospheric gases by weight is:
 Oxygen
 Nitrogen
 Sulfur
 Ozone

Q18 The ozone layer protects the earth from excessive
 Radon exposure
 Nuclear radiation
 Ultraviolet radiation
 Chlorofluorocarbons

Q19 The increase in the concentrations of greenhouse gases is primarily the result of:
 The release of CFCs
 Energy use in the developed world
 Heavy metal contamination
 The gases take up heat from the sunlight but do not allow it to go out

Q20 Regarding the greenhouse effect
 Carbon dioxide is the major human-made contributor to global warming
 Water vapor has little to do with this effect
 It is caused solely by man-made gases
 SO­2 gases are precursors.