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16th June 2015, 09:32 AM
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Join Date: Apr 2013
Re: PTU EVS Question Papers

Here I am providing the list of few questions of Punjab Technical University Environmental Science exam question paper which you are looking for .

Q: 1 What do you mean by Zooplanktons?
Ans: All the tiny aquatic animals eaten by fish are known as Zooplankton.

Q: 2 What is yard waste?
Ans: Leaves, grass, clippings and other organic wastes produced as part of yard and garden development and maintenance.

Q: 3 What do you mean by wetland?
Ans: Semi-aquatic land, land that is either incmlated or saturated by water for varying periods of time during each year, and that supports aquatic vegetation which is specifically adapted for saturated soil conditions.

Q: 4 What are volatile organic compounds? (VOC)
Ans: VOC: are made as secondary petrochemicals. They include light alcohols, acetone, trichloroethylene, benzene, vinyl chloride etc.

Q: 5 What is vermicomposting?
Ans: The use of red worms to compost organic waste is known as vermicomposting.

Q: 6 Define Turbidity.
Ans: The property of water which prevents the passage of light through it , usually caused by the presence of light through it , usually caused by the presence or suspended and colloidal impurities in water.

Q: 7 What is Trammel?
Ans: A rotary cylindrical season that is typically inclined at a downward angle that, combined with the tumbling action of trammel, separates materials of different density.

Q: 8 Define thermal pollution?
Ans: The impairment of water quality through temperature increase usually occurs as result of industrial cooling water discharge.
Q: 9 Define Sedimentation.
Ans: The gravity settling, and thus removal of materials more dense than the suspending fluid.

Q: 10 What do you understand by photochemical smog?
Ans: Air pollution caused by chemical reaction of various pollutants emitted from different sources.

Q: 11 Define source reduction.
Ans: The elimination or reduction of the waste of the source by modification of the actual process which produces the waste.

Q: 12 What is Runoff?
Ans: Water from precipitation or irrigation that flows over the ground surface and returns to streams. It can collect pollutants from the air or land and carry them to the receiving water.

Q: 13 What is rubbish?
Ans: Solid waste that does not contain food waste is known as Rubbish.

Q: 14 What is Radon?
Ans: Colorless, odorless radioactive gas formed by the decay of radium. When trapped in buildings concentrations build up, and it can cause health hazards such a lung cancer.

Q: 15 Define risk assessment.
Ans: The qualitative and quantitative evolution performed in an effort to define the risk posed to human health and/or the environment by the presence or potential presence/or use of specific pollutants.

Q: 16 Define Prokaryotic organisms?
Ans: Organisms which do not have a cellular membrane.
Q: 17 'Pesticides' define it?
Ans: A substance or mixture of substance intended for preventing, destroying, repelling, or mitigating any pest.

Q: 18 Define Plume.
Ans: In water terms, the extent or boundary of the spread of underground soil or water contamination. In air, a visible emission from a flue or chimney.

Q: 19 What is ozone layer?
Ans: The layer of the upper atom in which a concentration absorbs a significant amount of potentially, hazardous ultraviolet radiation.

Q: 20 What is PET?
Ans: It is polyethylene Terapthlene, a type of plastic that is clear or coloured transparent with high gloss. It is used for carbonated beverage bottles and some household cleanser container.

Q: 21 What do you mean by organic compounds?
Ans: Chemical compounds containing carbon. Historically organic compounds were
obtained from vegetable or animal sources.

Q: 22 Define Nitrification?
Ans: The biological oxidation of ammonia and ammonium sequentially to nitrate and then nitrate. It occurs naturally in surface waters and can be engineered in waste water treatment.

Q: 23 Define Nitrogen fixation.
Ans: The conversion of atmospheric (or dissolved) nitrogen gas into nitrate by microorganisms.

Q: 24 What is NGO?
Ans: It is Non governmental organization central around a cause or causes that works outside the sphere of government.

Q: 25 'Non point source' comment on it.
Ans: Water contaminant that can't be traced to a specific point of origin but rather comes from many different non-specific sources.

Q: 26 Define Mycorrhizae.
Ans: A symbiotic soil fungi, present in most soils that attack themselves directly on to the roots of most plants. They help the host plants absorb more water and nutrients while the host plants provide food for the fungi.

Q: 27 What do you mean by Land filling?
Ans: The placement of wastes into the land under controlled conditions to minimize their migration or effect on the surrounding environment.

Q: 28 Define leaching process.
Ans: The act of dissolving the soluble position of a solid mixture by some solvent. An example is the dissolving of inorganic or organic contaminants from refuse in a landfill by infiltrating rain water.

Q: 29 Define LLDPE.
Ans: It is linear low density polyethylene.

Q: 30 What do you understand by Incineration?
Ans: The process of burning wastes under controlled conditions is known as Incineration.

Q: 31 What is Hydrologic cycle?
Ans: A cyclic movement of water from ocean to the atmosphere by evaporation
through rain to earth's surface, through run off and ground water to streams, and back
to the sea.

Q; 32 What is inversion?
Ans: An atmospheric conditions occurring when a layer of cool air is trapped by a layer of warm air and is unable to rise. It spread polluted air horizontally rather than vertically.

Q: 33 What is Hydrofluorocarbons (HFCs)?
Ans: Chemicals with fluorine but no chlorine, and therefore likely not damaging to the ozone layer. HFCs are potent green house gases.

Q: 34 What is HUMUS?
Ans: The substance which results from decay of plant or animals matter. Biodegradable matter from humus as they decompose.

Q: 35 What are various hazardous waste?
Ans: Waste materials that are inherently dangerous in contact, handling and disposal. Radioactive materials and some biological wastes are also considered hazardous.

Q: 36 What is Esturay?
Ans: Special environments at the mouth of coastal rivers where fresh water meets sea water.

Q: 37 What is Eukaryotic organisms?
Ans: Organisms which possess a nuclear membrane. This includes all known organisms except viruses and bacteria.

Q: 38 What is food chain?
Ans: A sequence of organisms, each of which uses the next, lower member of the sequence as a food source.

Q: 39 What is food web?
Ans: A complex intermeshing of individual food chain is an ecosystem.

Q: 40 Define term Genome.
Ans: All the genes of a particular organism or species is known as Genom.

Q: 41 What is global warming?
Ans: The long term warming of planet due to increases in green house gases which trap reflected light preventing it from exiting to space reflected light preventing it from exiting to space.

Q: 42 What is EIA?
Ans: It is environmental Impact assessment, the critical appraisal, both positive and negative of the likely effects of a proposed project, development, activity or policy on the environment.

Q: 43 What is NIMBY?
Ans: THE "Not in my backyard" response to building waste management facilities.

Q: 44 Define water-logging?
Ans: Saturation of soil with irrigation water as excessive precipitation so that water table rises close to surface.

Q: 45 What is teratogens?
Ans: Chemicals or other agents that cause abnormalities during embryonic growth and development.

Q: 46 What is biological control against pollution?
Ans: Biological Control: The use of one or more organisms to control the population size of another organism. The regulation of plant and animal numbers by natural enemies.

Q: 47 What is zero population growth? (ZPG)
Ans: When birth and immigration in a population just equals deaths and emigration is known as ZPG.

Q: 48 What is Unconfined aquifer?
Ans: It is groundwater above a layer of earth material with low permeability.

Q: 49 Define Rehabilitation?
Ans: It is Re establishing the outers or restructuring the ecological system that has been degraded.

Q: 50 Define Salinity.
Ans: It is amount of soluble salts in water or soil.

Q: 51 Define abiotic.
Ans: All the non-living things are called abiotic.

Q: 52 What do you mean by acid rain?
Ans: Toxic gases like SOx and NOx dissolve to form sulphuric acid and nitric acid. When these dissolved gases in rain water causes on earth is called acid rain.

Q: 53 What is air pollution?
Ans: Toxic chemicals, excess heat or noise present in the atmosphere in
concentrations that are or may be harmful to humans, other animals or plants is called air pollution.

Q: 54 Define altitude.
Ans: The height above sea level is called altitude.

Q: 55 What do you mean by bioaccumulation?
Ans: The accumulation of non-biodegradable substances in the body is called bio-accumulation,

Q: 56 What is biodiversity?
Ans: Total variability among species of plants, animals and microorganisms is called bio-diversity.

Q: 57 What do you mean by Coliform bacteria?
Ans: A coliform bacterium is a bacteria living in the Colon region of human intestine, used as an index of faecal contamination of water.

Q: 58 What is over population?
Ans: When resource use is at a very high rate resulting in large scale waste generation and environmental degradation, found in developed nations with less population.

Q: 59 What is contour forming?
Ans: Planting across the changing slope rather than in straight lines, to reduce water and soil loss on hills.

Q: 60 What do you mean by Confined aquifer?
Ans: Aquifer between two relatively impermeable layers of earth.

Q: 61 What do you mean by transition?
Ans: A pattern of falling death rates and birth rates in response to improved living conditions due to industrialization.

Q: 62 What is ecology?
Ans: Study of interactions of living organisms with their biotic and abiotic environment.

Q: 63 What do you mean by ecological services?
Ans: Processes or materials provided by ecosystems like pure air, water, nutrients.

Q: 64 What is doubling time?
Ans: Time taken by something (population) to double itself.
Q: 65 What is drip irrigation?
Ans: Use of perforated tubes that give out water drop wise to the soil around each plant.

Q: 66 What do you mean by eco-centric?
Ans: A life view advocating moral valves and rights both for the human beings and the earth.

Q: 67 What do you mean by ecosystem?
Ans: A biological community and its physical environment exchanging matter and energy.

Q: 68 What are electromagnetic radiations?
Ans: Kinetic energy moving as electromagnetic waves eg. TV waves, radio waves, volatile light etc.

Q: 69 What do you mean by epiphyte?
Ans: Plants that grows on a substrate like branches of a tree but not on soil, common in tropical forests.

Q: 70 What do you mean by extinction?
Ans: Loss of species from the earth, a species is said to be extinct if it is not seen in the wild for 50 yrs.

Q: 71 What do you mean by fauna?
Ans: All the animals present in a given region.

Q: 72 What do you mean by flora?
Ans: All plants present in a given region.

Q: 73 What do you mean by fossil fuels?
Ans: Fuels produced due to fossilization of plants/animals like petroleum, coal, natural gas.

Q: 74 What do you mean by humus?
Ans: A dark amorphous substance that is partially degraded and serves as a major source of nutrients to plants.

Q: 75 What is an insolation?
Ans: Incoming solar radiations.

Q: 76 What do you mean by industrial smog?
Ans: Air pollution due to a mixture of sulphur dioxide suspended solid particles.
Q: 77 What do you mean by infant mortality rate?
Ans: No. of infants per 1000 born that die before their first birthday.

Q: 78 What do you mean by invertebrates?
Ans: Animals that have no back bone.

Q: 79 What do you mean by mycorrhiza?
Ans: Mutually beneficial association between a fungus and roots of higher plants.

Q:80 what do you mean by nicke.
Ans The functional role and position of the species in an eco system i.e what resources in uses how does it intract with other species etc.

Q:- 81 What is an ore ?
Ans A metal yielding material

Q:- 82 What is PAN ?
Ans Peroxyaiyl nitrate :- A group of chemicals causing chemical amog

Q:- 83 What do you mean by phytoplankton ?
Ans Small plants like bacteria found floating on the source of mater .

Q:- 84 What do you mean by poaching ?
Ans Illegal commercial hunting or fishing.


Q:- 85 What is EIA ?
Ans A systematic analysis of the effects of a major devlopment project it.

Q:- 86 What is gasohol ?
Ans afuel thating a mixture of gas olive & alcohol

Q:- 87 What a GNPI ?
Ans Gross national product , anindex of a economic devlopment .

Q:- 88 What is gulyerosion ?
Ans Removal of layers of joil creating large chemicals

Q:-89 What do you mean by mutation ?
Ans Chemical or ionizing radiation that cause mutation .


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