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Environmental engineering
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q41 ⇒ Atmospheric pollution caused by the exhaust gas of supresonic transport air-crafts is mostly in the atmospheric region called stratosphere [other wrong options] [Discuss in forum] thermosphere troposphere mesosphere |
Q42 ⇒ Presence of __________ in water stream are deleterious to aquatic life. all (a), (b) & (c). [other wrong options] [Discuss in forum] soluble and toxic organics. suspended solids. heavy metals and cynides. |
Q43 ⇒ In water treatment plant, zeolite process is used to remove the __________ of water. hardness [other wrong options] [Discuss in forum] acidity alkalinity iron & zinc |
Q44 ⇒ Workers working in __________ industry are most prone to white lung cancer. textile [other wrong options] [Discuss in forum] coal mining limestone mining asbestos |
Q45 ⇒ Which of the following is not a weightless pollutant ? SPM [other wrong options] [Discuss in forum] Thermal pollution Radioactive rays Noise pollution |
Q46 ⇒ High noise levels produced during operation of fans and compressors can be reduced by using mufflers (silencers). [other wrong options] [Discuss in forum] accoustical absorbent. lagging of noisy duct. none of these. |
Q47 ⇒ The biological decomposition of organic substances in wastes controlled conditions is called composting [other wrong options] [Discuss in forum] incineration biological oxidation none of these |
Q48 ⇒ Pick out the wrong statement Carbon monoxide present in the two stroke petrol engine exhaust is much less as compared to that emitted from a four stroke engine. [other wrong options] [Discuss in forum] Low ozone layer thickness in polar regions is due to cold climatic conditions Amount of unburnt hydrocarbons emitted by two stroke petrol engine is more as compared to that emitted by a four stroke engine. Mercury as a pollutant can enter the blood stream & the digestive system/ lungs and is responsible for causing minamate disease. |
Q49 ⇒ Pick out the wrong statement pertaining to 'green house' for the plants. Green house' is colder than the outside atmosphere. [other wrong options] [Discuss in forum] Green house' (made of glass) allows visible sunlight (i.e., short wavelength solar radiation like ultra-violet rays) to pass through the glass and heat up the soil thereby warming up plants inside it. The emitted longer wavelength radiation (e.g., infrared) is partly reflected and partly absorbed by the glass of the green house. Green house effect' in earth's atmosphere is due to increasing CO2 level in atmosphere. where CO2 acts like the glass of 'green house' thereby warming up the earth's surface. |
Q50 ⇒ Radioactive substances present in the polluted water stream can be removed by adsorption in ion exchange materials. [other wrong options] [Discuss in forum] biological oxygen treatment. coagulation and filtration. none of these. |
Q51 ⇒ Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is __________ decibels. 75 [other wrong options] [Discuss in forum] 35 95 105 |
Q52 ⇒ Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in food industry. [other wrong options] [Discuss in forum] municipal sewage treatment. petroleum refinery. iron & steel plant. |
Q53 ⇒ Which of the following is the most major constituents of air pollutants ? Oxides of sulphur [other wrong options] [Discuss in forum] Oxides of nitrogen Carbon monoxide Hydrogen sulphide |
Q54 ⇒ Green house effect is accentuated by all (a), (b) and (c). [other wrong options] [Discuss in forum] deforestation. rapid industrialisation. increased transportation activity. |
Q55 ⇒ Infective bacteria in water is killed by the __________ process. sterilisation [other wrong options] [Discuss in forum] aeration disinfection none of these |
Q56 ⇒ What is the major constituents of waste/polluted water discharged from textile, pulp & paper, tanning, distillary, dairy and meat packing industries ? Natural organic products [other wrong options] [Discuss in forum] Radioactive substances Inorganic pollutants None of these |
Q57 ⇒ Reinglemann chart is used for the measurement of the smoke density from a chimey. [other wrong options] [Discuss in forum] combustibles present in automobile exhaust. exhaust gas density. flue gas temperature. |
Q58 ⇒ The density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the troposphere [other wrong options] [Discuss in forum] ionosphere stratosphere none of these |
Q59 ⇒ Water filtration rate in a slow sand filter ranges from __________ litres/m2/hr. 100 to 200 [other wrong options] [Discuss in forum] 10 to 20 1500 to 2500 4000 to 5000 |
Q60 ⇒ The pH value of oxidised sewage is about 7.3 [other wrong options] [Discuss in forum] 1.8 6.2 13.4 |
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