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Ringelmann chart is used for the evaluation of _____________ pollution?
Related MCQs
The main pollutant in waste water discharged from a petroleum refinery is oil (both in free and emulsified form). Free oil is removed by__________?
Noise emitted by a ventilation fan at a distance of 3 metres is about __________ decibels?
Presence of __________ in water stream are deleterious to aquatic life?
Tolerable limit of nitrogen oxides in air is __________ ppm?
BOD of raw municipal sewage may be in the range of about __________ mg/litre?
Iron & manganese present in the polluted water is removed by __________?
TLV of aldrin in public water supply system is about __________ μg/litre?
Aerobic biological oxidation ponds used for the purification of polluted water__________?
Presence of excess fluorine in water causes__________?
Direct reaction of unsaturated hydrocarbons with either NO or NO2 produces an eye irritating pollutant compound known as__________?
Dissolved oxygen content in river water is around __________ ppm?
Maximum allowable concentration of CO2 in air for safe working is __________ ppm (parts per million)?
__________ substances present in sewage are removed in grit chamber during sewage treatment?
Industrial workers working in leather tanning & manufacturing units are prone to suffer from __________?
Phenolic water generated in coke ovens & by-product plant attached to an integrated steel plant containing phenol in concentration of less than 100 mg/litre can be removed by__________?
Ionisation potential employed in the industrial electrostatic precipitator is of the order of__________?
Noise level during normal conversation among men is about __________ decibels?
Exposure to small amount of __________ results in high blood pressure & heart disease in human beings?
Which of the following acts as a natural source of air pollution ?
Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes__________?
Tri-sodium phosphate is used in boiler water treatment to reduce__________?
Which of the following is the most major constituents of air pollutants ?
__________ cannot control the noise pollution ?
Fluorosis (a bone disease) is caused by the presence of high concentration of __________ in atmospheric air?
Death may occur, when SO2 concentration in atmospheric air exceeds __________ ppm?
Sound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about __________ decibels?
Most of the atmospheric air pollutants are present in large quantity in__________?
__________ is removed from water by lime-soda process?
Atmospheric pollution caused by the exhaust gas of supersonic transport air-crafts is mostly in the atmospheric region called__________?
Which of the following is the most detrimental for water used in high pressure boiler ?
Septic tanks are used for the __________ of the deposited solids?
Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly __________ substances?
Particulates (< 1μm size) remaining suspended in air indefinitely and transported by wind currents are called__________?
The type of bacteria which is active in trickling filter during biological treatment of sewage is the __________ bacteria?
Presence of __________ hardness is responsible for the temporary hardness in water?
Bag filter design is predominantly dependent on gas temperature, as it affects the gas density & viscosity and the selection of filtering material. The pressure drop in a bag filter is__________?
Limestone powder is injected during pulverised coal burning in boilers to __________ the flue gases?
The main industrial source of emission of hydrogen sulphide air pollutant is__________?
Replenishment of dissolved oxygen in water stream polluted with industrial waste occurs by__________?
Thermal pollution due to excessive heat & temperature in the working place causes__________?
Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in__________?
Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes__________?
Pick out the one which is not a chemical coagulant ?
Presence of dissolved impurities of __________ is responsible for the red brownish color of water?
The concentration of water vapour in troposphere, which depends upon the altitude & temperature, varies in the range of zero to __________ percent?
Turbidity of water is an indication of the presence of__________?
‘Particulate’ air pollutants are finely divided solids and liquids. Which of the following is not a „particulate‟ ?
During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum ?
Carbon monoxide is a pollutant, which causes__________?
In water treatment, alum [Al2(SO4)3] is used for the process of __________?
Which of the following is not a secondary air pollutant ?
Ringelmann chart is used for the evaluation of _____________ pollution?
A. Air
B. Water
C. Noise
D. Radioactive
Correct Answer:
Air
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Last Updated:
July 28, 2023