New Chemical Engineering MCQs – Latest Chemical Environmental Engineering MCQs
This post is comprising of latest ” Chemical Environmental Engineering MCQs – Latest Competitive Chemical Engineering MCQs “. Here you’ll get latest chemical engineering mcqs for written test, interview with answers. If you want to improve your knowledge regarding chemical engineering then read these mcqs of Design of Steel Structures.
Latest Chemical Engineering MCQs
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Latest Chemical Environmental Engineering Mcqs
The most occurred mcqs of Chemical Environmental Engineering in past papers. Past papers of Chemical Environmental Engineering Mcqs. Past papers of Chemical Environmental Engineering Mcqs . Mcqs are the necessary part of any competitive / job related exams. The Mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Chemical Environmental Engineering Mcqs. The Important series of Chemical Environmental Engineering Mcqs are given below:
Presence of high concentration of ozone and smog in atmospheric air causes the __________________?
A. Fading of dye on textiles
B. Cracking of rubber products
C. Embrittlement & decrease of folding resistance of paper
D. Damage of electrical insulator on high tension power line
Which of the following air pollutants is not toxic to vegetation i.e., doesn’t cause vegetation damage ?
A. Hydrogen fluoride & nitrogen oxides
B. Smog & ozone
C. Sulphur dioxide & spray of weed killers
D. Carbon monoxide
Exposure to chemicals having carcinogenic properties cause___________________?
A. Asphyxiation
B. Cancer
C. Dermatitis (skin disorder)
D. Asthma
High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes____________________?
A. Cancer
B. Reduced crop yield
C. Respiratory disease (e.g., asthma)
D. Silicosis
A ‘body’ which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the________________?
A. Atmospheric effect
B. Green house
C. Global warming
D. Ionosphere
The amount of chemical coagulant added for treatment of polluted water ______________ with increase in temperature of the polluted water to be treated?
A. Decreases
B. Remain constant
C. Increases
D. May increase or decrease; depends on the chemical characteristics of polluted water
Foaming and priming in boiler operation can be reduced by reduction in ______________ in feed water?
A. Color (Hazen)
B. Turbidity
C. Total solids
D. All A., B. & C.
Which of the following is a green house gas other than CO2 ?
A. Nitrous oxide
B. Methane
C. Chlorofluoro carbons (CFC)
D. All A., B. and C.
Aerodynamic noise resulting from turbulent gas flow is the most prevalent source of valve noise in fluid flow control. It is caused due to_________________?
A. Shear forces
B. Reynold stresses
C. Both A. & B.
D. Neither A. nor B.
Acute danger to human life (i.e. death) exists, if the concentration of CO2 in atmospheric air exceeds ______________ percent (by volume)?
A. 3
B. 1
C. 7
D. 20
Shouting by a man at his full voice corresponds to a voice level of about _____________ decibels?
A. 50
B. 25
C. 80
D. 120
Which of the following dust collection equipments is the least efficient (for sub-micronic particles) ?
A. Dust catcher (gravity type)
B. Bag filter
C. Cyclone separator
D. Hollow wet scrubber
Which of the following is not a secondary air pollutant ?
A. Photochemical smog
B. Ozone
C. Sulphur dioxide
D. All A., B. & C.
In water treatment, alum [Al2(SO4)3] is used for the process of __________________?
A. Sedimentation
B. Coagulation
C. Filtration
D. Disinfection
Chemical Process Mcqs
Carbon monoxide is a pollutant, which causes_________________?
A. Retardation in crop growth
B. Asphyxiation (suffocation) leading to death
C. Respiratory disease (e.g. asthma)
D. Damage to building materials like marble
During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum ?
A. Idle running
B. Cruising
C. Acceleration
D. Deceleration
‘Particulate’ air pollutants are finely divided solids and liquids. Which of the following is not a „particulate‟ ?
A. Smoke & fumes
B. Dust & mists
C. Photochemical smog & soot
D. None of these
Turbidity of water is an indication of the presence of__________________?
A. Suspended inorganic matter
B. Floating solids
C. Dissolved solids
D. Dissolved gases
The concentration of water vapour in troposphere, which depends upon the altitude & temperature, varies in the range of zero to ______________ percent?
A. 8
B. 4
C. 1
D. 12
Presence of dissolved impurities of ______________ is responsible for the red brownish color of water?
A. Bi-carbonates
B. Carbonates
C. Iron & manganese
D. Arsenic
Pick out the one which is not a chemical coagulant ?
A. Ferrous sulphate
B. Aluminium sulphate
C. Hydrated lime
D. Chloramine
Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes________________?
A. Anaemia
B. Blood poisoning
C. Nervous system disorder
D. All A., B. and C.
Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in___________________?
A. Food industry
B. Petroleum refinery
C. Municipal sewage treatment
D. Iron & steel plant
Thermal pollution due to excessive heat & temperature in the working place causes__________________?
A. Fatigue
B. Reduction in working efficiency of manpower
C. High breathing rate
D. All A., B. & C.
Replenishment of dissolved oxygen in water stream polluted with industrial waste occurs by________________?
A. Photosynthetic action of algae
B. Natural aeration of water stream
C. Both A. & B.
D. Neither A. nor B.
The main industrial source of emission of hydrogen sulphide air pollutant is________________?
A. Pulp and paper plant
B. Coal based thermal power plants
C. Petroleum refineries
D. Metallurgical roasting & smelting plant
Limestone powder is injected during pulverised coal burning in boilers to ______________ the flue gases?
A. Reduce SO2 content in
B. Increase the dew point of
C. Catalytically convert SO2 to SO3 in
D. None of these
Thermodynamics Mcqs
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__________________?
A. Inversely proportional to viscosity of gas
B. Proportional to the pressure of the gas
C. Proportional to the viscosity & density of the gas
D. Both B. and C.
Presence of _____________ hardness is responsible for the temporary hardness in water?
A. Chloride
B. Calcium
C. Carbonate
D. Sulphate
The type of bacteria which is active in trickling filter during biological treatment of sewage is the _____________ bacteria?
A. Saprophytic
B. Anaerobic
C. Aerobic
D. Parasitic
Particulates (< 1μm size) remaining suspended in air indefinitely and transported by wind currents are called_________________?
A. Mists
B. Fumes
C. Smoke
D. Aerosols
Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly _____________ substances?
A. Organic
B. Radioactive
C. Inorganic
D. None of these
Septic tanks are used for the ______________ of the deposited solids?
A. Aerobic decomposition
B. Anaerobic decomposition
C. Separation
D. None of these
Which of the following is the most detrimental for water used in high pressure boiler ?
A. Silica
B. Phenol
C. Turbidity
D. Dissolved oxygen
Atmospheric pollution caused by the exhaust gas of supersonic transport air-crafts is mostly in the atmospheric region called________________?
A. Troposphere
B. Stratosphere
C. Thermosphere
D. Mesosphere
____________ is removed from water by lime-soda process?
A. Iron and manganese
B. Foul smell and taste
C. Temporary hardness
D. Permanent hardness
Most of the atmospheric air pollutants are present in large quantity in__________________?
A. Thermosphere
B. Stratosphere
C. Troposphere
D. Mesosphere
Sound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about ______________ decibels?
A. 150
B. 120
C. 90
D. 180
Death may occur, when SO2 concentration in atmospheric air exceeds ______________ ppm?
A. 100
B. 20
C. 400
D. 200
Fluorosis (a bone disease) is caused by the presence of high concentration of ____________ in atmospheric air?
A. Hydrogen sulphides
B. Hydrogen fluoride
C. Hydrocarbons
D. Nitrogen dioxide
______________ cannot control the noise pollution ?
A. Vibration damping
B. Green house gases
C. Use of silencers
D. Tree plantation
Which of the following is the most major constituents of air pollutants ?
A. Oxides of sulphur
B. Carbon monoxide
C. Oxides of nitrogen
D. Hydrogen sulphide
Tri-sodium phosphate is used in boiler water treatment to reduce____________________?
A. Suspended silica
B. Caustic embrittlement
C. Turbidity
D. Dissolved oxygen
Chemical Environmental Engineering Mcqs
Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes________________?
A. Reduced strength of textiles
B. Corrosion, tarnishing & soiling of metals
C. Fading of dyes on textiles
D. All A., B. and C.
Which of the following acts as a natural source of air pollution ?
A. Deforestation
B. Forest fire
C. Volcanic eruption
D. None of these
Exposure to small amount of ______________ results in high blood pressure & heart disease in human beings?
A. Mercury
B. Hydrogen sulphide
C. Cadmium
D. Asbestos
Noise level during normal conversation among men is about ______________ decibels?
A. 90
B. 45
C. 10
D. 115
Ionisation potential employed in the industrial electrostatic precipitator is of the order of_______________?
A. 30 to 70 kV DC
B. 230 V AC
C. 30 to 70 kV AC
D. 230 V DC
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_______________?
A. Chemical coagulation
B. Treating in biological oxygen pond
C. Chlorination
D. None of these
Industrial workers working in leather tanning & manufacturing units are prone to suffer from ___________________?
A. Silicosis
B. Skin diseases (e.g. dermatitis)
C. Respiratory ailments (e.g. bronchitis)
D. Blurred vision
____________ substances present in sewage are removed in grit chamber during sewage treatment?
A. Fatty
B. Organic
C. Inorganic
D. Dissolved
Maximum allowable concentration of CO2 in air for safe working is _____________ ppm (parts per million)?
A. 1000
B. 50
C. 2000
D. 5000
Dissolved oxygen content in river water is around _____________ ppm?
A. 5
B. 250
C. 100
D. 500
Direct reaction of unsaturated hydrocarbons with either NO or NO2 produces an eye irritating pollutant compound known as________________?
A. Benzopyrene
B. Peroxyacetyl nitrate (PAN) or methyl nitrite
C. Photochemical smog
D. Polyacrylonitrile
Presence of excess fluorine in water causes__________________?
A. Tooth decay
B. Dental cavity
C. Fluorosis
D. Respiratory disease
Aerobic biological oxidation ponds used for the purification of polluted water__________________?
A. Is not very effective for non-biodegradable substances (e.g. ABS) containing effluents
B. Destroys/removes pathogen from the sewage
C. Destroys/removes pathogen much more effectively if the sewage is chlorinated
D. All A., B. & C.
TLV of aldrin in public water supply system is about ____________ μg/litre?
A. 357
B. 17
C. 0.5
D. 1097
Iron & manganese present in the polluted water is removed by __________________?
A. Chemical coagulation
B. Oxidation followed by settling & filtration
C. Simple filtration
D. Chlorination only
BOD of raw municipal sewage may be in the range of about _____________ mg/litre?
A. 5-10
B. 1-2
C. 150-300
D. 2000-3000
Tolerable limit of nitrogen oxides in air is _____________ ppm?
A. 1
B. 0.1
C. 5
D. 25
Presence of ____________ in water stream are deleterious to aquatic life?
A. Suspended solids
B. Soluble and toxic organics
C. Heavy metals and cyanides
D. All A., B. & C.
Noise emitted by a ventilation fan at a distance of 3 metres is about _____________ decibels?
A. 125
B. 105
C. 85
D. 145
The main pollutant in waste water discharged from a petroleum refinery is oil (both in free and emulsified form). Free oil is removed by_________________?
A. Biological oxygen pond
B. Trickling filters
C. Aerated lagoons
D. Gravity separator having oil skimming devices