Up To Date Chemical Environmental Engineering MCQs – Competitive New Chemical Engineering MCQs

Up To Date Chemical Environmental Engineering MCQs – Competitive New Chemical 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:

Which of the following is an adsorbent used for the removal of SO2 from gas/air ?

A. Silica gel
B. Limestone powder or alkalised alumina
C. Bog iron
D. Active carbon

‘Safe limit’ called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the____________________?

A. Photochemical reaction in polluted atmosphere
B. Automobiles exhaust
C. Industrial chimney exhaust
D. Burning of domestic fuel

_____________ plant emits large amount of SO2 as an air pollutant?

A. Chlor alkali
B. Sulphuric acid
C. Nitric acid
D. Iron & steel

The main type of sludge gas evolved during sewage treatment in Imhoff tank is___________________?

B. CH4
C. CO2
D. H2

Brown spots in fabrics will be caused by washing with water containing large amount of___________________?

A. Iron
B. Iodine
C. Zinc
D. Bromine

Which of the following gases is having the widest explosion limit (about 2 to 81% gas in gasair mixture), rendering it the property of the most explosive gas ?

A. Carbon monoxide
B. Acetylene
C. Hydrogen
D. Ammonia

Maximum permissible limit of mercury in human blood is ______________ micrograms/100 c.c?

A. 19
B. 7
C. 1
D. 82

Soluble silica present in boiler feed water can be removed by______________________?

A. Filtration
B. Coagulation
C. Anion exchanger
D. Preheating it

Presence of carbon monoxide in atmosphere produced by decomposition of chlorophyll and haemoglobin breakdown of some animals, beyond TLV (>50 ppm) ?

A. Acts as a green house gas thereby raising earth’s temperature
B. Causes asphyxia
C. Enhances the green house effect
D. Causes increase in sea level

Fluorosis is caused due to the presence of excessive amount of ______________ in drinking water?

A. Lead
B. Mercury
C. Fluoride
D. Arsenic

A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of _____________ high above earth’s atmosphere, which absorbs it?

A. Carbon dioxide
B. Hydrogen
C. Ozone
D. None of these

Noise level inside a jet airliner in normal flight is about ______________ decibels?

A. 125
B. 100
C. 80
D. 150

Thermodynamics Mcqs

Aerosols present in atmospheric air may be__________________?

A. Negatively charged
B. Positively charged
C. Neutral
D. Combination of all A., B. & C.

Fresh domestic sewage is _______________ in color?

A. Grey
B. Red
C. Dark brown
D. Black

Polyvinyl chloride containers are not suitable for storing_________________?

A. Foodstuffs
B. Metallic powder
C. Woolen clothes
D. None of these

The resistance of water to the passage of light through it is a measure of the___________________?

A. Turbidity
B. Hardness
C. Color
D. Dissolved gases

Carcinogenic air pollutants cause__________________?

A. Anemia
B. Cancer
C. Asphyxiation (suffocation)
D. Bone decay

The destruction of water-borne pathogens is termed as disinfection of water. Which of the following is a water disinfectant ?

A. Chlorine
B. Benzene hexachloride
C. Alkalis
D. Alkyl benzene sulphonate (ABS)

The lowest layer of atmosphere is known as the_____________________?

A. Ionosphere
B. Troposphere
C. Stratosphere
D. None of these

Inhalation of silica dust by human being causes ___________________?

A. Asphyxiation
B. Tuberculosis
C. Shortness of breath
D. Both B. & C.

Photochemical smog is formed from automobile exhaust ________________?

A. By reaction of hydrocarbon & nitric oxide in presence of sunlight
B. Is harmful for crops and trees also besides causing eye irritation & asthma
C. Appears only on sunny days
D. All A., B. & C.

Which of the following is not a source of ozone emission in the atmosphere?

A. Refrigerators
B. High voltage electrical equipments
C. Dermatological photo-therapy equipments
D. Xerox machines

Ringelmann chart is used for the evaluation of _____________ pollution?

A. Air
B. Noise
C. Water
D. Radioactive

Inorganic impurities causing water pollution is ____________________?

A. Carbohydrates
B. Fats
C. Salts of metals
D. Protein

In a sedimentation tank, the detention period for water ranges from _____________ hours?

A. 2 to 4
B. 16 to 20
C. 8 to 12
D. 24 to 32

Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundries causes___________________?

A. Asphyxiation (suffocation)
B. Tuberculosis
C. Shortness of breath
D. All A., B. and C.

Maximum permissible residual chlorine in treated water should be ____________ mg/litre?

A. 2 to 3
B. 0.2 to 0.3
C. 0.001 to 0.01
D. 5 to 10

The maximum permissible noise level to which a man working in a chemical plant can be exposed for eight hours per day is about ____________ decibels?

A. 105
B. 90
C. 60
D. 120

A masonry structure built below ground level, where biochemical reaction takes place due to anaerobic bacteria is called___________________?

A. Lagoon
B. Cesspool
C. Skimming mill
D. Septic tank

Water filtration rate in a slow sand filter ranges from ____________ litres/m2/hr?

A. 1500 to 2500
B. 100 to 200
C. 10 to 20
D. 4000 to 5000

Color test of water is done with an instrument called__________________?

A. Tintometer
B. Turbidimeter
C. Electro-chemical cell
D. Colorimeter

The maximum CO2 is emitted into the atmosphere by_________________?

A. Combustion
B. Trees
C. Biomass burning
D. Urea

Chemical Process Mcqs

Which of the following processes is involved in the biochemical treatment of sewage effluents ?

A. Oxidation
B. Dehydration
C. Reduction
D. Fermentation

The earth’s atmosphere is an envelope of gases present upto a height of about ______________ kms?

A. 1000
B. 200
C. 10
D. 2000

TLV of NO2 & NO exposure for the human being is 5 & 25 ppm respectively. Prolonged exposure of human being to NO2 causes_________________?

A. Bone disease
B. Bronchitis
C. Skin disorder
D. Cancer

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_________________?

A. Stratosphere
B. Troposphere
C. Ionosphere
D. None of these

The progressive warming up of the earth’s surface is mainly due to the___________________?

A. De-forestation
B. Blanketing effect of CO2 in the atmosphere
C. Automobile exhaust
D. Thickening of ozone layer

Hydrogen ion concentration in distilled water is___________________?

A. 10-7
B. 107
C. 7 × 10-7
D. 7 × 107

Infective bacteria in water is killed by the _____________ process?

A. Sterilisation
B. Disinfection
C. Aeration
D. None of these

Ozone is__________________?

A. A primary pollutant
B. Impervious to ultra-violet rays
C. A secondary pollutant
D. Both B. and C.

Which of the following is a secondary air pollutant ?

A. Photochemical smog
B. Nitrogen dioxide
C. Sulphur dioxide
D. Dust particles

Presence of nitrogen and phosphorous in waste water discharged into lakes and ponds causes_______________?

A. Odour nuisances
B. Foaming
C. Undesirable plant growth
D. Turbidity

TLV of lead for public sewer/waste water is about ______________ ppm?

A. 1
B. 150
C. 25
D. 650

Major sources of noise in furnace operation arises from air inspirators, combustion, side wall vibrations and fluctuation in the process heat load. A 50% increase in fuel firing rate may increase the furnace noise level by about ____________ decibels?

A. 3
B. 7
C. 30
D. 70

Lagoons used for purification of polluted water_______________?

A. Use micro-organisms/bacteria in presence of dissolved oxygen
B. Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds
C. Gives an excellent final effluent (with 3 to 4 lagoons arranged in series) having suspended solid < 1 mg/litre and BOD = 3.8 mg/litre
D. All A., B. & C.

5-200 μm size particles are called__________________?

A. Colloids or aerosols
B. Dust
C. Powder
D. Smoke

A man exposed to excessive noise level in the working environment may suffer from____________________?

A. Rupture of ear drum
B. Hearing loss
C. Nervousness & fatigue
D. All A., B. & C.

Which is the most widely used coagulant for the treatment of turbid water ?

A. Alum (aluminium sulphate)
B. Sodium aluminate
C. Ferric chloride
D. Lime

Higher concentration of nitrogen dioxide in atmospheric air causes___________________?

A. Asphyxiation
B. Bronchitis
C. Cancer
D. Corrosion

Exposure to SO2 containing chimney gases results in the__________________?

A. Acceleration of corrosion rates of metals
B. Reduction in strength of leather & cloth
C. Increased drying & hardening time of paints
D. All A., B. and C.

In sewage treatment, the detention period allowed for oxidation ponds ranges from _____________ weeks?

A. 9 to 10
B. 4 to 5
C. 1 to 2
D. 15 to 20

Insufficient washing of sand grains in a rapid sand filter causes__________________?

A. Shrinkage of filtering media
B. Air binding
C. Mud balls
D. Expansion of filtering media

Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes_________________?

A. Nervous depression
B. Paralysis of muscles & loss of appetite
C. Gastritis and diarrhea
D. All A., B. and C.

Phenolic water generated in coke ovens & by-product plant of a steel plant are disposed off by_________________?

A. Quenching of hot coke
B. Filtration and recycling for cooling coke oven gas
C. Discharging in the river stream
D. None of these

During sewage treatment, the sewage is subjected to ______________ treatment in Imhoff tank?

A. Filtration
B. Sedimentation
C. Digestion
D. Both B. and C.

Which of the following pollutants is absent in the emissions from a fertiliser plant ?

A. SO2 & SO3
B. NH3
C. NO2

The biological decomposition of organic substances in wastes controlled conditions is called_________________?

A. Biological oxidation
B. Incineration
C. Composting
D. None of these

Which of the following sources is responsible for maximum air pollution ?

A. Forest fire
B. Industrial chimney exhaust
C. Automobiles exhaust
D. Photochemical oxidation of organic matter

Water filtration rate in a rapid sand filter ranges from ______________ kilolitres/m2/hr?

A. 10 to 15
B. 3 to 6
C. 0.1 to 1
D. 15 to 20

Chemical Environmental Engineering Mcqs

Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the_______________?

A. Rain
B. Forestation
C. Green house effect
D. Vegetation

Sooty and sulphurous smog formed due to combustion of fossil fuels particularly in winter, continues throughout the day and night. When the moist atmospheric air’s water vapor condenses on the solid particles of smoke thereby forming smog (smoke + fog), it causes_________________?

A. Irritation in eyes
B. Poor visibility due to sky darkening
C. Respiratory trouble
D. All A., B. and C.

Hazardous/polluting chemical industries should have an ‘exclusion zone’ with a green belt and general public access prohibited around it, covering a radius of _____________ metres?

A. 400
B. 1000
C. 100
D. 4000

The most commonly used chemical coagulant in water treatment is________________?

A. Lime
B. Alum
C. Ferrous sulphate
D. Hydrazine

Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream ?

A. Circular clarifier
B. Sedimentation tank
C. Mechanical flocculation
D. Chemical coagulation

TLV of ammonia, nitrogen dioxide and phenol vapor in air is ______________ ppm ?

A. 5
B. 1000
C. 100
D. 2000

Nitrogen oxides (NOx) is not produced in the ______________ industry?

A. Nitrogenous fertiliser
B. Nitric acid making
C. Detergent
D. Any of these

What are the methods of treatment & disposal of radioactive wastes ?

A. Fixing into a solid mass with cement and sinking deep in the sea
B. Biological methods & adsorption in ion exchange materials
C. Evaporation & chemical precipitation
D. All A., B. & C.

In sewage treatment, its sedimentation is speeded up by commonly adding__________________?

A. Copper sulphate
B. Lime
C. Hydrochloric acid
D. Sodium sulphate

Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of _____________ present in it?

A. Ortho-xylene
B. Potassium cyanide
C. Coal ash
D. None of these

Main pollutants released from petroleum refineries is__________________?

A. CO, SO2 & H2S
B. CO2, H2S & NO2
C. CO2, NO & SO3
D. SO3, NO2 & CO2

Up To Date Chemical Environmental Engineering MCQs – Competitive New Chemical Engineering MCQs

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