Competetive Latest Chemical Engineering MCQs – New Chemical Environmental Engineering MCQs

Competetive Latest Chemical Engineering MCQs – New 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

By practicing these MCQs of Chemical Environmental Engineering MCQs – Latest Competitive Chemical Engineering MCQs , an individual for exams performs better than before. This post comprising of mechanical engineering objective questions and answers related to Chemical Environmental Engineering Mcqs “. As wise people believe “Perfect Practice make a Man Perfect”. It is therefore practice these mcqs of mechanical engineering to approach the success. Tab this page to check “Chemical Environmental Engineering Mcqs” for the preparation of competitive mcqs, FPSC mcqs, PPSC mcqs, SPSC mcqs, KPPSC mcqs, AJKPSC mcqs, BPSC mcqs, NTS mcqs, PTS mcqs, OTS mcqs, Atomic Energy mcqs, Pak Army mcqs, Pak Navy mcqs, CTS mcqs, ETEA mcqs and others.

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:

There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant ?

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

On prolonged exposure to high concentration of carbon monoxide (> 5000 ppm), man dies because __________________?

A. Of jamming of respiratory tract
B. Of clotting of blood
C. It forms carboxyhemoglobin by combining with haemoglobin of blood, thereby making it
incapable of absorbing oxygen

D. It forms CO2 by combining with oxygen present in the blood

In water treatment plant, zeolite process is used to remove the _____________ of water?

A. Alkalinity
B. Acidity
C. Hardness
D. Iron & zinc

Disinfection of water is done to remove ______________________?

A. Bad taste
B. Color
C. Foul odour
D. Bacteria

Noise level audible to audience sitting in the 5th row from the stage during a large orchestra show corresponds to about _______________ decibels?

A. 160
B. 135
C. 105
D. 185

The average thickness of ozone layer in stratosphere is about _______________ dobson unit (DU)?

A. 750
B. 230
C. 20
D. 1500

CFC (chloro fluoro carbon) is very highly reactive in causing depletion of ozone layer in the atmosphere. Each atom of chlorine liberated from CFC is capable of decomposing ________________ molecules of ozone?

A. 109
B. 105
C. 102
D. 1015

The upper layer of atmosphere is called the ____________________?

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

The term Biological Oxygen Demand (BOD) is used in relation to ______________________?

A. Cooling water
B. Potable water
C. Distilled water
D. Industrial effluents

Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate ?

A. CO
B. NOx
C. SO2
D. CFC (chloro fluoro carbons)

For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than ______________ ppm?

A. 500
B. 5
C. 10000
D. 1000

Process Control And Instrumentation Mcqs

Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in ‘gas chamber’ is about ______________ ppm?

A. < 1
B. 10-100
C. 100-1000
D. 100-200

Smog is ______________________?

A. A liquid particle resulting from vapor condensation
B. A combination of smoke and fog
C. Nothing but black smoke
D. A solid particle e.g. fly-ash

Noise pollution level in a chemical plant is expressed in __________________?

A. Hertz
B. Decibel
C. Roentgen
D. None of these

Which of the following is not a weightless pollutant ?

A. SPM
B. Radioactive rays
C. Thermal pollution
D. Noise pollution

Noise level in a quiet private business office is about _____________ decibels?

A. 70
B. 50
C. 25
D. 85

Which of the following fine dust removal equipments is the most efficient ?

A. Scrubber
B. Bag filter
C. Electrostatic precipitator
D. Cyclone separator

Maximum permissible concentration (i.e. TLV) of DDT in public water supply system is _______________ micro gram (μ g)/litre?

A. 332
B. 42
C. 22
D. 1050

From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about ________________ ppm?

A. 5
B. 500
C. 50
D. 5000

Fresh sewage is ______________ in nature?

A. Neutral
B. Acidic
C. Alkaline
D. Highly acidic

______________ is the process of killing organism in water ?

A. Sterilisation
B. Coagulation
C. Disinfection
D. Sedimentation

Salt content in sea water is about ______________ percent?

A. 1
B. 0.5
C. 3.5
D. 9.05

High noise levels produced during operation of fans and compressors can be reduced by using__________________?

A. Mufflers (silencers)
B. Lagging of noisy duct
C. Acoustic absorbent
D. None of these

Green house gases blanket/block the infrared radiation from earth’s surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect ?

A. H2
B. CO2
C. SO3
D. N2

Which of the following is an adsorbent for removal of nitrogen oxides from gas/air ?

A. Bog iron (iron oxide)
B. Silica gel
C. Active carbon
D. Pulverised limestone

The effect of increase in carbon dioxide level of the atmosphere and its profound effect on our climate is called the ________________?

A. Catalytic conversion
B. Global warming
C. Green house effect
D. Both B. and C.

Which of the following is not a practical method of low level radioactive waste disposal ?

A. Disposing off in rivers & oceans
B. Discharging to atmosphere through tall stacks after dilution
C. Dilution with inert material
D. Filling in steel crates and shooting it off out of earth’s gravity

Disinfection of water is done to destroy pathogenic bacteria and thus prevent water-borne diseases. Disinfection of water may be done by the use of_________________?

A. Chlorine or its compounds
B. Ozone and iodine
C. Ultraviolet light for irradiation of water
D. All A., B. & C.

Global warming may result in __________________?

A. Cyclone
B. Flood
C. Decrease in food productivity
D. All A., B. and C.

Ringelmann chart No. 2 corresponds to _______________ percent black smoke?

A. 20
B. 10
C. 40
D. 80

Thermodynamics Mcqs

Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by _____________________?

A. Chemical coagulation
B. Centrifugation
C. Floatation & skimming
D. Ultra filtration

______________ content of the phosphate rock is the pollutant of primary interest in a phosphatic fertiliser plant ?

A. Phosphorous
B. Fluorine
C. Calcium
D. Sulphur

The weakest sound that can be heard by a person in a quiet environment is equivalent to ____________ decibel ?

A. 1
B. 10
C. 5
D. 50

Workers working in _______________ industry are most prone to white lung cancer?

A. Limestone mining
B. Coal mining
C. Textile
D. Asbestos

Which of the following is a manmade source of air pollution ?

A. Automobile exhaust
B. Bacterial action in soil and swamp areas
C. Forest fire
D. All A., B. and C.

Which of the following is the most active zone of atmosphere in which weathering events like rain, storm & lightning occur ?

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

Lung cancer & DNA breakage are the major ill effects of excessive ozone exposure to human beings. Ozone layer depletion in the atmosphere is mainly caused by the presence of________________?

A. SO2
B. CO2
C. Hydrocarbons
D. CFC (chloro fluoro carbon)

The function of skimming tank in sewage treatment is to remove _____________ substances?

A. Suspended solid
B. Dissolved solid
C. Oil & fatty
D. Gritty & inorganic

A standard test for determination of hardness in water is termed as ______________ test?

A. EDTA
B. Total count
C. Electometric
D. Presumptive

Removal of ______________ results from the disinfection of water?

A. Odour
B. Turbidity
C. Hardness
D. Bacteria

Which of the following is not a natural source of air pollution ?

A. Biological decay of vegetable matter
B. Volcanic eruptions and lightening discharges
C. Photochemical oxidation of organic matter
D. None of these

Which of the following is the most widely used disinfectant in water treatment ?

A. Chlorine
B. Cation exchanger
C. Irradiation of water by ultraviolet light
D. Coagulation

There are five concentric layers within the atmosphere which is differentiated on the basis of temperature. The atmospheric layer which lies close to the earth’s surface in which human being along with other organisms live is called troposphere. The rate at which air temperature in the troposphere gradually decreases with height is about _____________ °C/km?

A. 1
B. 0.05
C. 6.5
D. 15

Threshold limit value (TLV) of CO in air is _____________ ppm?

A. 2000
B. 50
C. 5
D. 5000

Ethanolamine is an absorbent used for the removal of _____________ from air/gas?

A. HF
B. H2S
C. SO2
D. Both B. & C.

Pick out the wrong statement ?

A. The concentric layer in atmosphere which contains about 70% of the total mass of atmosphere and characterised by a steady decrease in temperature is called stratosphere
B. Troposphere is a turbulent dusty zone containing much of water vapor and clouds
C. Stratosphere is rich in ozone and is located just above the troposphere
D. The earth’s atmosphere is an envelope of gases extending upto a height of about 200 kms

Which is the most efficient dust removal equipment for removal of submicronic dust particles from blast furnace gas ?

A. Gravity settling chamber
B. Packed scrubber
C. Electrostatic precipitator
D. Hydrocyclone

Presence of nitrates in water in excess of 50 ppm causes________________?

A. Methemoglobinemia
B. Asphyxiation
C. Gastroenteritis
D. Tooth decay

Black smoke coming out of the chimney of a furnace is an indication of the use of ______________ in the furnace?

A. Low amount of excess combustion air
B. Hydrocarbon fuel
C. Large quantity of excess combustion air
D. Pulverised coal as fuel

Biological oxidation ponds remove organic matters present in the polluted water by _______________?

A. Aerobic oxidation
B. Using the activities of bacteria and other micro organisms
C. Both A. & B.
D. Neither A. nor B.

Which of the following plants does not emit appreciable amount of SO2 in atmosphere ?

A. Petroleum refinery
B. Thermal power plant
C. Nitric acid plant
D. Sulphuric acid plant

The pH value of potable water should be between____________________?

A. 13 to 14
B. 6.5 to 8
C. 1 to 1.5
D. 4 to 5

Which of the following causes death by asphyxiation, if its presence in atmospheric air exceeds maximum allowable concentration (i.e. > 50 ppm) ?

A. Peroxyacetyl nitrate
B. Benzopyrene
C. Carbon monoxide
D. Sulphur dioxide

Sulphur dioxide present in the industrial chimney exhaust gases causes____________________?

A. Corrosion of building materials
B. Reduction in plant’s productivity owing to acid rain
C. Respiratory & lung disease
D. All A., B. and C.

Corrosion in boilers can be prevented by _________________?

A. Enhancing pH of feed water by adding alkali
B. Deaeration of feed water
C. Feeding sodium sulphite or hydrazine phosphate to the boilers, which combines with oxygen and prevents corrosion
D. All A., B. and C.

Refractory Technology Mcqs

Fine grit present in sewage is removed in the _____________ during sewage treatment?

A. Trickling filter
B. Detritus tank
C. Grit chamber
D. Skimming tank

Out of the following, TLV of _______________ is maximum (about 500 ppm)?

A. Carbon dioxide
B. Carbon disulphide
C. Toluene
D. Acetaldehyde

Threshold limit value (TLV) means maximum permissible/acceptable concentration. TLV of phosgene in air is about ______________ ppm (parts per million)?

A. 1.2
B. 0.2
C. 0.002
D. 4.8

As per the world health organisation (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is _____________ μg/m3.(μg-microgram)?

A. 800
B. 90
C. 10
D. 750

Presence of _____________ bacteria in water causes disease like typhoid?

A. Anaerobic
B. Pathogenic
C. Aerobic
D. Non-pathogenic

In large thermal power stations very fine particulates present in flue gas are removed by___________________?

A. Bag filter
B. Wet scrubber
C. Electrostatic precipitators
D. Dust catcher

Which of the following is the most lethal water pollutant ?

A. Phenol and cyanide
B. Alkalis
C. Chlorine
D. Suspended solids

The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of _____________ of water?

A. Dissolved oxygen content
B. Vapor pressure
C. Biological oxygen demand
D. All A., B. and C.

Which of the following industries discharge mercury as a pollutant ?

A. Chloro-alkali industry
B. Beverage plant
C. Tanneries
D. Phosphoric acid plant

The Killer gas which caused Bhopal gas tragedy in 1984 was________________?

A. Carbon monoxide
B. Methyl isocyanate (MIC)
C. Phosgene
D. Sulphur dioxide

Permissible safe limit (TLV) of _____________ toxic gas is 100-1000 parts per million (ppm)?

A. Extremely
B. Moderately
C. Highly
D. Very extremely

The common pollutant generated in chlor-alkali industry and battery manufacture is ___________________?

A. Mercury
B. Phosphate
C. Brine
D. None of these

Deaeration of high pressure boiler feed water is done to reduce ___________________?

A. Its silica content
B. Its dissolved oxygen content
C. Foaming from boilers
D. Caustic embrittlement

Which of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters ?

A. Sr-90
B. I-131
C. Au-198
D. Ra-226

Beyond what concentration of H2S in air, acute danger to human life exists ?

A. 100 ppm
B. 50 ppm
C. 300 ppm
D. 700 ppm

Competetive Latest Chemical Engineering MCQs – New Chemical Environmental Engineering MCQs

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