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Chemical Engineering Mcqs 9594 MCQs [All-Courses]

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Chemical Engineering MCQs designed for job test and interview preparation, particularly for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover important topics such as the fundamentals of chemical engineering, chemical processes, chemical reactions, process control, and instrumentation, along with other key concepts in the field.

All Topics  9594

The type of bacteria which is active in trickling filter during biological treatment of sewage is the _____________ bacteria?
A Anaerobic
B Saprophytic
C Aerobic
D Parasitic
Correct Answer: Aerobic
Presence of _____________ hardness is responsible for the temporary hardness in water?
A Carbonate
B Calcium
C Chloride
D Sulphate
Correct Answer: Calcium
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 viscosity & density of the gas
C Proportional to the pressure of the gas
D Both B. and C.
Correct Answer: Both B. and C.
Limestone powder is injected during pulverised coal burning in boilers to ______________ the flue gases?
A Reduce SO2 content in
B Catalytically convert SO2 to SO3 in
C Increase the dew point of
D None of these
Correct Answer: Reduce SO2 content in
The main industrial source of emission of hydrogen sulphide air pollutant is________________?
A Petroleum refineries
B Coal based thermal power plants
C Pulp and paper plant
D Metallurgical roasting & smelting plant
Correct Answer: Coal based thermal power plants
Replenishment of dissolved oxygen in water stream polluted with industrial waste occurs by________________?
A Natural aeration of water stream
B Photosynthetic action of algae
C Both A. & B.
D Neither A. nor B.
Correct Answer: Both A. & B.
Thermal pollution due to excessive heat & temperature in the working place causes__________________?
A Reduction in working efficiency of manpower
B Fatigue
C High breathing rate
D All A., B. & C.
Correct Answer: All A., B. & C.
Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in___________________?
A Food industry
B Municipal sewage treatment
C Petroleum refinery
D Iron & steel plant
Correct Answer: Food industry
Inhalation of lead compounds present in the automobile exhausts (using leaded petrol) causes________________?
A Blood poisoning
B Anaemia
C Nervous system disorder
D All A., B. and C.
Correct Answer: All A., B. and C.
Pick out the one which is not a chemical coagulant ?
A Aluminium sulphate
B Ferrous sulphate
C Hydrated lime
D Chloramine
Correct Answer: Chloramine
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