MCQOPTIONS
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MCQOPTIONS
This section includes 227 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
Carcinogenic air pollutants cause__________________? |
| A. | Bone decay |
| B. | Cancer |
| C. | Asphyxiation (suffocation) |
| D. | Anemia |
| Answer» C. Asphyxiation (suffocation) | |
| 202. |
Carbonaceous particles having size less than 1 μm are called___________________? |
| A. | Grit |
| B. | Aggregates |
| C. | Aerosols |
| D. | Smoke |
| Answer» E. | |
| 203. |
Carbon monoxide is a pollutant, which causes_________________? |
| A. | Respiratory disease (e.g. asthma) |
| B. | Asphyxiation (suffocation) leading to death |
| C. | Retardation in crop growth |
| D. | Damage to building materials like marble |
| Answer» C. Retardation in crop growth | |
| 204. |
______________ cannot control the noise pollution ? |
| A. | Use of silencers |
| B. | Green house gases |
| C. | Vibration damping |
| D. | Tree plantation |
| Answer» C. Vibration damping | |
| 205. |
Brown spots in fabrics will be caused by washing with water containing large amount of___________________? |
| A. | Iron |
| B. | Zinc |
| C. | Iodine |
| D. | Bromine |
| Answer» B. Zinc | |
| 206. |
BOD of raw municipal sewage may be in the range of about _____________ mg/litre? |
| A. | 1-2 |
| B. | 5-10 |
| C. | 150-300 |
| D. | 2000-3000 |
| Answer» D. 2000-3000 | |
| 207. |
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. | Large quantity of excess combustion air |
| C. | Hydrocarbon fuel |
| D. | Pulverised coal as fuel |
| Answer» B. Large quantity of excess combustion air | |
| 208. |
Biological oxidation ponds remove organic matters present in the polluted water by _______________? |
| A. | Using the activities of bacteria and other micro organisms |
| B. | Aerobic oxidation |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 209. |
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. |
| Answer» E. | |
| 210. |
Bacterial aerobic oxidation of polluted water in biological oxidation ponds is done to purify it. Presence of bacteria helps in____________________? |
| A. | Coagulation and flocculation of colloids |
| B. | Oxidation of carbonaceous matter to CO2 |
| C. | Nitrification or oxidation of ammonia derived from breakdown of nitrogenous organic matter to the nitrite and eventually to the nitrate |
| D. | All A., B. and C. |
| Answer» E. | |
| 211. |
Automobile exhaust is passed through two compartments catalytic converter employing platinum as catalyst for___________________? |
| A. | Conversion of CO into CO2 in the second compartment |
| B. | Conversion of NOx into N2 and NH3 in the first compartment |
| C. | Oxidation of unburnt hydrocarbon fuel in the second compartment |
| D. | All A., B. and C. |
| Answer» E. | |
| 212. |
Atmospheric pollution caused by the exhaust gas of supersonic transport air-crafts is mostly in the atmospheric region called________________? |
| A. | Thermosphere |
| B. | Stratosphere |
| C. | Troposphere |
| D. | Mesosphere |
| Answer» C. Troposphere | |
| 213. |
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. | 10 |
| B. | 90 |
| C. | 800 |
| D. | 750 |
| Answer» C. 800 | |
| 214. |
Arsenic pollutant is not generated in _______________ industries? |
| A. | Tanneries |
| B. | Glass & ceramic |
| C. | Beverages |
| D. | Any of these |
| Answer» D. Any of these | |
| 215. |
Aerosols present in atmospheric air may be__________________? |
| A. | Positively charged |
| B. | Negatively charged |
| C. | Neutral |
| D. | Combination of all A., B. & C. |
| Answer» E. | |
| 216. |
Aerobic biological oxidation ponds used for the purification of polluted water__________________? |
| A. | Destroys/removes pathogen from the sewage |
| B. | Is not very effective for non-biodegradable substances (e.g. ABS) containing effluents |
| C. | Destroys/removes pathogen much more effectively if the sewage is chlorinated |
| D. | All A., B. & C. |
| Answer» E. | |
| 217. |
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. | Reynold stresses |
| B. | Shear forces |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» D. Neither A. nor B. | |
| 218. |
Acute danger to human life (i.e. death) exists, if the concentration of CO2 in atmospheric air exceeds ______________ percent (by volume)? |
| A. | 1 |
| B. | 3 |
| C. | 7 |
| D. | 20 |
| Answer» E. | |
| 219. |
A standard test for determination of hardness in water is termed as ______________ test? |
| A. | EDTA |
| B. | Electometric |
| C. | Total count |
| D. | Presumptive |
| Answer» B. Electometric | |
| 220. |
A shallow pond in which the sewage is retained and biologically treated is called__________________? |
| A. | Oxidation |
| B. | Imhoff tank |
| C. | Lagoon |
| D. | Skimming tank |
| Answer» B. Imhoff tank | |
| 221. |
A masonry structure built below ground level, where biochemical reaction takes place due to anaerobic bacteria is called___________________? |
| A. | Cesspool |
| B. | Lagoon |
| C. | Skimming mill |
| D. | Septic tank |
| Answer» E. | |
| 222. |
A man exposed to excessive noise level in the working environment may suffer from____________________? |
| A. | Hearing loss |
| B. | Rupture of ear drum |
| C. | Nervousness & fatigue |
| D. | All A., B. & C. |
| Answer» E. | |
| 223. |
A gas is termed as non-toxic, if its maximum permissible concentration (TLV) ranges from ______________ ppm? |
| A. | 1000 to 2000 |
| B. | 3000 to 6000 |
| C. | 6000 to 9000 |
| D. | 10000 to 100000 |
| Answer» E. | |
| 224. |
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. | Hydrogen |
| B. | Carbon dioxide |
| C. | Ozone |
| D. | None of these |
| Answer» D. None of these | |
| 225. |
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. | Global warming |
| B. | Green house |
| C. | Atmospheric effect |
| D. | Ionosphere |
| Answer» C. Atmospheric effect | |
| 226. |
80% less than 200 mesh size particles are called____________________? |
| A. | Smoke |
| B. | Powder |
| C. | Grit |
| D. | Aggregates |
| Answer» C. Grit | |
| 227. |
5-200 μm size particles are called__________________? |
| A. | Colloids or aerosols |
| B. | Powder |
| C. | Dust |
| D. | Smoke |
| Answer» B. Powder | |