MCQOPTIONS
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MCQOPTIONS
This section includes 428 Mcqs, each offering curated multiple-choice questions to sharpen your Power Systems knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Coal based thermal power station pollute the atmosphere by adding _______. |
| A. | NOx and SO2 |
| B. | NOx, SO2 and SPM |
| C. | NOx, SPM and CO |
| D. | NOx, SO2, SPM and CO |
| Answer» E. | |
| 2. |
Fanning type of plume behaviour takes place when |
| A. | Super adiabatic lapse rate prevails with light to moderate wind speed |
| B. | Extreme inversion conditions exist in the presence of light wind |
| C. | There exists a strong super-adiabatic lapse rate above a surface of inversion |
| D. | Plume is caught between two inversion layers |
| Answer» C. There exists a strong super-adiabatic lapse rate above a surface of inversion | |
| 3. |
Carbon monoxide in air affects |
| A. | heart |
| B. | skin |
| C. | eye |
| D. | hair |
| Answer» B. skin | |
| 4. |
EIS is acronym of |
| A. | Efficient Import Strategy |
| B. | Environmentally Important Strategy |
| C. | Energy Impact Statement |
| D. | Environmental Impact Statement |
| Answer» E. | |
| 5. |
Electrostatic Precipitators are devices for |
| A. | Particulate Emission Control |
| B. | Water Pollution Control |
| C. | Noise Pollution Control |
| D. | Energy Pollution Control |
| Answer» B. Water Pollution Control | |
| 6. |
A radiation dose of 5000 roentgens is likely to result _____. |
| A. | Almost immediate incapacitation |
| B. | Change in blood colour |
| C. | fever |
| D. | Vomiting |
| Answer» B. Change in blood colour | |
| 7. |
Choose the odd-one out from the following noise pollution control means |
| A. | Providing sound proof chambers/coatings for noisy sources |
| B. | Use of ear plugs |
| C. | Lubrication and maintenance of machinery |
| D. | Providing rubber / neoprene pads at the machine foundations |
| Answer» C. Lubrication and maintenance of machinery | |
| 8. |
From among the different pollutants listed that cause air pollution, identify the secondary air pollutant. |
| A. | Sulphuric acid (H2SO4) |
| B. | Oxides of Nitrogen (NO) |
| C. | Sulphur dioxide (SO2) |
| D. | Suspended particular matter (SPM) |
| Answer» B. Oxides of Nitrogen (NO) | |
| 9. |
Arrange the following Greenhouse gases in the increasing order of their Global Warming Potential: |
| A. | Methane < Nitrous Oxide < Hydrochloroflurocarbon-22 < Sulphur hexafluoride |
| B. | Nitrous Oxide < Methane < Hydrochloroflurocarbon-22 < Sulphur hexafluoride |
| C. | Methane < Nitrous Oxide < Sulphur hexafluoride < Hydrochloroflurocarbon-22 |
| D. | Methane < Hydrochloroflurocarbon-22 < Nitrous Oxide < Sulphur hexafluoride |
| Answer» B. Nitrous Oxide < Methane < Hydrochloroflurocarbon-22 < Sulphur hexafluoride | |
| 10. |
Identify the incorrect statement/option: The ill-effect of depletion of the ozone layer is |
| A. | skin melanoma |
| B. | damage to the immune system |
| C. | eye ailment such as cataract |
| D. | to make the aquatic ecosystem sterile |
| Answer» E. | |
| 11. |
In public halls and auditoriums, the sound persists even after the source of sound has ceased. This persistence of sound is called |
| A. | Absorption |
| B. | Echoes |
| C. | Reverberation |
| D. | Reflection of sound |
| Answer» D. Reflection of sound | |
| 12. |
Following are the 4 scenarios given relating the Environmental Lapse Rate (ELR) and Dry Adiabatic Lapse Rate (DALR). In which of the case, the mixing height would be the maximum. |
| A. | ELR >> DALR |
| B. | ELR = DALR |
| C. | ELR << DALR |
| D. | ELR = 0.75*DALR |
| Answer» B. ELR = DALR | |
| 13. |
Identify the incorrect statement/option:The psychological effect of noise pollution is ____ |
| A. | Insomnia as a result of lack of undisturbed and refreshing sleep |
| B. | emotional disturbance |
| C. | decrease in heart output and pain in heart |
| D. | depression and fatigue |
| Answer» D. depression and fatigue | |
| 14. |
An area comprising not less than __________ metres around hospitals, educational institutions and courts may be declared as silence area / zone. |
| A. | 50 |
| B. | 100 |
| C. | 250 |
| D. | 500 |
| Answer» C. 250 | |
| 15. |
Carbon monoxide is considered as most poisonous gas in Urban areas because: |
| A. | It causes loss of sense of smell |
| B. | It is carcinogenic in nature |
| C. | It reduces oxygen carrying capacity of blood |
| D. | It may cause conjunctivitis |
| Answer» D. It may cause conjunctivitis | |
| 16. |
________ Standard provides tool for program to quantify, monitor and verify greenhouse gas emission. |
| A. | ISO 14024 |
| B. | ISO 14015 |
| C. | ISO 14064 |
| D. | ISO 14060 |
| Answer» D. ISO 14060 | |
| 17. |
In a condition when Environmental Lapse Rate (ELR) > > Dry Adiabatic Lapse Rate (DALR), which of the following plume behavior would be observed |
| A. | Looping |
| B. | Farming |
| C. | Conning |
| D. | Lofting |
| Answer» B. Farming | |
| 18. |
Ambient Air Quality at the landfill site shall meet the standards prescribed by Central Pollution Control Board for: |
| A. | Residential Area |
| B. | Industrial Area |
| C. | Commercial Area |
| D. | Ecologically sensitive area |
| Answer» C. Commercial Area | |
| 19. |
Elevation and temperature data for a place are tabulated below:Elevation, mTemperature, °C 421.2544415.70 Based on the above data, lapse rate can be referred as: |
| A. | Super-adiabatic |
| B. | Neutral |
| C. | Sub-adiabatic |
| D. | Inversion |
| Answer» B. Neutral | |
| 20. |
Electrostatic precipitators are used as pollution control device for the separation of: |
| A. | SO2 |
| B. | NOx |
| C. | Particulate matter |
| D. | None of the above |
| Answer» D. None of the above | |
| 21. |
Consider the relevance of the following features for causing photochemical smog:1. Air stagnation.2. Abundant sunlight3. High concentration of NOx in atmosphere.4. High concentration of SO2 in atmosphere.Which of the above features are correct? |
| A. | 1, 2 and 4 only |
| B. | 3 and 4 only |
| C. | 1, 2 and 3 only |
| D. | 1, 2, 3 and 4 |
| Answer» E. | |
| 22. |
A gas contains two types of suspended particles having average sizes of 2 μm and 50 μm. Amongst the options given below, the most suitable pollution control strategy for removal of these particle is |
| A. | setting chamber followed by bag filter |
| B. | electrostatic precipitator followed by venturi scrubber |
| C. | electrostatic precipitator followed by cyclonic separator |
| D. | bag filter followed by electrostatic precipitator |
| Answer» B. electrostatic precipitator followed by venturi scrubber | |
| 23. |
A thermal power plant burns coal at the rate of 8 t/h. The coal has sulphur content of 4.5%. The rate of emission of SO2 will be |
| A. | 180 g/s |
| B. | 200 g/s |
| C. | 220 g/s |
| D. | 240 g/s |
| Answer» C. 220 g/s | |
| 24. |
Anthropogenic emission of chlorofluorocarbons (CFCs) is likely to deplete the ozone layer in troposphere leading to increase on earth surface |
| A. | Radioactivity |
| B. | Air temperature |
| C. | Ultraviolate radiation |
| D. | Acid rain |
| Answer» D. Acid rain | |
| 25. |
Identify from the following, energy source/s which is / are not renewable(i) Biomass energy(ii) Geo-thermal energy(iii) Wind energy(iv) Tidal and wave energy(v) Natural gas |
| A. | (i) only |
| B. | (i) and (v) only |
| C. | (v) only |
| D. | (i) and (iv) |
| Answer» D. (i) and (iv) | |
| 26. |
Consider the given statements with respect to the Environment Protection Act, 1986?a. This Act empowers the Union Government to make rules providing standards in regard to which environment pollutants shall NOT be discharged or emitted in the environment in excess.b. This Act empowers the Union Government to take direct action against defaulters.Select the correct statement/s. |
| A. | Both the statements are true |
| B. | Statement 1 is false and Statement 2 is true |
| C. | Statement 1 is true and statement 2 is false |
| D. | Both the statements are false |
| Answer» B. Statement 1 is false and Statement 2 is true | |
| 27. |
Consider the following statements with reference to bioenergy as a renewable energy source:1. Plants ensure a continuous supply of gas due to their continuous growth2. Cost of obtaining energy from biogas is less than that from fossil fuels3. Digestion of sludge may produce H2S and NOx which am injurious to human health4. ‘Floating dome’ installation is the preferred option as it supplies gas at constant pressure irrespective of the quantity of gas producedWhich of the above statements are correct? |
| A. | 1, 2 and 3 only |
| B. | 1, 2 and 4 only |
| C. | 2, 3 and 4 only |
| D. | I, 3 and 4 only |
| Answer» C. 2, 3 and 4 only | |
| 28. |
Consider the following air pollutants:1. NOX (oxides of nitrogen)2. PAN (Peroxyacytyl nitrate)3. CO2 (Carbon dioxide)4. CO (Carbon monoxide)Which of the given air pollutants is/are present in an automobile exhaust gas? |
| A. | 1, 3 and 4 |
| B. | 1 and 2 |
| C. | 1 only |
| D. | 2 and 3 |
| Answer» B. 1 and 2 | |
| 29. |
According the National Ambient Air Quality Standards (NAAQS), the permissible limit (daily average) for RSPM in Residential areas is |
| A. | 40 µg/m3 |
| B. | 60 µg/m3 |
| C. | 100 µg/m3 |
| D. | 120 µg/m3 |
| Answer» C. 100 µg/m3 | |
| 30. |
Consider the following statements related to noise:1. The range of sound power and sound pressures produced is from 0.0002 μ bars to 2000 μ bars.2. Human ears do not respond linearly to increase in sound pressures.3. Regular exposure to moderate noise makes the human ear more resistant to occasional exposures of high-intensity noise.Which of the above statements are correct? |
| A. | 1 and 2 only |
| B. | 1 and 3 only |
| C. | 2 and 3 only |
| D. | 1, 2 and 3 |
| Answer» B. 1 and 3 only | |
| 31. |
Physiological responses accompanying response and other noise exposures include:1. A vascular response characteristic by peripheral vasoconstriction, changes in heart beat rate and blood pressure.2. Various glandular charges such as increased output of adrenaline evidenced by chemical changes in blood.3. Slow, deep breathing |
| A. | 1 and 2 only |
| B. | 1 and 3 only |
| C. | 2 and 3 only |
| D. | 1, 2 and 3 |
| Answer» E. | |
| 32. |
A condition of sudden permanent aural damage resulting from an intense short-term exposure of noise is called |
| A. | acoustic trauma |
| B. | annoyance |
| C. | temporary threshold shift |
| D. | permanent threshold shift |
| Answer» B. annoyance | |
| 33. |
Consider the following statements regarding air pollution:1. The pollutant caused by incomplete combustion of organic matter is carbon monoxide.2. Depletion of ozone in outer atmosphere may trigger skin cancer.3. Acid rains are caused by SO2 and NOx.4. The permissible standard for SO2 in air for residential areas in India is 80 µg/m3.Which of the above statements are correct? |
| A. | 1, 2, 3 and 4 |
| B. | 1, 3 and 4 only |
| C. | 2 and 4 only |
| D. | 1, 2 and 3 only |
| Answer» B. 1, 3 and 4 only | |
| 34. |
In the figures, Group I represents the atmospheric temperature profiles (P, Q, Rand S), and Group II represents the dispersion of pollutants from a smokestack (1, 2, 3, and 4). In the figures of Group I, the dashed line represents the dry adiabatic lapse rate, whereas the horizontal axis represents temperature and the vertical axis represents the altitude.The correct match is |
| A. | P-1, Q-2, R-3, S-4 |
| B. | P-1, Q-2, R-4, S-3 |
| C. | P-1, Q-4, R-3, S-2 |
| D. | P-3, Q-1, R-2, S-4 |
| Answer» B. P-1, Q-2, R-4, S-3 | |
| 35. |
Aerodynamic diameter is the diameter of a sphere of unit density (1 g / cc) that has the same |
| A. | Terminal settling velocity |
| B. | Terminal viscosity |
| C. | Gravimetric effect |
| D. | Coefficient of thermal expansion |
| Answer» B. Terminal viscosity | |
| 36. |
Consider the following statements: A. Hydrofluorocarbons are organic compounds containing hydrogen, carbon, and fluorine. B. They are commonly used as substitutes for ozone-depleting substances like chlorofluorocarbons (CFCs) and are used in refrigerators and air-conditioners. C. They also don’t cause global warming. Which of the above statements are correct? Select the code for the correct answer from the options given below: |
| A. | A and B only |
| B. | B and C only |
| C. | A and C only |
| D. | A, B and C |
| Answer» B. B and C only | |
| 37. |
As per Noise pollution (Regulation and Control) Rules 2000 of India, the day time noise limit for a residential zone expressed in dB (A) Leq is |
| A. | 55 |
| B. | 65 |
| C. | 75 |
| D. | 85 |
| Answer» B. 65 | |
| 38. |
Consider the following statements related to ozone:1. Tropospheric ozone is harmful2. Stratospheric ozone is beneficial3. During prevalence smog, O3 is formedWhich of the above statements are correct? |
| A. | 1, 2 and 3 |
| B. | 1 and 2 only |
| C. | 1 and 3 only |
| D. | 2 and 3 only |
| Answer» B. 1 and 2 only | |
| 39. |
Choose the odd-one out from the following, in context with sinusoidal sound wave between sound pressure and time |
| A. | Amplitude |
| B. | Wavelength |
| C. | Period |
| D. | Frequency |
| Answer» C. Period | |
| 40. |
Consider the following statements in respect of the troposphere:1) The gaseous content constantly churns by turbulence and mixing2) Its behavior makes the weather3) The ultimate energy source for producing any weather change is the sun4) The height of the troposphere is nearly 11 km at the equatorial belt and is 5 km at the polesWhich of these are true of the troposphere? |
| A. | 1, 2 and 3 only |
| B. | 1, 2 and 4 only |
| C. | 1, 3 and 4 only |
| D. | 2, 3 and 4 only |
| Answer» B. 1, 2 and 4 only | |
| 41. |
Aerosols are defined as |
| A. | finely divided liquid droplets or solid particle capable of remaining suspended in air |
| B. | Toxic gases |
| C. | Solid particles |
| D. | non-toxic gagss |
| E. | finely divide liquid droplets only |
| Answer» B. Toxic gases | |
| 42. |
Central Pollution Control Board recently labelled which five chemicals as toxic in the manufacturing of crackers and thereby prohibited their respective use? |
| A. | Antimony, Lithium, Mercury, Arsenic and Lead |
| B. | Antimony, Lithium, Chromium, Lead and Nickel |
| C. | Cadmium, Lead, Nickel, Zinc and Iron |
| D. | Beryllium, Cadmium, Mercury, Chromium and Nickel |
| Answer» B. Antimony, Lithium, Chromium, Lead and Nickel | |
| 43. |
One of the following is not the effect of climate change |
| A. | Increase in global temperature |
| B. | Change in rainfall pattern leading to heavy floods and draughts |
| C. | Ozone layer depletion |
| D. | Loss of biodiversity |
| Answer» D. Loss of biodiversity | |
| 44. |
Electrostatic precipitators are used for removal of:1. Gaseous contaminants2. Liquid contaminants3. Particulate contaminants |
| A. | 1 only |
| B. | 2 only |
| C. | 3 only |
| D. | 1, 2 and 3 |
| Answer» D. 1, 2 and 3 | |
| 45. |
For a residential area, the permissible Leq (time weighted average of the level of sound in decibels on scale A during the night time) is |
| A. | 35 |
| B. | 45 |
| C. | 55 |
| D. | 65 |
| Answer» C. 55 | |
| 46. |
One of the following industries is not necessary to prepare the Environmental Impact Assessment (EIA) report to get clearance from the Ministry of Environment and Forest: |
| A. | Thermal projects |
| B. | Nuclear projects |
| C. | Hydro projects |
| D. | Industry involving investment less than < 5 crores |
| Answer» E. | |
| 47. |
Following observations have been made for the elevation and temperature to ascertain the stability of the atmosphere.Elevation (in m)Temperature (in °C)1015.56015.013014.3The atmosphere is classified as |
| A. | Stable |
| B. | Unstable |
| C. | Neutral |
| D. | Inverse |
| Answer» C. Neutral | |
| 48. |
As per the Noise Pollution (Regulation and Control) Amendment Rules, 2017, the State Government may permit use of loud speakers or public address systems and the like during night hours (between 10.00 p.m. and 12.00 midnight) on or during any cultural, religious or festive occasion of a limited duration not exceeding _________ days in all during a calendar year |
| A. | 10 |
| B. | 15 |
| C. | 20 |
| D. | 25 |
| Answer» C. 20 | |
| 49. |
A source emitting 80 dB and another emitting 60 dB if put in the same location will produce a noise of |
| A. | 140 dB |
| B. | 80 dB |
| C. | 20 dB |
| D. | 60 dB |
| Answer» C. 20 dB | |
| 50. |
Acid rain is caused by presence of which of the following gases in the atmosphere |
| A. | Nitrogen and oxygen |
| B. | Sulphur dioxide and Nitrogen oxide |
| C. | Carbon dioxide and Carbon-mono-oxide |
| D. | Ozone and argon |
| Answer» C. Carbon dioxide and Carbon-mono-oxide | |