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.
| 251. |
What is an estimated damage caused by acid rain to buildings in USA ? |
| A. | 3 billion $ a Year |
| B. | 4 billion $ a Year |
| C. | 9 billion $ a Year |
| D. | 5 billion $ a Year |
| Answer» E. | |
| 252. |
When both, radiation and subsidence occurs at same time, process is known as |
| A. | Inversion |
| B. | Single Inversion |
| C. | Double inversion |
| D. | Subsidence |
| Answer» D. Subsidence | |
| 253. |
Fading of textile dyes and deterioration of natural and synthetic 'fibers' is caused by |
| A. | Sulfuric acid |
| B. | Nitrogen and oxygen |
| C. | Fluorine |
| D. | Argon |
| Answer» C. Fluorine | |
| 254. |
CO reacts with hemoglobin of blood and displaces O₂ to form |
| A. | COHb |
| B. | CO₂Hb |
| C. | H₂S |
| D. | Nox |
| Answer» B. CO₂Hb | |
| 255. |
What does smoke and water form ? |
| A. | Sulfur dioxide |
| B. | Sulphuric acid mist |
| C. | Nitrogen oxide |
| D. | Carbon dioxide |
| Answer» C. Nitrogen oxide | |
| 256. |
A small amount of 'ozone' can be produced from lightning and |
| A. | Dust particles |
| B. | Volcanic eruption |
| C. | Forest Fire |
| D. | evaporation Industries |
| Answer» D. evaporation Industries | |
| 257. |
Which source of air pollution has a large stationary source? |
| A. | Point Source |
| B. | Area Source |
| C. | Line Source |
| D. | Mobile Source |
| Answer» B. Area Source | |
| 258. |
Which gas is bluish in color and has pungent odor? |
| A. | CO₂ |
| B. | O₂ |
| C. | O₃ |
| D. | H₂S |
| Answer» D. H₂S | |
| 259. |
Which gas has a rotten egg odor? |
| A. | H₂S |
| B. | CO₂ |
| C. | CO |
| D. | SO₂ |
| Answer» B. CO₂ | |
| 260. |
During inversion, visibility is reduced and pollutant concentration is |
| A. | Minimized |
| B. | Maximized |
| C. | Reduced |
| D. | Decreased |
| Answer» C. Reduced | |
| 261. |
HCs are thermodynamically not stable towards |
| A. | Acidification |
| B. | Decomposition |
| C. | Reduction |
| D. | Oxidation |
| Answer» E. | |
| 262. |
CO₂ is a tasteless, colorless and |
| A. | Non-combustible gas |
| B. | Combustible gas |
| C. | Flammable Gas |
| D. | All of above |
| Answer» B. Combustible gas | |
| 263. |
Natural ozone in 'stratosphere' absorbs harmful |
| A. | Air pollution |
| B. | Ultraviolet Radiations |
| C. | Smoke |
| D. | Dust particles |
| Answer» C. Smoke | |
| 264. |
Pollutants in form of fine dust particles are known as |
| A. | Dry Deposits |
| B. | Wet Deposits |
| C. | Rain |
| D. | Snow |
| Answer» B. Wet Deposits | |
| 265. |
When ELR and ALR are equal, atmosphere is said to be |
| A. | Higher |
| B. | Super Adiabatic |
| C. | Lapse rate |
| D. | Neutral |
| Answer» E. | |
| 266. |
Smoke is formed by incomplete combustion of |
| A. | Inorganic particles |
| B. | Organic particles |
| C. | Dust particles |
| D. | Fumes |
| Answer» C. Dust particles | |
| 267. |
Simplest type of equipment used for collection of solid particles is known as |
| A. | Electrostatic Precipitator |
| B. | Settling chamber |
| C. | Filter rod machine |
| D. | Tangible tool |
| Answer» C. Filter rod machine | |
| 268. |
Which type of inversion is common in winter than summer? |
| A. | Frontal inversion |
| B. | Subsidence Inversion |
| C. | Radiation inversion |
| D. | Temperature inversion |
| Answer» D. Temperature inversion | |
| 269. |
What is the primary standard level for carbon monoxide for assuring air quality? |
| A. | 10ppm |
| B. | 90ppm |
| C. | 1ppm |
| D. | 9ppm |
| Answer» E. | |
| 270. |
'Trichlorethylene' is less reactive than |
| A. | Photochemical smog |
| B. | Olefins |
| C. | Ozone |
| D. | Carbon dioxide |
| Answer» C. Ozone | |
| 271. |
How long does an acid airborne form in atmosphere ? |
| A. | 6 to 7 days |
| B. | 2 to 5 days |
| C. | 1 to 2 days |
| D. | 5 to 6 days |
| Answer» C. 1 to 2 days | |
| 272. |
Which of these belongs to the category of criteria pollutants? |
| A. | Ozone |
| B. | Lead |
| C. | Carbon monoxide |
| D. | All of the mentioned |
| Answer» E. | |
| 273. |
What is the statement of the Kelvin effect in fluid droplets? |
| A. | Vapour pressure about a droplet decreases with decrease in diameter of the droplet |
| B. | Vapour pressure about a droplet increases with decrease in diameter of the droplet |
| C. | Vapour pressure of the droplet is independent of the diameter of the droplet |
| D. | Vapour pressure of the droplet varies with the diameter of the droplet as well as the temperature |
| Answer» C. Vapour pressure of the droplet is independent of the diameter of the droplet | |
| 274. |
What is the size range of atmospheric particulate matter? |
| A. | 0.1 – 10 microns |
| B. | 0.1 – 1 micron |
| C. | 1 – 10 microns |
| D. | 10 – 100 microns |
| Answer» B. 0.1 – 1 micron | |
| 275. |
How many types of inversion? |
| A. | 2 |
| B. | 4 |
| C. | 5 |
| D. | 3 |
| Answer» B. 4 | |
| 276. |
In some instance, plants and acid rain enhance soil fertility and improve |
| A. | Photosynthesis |
| B. | Crop Growth |
| C. | Transpiration |
| D. | Evaporation |
| Answer» C. Transpiration | |
| 277. |
Which gas is produced when an organic matter is burnt? |
| A. | Oxygen |
| B. | Carbon dioxide |
| C. | Methane |
| D. | argon |
| Answer» C. Methane | |
| 278. |
What are man-made sources of acid rain ? |
| A. | Exhaust from vehicles |
| B. | Burning fuels |
| C. | Isoprene emissions |
| D. | All of above |
| Answer» B. Burning fuels | |
| 279. |
Who discovered the phenomenon of acid rain? |
| A. | George Brown |
| B. | James T. Stewart |
| C. | Robert Angus Smith |
| D. | Charles David |
| Answer» D. Charles David | |
| 280. |
What does the term obliquity indicate? |
| A. | Earth’s axial tilt of 23.5 degrees |
| B. | Alignment of the Earth’s internal magnetic field |
| C. | Analysis of ocean currents |
| D. | Pressure variation over different seasons |
| Answer» B. Alignment of the Earth’s internal magnetic field | |
| 281. |
What is 'pH' of water? |
| A. | 2 |
| B. | 5 |
| C. | 7 |
| D. | 9 |
| Answer» D. 9 | |
| 282. |
When does plants usually close their stomata ? |
| A. | At night |
| B. | Day time |
| C. | In the morning |
| D. | In the evening |
| Answer» B. Day time | |
| 283. |
What is the size of the particles categorised as aerosols? |
| A. | Greater than 1 micron |
| B. | Less than 1 micron |
| C. | Between 0.01-1 micron |
| D. | Less than 0.01 micron |
| Answer» D. Less than 0.01 micron | |
| 284. |
How does atmospheric pressure vary with increase in altitude? |
| A. | It decreases linearly |
| B. | It decreases exponentially |
| C. | It increases linearly |
| D. | It increases till stratosphere and then starts decreasing exponentially |
| Answer» C. It increases linearly | |
| 285. |
Deterioration of leather and paper is caused by |
| A. | Sulphur dioxide |
| B. | APN |
| C. | PAN |
| D. | Lead |
| Answer» B. APN | |
| 286. |
Wet scrubbers are classified into ____ types. |
| A. | 2 |
| B. | 3 |
| C. | 5 |
| D. | 6 |
| Answer» C. 5 | |
| 287. |
The centrifugal collectors are classified into how many types? |
| A. | 3 |
| B. | 4 |
| C. | 5 |
| D. | 2 |
| Answer» E. | |
| 288. |
The minimum particle size removes by the gravitational chamber is ___________ |
| A. | >50μm |
| B. | >10μm |
| C. | >25μm |
| D. | >0.5μm |
| Answer» B. >10μm | |
| 289. |
Which of the following is incorrect regarding the fabric filter? |
| A. | They can remove very small particle |
| B. | They are liable to chemical attack |
| C. | They have low efficiency in comparison to venturi scrubber |
| D. | They can handle large volume of gas at relatively high speed |
| Answer» D. They can handle large volume of gas at relatively high speed | |
| 290. |
Which of the following fluid is used in web scrubbers? |
| A. | Lime |
| B. | MgSO₄ |
| C. | NaCl |
| D. | K₂Cr₂O₇ |
| Answer» B. MgSO₄ | |
| 291. |
Identify the correct statement regarding the Electrostatic precipitator. |
| A. | Minimum particle size removal is <0.5μm |
| B. | They can be operated at high temperature |
| C. | It has a low maintenance cost |
| D. | It does not cause any freezing problem |
| Answer» C. It has a low maintenance cost | |
| 292. |
Which of the following removes both gaseous and particulate contaminants? |
| A. | Venturi scrubber |
| B. | Gravitational settling chamber |
| C. | Dynamic precipitator |
| D. | Wet scrubber |
| Answer» B. Gravitational settling chamber | |
| 293. |
Which of the following air pollution control device has maximum efficiency? |
| A. | Electrostatic precipitator |
| B. | Dynamic precipitator |
| C. | Spray tower |
| D. | Wet cyclonic scrubber |
| Answer» B. Dynamic precipitator | |
| 294. |
When Environmental Lapse Rate (ELR) is greater than Adiabatic Lapse Rate (ALR), then which of the following occurs? |
| A. | Sub adiabatic lapse rate |
| B. | Super adiabatic lapse rate |
| C. | Neutral lapse rate |
| D. | Adiabatic lapse rate |
| Answer» C. Neutral lapse rate | |
| 295. |
The wet adiabatic rate is greater than the dry adiabatic rate. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 296. |
When environmental Lapse Rate (ELR) is less is than Adiabatic Lapse Rate (ALR), then which of the following occurs? |
| A. | Sub adiabatic lapse rate |
| B. | Super adiabatic lapse rate |
| C. | Neutral lapse rate |
| D. | Adiabatic lapse rate |
| Answer» B. Super adiabatic lapse rate | |
| 297. |
When environmental Lapse Rate (ELR) is equal to the Adiabatic Lapse Rate (ALR), then which of the following occurs? |
| A. | Sub adiabatic lapse rate |
| B. | Super adiabatic lapse rate |
| C. | Neutral lapse rate |
| D. | Adiabatic lapse rate |
| Answer» D. Adiabatic lapse rate | |
| 298. |
_______ occurs when atmospheric temperature increases with height. |
| A. | Negative lapse rate |
| B. | Super adiabatic lapse rate |
| C. | Neutral lapse rate |
| D. | Positive lapse rate |
| Answer» E. | |
| 299. |
Which of the following is a bulk phenomena? |
| A. | Physical adsorption |
| B. | Chemical adsorption |
| C. | Absorption |
| D. | Sorption |
| Answer» D. Sorption | |
| 300. |
Which of the following is not a part of adsorption unit? |
| A. | Packed towers |
| B. | Multiple fixed bed |
| C. | Fluidized bed |
| D. | Moving bed |
| Answer» B. Multiple fixed bed | |