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.
| 301. |
Which of the following catalyst is used for removing hydrocarbon from gaseous pollutant in combustion unit? |
| A. | Platinum |
| B. | Activated alumina |
| C. | Vanadium |
| D. | Potassium permanganate |
| Answer» C. Vanadium | |
| 302. |
Acid deposition damages leaves of birch and needles of: |
| A. | Grass |
| B. | Pine Tree |
| C. | Fruits Trees |
| D. | Vegetables |
| Answer» C. Fruits Trees | |
| 303. |
Which of the following is the absorption unit? |
| A. | Cyclone collector |
| B. | Plate tower |
| C. | Gravitation settling chamber |
| D. | Dynamic precipitator |
| Answer» C. Gravitation settling chamber | |
| 304. |
The velocity of air reduces to zero by the time it reaches the bronchi. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 305. |
Which of the following aerosols have the best absorbing properties? |
| A. | Carbon black |
| B. | Soot |
| C. | Elemental Carbon |
| D. | All of the mentioned |
| Answer» E. | |
| 306. |
What is natural sources of CO? |
| A. | solid waste disposal |
| B. | Volcanic eruption and forest fire |
| C. | Motor vehicles |
| D. | Fuel combustion |
| Answer» C. Motor vehicles | |
| 307. |
Which gas easily oxidize, paints, textile fibers and dyes? |
| A. | CO |
| B. | SO₂ |
| C. | O₃ |
| D. | NO₂ |
| Answer» D. NO₂ | |
| 308. |
Ocean is a source for carbon monoxide. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 309. |
How does increase in temperature affect air pollution? |
| A. | Higher temperatures reduce air pollution |
| B. | Higher temperatures increase air pollution |
| C. | Temperature does not affect the air pollution levels |
| D. | Humidity factor is also necessary to predict variance of air pollution with temperature |
| Answer» C. Temperature does not affect the air pollution levels | |
| 310. |
What is concentration of nitric oxide in air? |
| A. | 2ppm |
| B. | 1.0ppm |
| C. | 3ppm |
| D. | 4ppm |
| Answer» C. 3ppm | |
| 311. |
What are major sources of nitrogen oxide emissions ? |
| A. | Coal |
| B. | Oil |
| C. | Natural gas |
| D. | All of above |
| Answer» D. All of above | |
| 312. |
In norway, what factor is involved in removal of salmon ? |
| A. | Acid deposition |
| B. | Eutrophication |
| C. | Pollution |
| D. | Air Pollution |
| Answer» B. Eutrophication | |
| 313. |
The size of aerosol particles formed mechanically is minimum 1 micron. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 314. |
What range of air quality index has the most severe impact on human health? |
| A. | 101-200 |
| B. | 201-300 |
| C. | 301-400 |
| D. | 401-500 |
| Answer» E. | |
| 315. |
Formation of aerosols by nucleation produces particles of size __________ |
| A. | Less than 0.1 micron |
| B. | Greater than 0.1 micron |
| C. | Less than 1 micron |
| D. | Greater than 1 micron |
| Answer» B. Greater than 0.1 micron | |
| 316. |
When does radiation inversion usually occur ? |
| A. | Day time |
| B. | At night |
| C. | In the morning |
| D. | In the evening |
| Answer» C. In the morning | |
| 317. |
Acid deposited in rain and snow is known as |
| A. | Wet Deposition |
| B. | Dry Deposition |
| C. | Acid Rain |
| D. | Rain Depolarization |
| Answer» B. Dry Deposition | |
| 318. |
Which gas has adverse effects on human health ? |
| A. | Nitric Oxide |
| B. | Sulfuric acid |
| C. | Nitrodioxide |
| D. | Carbon dioxide |
| Answer» D. Carbon dioxide | |
| 319. |
In Europe and Scandinavia, 'PH' value of rain and snow is |
| A. | 2 to 4 |
| B. | 4 to 5 |
| C. | 3 to 5 |
| D. | 9 |
| Answer» D. 9 | |
| 320. |
Which of the following pollutants are considered when measuring air quality? |
| A. | CO, O₃, PM₂ꓸ₅ |
| B. | NH₃, PM₁₀, Pb |
| C. | NO₂, SO₂ |
| D. | All of the mentioned |
| Answer» E. | |
| 321. |
What does 'Aluminum' irritate ? |
| A. | Brook trout's gills |
| B. | Shark's gills |
| C. | Zooplankton's gills |
| D. | Phytoplankton's gills |
| Answer» B. Shark's gills | |
| 322. |
In acid rain, water dissolves toxic elements from rocks such as: |
| A. | Cobalt |
| B. | Aluminum |
| C. | Salts |
| D. | CO₂ |
| Answer» C. Salts | |
| 323. |
The maximum efficiency of the electrostatic precipitator is ___________ |
| A. | 95% |
| B. | 80% |
| C. | 99% |
| D. | 100% |
| Answer» D. 100% | |
| 324. |
Temperature gradient of 'ambient' air is known as |
| A. | Lapse rate |
| B. | ELR |
| C. | Atmospheric stability |
| D. | ALR |
| Answer» C. Atmospheric stability | |
| 325. |
Major 'reservoirs' of CO₂ are: |
| A. | Land, water, plants |
| B. | Fossil fuel, soil,, oceans |
| C. | Volcanic Eruption |
| D. | Deforestation |
| Answer» C. Volcanic Eruption | |
| 326. |
Deposition of acid substance, generated from pollution, known as |
| A. | Acid deposition |
| B. | Ozone Depletion |
| C. | Eutrophication |
| D. | Deforestation |
| Answer» B. Ozone Depletion | |
| 327. |
Which of the following is/are natural contributor(s) to sulphur dioxide in the atmosphere? |
| A. | Sea sprays |
| B. | Volcanic eruption |
| C. | Decaying vegetation |
| D. | All of the mentioned |
| Answer» E. | |
| 328. |
Exposure to H₂S for a short period, causes |
| A. | Vomiting |
| B. | Mortality |
| C. | Fatigue |
| D. | Unconsciousness |
| Answer» D. Unconsciousness | |
| 329. |
Acid dissolved nutrients and valuable minerals from the |
| A. | Water |
| B. | Soil |
| C. | Mountains |
| D. | Air |
| Answer» C. Mountains | |
| 330. |
When a given gas has a temperature gradient, the aerosol particles move from higher temperature regions to low temperature regions. This effect is known as __________ |
| A. | Photophoresis |
| B. | Diffusiophoresis |
| C. | Thermophoresis |
| D. | Diffusiophoresis or Thermophoresis |
| Answer» D. Diffusiophoresis or Thermophoresis | |
| 331. |
Which are the two forces balanced by the geostrophic wind? |
| A. | Coriolis effect and pressure gradient force |
| B. | Coriolis force and centrifugal force |
| C. | Frictional force and pressure gradient force |
| D. | Pressure gradient force and centrifugal force |
| Answer» B. Coriolis force and centrifugal force | |
| 332. |
What is the minimum height of the chimney in a thermal power plant of capacity 350MW? |
| A. | 100m |
| B. | 220m |
| C. | 380m |
| D. | 60m |
| Answer» C. 380m | |
| 333. |
The chimney is emitting particulate matter. Which of the following is the correct expression of the height of the chimney? Here ‘Kₚ’ represents the emission of particulate matter. |
| A. | HC = 74 Kₚ⁰·²⁷ |
| B. | HC = 14 Kₚ⁰·²⁷ |
| C. | HC = 14 Kₚ⁰·⁴⁷ |
| D. | HC = 74 Kₚ⁰·³³ |
| Answer» B. HC = 14 Kₚ⁰·²⁷ | |
| 334. |
Coning plume occurs under which conditions? |
| A. | Super adiabatic |
| B. | Sub adiabatic |
| C. | Neutral |
| D. | Inversion |
| Answer» C. Neutral | |
| 335. |
Which of the following is the correct expression of the height of chimney emitting sulfur dioxide? |
| A. | HC = 74 Kₚ⁰·²⁷ |
| B. | HC = 14 Kₚ⁰·³³ |
| C. | HC = 14 Kₚ⁰·⁴⁷ |
| D. | HC = 74 Kₚ⁰·³³ |
| Answer» C. HC = 14 Kₚ⁰·⁴⁷ | |
| 336. |
Are any of the following monitors used to measure the concentration of particular gases from the exhaust generated in vehicles? |
| A. | Opacity monitors |
| B. | Gaseous emission monitors |
| C. | Opacity & Gaseous emission monitors |
| D. | None of the mentioned |
| Answer» C. Opacity & Gaseous emission monitors | |
| 337. |
What is the principle behind which opacity monitors/transmissometers work? |
| A. | Change in capacitance for various gaseous media, between two stationary plates |
| B. | Pressure exerted by a fixed volume of gas enclosed in a container of specific dimension |
| C. | Scattering of light transmitted through a gas stream |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 338. |
Non-Dispersive Ultraviolet (NDUV) analysers are primarily used to detect which of the following two gases? |
| A. | Oxygen and Carbon Dioxide |
| B. | Oxygen and Nitrogen Dioxide |
| C. | Nitrogen Dioxide and Sulphur Dioxide |
| D. | Sulphur Dioxide and Oxygen |
| Answer» D. Sulphur Dioxide and Oxygen | |
| 339. |
What does the abbreviation NDIR stand for, in the category of spectrometric analysers? |
| A. | Non-Destructive Integrated Restoration |
| B. | Neo-Destructive Integrated Radiation |
| C. | Non-Dispersive Infrared |
| D. | Neo-Dispersive Integrated Radiation |
| Answer» D. Neo-Dispersive Integrated Radiation | |
| 340. |
Photochemical smog is a mixture of 'VOCs' and |
| A. | Oxidants |
| B. | Reactants |
| C. | Products |
| D. | Oxides |
| Answer» B. Reactants | |
| 341. |
In-situ in-stack analysers are used for measuring concentrations of which of the following gases? |
| A. | Ammonia |
| B. | Sulphur dioxide |
| C. | Nitrogen monoxide |
| D. | All of the mentioned |
| Answer» E. | |
| 342. |
Gasoline' and 'protroleum' are products of |
| A. | Hydrocarbons |
| B. | Nitrogen |
| C. | Oxides |
| D. | Bicarbonates |
| Answer» B. Nitrogen | |
| 343. |
What does make farm animals most susceptible? |
| A. | Lead toxicity |
| B. | Florine toxicity |
| C. | Sulfur toxicity |
| D. | Nox toxicity |
| Answer» C. Sulfur toxicity | |
| 344. |
What does smog affect ? |
| A. | Urinary tract |
| B. | Lungs |
| C. | Kidneys |
| D. | Heart |
| Answer» C. Kidneys | |
| 345. |
Which of the following are classified as major sources to air pollution? |
| A. | Fuel consumption by local citizens |
| B. | Sewage treatment plants |
| C. | Dry cleaning and laundries |
| D. | None of the mentioned |
| Answer» C. Dry cleaning and laundries | |
| 346. |
'Sulphuric' and 'nitric' emission into atmosphere making stronger: |
| A. | Base |
| B. | Acids |
| C. | Cations |
| D. | Anions |
| Answer» C. Cations | |
| 347. |
What does coal and oil contain ? |
| A. | CO |
| B. | Nitrogen |
| C. | Sulphur impurities |
| D. | CO₂ |
| Answer» D. CO₂ | |
| 348. |
Affinity of hemoglobin for CO is two hundred times more considerable than |
| A. | O₂ |
| B. | CO₂ |
| C. | SOx |
| D. | Nox |
| Answer» B. CO₂ | |
| 349. |
Air-borne particulates are classified as group 1 carcinogens. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |
| 350. |
Which of the following is used in ceramic industries? |
| A. | Electrostatic precipitator |
| B. | Dynamic precipitator |
| C. | Spray tower |
| D. | Wet cyclonic scrubber |
| Answer» C. Spray tower | |