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.
| 51. |
It was decided to construct a fabric filter, using bags of 0.45 m diameter and 7.5 m long, for removing industrial stack gas containing particulates. The expected rate of airflow into the filter is 10 m3/s. If the filtering velocity is 2.0 m/min, the minimum number of bags (rounded to nearest higher integer) required for continuous cleaning operation is |
| A. | 27 |
| B. | 29 |
| C. | 31 |
| D. | 32 |
| Answer» C. 31 | |
| 52. |
Cement manufacturing contributes to manmade pollution by releasing the following major pollutant |
| A. | NOx |
| B. | Carbon dioxide |
| C. | Carbon monoxide |
| D. | Waste water |
| E. | Consumption of trees during if production |
| Answer» C. Carbon monoxide | |
| 53. |
In a Gaussian Dispersion Model, the lateral dispersion coefficients are dependent on: |
| A. | Surface roughness |
| B. | Atmospheric Stability |
| C. | Downwind distance |
| D. | Both Atmospheric stability and Downwind distance |
| Answer» E. | |
| 54. |
During which of the following operating conditions of an automobile is carbon monoxide content in the exhaust gas the minimum? |
| A. | Idle running |
| B. | Acceleration |
| C. | Cruising |
| D. | Deceleration |
| Answer» B. Acceleration | |
| 55. |
ISO 14012 provides guidance on |
| A. | Qualification criteria for environmental auditor |
| B. | Management of Environmental Audit Programs |
| C. | EA – General Principles of Environmental Auditing |
| D. | EA – Auditing of Environmental Management Systems |
| Answer» B. Management of Environmental Audit Programs | |
| 56. |
Consider the following statements relating zones of atmosphere to altitude:1. Temperature decreases with altitude in troposphere.2. Speed of sound decreases with altitude in troposphere.3. Temperature increases with altitude in stratosphere.4. Ozone is present in stratosphere which protects people from harmful effects of solar radiation.Which of the above statements are correct? |
| A. | 1, 2 and 3 only |
| B. | 1, 2 and 4 only |
| C. | 3 and 4 only |
| D. | 1, 2, 3 and 4 |
| Answer» E. | |
| 57. |
Emission factor can be defined as: |
| A. | The amount of substance released / intensity of a specific activity |
| B. | The amount of substance released / second |
| C. | The amount of substance released / gram of the fuel burnt |
| D. | The total amount of substance released. |
| Answer» B. The amount of substance released / second | |
| 58. |
In pre-industrial era the concentration of carbon dioxide, CO2 was |
| A. | 200 ppm |
| B. | 360 ppm |
| C. | 265 – 290 ppm |
| D. | 300 ppm |
| Answer» D. 300 ppm | |
| 59. |
Consider the following statements in respect of effect of air pollutants on vegetation:1. Necrosis refers to killing of tissue2. Chlorosis refers to loss or reduction of green plant pigment3. Leaf abscission refers to the dropping of leaves4. Leaf epinasty refers to a downward curvature of a leaf due to a higher rate of growth on the upper surfaceWhich of the above statements are correct? |
| A. | 1, 2 and 3 only |
| B. | 1, 2, 3 and 4 |
| C. | 2, 3 and 4 only |
| D. | 1, 2 and 4 only |
| Answer» C. 2, 3 and 4 only | |
| 60. |
In a sinusoidal wave of the sound pressure, the number of times a peak amplitude arrives in one second is called as |
| A. | Amplitude |
| B. | Wavelength |
| C. | Period |
| D. | None of these |
| Answer» E. | |
| 61. |
Pre-cursors to photochemical oxidants are: |
| A. | NOX, VOCs and sunlight |
| B. | SO2, CO2 and sunlight |
| C. | H2S, CO and sunlight |
| D. | SO2, NH3 and sunlight |
| Answer» B. SO2, CO2 and sunlight | |
| 62. |
HCs are major 'pollutants' because of their role in formation of |
| A. | Photochemical smog |
| B. | PAN |
| C. | NOx |
| D. | SOx |
| Answer» B. PAN | |
| 63. |
Which is the largest-volume manufactured organic chemical? |
| A. | Ethylene |
| B. | Ethane |
| C. | Formaldehyde |
| D. | Carbonic acid |
| Answer» B. Ethane | |
| 64. |
In plants, acids inhibit process of |
| A. | Growth |
| B. | Photosynthesis |
| C. | Transpiration |
| D. | Evaporation |
| Answer» C. Transpiration | |
| 65. |
Temperature inversion indicates a high degree of atmospheric |
| A. | Stability |
| B. | Instability |
| C. | Increase |
| D. | Decrease |
| Answer» B. Instability | |
| 66. |
When temperature changes a hot parcel of air against altitude, providing heat transfer across boundary, resulting condition is known as |
| A. | Adiabatic lapse rate |
| B. | Lapse rate |
| C. | Environmental Lapse Rate |
| D. | ELR |
| Answer» B. Lapse rate | |
| 67. |
Which gas provides carbonation in soft drinks and beverages? |
| A. | Carbon dioxide |
| B. | Oxygen |
| C. | Argon |
| D. | Methane |
| Answer» B. Oxygen | |
| 68. |
Weak acids, only capable of adding, fewer |
| A. | H₂ ions |
| B. | HCl ions |
| C. | Cl ions |
| D. | P ions |
| Answer» B. HCl ions | |
| 69. |
Incinertion, adsorption, condensation and substitution are control methods of |
| A. | HCs |
| B. | Nox |
| C. | CO₂ |
| D. | CO |
| Answer» B. Nox | |
| 70. |
Natural particulates includes pollens, viruses, bacteria, and |
| A. | Volcanic Dust |
| B. | Smoke |
| C. | Fly Ash |
| D. | Inorganic Dusts |
| Answer» B. Smoke | |
| 71. |
What is atmospheric life of CO? |
| A. | 1 and a half month |
| B. | 8 and a half month |
| C. | 2 and a half month |
| D. | 5 and a half month |
| Answer» D. 5 and a half month | |
| 72. |
What is dispersed solid or liquid particles of microscopic size in gaseous media? |
| A. | Aerosols |
| B. | PAN |
| C. | Smog |
| D. | Gaseous particles |
| Answer» B. PAN | |
| 73. |
When plume is sandwiched between inversion, it is known as |
| A. | Fanning |
| B. | Trapping |
| C. | Lofting |
| D. | Looping |
| Answer» C. Lofting | |
| 74. |
Naturally HCs found in atmosphere are produced from the |
| A. | Plants |
| B. | Soil |
| C. | Lithosphere |
| D. | Crust |
| Answer» B. Soil | |
| 75. |
What is the Haldane equation used for? |
| A. | To measure the amount of oxygen converted to ozone for a given wavelength of UV light |
| B. | To measure the ratio of affinity of carbon monoxide and oxygen to bind to a haemoglobin molecule |
| C. | To measure the percentage of carbon monoxide that is oxidised to carbon dioxide in various levels of oxygen |
| D. | To calculate the percentage of oxygen addition and carbon dioxide removal during respiratory action |
| Answer» C. To measure the percentage of carbon monoxide that is oxidised to carbon dioxide in various levels of oxygen | |
| 76. |
Which of the following gases has the highest affinity for blood haemoglobin? |
| A. | Carbon dioxide |
| B. | Oxygen |
| C. | Carbon monoxide |
| D. | Nitrogen |
| Answer» D. Nitrogen | |
| 77. |
Which gas is known as rotten egg smell ? |
| A. | H₂S |
| B. | CO₂ |
| C. | O₂ |
| D. | Argon |
| Answer» B. CO₂ | |
| 78. |
Which of the mentioned devices are used for removing vapour phase/ gaseous pollutants? |
| A. | Absorption towers |
| B. | Catalytic converters |
| C. | Thermal oxidisers |
| D. | All of the mentioned |
| Answer» E. | |
| 79. |
What is/are the inertial method(s) used to measure size of aerosol particles? |
| A. | Particle acceleration method |
| B. | Pulsation method |
| C. | Multi cyclone |
| D. | All of the mentioned |
| Answer» E. | |
| 80. |
Which predators lose a rich food source, when pollutants kill aquatic insects ? |
| A. | animals |
| B. | Ducks |
| C. | Earthworms |
| D. | Sharks |
| Answer» C. Earthworms | |
| 81. |
What is the primary function(s) of the alveoli? |
| A. | Transfer of oxygen to the blood |
| B. | Removal of carbon dioxide from the blood |
| C. | Transfer of toxic substances to the blood |
| D. | All of the mentioned |
| Answer» E. | |
| 82. |
Chemically, reducing high levels of sulfur dioxide is known as: |
| A. | Reducing smog |
| B. | Enhanced Smoke |
| C. | Smog |
| D. | smoke |
| Answer» B. Enhanced Smoke | |
| 83. |
When Richardson number is equal to zero, what is the wind turbulence characteristic? |
| A. | No vertical mixing |
| B. | Weak mechanical turbulence due to stratification |
| C. | Convective mixing is greater than mechanical turbulence |
| D. | Only mechanical turbulence |
| Answer» E. | |
| 84. |
When does Inversion frequently occur ? |
| A. | Summer |
| B. | Winter |
| C. | Autumn |
| D. | Both b and c |
| Answer» E. | |
| 85. |
Natural sources of sulfur dioxide involves: |
| A. | Respiration |
| B. | Cement production |
| C. | PAN |
| D. | Volcanic eruptions |
| Answer» E. | |
| 86. |
When ELR is less than ALR, resulting environmental lapse rate is known as |
| A. | Super Adiabatic |
| B. | Sub-Adiabatic |
| C. | ELR |
| D. | All of above |
| Answer» C. ELR | |
| 87. |
What is the pH value of rain in industrial areas? |
| A. | 4 to 5 |
| B. | 3 to 7 |
| C. | 4 to 8 |
| D. | 2 to 4 |
| Answer» B. 3 to 7 | |
| 88. |
Effects of large particle, would be mild, after trapping into: |
| A. | The nose |
| B. | The lungs |
| C. | The respiratory track |
| D. | The mouth |
| Answer» B. The lungs | |
| 89. |
What are biological particles found in atmosphere? |
| A. | Bacteria, Viruses and Fungi |
| B. | Smoke and gas |
| C. | Inorganic dusts and water vapours |
| D. | Metallic fumes |
| Answer» B. Smoke and gas | |
| 90. |
How many parameters are taken into consideration when measuring air quality, in India? |
| A. | 4 |
| B. | 3 |
| C. | 8 |
| D. | 9 |
| Answer» D. 9 | |
| 91. |
Alkenes is saturated 'hydrocarbons' and fairly |
| A. | an inert gase |
| B. | An active agent |
| C. | Non Active |
| D. | All of Above |
| Answer» B. An active agent | |
| 92. |
Fluorescence analysers are used to analyse which of the following gases? |
| A. | Nitrogen dioxide |
| B. | Sulphur dioxide |
| C. | Sulphur trioxide |
| D. | Nitrous oxide |
| Answer» C. Sulphur trioxide | |
| 93. |
What affected salamanders ? |
| A. | Acidity |
| B. | Pollutions |
| C. | Air pollution |
| D. | Water Pollutions |
| Answer» B. Pollutions | |
| 94. |
What are causes of an acute arsenic poisoning? |
| A. | Thirst, Vomiting, respiratory problem |
| B. | Heart Attack, Vomiting |
| C. | Breathing problem, Fatigue |
| D. | Vomiting, Heart attack |
| Answer» B. Heart Attack, Vomiting | |
| 95. |
Which of the following are sources to fluorine air pollution? |
| A. | Coal combustion |
| B. | Steel industries |
| C. | Phosphate fertiliser manufacturing |
| D. | All of the mentioned |
| Answer» E. | |
| 96. |
Lowest 'pH' measurement observed in kane and Pennsylvania, was approximately |
| A. | 2.9 |
| B. | 4 |
| C. | 3 |
| D. | 2.7 |
| Answer» E. | |
| 97. |
Humidity influences corrosive action of the |
| A. | Air pollutants |
| B. | Water Pollutants |
| C. | Solid material |
| D. | All of above |
| Answer» B. Water Pollutants | |
| 98. |
What is the range of vapour pressure of VOCs? |
| A. | High vapour pressure |
| B. | Low vapour pressure |
| C. | Depends on the concentration of VOCs |
| D. | Depends on the type of VOCs |
| Answer» C. Depends on the concentration of VOCs | |
| 99. |
An acid is a chemical substance, that adds hydrogen ion to the |
| A. | Atmosphere |
| B. | Solution |
| C. | Water |
| D. | Mixture |
| Answer» C. Water | |
| 100. |
Flame photometric analysers are specific to sulphur compounds. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» B. False | |