MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Air Pollution And Noise Pollution knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The concentration of Sulphur Dioxide (SO2) in ambient atmosphere was measured as 30 mg/m . Under the same conditions, the above SO2 concentration expressed in ppm is ___. Given: P/(RT) = 41.6 mol/m ; where, P = Pressure; T = Temperature; R= universal gas constant; Molecular Weight of SO2 = 64. |
| A. | 3.0113 ppm |
| B. | 2.0113 ppm |
| C. | 0.0113 ppm |
| D. | 1.0113 ppm |
| Answer» D. 1.0113 ppm | |
| 2. |
Column IColumn IIP. Coriolis effect1. Rotation of earthQ. Fumigation2. Lapse rate and vertical temperature profileR. Ozone layer3. InversionS. Maximum mixing depth (mixing height)4. DobsonThe correct match of Column I with Column II is |
| A. | P-2, Q-1, R-4, S-3 |
| B. | P-2, Q-1, R-3, S-4 |
| C. | P-1, Q-3, R-2, S-4 |
| D. | P-1, Q-3, R-4, S-2 |
| Answer» E. | |
| 3. |
Two electrostatic precipitators (ESPs) are in series. The fractional efficiencies of the upstream and downstream ESPs for size dp are 80% and 65% respectively. What is the overall efficiency of the system for the same dp? |
| A. | 100% |
| B. | 93% |
| C. | 80% |
| D. | 65% |
| Answer» C. 80% | |
| 4. |
The mean indoor airborne chloroform (CHCl3) concentration in a room was determined to be 0.4 mg/m . Use the following data: T = 293 K, P = 1 atmosphere, R = 82.05 10 6 atm. m /mol-K, Atomic weights: C = 12, H = 1, Cl = 35.5. This concentration expressed in parts per billion (volume basis, ppbv) is equal to |
| A. | 1.00 ppbv |
| B. | 0.20 ppbv |
| C. | 0.10 ppbv |
| D. | 0.08 ppbv |
| Answer» E. | |
| 5. |
SO2 and CO adversely affect |
| A. | oxygen carrying capacity of blood and functioning of lungs respectively |
| B. | functioning of the respiratory system and brain respectively |
| C. | functioning of the respiratory system and oxygen carrying capacity of blood respectively |
| D. | functioning of air passages and chest respectively |
| Answer» D. functioning of air passages and chest respectively | |
| 6. |
The concentration of Sulphur Dioxide (SO |
| A. | 3.0113 ppm |
| B. | 2.0113 ppm |
| C. | 0.0113 ppm |
| D. | 1.0113 ppm |
| Answer» D. 1.0113 ppm | |
| 7. |
The mean indoor airborne chloroform (CHCl |
| A. | 1.00 ppbv |
| B. | 0.20 ppbv |
| C. | 0.10 ppbv |
| D. | 0.08 ppbv |
| Answer» E. | |
| 8. |
Two electrostatic precipitators (ESPs) are in series. The fractional efficiencies of the upstream and downstream ESPs for size d |
| A. | 100% |
| B. | 93% |
| C. | 80% |
| D. | 65% |
| Answer» C. 80% | |
| 9. |
SO |
| A. | oxygen carrying capacity of blood and functioning of lungs respectively |
| B. | functioning of the respiratory system and brain respectively |
| C. | functioning of the respiratory system and oxygen carrying capacity of blood respectively |
| D. | functioning of air passages and chest respectively |
| Answer» D. functioning of air passages and chest respectively | |
| 10. |
Particulate matter (fly ash) carried in effluent gases from the furnaces burning fossil fuels are better removed by |
| A. | cotton bag house filter |
| B. | electrostatic precipitator (ESP) |
| C. | cyclone |
| D. | wet scrubber |
| Answer» C. cyclone | |
| 11. |
Total suspended particulate matter (TSP) concentration in ambient air is to be measured using a high volume sampler. The filter used for this purpose had an initial dry weight of 9.787 g. The filter was mounted in the sampler and the initial air flow rate through the filter was set at 1.5 m /min. Sampling continued for 24 hours. The airflow after 24 hours was measured to be 1.4 m /min. The dry weight of the filter paper after 24 hours sampling was 10.283 g. Assuming a linear decline in the air flow rate during sampling, what is the 24 hours average TSP concentration in the ambient air? |
| A. | 59.2 mg/m |
| B. | 118.6 mg/m |
| C. | 237.5 mg/m |
| D. | 574.4 mg/m |
| Answer» D. 574.4 mg/m | |
| 12. |
An air parcel having 40 C temperature moves from ground level to 500 m elevation in dry air following the adiabatic lapse rate . The resulting temperature of air parcel at 500 m elevation will be |
| A. | 35 C |
| B. | 38 C |
| C. | 41 C |
| D. | 44 C |
| Answer» B. 38 C | |
| 13. |
According to the noise pollution (Regulation and Control) Rules, 2000, of the Ministry of Environment and Forests, India, the day time and night time noise level limits in ambient air for residential areas expressed in dB(A) Leg are |
| A. | 50 and 40 |
| B. | 55 and 45 |
| C. | 65 and 55 |
| D. | 75 and 70 |
| Answer» C. 65 and 55 | |
| 14. |
The dispersion of pollutants in atmosphere is maximum when |
| A. | environmental lapse rate is greater than adiabatic lapse rate |
| B. | environmental lapse rate is less than adiabatic lapse rate |
| C. | environmental lapse rate is equal to adiabatic lapse rate |
| D. | maximum mixing depth is equal to zero |
| Answer» B. environmental lapse rate is less than adiabatic lapse rate | |
| 15. |
The reference pressure used I the determination of sound pressure level is |
| A. | 20mPa |
| B. | 20dB |
| C. | 10mPa |
| D. | 10dB |
| Answer» B. 20dB | |