Air [NTA-NET (UGC-NET) Environmental Science (89)]: Questions 19 - 22 of 99
Choose Programs:
📹 Video Course 2024 (244 Lectures [112 hrs : 11 mins]): Offline Support
Rs. 630.00 -OR-
1 Month Validity (Multiple Devices)
Preview All LecturesDetails
⏳ 🎯 Online Tests (6 Tests [100 questions each]): NTA Pattern, Analytics & Explanations
Rs. 1200.00 -OR-
3 Year Validity (Multiple Devices)
Sample TestsDetailsSee Demo
🎓 Study Material (902 Notes): 2024-2025 Syllabus
Rs. 850.00 -OR-
3 Year Validity (Multiple Devices)
Topic-wise Notes & SampleDetails
🎯 1711 MCQs (& PYQs) with Full Explanations (2024-2025 Exam)
Rs. 500.00 -OR-
3 Year Validity (Multiple Devices)
CoverageDetailsSample Explanation
Help me Choose & Register (Watch Video) Already Subscribed?
Question 19
Appeared in Year: 2020
Question Match List-Ⅰ List-Ⅱ▾
Match List I (Air pollutant) with List II (Control technique/equipment)
List-Ⅰ (Air Pollutant) | List-Ⅱ (Control Technique/Equipment) |
---|---|
(A) PM2.5 | (i) Scrubber |
(B) NOX | (ii) Electrostatic precipitator |
(C) SO2 | (iii) Cyclone collectors |
(D) Coarse particulate matter | (iv) Selective catalytic reduction |
Choices
Choice (4) | Response | |
---|---|---|
| ||
a. |
| |
b. |
| |
c. |
| |
d. |
|
Question 20
Appeared in Year: 2015
Question MCQ▾
Which of the following air pollutants are released by thermal power plants? - (June)
(1) Oxides of nitrogen (2) Oxides of Sulphur
(3) Ammonia (4) Carbon monoxide
Choose the correct answer:
Choices
Choice (4) | Response | |
---|---|---|
a. | 1,3 and 4 only | |
b. | 2 and 3 only | |
c. | 1,2, 3 and 4 | |
d. | 1,2 and 4 only |
Question 21
Appeared in Year: 2018
Question MCQ▾
The dominant mechanism (s) of deposition of aerosol particles in the size range 5 – 10 µm in the respiratory tract are:
(i) Sedimentation
(ii) Impaction
(iii) Diffusion
Choose the correct answer from the code given below:
Choices
Choice (4) | Response | |
---|---|---|
a. | i, ii and iii | |
b. | Only i and ii | |
c. | Only ii and iii | |
d. | Only i and iii |
Question 22
Appeared in Year: 2016
Question MCQ▾
An electrostatic precipitator has collection efficiency of for fine particles of a dirty
gas. Its collection area of plates is and gas flow rate is . If the migration
velocity of the particles is changed by by changing the electric field, what will be
the change in collection efficiency? (September)
Choices
Choice (4) | Response | |
---|---|---|
a. | 0.05 | |
b. | 0.005 | |
c. | 0.10 | |
d. | 0.001 |