UGC NET Environmental Science Unit 6 PYQs, Important Questions

UGC NET Environmental Science Unit 6 focuses on important topics related to air pollution, soil pollution, and noise pollution. Understanding these concepts is essential for building a strong foundation in environmental monitoring, pollution control, and ecosystem management. Previous Year Questions (PYQs) help candidates identify frequently asked topics, understand the exam pattern, and improve conceptual clarity.

The questions in this unit cover particle dynamics, ozone depletion, dissolved oxygen, soil properties, fertilizer composition, vermicomposting, noise measurement indices, and environmental standards. Regularly practicing these PYQs can enhance problem-solving skills and boost confidence for the UGC NET Environmental Science examination. 

UGC NET Environmental Science Unit 6 PYQs

Below are the UGC NET Environmental Science Unit 6 Previous Year Questions (PYQs) covering important topics from air pollution, soil pollution, and noise pollution. These questions help candidates understand key environmental concepts, identify frequently asked topics, and gain familiarity with the exam pattern. Regular practice of these PYQs can improve conceptual clarity, strengthen problem-solving skills, and enhance overall preparation for the UGC NET Environmental Science examination.

1. The impaction of particles is directly proportional to:
a) Particle density and particle diameter
b) Particle density only
c) Wind speed only
d) Humidity only

Answer: a) Particle density and particle diameter

2. Arrange the following Beaufort wind categories in increasing order of wind speed:
a) Hurricane < Storm < Gale < Breeze
b) Breeze < Gale < Storm < Hurricane
c) Storm < Gale < Breeze < Hurricane
d) Gale < Breeze < Storm < Hurricane

Answer: b) Breeze < Gale < Storm < Hurricane

3. A 1% reduction in stratospheric ozone results in approximately what percentage increase in UV-B radiation?
a) 1%
b) 2%
c) 5%
d) 10%

Answer: b) 2%

4. Dissolved Oxygen (DO) concentration in water is:
a) Directly proportional to temperature
b) Independent of temperature
c) Inversely proportional to temperature
d) Equal to atmospheric oxygen concentration

Answer: c) Inversely proportional to temperature

5. Soil particles having a diameter less than 0.002 mm are classified as:
a) Sand
b) Silt
c) Gravel
d) Colloids

Answer: d) Colloids

6. Which soil type has the highest water storage capacity?
a) Sandy Loam
b) Loam
c) Clay Loam
d) Heavy Clay

Answer: d) Heavy Clay

7. In fertilizer notation 5-10-5, the second number represents:
a) Nitrogen
b) Phosphorus (P₂O₅)
c) Potassium (K₂O)
d) Sulphur

Answer: b) Phosphorus (P₂O₅)

8. Which of the following factors affects vermicomposting?
a) Moisture content
b) Type of earthworm
c) Quality of organic waste
d) All of the above

Answer: d) All of the above

9. L90 in noise monitoring refers to:
a) Maximum noise level
b) Average noise level
c) Noise level exceeded for 90% of the time
d) Peak noise level

Answer: c) Noise level exceeded for 90% of the time

10. Noise Climate is represented by:
a) L50 – L10
b) L10 – L90
c) L90 – L10
d) Leq – Lmax

Answer: b) L10 – L90

11. For a point source, sound level decreases by how much for every doubling of distance?
a) 2 dB
b) 3 dB
c) 6 dB
d) 10 dB

Answer: c) 6 dB

12. The prescribed duration for Leq measurement in urban ambient noise standards is:
a) 1 hour
b) 4 hours
c) 8 hours
d) 24 hours

Answer: c) 8 hours

13. The threshold of pain for a healthy human ear is approximately:
a) 100 dB
b) 120 dB
c) 140 dB
d) 160 dB

Answer: c) 140 dB

14. Which scale is most commonly used for environmental noise measurement?
a) dB(C)
b) dB(A)
c) dB(D)
d) dB(E)

Answer: b) dB(A)

15. At 90 dB exposure for 8 hours, the noise dose is considered:
a) 25%
b) 50%
c) 75%
d) 100%

Answer: d) 100%

Benefits of Practicing UGC NET Environmental Science Unit 6 PYQs

Regularly solving UGC NET Environmental Science Unit 6 PYQs helps candidates develop a strong understanding of key topics in air, soil, and noise pollution. It also improves familiarity with the exam pattern and enhances problem-solving skills.

• Identifies Important Topics: Helps you focus on frequently asked concepts such as ozone depletion, dissolved oxygen, soil properties, and noise measurement.

• Improves Conceptual Clarity: Strengthens understanding of environmental processes, pollution control mechanisms, and monitoring techniques.

• Enhances Problem-Solving Skills: Develops the ability to solve numerical and application-based questions quickly and accurately.

• Familiarizes You with Exam Patterns: Provides insights into the types of questions commonly asked in the UGC NET Environmental Science exam.

• Boosts Revision Efficiency: Enables quick revision of key concepts, formulas, and environmental standards before the examination.

• Improves Time Management: Helps candidates practice answering questions within the allotted exam time.

• Identifies Strengths and Weaknesses: Reveals areas that require additional study and practice.

• Increases Accuracy: Regular exposure to PYQs reduces errors and improves answer selection in objective-type questions.

• Builds Exam Confidence: Familiarity with previous questions reduces exam anxiety and increases confidence.

• Supports Better Scores: Consistent practice enhances overall preparation and improves the chances of achieving a higher score in the UGC NET Environmental Science examination.