MCQs on Environmental Science
Solve Environmental Science Multiple-Choice Questions to prepare better for GATE. Learn more about Environmental Science and Environmental Science MCQs by checking notes, mock tests, and previous years’ question papers. Gauge the pattern of MCQs on Environmental Science by solving the ones that we have compiled below for your practice:
Environmental Science Multiple-Choice Questions
1. Which of these expressions is used in the case of population forecasting with the help of the arithmetical increase method?
a. PO – n*x
b. PO + n*x + ( n(n+1)/2 )*y
c. PO + n*x
d. PO (1 + R/100)n
Answer: (c) PO + n*x
2. If the gas and acid are formed in a multiple tube fermentation technique, what is the test performed?
a. Discarded
b. Negative
c. Continued
d. Positive
Answer: (d) Positive
3. What would be the mean velocity gradient’s dimensional formula?
a. T
b. 1/T
c. T2
d. 1/T2
Answer: (b) 1/T
4. A rapid sand filter’s effective size is:
a. 0.9 mm
b. 0.8 mm
c. 0.7 mm
d. 0.45 mm
Answer: (d) 0.45 mm
5. Ozone is an allotrope of oxygen which is ____________ in nature.
a. Polyatomic
b. Triatomic
c. Diatomic
d. Monoatomic
Answer: (b) Triatomic
6. The artificial zeolite permutit is ____________ in colour.
a. Yellow
b. Grey
c. White
d. Green
Answer: (c) White
7. In which of these desalination processes are the salt ions removed from the seawater with the use of electric current?
a. Electro-dialysis
b. Distillation
c. Freezing
d. Reverse osmosis
Answer: (a) Electro-dialysis
8. A reciprocating pump has the maximum efficiency of:
a. 85%
b. 100%
c. 60%
d. 50%
Answer: (a) 85%
9. If the velocity of water in any given pipe is 1.8 m/s, then what should be the diameter of the pipe ideally used?
a. 40 cm
b. 25 cm
c. 15 cm
d. 10 cm
Answer: (a) 40cm
10. Which of these surfaces has the max Kuichling’s impermeability factor?
a. Macadamized road ways
b. Unpaved surface
c. Watertight roof surface
d. Gravel road
Answer: (c) Watertight roof surface
11. An Egg shaped sewer’s upper portion is known as the:
a. Invert
b. Level
c. Wedge
d. Arch
Answer: (d) Arch
12. The ventilating columns are placed at an interval of ______ along any given sewer line.
a. 100 m
b. 150 m
c. 30 m
d. 50 m
Answer: (b) 150 m
13. The Methane is formed after the reduction of the:
a. Organic acids
b. Carbon dioxide
c. Sulphates
d. Nitrates
Answer: (a) Organic acids
14. In lakes, the uppermost zone is known as the ____________ zone.
a. Benthic
b. Euphotic
c. Climate
d. Littoral
Answer: (b) Euphotic
15. In the case of a detritus tank, the design velocity of flow would be:
a. 0.5 m/s
b. 0.9 m/s
c. 1.2 m/s
d. 1 m/s
Answer: (b) 0.9 m/s
16. A plain sedimentation tank’s overflow rate is ____________ litre/day/metre²:
a. 40000
b. 50000
c. 30000
d. 12000
Answer: (d) 12000
17. What device is used in an aeration tank for various cleaning purposes?
a. Tube diffuser
b. Diffuser plate
c. Header pipe
d. Paddles
Answer: (a) Tube diffuser
18. An oxidation pond’s detention period is:
a. 4 hours
b. 30-60 seconds
c. 12-36 hours
d. 10-20 days
Answer: (d) 10-20 days
19. Which of these is NOT an adsorption unit’s part?
a. Multiple fixed bed
b. Moving bed
c. Packed towers
d. Fluidized bed
Answer: (c) Packed towers
20. Which place receives the highest annual rainfall in India?
a. Cherrapunji
b. Phyllut
c. Mawsynram
d. Siju
Answer: (c) Mawsynram
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